Water (H2O) is more soluble in Ammonia (most soluble)
Nitrogen gas then follows as the next. (soluble)
Sulphur (iv) oxide is the least soluble in Ammonia.(least soluble)
If the balloon had a volume of 3 L at a depth of 50 m, what was the original volume of the balloon it we assume the pressure at the surface of the water is 14.7 psi? Express your answer using one significant figure and include the appropriate units.
If the balloon had a volume of 3 L at a depth of 50 m, the original volume of the balloon will be
What is Significant figures ?Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
The pressure at a depth of 40 m is the hydrostatic pressure of the water plus the atmospheric pressure.
The hydrostatic pressure P of a liquid is given by the formula ;
P = ρgh
where,
ρ = the density of the liquid (Density of water = 1000 kg m⁻³)g = the acceleration due to gravity (9.81 ms⁻²)h = the depth of the liquid (Given : 50 m)P = 1000 kg m⁻³ x 9.81 ms⁻² x 50 m
= 1000 kg m⁻¹ x 9.81 s⁻² x 50
= 4.9 x 10⁵ Pa
Lets's Convert Pa in to atm
= 4.9 x 10⁵ Pa x 1 / 103. 325 x 10³ Pa
= 4.7 atm
Mow, lets calculate P(atm) ;
P(atm) = 14.7 psi x 1 atm / 14.7 psi
= 1 atm
Total Pressure at 50 m is ;
P(total) = 4.7 atm + 1 atm
= 5.7 atm
Now we can apply Boyle's Law to calculate the volume of the balloon at the surface.
P₁V₁ = P₂V₂
V₂ = P₁V₁ / P₂
According to the question ;
P₁ = 5.7 atm P₂ = 1 atmV₁ = 3 LV₂ = ?V₂ = 3 L x 5.7 atm / 1 atm
= 17.1 L
= 20 L ( 1 significant figure)
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ZnS (s) + AIP(s) → AI₂S₂(s) + Zn P₂(s)
Answer:
3 ZnS (s) + 2 AIP(s) ---> AI₂S₃(s) + Zn₃P₂(s)
Explanation:
I believe you are asking for this reaction to be balanced. However, after looking more closely, those are not the products that would be created from the reactants. Assuming this is a double-displacement reaction, and taking the most common charges of the ions into consideration, the actual products would be AI₂S₃(s) + Zn₃P₂(s). I apologize if I assumed incorrectly.
For an equation to be balanced, there needs to be the same amount of each element on both sides of the equation.
The unbalanced equation:
ZnS (s) + AIP(s) ---> AI₂S₃(s) + Zn₃P₂(s)
Reactants: 1 zinc, 1 sulfur, 1 aluminum, 1 phosphorus
Products: 3 zinc, 3 sulfur, 2 aluminum, 2 phosphorus
As you can see, there is an unequal amount of each element on the reactants and products side. To balance the equation, coefficients in front of the compound(s) will be necessary.
The balanced equation:
3 ZnS (s) + 2 AIP(s) ---> AI₂S₃(s) + Zn₃P₂(s)
Reactants: 3 zinc, 3 sulfur, 2 aluminum, 2 phosphorus
Products: 3 zinc, 3 sulfur, 2 aluminum, 2 phosphorus
a student tried to balance a reaction in which iron (II) chloride reacts with potassium phosphate to produce iron (II) phosphate and potassium chloride:
FeCL^2 + K^3PO^4 —> Fe^3(PO^4)2 + KCI
Answer:
Option 1
Explanation:
You need to make the number of each type of atom on both sides the same, and this can only be done by changing the coefficients.
What is the first step in the scientific process?
O develop a test
O make a prediction about what may be happening
O observe a natural phenomenon
O generate a scientific hypothesis
O check results by repeating work
[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]
[tex]\qquad \texttt {Observe a natural phenomenon}[/tex]
____________________________________
[tex] \large \tt Explanation \: : [/tex]
At first scientists/researchers observe a natural phenomenon. after enough observation, they make predictions why that phenomenon is happening and the reasons that lead to that particular phenomenon. then they generate scientific hypothesis to explain that phenomenon and after getting enough data they develop tests and perform experiments. And check the results they get and at last based on the results they conclude what actually is happening.
Answered by : ❝ AǫᴜᴀWɪᴢ ❞
A dose of 156 mg of acetaminophen is prescribed for a 13−kg child. If one teaspoon contains 5.0 mL, how many teaspoons of Children’s Tylenol (80. mg of acetaminophen per 2.5 mL) must be administered?
Answer:
Just under 1 tsp
Explanation:
This is a situation where dimensional analysis is helpful....
156 mg / (80 mg / 2.5 ml * 5 ml / tsp ) =
156 mg / ( 160 mg/tsp) = .975 tsp ~~~ 1 tsp
If it requires 45.8 cal to melt 8.4 g of a substance, what is the heat of
fusion of the substance?
Answer:
5.452 cal/g
Explanation:
45.8 cal / 8.4 g = 5.4523 cal/g
384.72 J is the heat of fusion of the substance.
What is the heat of fusion?It is the change in the value of the enthalpy by providing energy i.e. heat, for a specific quantity of the substance.
Given data:
Heat of fusion =?
Mass of substance = 8.4 g
Unknown:
Amount of energy required to melt the given mass = 45.8 cal
Solution:
To solve this problem, the amount of energy required to melt the substance is given as;
H = m L
m is the mass
L is the heat of fusion
Insert the given parameters and solve;
H = 8.4 g x 45.8 cal = 384.72 J
Hence, 384.72 J is the heat of fusion of the substance.
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Fill in the blank with the correct number to balance the equation: 4AI +____O2 → 2Al₂O3.
(Enter only a whole number.)
Answer: 3 O2
Explanation:
4AI +____O2 → 2Al₂O3.
In the product, Al and O3 are one chemical now and therefore BOTH impacted by the coeffcient in front of the Al which is 2. We know the coefficient is 2 and there are 3 molecules of O meaning that there are 6 molecules of O in the product. To balance this, there should be 6 molecules of O on the reactant side, the same way there is 4 Al molecules on both sides of the reaction. So 6 divided by 2 is 3 so put a 3 in the blank.
One mole of hydrogen is burned in oxygen to produce water in the gas phase, H = 285.8 kJ. What is the energy change when 1 mole of water, in the gas phase, decomposes to form hydrogen and oxygen? a.142.9 kJ of heat is absorbed. b.285.8 kJ of heat is absorbed. c.142.9 kJ of heat is released. d.285.8 kJ of heat is released.
When One mole of hydrogen is burned in oxygen to produce water in the gas phase, 285.8 kJ of heat is released.Hence, option (D) is correct
What is Enthalpy change ?An enthalpy change is approximately equal to the difference between the energy used to break bonds in a chemical reaction and the energy gained by the formation of new chemical bonds in the reaction.
It describes the energy change of a system at constant pressure. Enthalpy change is denoted by ΔH.
The energy change that occurs when one mole of a compound is burnt in excess oxygen under standard bis called the standard enthalpy change of combustion.
Hence, When One mole of hydrogen is burned in oxygen to produce water in the gas phase, 285.8 kJ of heat is released.Thus, option (D) is correct
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At STP, 2.24 L of carbon dioxide gas is collected. What is the number of molecules of gas present in this volume?
a. 6.02 × 1022
c. 1.24 × 1024
e. 3.62 × 1024
b. 6.02 × 1023
d. 1.81 × 1024
Considering the definition of STP conditions and Avogadro's number, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.
Definition of STP conditionThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Definition of Avogadro's numberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of molecules of carbon dioxide gasAt STP, 2.24 L of carbon dioxide gas is collected. So, you can apply the following rule of three: if by definition of STP conditions 22.4 L are occupied by 1 mole of carbon dioxide gas, 2.24 L are occupied by how many moles of carbon dioxide gas?
[tex]amount of moles of carbon dioxide gas=\frac{2.24 Lx1 mole}{22.4 L}[/tex]
amount of moles of carbon dioxide gas= 0.1 moles
Finally, 0.1 moles of carbon dioxide gas are collected.
Then you can apply the following rule of three, considering the Avogadro's number: If 1 mole of carbon dioxide gas contains 6.023×10²³ molecules, 0.1 mole of carbon dioxide gas contains how many molecules?
amount of molecules of carbon dioxide gas= (6.023×10²³ molecules × 0.1 moles)÷1 mole
amount of molecules of carbon dioxide gas=6.023×10²² molecules
Finally, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.
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Of protons, neutrons, and electrons, the least massive particle is the electron.is it True or False
The least massive particle is the electron. Hence, the option true is correct.
What are subatomic particles?Sub-atomic particles are tiny particles of matter that together constitute an atom. There are three subatomic particles, which are namely electrons, protons and neutrons.
Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron).
Hence, the option true is correct.
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how many moles of potassium iodide (KI) are in 48.9 g of potassium iodide (KI) ? ____ moles
Answer:
mass of kI = 74.55 Atomic mass
74.55 g ---> 1 mole
48.9 g --> ?
48.9 / 72
0.7 mole.
In one mole of kI --->
Select two descriptions of this matter
Answer:
this image represents both a crystalline solid [you can tell because it is clearly a solid, and it has a tightly packed/organized into rows layout}
and a pure element [you can tell this because it is pure--meaning that it is not a mixture (which is why it's not classified as a homogenous mixture instead)]
hope this helps!
Answer:
1 and 4
Explanation:
Pure element because it is made by same type of atom.
Crystalline solid because its structure define it as a solid
Question 19 of 30
Why does Hess's law allow you to determine the enthalpy change of a
reaction?
A. It states that the enthalpy of any reaction can be determined using
a bomb calorimeter.
B. It states that the change in enthalpy is independent of the pathway
the reaction takes to get to the products.
C. It states how the equilibrium constant is related to the enthalpy
change.
D. It states that the change in enthalpy depends on the reaction
pathway between the products and the reactants.
Answer:
B.) It states that the change in enthalpy is independent of the pathway
the reaction takes to get to the products.
Explanation:
Hess's Law states that the overall enthalpy change is the sum of the enthalpy changes of all preceding steps. It does not matter how many steps there are or the type, so long as the enthalpy change of each is combined at the end, the overall change can be determined. The sequence (aka pathway) is not important.
1. Which electrons have the greatest binding energy?
a. N-shell
b. M-shell
c. L-shell
d.K -shell
Answer:
d
Explanation:
k-shell has the greatest binding energy
2 upper N upper O subscript 2 (g) right arrow 2 upper N upper o (g) plus upper O subscript 2 (g). Second: 2 upper N upper O (g) right arrow upper N subscript 2 (g) plus upper O subscript 2 (g). Third: upper N subscript 2 (g) plus 2 upper O subscript 2 (g) right arrow upper N subscript 2 upper O subscript 4 (g). What is the equation for the overall reaction obtained by adding these equations?
The equation for the overall reaction obtained by adding these equations is; 2NO₂(g) ⇒ N₂O₄(g)
How to simplify chemical equations?We are given equations;
2NO₂(g) ----> 2NO(g) + O₂(g) ---(1)
2NO(g) -----> N₂(g) + O₂(g) -----(2)
N₂(g) + 2O₂(g) ----> N₂O₄(g) -----(3)
Add eq 1 and eq 2 to get;
2NO₂(g) + 2NO(g) ⇒ 2NO(g) + O₂(g) + N₂(g) + O₂(g)
2NO will cancel out to get;
2NO₂(g) ⇒ N₂(g) + 2O₂(g) -----(4)
Add eq 3 to eq 4 to get;
N₂(g) + 2O₂(g) + 2NO₂(g) ⇒ N₂O₄(g) + N₂(g) + 2O₂(g)
This will reduce to;
2NO₂(g) ⇒ N₂O₄(g)
The correct question is;
Consider the chemical equations shown here.
2NO₂(g) ----> 2NO(g) + O₂(g)
2NO(g) -----> N₂(g) + O₂(g)
N₂(g) + 2O(g) ----> N₂O₄(g)
What is the equation for the overall reaction obtained by adding these equations?
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Answer:
A &D
Explanation:
I took it
How would one convert 15 seconds to hours?
1
A. 15 seconds x
3600 seconds
B. 15 seconds x 60 seconds
3600 seconds
1 hour
1 hour
3600 seconds
O C. 15 seconds x
OD. 15 seconds
Answer:
15 seconds x (1 hour/3600 seconds)
Explanation:
By the factor label method. There are 60 seconds in a minute and 60 minutes in an hour.
15 seconds x (1 minute/60 seconds) x (1 hour/60 minutes) = your answer
Soon enough you'll realize that 60x60=3600 and so there are 3600 seconds in 1 hour. Then you will only need 1 conversion ratio;
15 seconds x (1 hour/3600 seconds) = your answer
Answer:
15 / 3600
Explanation:
15 / 3600
D...
W...
m...
A student runs two experiments with a constant-volume "bomb" calorimeter
containing 1400. g of water (see sketch at right).
sam....
First, a 5.000 g tablet of benzoic acid (C6H5CO₂H) is put into the "bomb" and
burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of
combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from
13.00 °C to 32.28 °C over a time of 10.7 minutes.
ry Sy...
an Am...
Next, 4.900 g of ethane (C₂H6) are put into the "bomb" and similarly completely
burned in an excess of oxygen. This time the temperature of the water rises from
13.00 °C to 44.56 °C.
Use this information, and any other information you need from the ALEKS Data
resource, to answer the questions below about this reaction:
-
stirrer
Is this reaction exothermic, endothermic, or neither?
ก
thermometer
chemical reaction
"bomb"
A "bomb" calorimeter.
If you said the reaction was exothermic or endothermic, calculate the amount of heat that was
released or absorbed by the reaction in the second experiment.
2C₂H,(g) + 70₂(g) 4CO₂(g) + 6H₂O(g)
Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits.
Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values you
calculate may not exactly match published values for this reaction.
exothermic
Oendothermic
neither
water
kJ
insulation El
olo
A
0
2 C
국이
러가지
분위:
N=
ble 8.5
od Sou
tem
read, Cer
irape-Nut
loney Bun
atmeal Sq
basted Mul
ruits and Ve
Leaweed, spis
pinach, boile
feat, Poultry,
eef, plate steas
hicken, giblet
amb, liver, par
Answer:
I don't know ok sorry
What is CH3-CH3 in a compound name?
Answer:
CH3-CH3 in a compound name is Ethane
Explanation:
hope it will help you
question is hard an di do not how to satrt thank you if you can help
The number of moles of N₂ contained in the flask will be 0.607.
What is Boyle's law?According to Boyle's law, the pressure of a gas tends to drop as the capacity of the container increases. The ideal gas equation is formed from the Boyles and Charles law.
Given data,
Pressure,P= 2.86 ATM
Volume,V = 5.00 L
Universal gas constant,R= 0.08206 L atm/mol K
Temperature,T= 13.86 °C = 286.8 K
From the ideal gas equation;
PV=nRT
2.86 × 5 = n × 0.08206 × 286.8
n = 0.607 moles
Hence the number of moles of N₂ contained in the flask will be 0.607.
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Which of the following stage is also known as the unstable stage?
a.Transient creep stage
b.Constant creep stage
c.Fracture stage
d.Steady stage creep stage
Transient stage is also called the unstable stage and in this stage, there is a gradual decrease in deformation rate to a definite constant value.
What is Transient stage ?A transient state is when a process variable or variables changes, but before the system reaches a steady state.
Transient time is the time it takes for a circuit to change from one steady state to the next.
Therefore, Transient stage is also called the unstable stage and in this stage, there is a gradual decrease in deformation rate to a definite constant value.
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Hey there.
Explain JJ Thomson's model.
Thomson discovered the electron, the first subatomic particle. In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model).
J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup."
☆...hope this helps...☆
_♡_mashi_♡_
What controversial prosthetics may confer an athletic advantage over able-bodied runners?
A. Wooden prosthetics
B. Running blades
C. Myoelectric prosthetics
D. Harnessed prosthetics
Running blades is the controversial prosthetics which may confer an athletic advantage over able-bodied runners.
What is Running blade?This is also referred to as running prosthetics which allows someone move faster with less effort.
This happens when top speed has been achieved and offers an advantage over able-bodied runners.
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can you please answer it I need it now
thanks.
Answer:
1. Thermometer– It is used to measure air temperature.
2. From time to time– In 2–4hrs after sunrise, the air temperature rises the fastest. Around 1hr before sun set, the air temperature drops the fastest. The solar radiation reaches its highest value at noon.
3. Anemometer– it is used to measure wind speed and direction.
4. Direction– The wind vane originally measures the direction of the wind, but, some modern ones have wind cups attached to them, to measure the wind speed.
5. Anemometer– It is a device that measures wind speed and direction. These, days, some modern wind vanes also measure wind speed.
Explanation:
I hope this helps.
Which combination is not a buffer?
NaCN + HCN
NH3 + NH4Cl
CH3COOH + CH3COONa
NaCl + HCl
The combination in Option D , NaCl + HCl is not a buffer
What is a Buffer ?A buffer is a solution which is added to resist changes in pH when a small amount of acid.
It is generally made of weak base with its conjugated acid , weak acid with its conjugated base.
A buffer comes with a defined with a capacity .
Among the given option the solution mixture which is not a buffer is
NaCl + HCl
as a buffer is not made of a strong acid and its salt.
Therefore Option D is not a buffer.
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Define voltaic ???!!!
A voltaic cell is used to produce electrical energy with the help of chemical reactions.
What is a voltaic cell?Relating to, or producing direct electric current by chemical action.
A Voltaic Cell (also known as a Galvanic Cell) is an electrochemical cell that uses spontaneous redox reactions to generate electricity. It consists of two separate half-cells.
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Which one of the atoms shown would most likely form a cation with a charge of +1
The atom present in Option (1) most likely to form cation with a charge of +1
What is a Cation ?
A cation has more protons than electrons, consequently giving it a net positive charge.
For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them.
The atoms present in Option 1 have one eletron in its outermost shell therefore, it is easy for the atom to lose one elecron than more electron and to attain stable electronic confiuration.
Hence, The atom present in Option (1) most likely to form cation with a charge of +1
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Perform the following
mathematical operation, and
report the answer to the
appropriate number of
significant figures.
15.225 - 3.88 =
HELP! ASAP!
1. Using the model below, identify the products, reactants, and limiting reactant in the chemical reaction. Please provide an explanation of your reasoning. In addition, write the balanced chemical equation for the reaction that is taking place in the chamber.
Given the model from the question,
The products are: N₂, H₂O and H₂The reactants are: H₂ and NOThe limiting reactant is H₂The balanced equation is: 3H₂ + 2NO —> N₂ + 2H₂O + H₂Balanced equationFrom the model given, we obtained the ffolowing
Red => Oxygen Blue => Nitrogen White => HydrogenThus, we can write the balanced equation as follow:
3H₂ + 2NO —> N₂ + 2H₂O + H₂
From the balanced equation above,
Reactants: H₂ and NOProduct: N₂, H₂O and H₂How to determine the limiting reactant3H₂ + 2NO —> N₂ + 2H₂O + H₂
From the balanced equation above,
3 moles of H₂ reacted with 2 moles of NO.
Therefore,
5 moles of H₂ will react with = (5 × 2) / 3 = 3.33 moles of NO
From the calculation made above, we can see that only 3.33 moles of NO out of 4 moles given are required to react completely with 5 moles of H₂.
Thus, H₂ is the limiting reactant
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Use the graph below to answer the following question. Observe the ionization energy needed to remove the 10th and 11th electrons. What does this indicate?
The ionization energy will increase substantially when 11th electron is removed compared to when the 10th electron is removed.
What is ionization energy?Ionization energy is the energy required to remove one or more electrons from a neutral atom in its gaseous state to form a positively-charged ion.
The ionization energy increases steadily as successive electrons are removed from an atom. A substantial increase in ionization energy occurs with the removal of an electron from a filled inner shell.
The 10th electrons is the last electron in the L shell of atoms. The 11th electron is the first electron in a filled inner shell.
Therefore, ionization energy will increase substantially when 11th electron is removed compared to when the 10th electron is removed.
Note that there was no attached graph and the answer was given based on the general trend observed in ionization energies.
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Please help asap!!!!!!
Answer:
my increasing the amount of input force inorder to lift the load
