A rock contains one-fourth of its original amount of potassium-40. The half life of potasium-40 is 1. 3 billion years. Calculate the rock´s age

Answers

Answer 1

The age of the rock is approximately 2.6 billion years.

The fact that the rock contains one-fourth of its original amount of potassium-40 means that three-quarters of the original potassium-40 has decayed.

Since the half-life of potassium-40 is 1.3 billion years, this means that the rock has gone through two half-lives of decay.

To calculate the age of the rock, we can use the following formula:

age = number of half-lives x half-life

In this case, the number of half-lives is 2 and the half-life is 1.3 billion years. Plugging these values into the formula, we get:

age = 2 x 1.3 billion years

age = 2.6 billion years

to know more about age of the rock refer here:

https://brainly.com/question/31257496#

#SPJ11


Related Questions

in day 1 of this multi-step experiment, we use two acids - acetic acid and sulfuric acid. what is the role of the sulfuric acid? group of answer choices

Answers

Sulfuric acid may act as a catalyst, protonating agent or dehydrating agent in the multi-step experiment where both acetic acid and sulfuric acid are used on day 1.

Sulfuric acid is often used as a catalyst in chemical reactions. In the multi-step experiment where both acetic acid and sulfuric acid are used on day 1, sulfuric acid may act as a catalyst for one or more of the reactions. Sulfuric acid can also protonate certain functional groups in organic compounds, making them more reactive towards other reagents in the reaction mixture.

Additionally, sulfuric acid can act as a dehydrating agent, removing water from the reaction mixture and driving the reaction towards the formation of the desired product. The specific role of sulfuric acid in the multi-step experiment will depend on the nature of the reactions being carried out and the specific reaction conditions.

To know more about sulfuric acid, here

brainly.com/question/30039513

#SPJ4

--The complete question is, What is the role of sulfuric acid in a multi-step experiment where both acetic acid and sulfuric acid are used on day 1?--

What is the molarity of a solution of ammonium chloride prepared by diluting 50. 0 mL of 3. 79 M ammonium chloride solution to 2. 0 L?

Answers

The molarity of the diluted ammonium chloride solution is 0.09475 M.

The molarity of the diluted ammonium chloride solution, we can use the equation:

[tex]M_1V_1 = M_2V_2[/tex]

here [tex]M_1[/tex] is the initial molarity

[tex]V_1[/tex] is the initial volume,

[tex]M_2[/tex] is the final molarity, and

[tex]V_2[/tex] is the final volume.

[tex]M_1[/tex] = 3.79 M (from the initial solution)

,[tex]V_1[/tex]  = 50.0 mL = 0.050 L (from the initial solution)

[tex]V_2[/tex] = 2.0 L (the final volume after dilution)

For  [tex]M_2[/tex] , we get:

[tex]M_2[/tex]  = ( [tex]M_1[/tex] × ,[tex]V_1[/tex] ) /  [tex]V_2[/tex]

[tex]M_2[/tex]  = (3.79 M × 0.050 L) / 2.0 L

[tex]M_2[/tex]  = 0.09475 M

Therefore, the molarity of the diluted ammonium chloride solution is 0.09475 M.

Learn more about molarity Visit: brainly.com/question/17138838

#SPJ4

1aluminum has a heat of fusion of 0.9 j/g. if you have 23.9g of aluminum, how much energy would be required to melt this amount of aluminum at 660.3°c?

Answers

Aluminum has a heat of fusion of 0.9 j/g. if you have 23.9g of aluminum, 21.51 J of energy would be required to melt this amount of aluminum at 660.3°c.

To calculate the energy required to melt 23.9 g of aluminum, we need to use the following formula:

Q = m * ΔHfus

where Q is the energy required, m is the mass of aluminum, and ΔHfus is the heat of fusion of aluminum.

Substituting the given values, we get:

Q = 23.9 g * 0.9 J/g = 21.51 J

Therefore, 21.51 J of energy would be required to melt 23.9 g of aluminum at 660.3°C.

To know more about the heat of fusion refer here :

https://brainly.com/question/14053504#

#SPJ11

Ethylene glycol has a density of 1. 1 kg/L. How many liters of ethylene glycol should be added to the water in the radiator to protect the system to -18°C?

Answers

Approximately 1.82 liters of ethylene glycol should be added to the water in the radiator to make a 50:50 mixture that will protect the system to -18°C.

A 50:50 mixture of ethylene glycol and water is recommended to provide protection down to approximately -37°C. This mixture will provide freeze point depression of approximately -34°C. We can use the following equation to calculate the volume of ethylene glycol required:

Veth = (Vtot × Ceth) / ρeth

where:

Veth = volume of ethylene glycol

Vtot = total volume of mixture

Ceth = concentration of ethylene glycol

ρeth = density of ethylene glycol

To calculate volume of ethylene glycol required to make a 50:50 mixture, we can substitute these values into the equation:

[tex]Veth = (Vtot * Ceth) / \rho eth \\Veth = (4 L * 0.5) / 1.1 kg/L \\Veth = 1.82 L[/tex]

To know more about ethylene glycol, here

brainly.com/question/10405060

#SPJ4

What is the concentration of KBr in a solution prepared by mixing 0. 200 L of 0. 053 M KBr with
0. 550 L of 0. 078 M KBr?

Answers

The concentration of KBr in the solution prepared by mixing 0.200 L of 0.053 M KBr with 0.550 L of 0.078 M KBr is 0.0713 M.

The concentration of KBr in the solution can be calculated using the formula:

Concentration = (moles of solute) / (volume of solution in liters)

First, we need to find the moles of KBr in each solution by multiplying the volume of the solution by its molarity:

0.200 L x 0.053 M = 0.0106 moles KBr
0.550 L x 0.078 M = 0.0429 moles KBr

Next, we need to add the moles of KBr from each solution to find the total moles of KBr in the final solution:

0.0106 moles KBr + 0.0429 moles KBr = 0.0535 moles KBr

Finally, we can use the total moles of KBr and the total volume of the solution (which is the sum of the two volumes used) to calculate the concentration:

Concentration = 0.0535 moles / (0.200 L + 0.550 L)
Concentration = 0.0535 moles / 0.750 L
Concentration = 0.0713 M

Therefore, the concentration of KBr in the solution prepared by mixing 0.200 L of 0.053 M KBr with 0.550 L of 0.078 M KBr is 0.0713 M.

To know more about KBr, visit:

https://brainly.com/question/18248722#

#SPJ11

Please help ill give brainiest


red tape can be used to repair a broken taillight a car. in one or two sentences, explain how different colors of light are
transmitted, reflected, and absorbed by this kind of tape. (2 points)

Answers

Red tape is used to repair a broken red taillight of a car as it is transparent to red light, reflects and absorbs other colors of light.

When white light (which is made up of different colors of light) hits the red tape, it absorbs all colors except for red, which is transmitted through the tape.

This is due to the selective absorption property of the tape, which means that it absorbs certain colors of light while allowing others to pass through. Additionally, the tape also reflects red light, which allows it to mimic the original color of the taillight and appear red when viewed from behind.

This property of selective absorption and reflection makes red tape a suitable material for repairing a broken red taillight of a car.

To know more about Red tape refer to-

https://brainly.com/question/28601882

#SPJ11

6. a monobasic organic acid x has the composition 31. 6% carbon, 5. 3% hydrogen and 63. 1% oxygen.

a. what is the empirical formula of acid x?

b. an aqueous solution solution contains 11. 4 g of x per dm. 20 cm of this solution required 30

cm² of 0. 100 mol dm naoh for reaction in a titration. calculate the relative molecular mass of

the acid.

Answers

A) The empirical formula of acid X is CH2O since it contains 31.6% carbon, 5.3% hydrogen, and 63.1% oxygen, b) the relative molecular mass of acid X is 34.2 g mol⁻¹.

What is empirical formula?

An empirical formula is a chemical formula that indicates the simplest, whole number ratio of atoms in a molecule. It shows the types of atoms and the number of each type of atom that make up a single molecule of a compound.

a. The empirical formula of acid X is CH2O since it contains 31.6% carbon, 5.3% hydrogen, and 63.1% oxygen.

b. The number of moles of acid X in 11.4 g of the solution is 11.4/M, where M is the relative molecular mass of acid X. The number of moles of NaOH required to react with this amount of acid X is 0.100 mol dm⁻³ × 30 cm² = 0.03 mol. Thus, the mole ratio of acid X to NaOH is 11.4/M : 0.03, or M : 0.03 × 11.4/M. This can be rearranged to give M = 0.03 × 11.4/M, or M = 34.2 g mol⁻¹. Therefore, the relative molecular mass of acid X is 34.2 g mol⁻¹.

To learn more about empirical formula

https://brainly.com/question/1603500

#SPJ4

Let's say that the ground water is contaminated with barium ions caused by a barium chloride spill. We could add sodium sulfate to cause barium sulfate to precipitate according to the following balanced equation: BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (8) + 2 NaCl (aq). Aqueous ions are too small to filter, but a precipitate is not too small. Now, the BaSO4(s) can be filtered out of the water. Does this procedure remove all of the barium ions from the water? Explain. ​

Answers

This procedure of filtering barium sulfate out of water doesn't remove all of the barium ions from the water.

The balanced equation is

BaCl₂(aq) + K₂SO₄(aq) → BaSO₄(s) + 2KCl(aq)

The reaction consumes 1 mole of barium chloride. The reaction produces 1 mole of barium sulfate and 2 moles of potassium chloride. This type of reaction is an example of a double displacement reaction where mutual exchange of cation and anion takes place.

Since, the aqueous ions are too small to filter they are carried away with the filtrate solution, leaving behind the precipitate. So, Barium ions will still be present in the solution of water.

To know more about barium sulfate here

https://brainly.com/question/14441416

#SPJ4

Gold reacts with the elements in group 7 of the periodic table. 0. 175g of gold reacts with chlorine. The equation for the reaction is: 2Au + 3Cl = 2AuCl3. Calculate the mass of chlorine needed to react with 0. 175g of gold. Give your answer in mg. Relative atomic masses(Ar) : Cl = 35. 5 Au= 197

Answers

Here, 47.29 mg of chlorine is needed to react with 0.175g of gold.

To calculate the mass of chlorine needed to react with 0.175g of gold, we will use the equation and the relative atomic masses provided.

1. First, find the moles of gold:

Moles of gold = mass / relative atomic mass

Moles of gold = 0.175g / 197g/mol

                       = 0.0008883 mol

2. According to the balanced equation, 2 moles of gold react with 3 moles of chlorine. So, we need to find the moles of chlorine required:

Moles of chlorine = (3/2) * moles of gold

Moles of chlorine = (3/2) * 0.0008883 mol

                             = 0.001332 mol

3. Now, find the mass of chlorine needed:

Mass of chlorine = moles of chlorine * relative atomic mass

Mass of chlorine = 0.001332 mol * 35.5g/mol

                            = 0.04729g

4. Finally, convert the mass from grams to milligrams:

Mass of chlorine in mg = 0.04729g * 1000mg/g

                                      = 47.29mg

To know more about the molar concept, click below.

https://brainly.com/question/23711705

#SPJ11

PLEASE HELP!!!!


A 60mL HCl solution is titrated with 25mL of a 0. 60M KOH solution. What is the concentration of the HCl solution?



1) 2. 5 mol/L


2) 0. 65 mol/L


3) 1. 56 mol/L


4) 0. 25 mol/L

Answers

The concentration of the HCl solution is 0.25 mol/L .

To determine the concentration of the HCl solution when titrated with 25mL of a 0.60M KOH solution, we need to use the following equation:
moles of HCl = moles of KOH

First, let's find the moles of KOH:
moles of KOH = volume (L) × concentration (M)
moles of KOH = 0.025 L × 0.60 mol/L
moles of KOH = 0.015 mol

Since the moles of HCl = moles of KOH, we have 0.015 mol of HCl. Now, we can calculate the concentration of the HCl solution:
concentration of HCl (M) = moles of HCl / volume of HCl (L)

The volume of HCl solution is given as 60 mL, which is equal to 0.060 L. Therefore:
concentration of HCl (M) = 0.015 mol / 0.060 L
concentration of HCl (M) = 0.25 mol/L
The concentration of the HCl solution is 0.25 mol/L (option 4).

To know more about concentration of the HCl solution  :

https://brainly.com/question/16998467

#SPJ11

How many moles are in 1. 25 x 10^20 molecules of HF? Show your work

Answers

There are 0.0208 moles in 1.25 x 10^20 molecules of HF.

To determine the number of moles in 1.25 x 10^20 molecules of HF, we need to use Avogadro's number. Avogadro's number is the number of particles in one mole of a substance, and it is equal to 6.022 x 10^23 particles/mol.

So, first we need to convert the number of molecules of HF into the number of moles:

1.25 x 10^20 molecules HF x (1 mol HF/6.022 x 10^23 molecules HF) = 0.0208 mol HF

Therefore, there are 0.0208 moles in 1.25 x 10^20 molecules of HF.

Know more about Avogadro's number here:

https://brainly.com/question/28812626

#SPJ11

The Goodyear Blimp has a volume of 5. 74 x 10e6 L. If it was also filled with hydrogen, how many moles of hydrogen would fit into the blimp?

Answers

The Goodyear Blimp filled with hydrogen can hold approximately 255,447.62 moles of hydrogen.

To find the number of moles of hydrogen that would fit into the blimp, we first need to calculate the mass of hydrogen that the blimp can hold.

The molar mass of hydrogen is 2.016 g/mol.

To calculate the mass of hydrogen that the blimp can hold, we multiply the volume of the blimp (5.74 x 10^6 L) by the density of hydrogen at standard temperature and pressure (STP), which is 0.0899 g/L:

Mass of hydrogen = volume of blimp x density of hydrogen at STP
Mass of hydrogen = 5.74 x 10^6 L x 0.0899 g/L
Mass of hydrogen = 515,026 g

Now, we can calculate the number of moles of hydrogen by dividing the mass of hydrogen by its molar mass:

Number of moles of hydrogen = mass of hydrogen / molar mass of hydrogen
Number of moles of hydrogen = 515,026 g / 2.016 g/mol
Number of moles of hydrogen = 255,447.62 mol

So, approximately 255,447.62 moles of hydrogen would fit into the Goodyear Blimp under standard temperature and pressure conditions.

Learn more about moles at https://brainly.com/question/29367909

#SPJ11

0. 063L solution of Ba(OH02 is neutralized by 0. 0234L of a 1. 52 M HNO3 solution. What is the concentration of the Ba(OH)2 solution

Answers

The concentration of the Ba(OH)₂ solution is 0.1 M.

To find the concentration of the Ba(OH)₂ solution, we can use the balanced equation for the neutralization reaction between Ba(OH)₂ and HNO₃:

Ba(OH)₂ + 2HNO₃ → Ba(NO₃)₂ + 2H₂O

From the equation, we can see that one mole of Ba(OH)₂ reacts with two moles of HNO₃. Therefore, the moles of HNO₃ used in the neutralization reaction can be calculated as follows:

moles of HNO₃ = 1.52 M × 0.0234 L = 0.035568 mol

Since the moles of HNO₃ is equal to the moles of Ba(OH)₂ in the reaction, we can calculate the concentration of the Ba(OH)₂ solution as follows:

concentration of Ba(OH)₂ = moles of Ba(OH)₂ / volume of Ba(OH)₂ solution

moles of Ba(OH)₂ = moles of HNO₃ / 2 = 0.035568 mol / 2 = 0.017784 mol

volume of Ba(OH)₂ solution = 0.063 L

concentration of Ba(OH)₂ = 0.017784 mol / 0.063 L ≈ 0.1 M

To know more about concentration, refer here:

https://brainly.com/question/30639206#

#SPJ11

Determine the pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244. 6 mL at 25°C. Carry out two calculations: in the first calculation, assume that methane behaves as an ideal gas; in the second calculation, assume that methane behaves as a real gas and obeys the van der Waals equation

Answers

When, 1 mole of methane at 25°C in a 244.6 mL bulb would exert a pressure of 2.79 atm assuming it behaves as a real gas and obeys the van der Waals equation.

First, let's calculate the pressure exerted by 1 mole of methane at 25°C assuming it behaves as an ideal gas;

We can use Ideal Gas Law to calculate the pressure;

PV = nRT

where P is pressure, V is volume, n is number of moles, R is gas constant, and T is the temperature in Kelvin.

Converting the volume of the bulb to liters and the temperature to Kelvin;

V = 244.6 mL = 0.2446 L

T = 25°C = 298 K

For 1 mole of methane;

n = 1 mole

The gas constant for the Ideal Gas Law is;

R = 0.0821 L·atm/(mol·K)

Substituting the values into Ideal Gas Law equation;

P = (nRT) / V

P = (1 mole) x (0.0821 L·atm/(mol·K)) x (298 K) / (0.2446 L)

P = 3.24 atm

Therefore, 1 mole of methane at 25°C in a 244.6 mL bulb would exert a pressure of 3.24 atm assuming it behaves as an ideal gas.

Now, let's calculate the pressure exerted by 1 mole of methane at 25°C assuming it behaves as a real gas and obeys the van der Waals equation;

The van der Waals equation is;

(P + a(n/V)²) (V - nb) = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, T is the temperature in Kelvin, a is a constant that takes into account the attractive forces between molecules, b is a constant that takes into account the volume of the molecules, and (n/V) is the molar density.

For methane, the values of the van der Waals constants are;

a = 2.253 atm L²/mol

b = 0.0428 L/mol

Substituting the values into the van der Waals equation and solving for P;

P = (nRT / (V - nb)) - (a(n/V)² / V²)

P = (1 mole) x (0.0821 L·atm/(mol·K)) x (298 K) / (0.2446 L - (0.0428 L/mol x 1 mole)) - (2.253 atm L²/mol² / (0.2446 L)²)

P = 2.79 atm

Therefore, the pressure is  2.79 atm.

To know more about van der Waals equation here

https://brainly.com/question/5803619

#SPJ4

It is the basic element of drawing that helps us illustrate the realistic view of an object *

line

alphabet of lines

drawing

lay-out

Answers

The basic element of drawing that helps us illustrate the realistic view of an object is the "line."

Lines are essential as they define shapes, outlines, and edges of objects in drawings. The "alphabet of lines" refers to the different types of lines used in technical drawing, such as continuous, dashed, and dotted lines.

These lines help convey various details and aspects of the object being drawn.

In the "drawing" process, you use these lines to create a realistic representation of an object by capturing its dimensions, proportions, and perspective.

The "layout" is the arrangement of these lines and shapes on the drawing surface, ensuring a clear and organized presentation. To "generate" a drawing, you must effectively utilize these lines, the alphabet of lines, and the layout to create a visually accurate representation of the object you are depicting.

By incorporating these terms and concepts, you can create a detailed and realistic drawing that effectively communicates the appearance and characteristics of the object in question.

To know more about line refer here: https://brainly.com/question/31537328#

#SPJ11

Which of the following chemical reactions represents a single replacement reaction?

A. H3PO4 (aq) + NH4OH (aq) NH4PO4 (aq) + H2O (l)

B. Ca(OH)2 (aq) + Al2(SO4)3 (aq) CaSO4 (aq) + Al(OH)3 (aq)

C. Na (aq) + H2O (aq) NaOH (aq) + H2 (g)

D. NH4OH (aq) + KCl (aq) KOH (aq) + NH4Cl (aq)

Answers

C. Na (aq) + H2O (aq) NaOH (aq) + H2 (g) of the following chemical reactions represents a single replacement reaction

What three categories of single replacement responses exist?

When a more reactive ingredient in a compound replaces a less reactive element, the reaction is referred to as a single displacement reaction. Metal, hydrogen, and halogen displacement reactions are the three different types of displacement reactions.

When chlorine is introduced to a solution of sodium bromide in gaseous form (or as a gas dissolved in water), bromine is replaced by chlorine. Sodium bromide's bromine is replaced with chlorine because it is more reactive than bromine, which causes the solutions to become blue.

learn more about single-displacement

brainly.com/question/7959057

#SPJ1

When calcium metal reacts with chlorine gas a new compound is formed. Which is the correct formula for that compound?.

Answers

When calcium metal reacts with chlorine gas, they form an ionic compound known as calcium chloride. The chemical formula for calcium chloride is [tex]CaCl2[/tex].

During the reaction, calcium metal loses two electrons to form [tex]Ca2+[/tex] ions while chlorine gas accepts these electrons to form [tex]Cl-[/tex] ions.

The electrostatic attraction between the positively charged [tex]Ca2+[/tex] ions and negatively charged [tex]Cl-[/tex] ions results in the formation of the solid ionic compound, calcium chloride.

Calcium chloride is a white crystalline solid that is highly soluble in water. It has a wide range of applications in industries such as food, pharmaceuticals, and de-icing of roads.

Additionally, it is used as a drying agent in laboratory procedures and as a source of calcium ions in biological and medical applications.

To know more about calcium chloride refer to-

https://brainly.com/question/664620

#SPJ11

Draw all possible lewis structures (including resonance structures for methyl azide (ch3n3 using lewis structure rules. One or more of your structures may seem unstable or unlikely; include them in your answer as long as they do not violate lewis structure rules. For each resonance structure, assign formal charges to all atoms that have formal charge. Draw all possible lewis dot structure for methyl azide. Include all hydrogen atoms and nonbonding electrons. Show the formal charges of all atoms

Answers

Methyl azide (CH3N3) has three possible Lewis structures, as shown below:

Structure 1:
H
|
H - C = N
|
N
|
N

Structure 2:
H
|
H - C ≡ N
|
N
|
N

Structure 3:
H
|
H - C ≡ N+
|
N-
|
N

In Structure 1, there is a double bond between the central carbon atom and one of the nitrogen atoms, and a single bond between the central carbon atom and the other nitrogen atom. In Structure 2, there is a triple bond between the central carbon atom and one of the nitrogen atoms, and a single bond between the central carbon atom and the other nitrogen atom. In Structure 3, there is a triple bond between the central carbon atom and the positively charged nitrogen atom, and a single bond between the central carbon atom and the negatively charged nitrogen atom.

All three structures satisfy the octet rule for all atoms and obey the Lewis structure rules.

For resonance structures, we can observe that Structures 1 and 2 are actually resonance structures of each other, as the double and triple bonds can be interchanged without violating any valence electron rules. Therefore, we can draw a hybrid structure that represents the average of these two resonance structures:

Hybrid Structure:
H
|
H - C = N ⇌ H - C ≡ N
|
N
|
N

In this hybrid structure, the double and triple bonds have equal bond order and the formal charges on all atoms are as follows:

Carbon: 0
Nitrogen (single bond): 0
Nitrogen (double/triple bond): 0
Hydrogen: +1

Note that the formal charge on the carbon atom is zero in all structures, and the formal charges on the nitrogen and hydrogen atoms are all either zero or +1, which are the most stable formal charges for these atoms.

How many grams of Barium Chloride are needed to make 220 mL of 0.040 M solution?

Answers

1.2 grams of Barium Chloride (BaCl₂) are needed to make 220 mL of 0.040 M solution.

How to find the mass

To determine the amount of grams of Barium Chloride (BaCl₂) needed to compound a 220 mL 0.040 M solution, we can implement the following formula:

mass (in grams) = molarity × volume (in liters) × molar mass

convert the volume of the mixture from milliliters (mL) to litres (L):

220 mL =  0.220 L by : 220/1000

The molar mass of BaCl₂ is 137.33 g/mo

Therefore, when utilizing the equation above, we can deduce that:

mass = 0.040 mol/L × 0.220 L × 137.33 g/mol = 1.2 g

Learn more about Barium Chloride at

https://brainly.com/question/29519054

#SPJ1

How many liters of iodine gas will be produced from the complete decomposition of 110 l of hydrogen iodine​

Answers

49.3 liters of iodine gas will be produced from the complete decomposition of 110 liters of hydrogen iodide gas at STP.

The balanced chemical equation for the decomposition of hydrogen iodide is:

2HI (g) → H₂ (g) + I₂ (g)

According to the equation, for every 2 moles of hydrogen iodide that decompose, 1 mole of iodine gas is produced. Using the ideal gas law, we can convert the volume of hydrogen iodide gas to moles:

n = PV/RT

where n is the number of moles, P is the pressure, V is the volume, R is the gas constant, and T is the temperature.

Assuming standard temperature and pressure (STP), which is 0°C and 1 atm, we have:

n(HI) = PV/RT = (1 atm) x (110 L) / (0.0821 L atm/K mol x 273 K) = 4.46 moles

Therefore, the number of moles of iodine gas produced is:

n(I2) = 4.46 moles HI / 2 moles I2 = 2.23 moles I2

Using the ideal gas law again, we can convert the number of moles of iodine gas to volume at STP:

V = nRT/P= (2.23 moles) x (0.0821 L atm/K mol) x (273 K) / (1 atm) = 49.3 L

To learn more about complete decomposition, here

https://brainly.com/question/14524445

#SPJ4

The complete question is:

How many liters of iodine gas will be produced from the complete decomposition of 110 L of hydrogen iodine​? 2HI (g) → H₂ (g) + I₂ (g)

You analyze an unknown substance and discover that it mainly contains the elements carbon, hydrogen, oxygen , and nitrogen. What is the most likely source of the substance? Explain

Answers

The most likely source of a substance containing carbon, hydrogen, oxygen, and nitrogen is a living organism, such as a plant or an animal.

This is because these four elements are the main components of organic matter, which is found in living things. Carbon is the backbone of organic molecules, while hydrogen and oxygen are also found in many organic compounds, including carbohydrates and lipids.

Nitrogen is an essential component of amino acids, which are the building blocks of proteins. Therefore, if a substance contains all four of these elements, it is likely that it was produced by a living organism or is a byproduct of a living organism's metabolism.

However, this is not always the case, as there are other sources of these elements, such as fossil fuels, which contain carbon and hydrogen, and water, which contains hydrogen and oxygen.

To know more about organic matter, refer here:

https://brainly.com/question/11165274#

#SPJ11

A 634. 5 g sample of helium absorbs 125. 7 calories of heat. The specific heat capacity of helium is 1. 241 cal/(g·°C). By how much did the temperature of this sample change, in degrees Celsius?

Answers

The temperature of the helium sample increased by 0.159 °C.

To solve this problem, we can use the equation:

q = mcΔT

where q is the heat absorbed, m is the mass of the helium sample, c is the specific heat capacity of helium, and ΔT is the change in temperature.

Substituting the given values, we get:

           q = mcΔT

125.7 cal = (634.5 g)(1.241 cal/(g·°C))ΔT

Solving for ΔT, we get:

ΔT = 125.7 cal / (634.5 g * 1.241 cal/(g·°C))

ΔT = 0.159 °C

To know more about specific heat capacity, click below.

https://brainly.com/question/22729342

#SPJ11

Many smoke detectors use americium-241 to detect very small particulates in the air. This is done by using a stream of radioactive


particles that can be stopped by the small smoke particulate. Which type of radiation is MOST LIKELY used in a smoke detector, as


it can be stopped by something this small?

Answers

The type of radiation most likely used in a smoke detector is alpha radiation.

Alpha radiation is used in smoke detectors because it can be easily stopped by small smoke particles. Americium-241, a radioactive element, emits alpha particles which ionize the air, creating a small electric current. When smoke enters the detector, it absorbs the alpha particles, disrupting the current and triggering the alarm.

Alpha radiation is ideal for this application as it has a low penetration power, meaning even small particulates like smoke can stop its travel, ensuring the detector's sensitivity to smoke. Additionally, alpha radiation poses a minimal risk to human health when contained properly within the device.

To know more about alpha radiation click on below link:

https://brainly.com/question/6070167#

#SPJ11

What is the molality of a solution containing 4. 0 grams


of NaCl dissolved in 3000 grams of water?

Answers

The molality of the solution containing 4. 0 grams of NaCl dissolved in 3000 grams of water is approximately 0.0228 mol/kg.

To calculate the molality of a solution, you can use the formula:

molality = moles of solute / mass of solvent (in kilograms).

In this case, the solute is NaCl, and the solvent is water.

The number of moles of NaCl needs to be calculated:

The atomic mass of Na (sodium) is 22.99 g/mol, and Cl (chlorine) has an atomic mass of 35.45 g/mol. Therefore, the molar mass of NaCl can be determined by adding these two values together: (22.99 + 35.45) g/mol = 58.44 g/mol. The moles of NaCl can be found by dividing the mass by the molar mass: 4.0 g / 58.44 g/mol ≈ 0.0685 moles.

Next, convert the mass of water to kilograms:
- 3000 g = 3.0 kg.

Finally, calculate the molality using the formula:
- molality = 0.0685 moles / 3.0 kg ≈ 0.0228 mol/kg.

Therefore, the molality of the solution is approximately 0.0228 mol/kg.

Know more about Molality here:

https://brainly.com/question/26921570

#SPJ11

Classify each type bifunctional molecule as being a material used in the synthesis of polyesters, nylons, both, or neither. ​
dialcohol
diester
dinitro
diacid
diamine
diether

Answers

- Dialcohol: used in polyester synthesis
- Diester: used in polyester synthesis
- Dinitrodiacid: neither polyester nor nylon synthesis
- Diamine: used in nylon synthesis
- Diether: neither polyester nor nylon synthesis


1. Dialcohol: This type of bifunctional molecule is used in the synthesis of polyesters. Polyesters are formed through the condensation reaction between a dialcohol and a diacid or diester.

2. Diester: Diesters are also used in the synthesis of polyesters. They react with dialcohols to form polyester chains.

3. Dinitrodiacid: Dinitrodiacids are not commonly used in the synthesis of either polyesters or nylons. Their nitro functional groups make them less reactive for the condensation reactions required for these polymer types.

4. Diamine: Diamines are used in the synthesis of nylons. Nylons are formed through the condensation reaction between a diamine and a diacid or a diester with a specific type of functional groups, such as adipoyl chloride.

5. Diether: Diethers are not used in the synthesis of polyesters or nylons. They lack the necessary functional groups (alcohol, ester, or amine) for the condensation reactions needed to form these polymers.

Learn more about polyesters at https://brainly.com/question/13094865

#SPJ11

Name the property that allow the filter Paper to carry out its function

Answers

The property that allows filter paper to carry out its function is known as porosity.

Porosity refers to the measure of empty space within a material, and in the case of filter paper, it allows liquids to pass through while trapping solid particles or impurities. This property is essential for filter paper to effectively perform its function in separating solids from liquids.

Filter paper is typically made from cellulose fibers that are tightly woven together to create a dense and permeable material. The porosity of the filter paper depends on the size and shape of the pores within the material.

The smaller the pore size, the finer the filtration that can be achieved, while larger pore sizes allow for faster flow rates but may not effectively trap smaller particles.

In summary, the porosity property of filter paper is what enables it to separate solid particles from liquids by allowing the liquid to pass through while trapping the particles.

To know more about porosity, visit:

https://brainly.com/question/29311544#

#SPJ11

Carbonic acid can form water and carbon dioxide upon heating. how much carbon dioxide is formed from 1.55 g of carbonic acid?
h2co3 -> h2o + co2
o 2.18 g
o 5.33 g
o 1.55 g
o 1.10 g
o 0.450 g

Answers

Answer is D)1.10 grams


From the balanced equation, we know that for every 1 mole of carbonic acid (H2CO3) that is heated, 1 mole of carbon dioxide ([tex]CO_2[/tex]) is produced. The molar mass of [tex]H_2CO_3[/tex] is 62.03 g/mol, while the molar mass of [tex]CO_2[/tex] is 44.01 g/mol.

To find out how much carbon dioxide is formed from 1.55 g of carbonic acid, we first need to convert the mass of  [tex]H_2CO_3[/tex] to moles:

1.55 g  [tex]H_2CO_3[/tex] / 62.03 g/mol  [tex]H_2CO_3[/tex] = 0.025 mol  [tex]H_2CO_3[/tex]

Since the mole ratio of [tex]H_2CO_3[/tex] to [tex]CO_2[/tex] is 1:1, we know that 0.025 moles of [tex]CO_2[/tex] will be produced.

To convert this to grams:

0.025 mol [tex]CO_2[/tex] x 44.01 g/mol [tex]CO_2[/tex] = 1.10 g CO2

Therefore, 1.55 g of carbonic acid will produce 1.10 g of carbon dioxide upon heating.

To know more about mole concept:

https://brainly.in/question/48859318

#SPJ11

suppose that you are titration a solution of hydrochloric acid of unknown concentration with a standard composed of magnesium hydroxide. it takes 14.3 ml of 1.35 m magnesium hydroxide solution to titrate a 20.0 ml solution of hydrochloric acid. what is the molarity of the hydrochloric acid solution?

Answers

The molarity of the hydrochloric acid solution is 1.93 M.

In this titration, a solution of hydrochloric acid of unknown concentration is titrated with a standard solution of magnesium hydroxide. The balanced chemical equation for the reaction is:

[tex]Mg(OH)2 + 2HCl[/tex] →[tex]MgCl2 + 2H2O[/tex]

moles HCl = moles Mg(OH)2 * (2/1)

From the problem, we know that 14.3 mL of 1.35 M Mg(OH)2 is required to titrate 20.0 mL of HCl of unknown concentration.

moles Mg(OH)2 = (1.35 mol/L) * (0.0143 L) = 0.019305 mol

Finally, we can calculate the molarity of the hydrochloric acid solution:

Molarity of HCl = moles HCl / volume of HCl solution in liters

Molarity of HCl = 0.03861 mol / 0.0200 L = 1.93 M

To know more about hydrochloric acid, here

brainly.com/question/15231576

#SPJ4

Calculate the alpha of an investment that returned 10% if the market return is 10%, the risk free rate is 2%, and the investment’s beta is 1. 1?.

Answers

The alpha of the investment is - 0.8%.

The alpha of an investment is a measure of its risk-adjusted performance. It indicates the excess return earned by the investment compared to the return predicted by the market based on its beta.

The formula to calculate alpha is:

alpha = actual return - expected return

where the expected return is the risk-free rate plus the product of the market return and the investment's beta.

Here, we are given:

actual return = 10%

market return = 10%

risk-free rate = 2%

beta = 1.1

Expected return = risk-free rate + beta * (market return - risk-free rate)

Expected return = 2% + 1.1 * (10% - 2%)

Expected return = 10.8%

Therefore, the alpha of the investment is:

alpha = actual return - expected return

alpha = 10% - 10.8%

alpha = -0.8%

The negative value of alpha indicates that the investment underperformed compared to what was expected based on its beta and the market return.

To know more about investment refer to-

https://brainly.com/question/15353704

#SPJ11

Complete Question

Blackworms were collected from an environment with an acidic pH, and the pulse rates were measured. Predict the outcome of the measurements. [2 pt] The pH of the nevironment would have no effect on pulse rate. The pulse rate would be increased to minimize the effects of acidosis. The pulse rate would be increased to minimize the effects of alkalosis. The pulse rate would be decreased to minimize the effects of acidosis

Answers

The outcome of pulse rate measurements in blackworms collected from an acidic environment will likely depend on how the blackworms respond to changes in pH and whether they experience acidosis or alkalosis as a result.

It is difficult to predict the outcome of pulse rate measurements in blackworms collected from an environment with an acidic pH without more information about the blackworms' physiological responses to changes in pH. However, it is known that changes in pH can have significant effects on the body's internal environment, leading to either acidosis or alkalosis. Acidosis occurs when the pH of the blood drops below normal, leading to an increase in acidity, while alkalosis occurs when the pH of the blood rises above normal, leading to a decrease in acidity. Both acidosis and alkalosis can affect pulse rates. In the case of acidosis, the pulse rate may increase in order to compensate for the effects of increased acidity. Conversely, in alkalosis, the pulse rate may decrease in order to minimize the effects of decreased acidity.

Learn more about acidosis https://brainly.com/question/23710507

#SPJ11

Other Questions
With all his gear, Neil Armstrong weighed 360 pounds on Earth. When he landed on the Moon, he weighed 60 pounds. Why? ________________ is the feature of forms that ensures that raters provide evidence of performance regardless of the level of performance. What's the difference between evolution and adaptation? If the pressure of a 7. 2 liter sample of gas changes from 735 torr to 800 torr and the temperature remainsconstant, what is the new volume of the gas? (6. 62 L) The observation that individuals from separate species cannot mate to produce offspring is a guideline for identifying _____. in the basic roadmap of attribute-driven design (add), which step ensures that there is clarity on the overall design problem that needs to be solved? group of answer choices choose one or more elements of the system to refine establish iteration goal by selecting drivers review inputs sketch views and record design decisions 50 POINTS MATHEMATICS READ ALL IMAGES AND ANSWER QUESTIONS. Although Zeke takes an hour walk every morning, the rest of his day is spent at his desk. When it comes to picking out a suitable snack, which would be the BEST choice for Zeke? A. a handful of almonds that total 162 calories B. a bag of potato chips that have 536 calories C. three chocolate chip cookies with 250 calories D. one piece of celery that has 10 calories jaycel runs a business selling kitchen products and buys from credit supplier, zelah. zelah allows jaycel a trade discount of 10% on the list price of orders over $5,000 and also offer a 2% cash discount if payment is made within 10 days. the following transactions took place between jaycel and zelah during the month of july 2022. jul 20 2022 balance b/d 1500c credit supplier jul 1 balance due to zelah $1,500. biz original 3 jaycel purchased goods from zelah, list price $2,600. 3312 required (a) 15 jaycel paid amount owing to zelah to date using her personal cheque. b12 20 jaycel purchased goods from zelah, list price $6,200. 812 22 jaycel returned goods to zelah, list price $700. these goods were purchased on 20 july 2022. 28 jaycel paid the balance on zelah's account by bank transfer. (b) jul 5 dr inventory 2600 (1) (ii) (trade payables-zelah 2600 trade payable-zelah prepare the account for zelah in the books of jaycel for the month of july 2022. slam the b12. name the source documents for the transactions on the following dates. 20 july 2022 22 july 2022 [6] [2] WHEN SOME PEOPLE HAVE AN UPSET STOMACH, THEY TAKE A SODA TABLET LIKETUMS TO NEUTRALIZE THEIR STOMACH ACID.THE REACTION IS HYDROCHLORIC ACID PLUS SODIUM BICARBONATE MAKES SALT,CARBON DIOXIDE (THAT'S WHY SOME PEOPLE BURP) AND WATER.HOW MUCH CARBON DIOXIDE AND SALT (IN GRAMS) ARE PRODUCED IF A 2 GRAMTABLET OF SODIUM BICARBONATE IS TAKEN TO REACT WITH 18 GRAMS OFHYDROCHLORIC ACID? Write a number that is greater than 10,910,099,999 but less than 11,000,000,000 Use the drawing tool(s) to form the correct answer on the provided graph.Plot the axis of symmetry and the vertex for this function: h(x) = (x 5)2 7 bao mom is picking him up from the ice rink she is at home which is located at the origin (0,0) how many total units is the ice rink away from the origin explain Write an email to a friend telling them about your new club.In your email, you should:explain why you decided to set up a new clubdescribe the preparations you made for your new clubtell your friend about your future plans for the club.The pictures above may give you some ideas, and you can also Your quadcopter has a terrible altitude sensor. To see how bad it really is you take many measurements with the quadcopter at 1 meter altitude. Your altitude sensor gives a mean of 1. 00 meters with a standard deviation of 13cm. The measurements are normally (Gaussian) distributed. What is the probability that your altimeter gives an error of less than 10cm for a single measurement? The flower buds seemed to materialize out of nowhere. One day the branches were bare, and the next day the buds appeared. Calculate the expected count for women who suffer from depression and drink between 2-6 cups of caffeinated coffee per week under the null hypothesis. calculate the contribution of the cell for women who suffer from depression and drink between 2-6 cups of caffeinated coffee per week to the chi-square test statistic. A random sample of size n 1 equals 31 results in a sample mean of 123. 3 and a sample standard deviation of 8. 5. An independent sample of size n 2 equals 50 results in a sample mean of 129. 8 and sample standard deviation of 7. 3. Does this constitute sufficient evidence to conclude that the population means differ at the alpha equals 0. 01 level of significance? How is it possible for a vesicle to form from one organelle and then be crazy aandactually become a part of another organelle? (Hint: what surrounds them). which has the greatest rate? y = -x , y = 3/4x +1, y = 1/2x +2, y = x