Answer:
it all really depends on the superiors of the government. everyone's so corrupt with their views these days, and let personal opinions rules over what the people want. as a latina, i think we should keep fighting and protesting till we get what we really deserve.
Explanation:
The ____ contains the highest concentration of ozone. (troposphere (exosphere ( stratosphere ( mesosphere
Answer:
the answer is stratosphere.
about 90% of ozone is found in the stratosphere.
How do you solve this
Answer:
23.6°C
Explanation:
Step 1:
Data obtained from the question. This include the following:
Mass = 0.125kg = 0.125 x 1000 = 125g
Initial temperature (T1) = 22°C
Heat (Q) generated in 4.5mins = 835J
Specific heat capacity (C) of water = 4.184J/g°C
Change in temperature (ΔT) =?
Final temperature (T2) =?
Step 2:
Determination of the change in temperature, ΔT of water.
This can be obtained as shown below:
Q = MCΔT
835 = 125 x 4.184 x ΔT
Divide both side by 125 x 4.184
ΔT = 835 / (125 x 4.184)
ΔT = 1.6°C
Therefore, the change in temperature, ΔT is 1.6°C
Step 3:
Determination of the final temperature of water.
This can be obtained as follow:
Initial temperature (T1) = 22°C
Change in temperature (ΔT) = 1.6°C
Final temperature (T2) =?
Change in temperature (ΔT) = Initial temperature – Final temperature
ΔT = T2 – T1
1.6 = T2 – 22
Collect like terms
T2 = 1.6 + 22
T2 = 23.6°C
Therefore, the final temperature of the water is 23.6°C.
what is the mass of 3.01x1023 atoms of iron(atomic mass of fe=56)
Answer:
N = n× l
N = number of entities
n= moles
l = Avogadro's constant = 6.023 × 10^23
3.01 × 10^ 23 = n * 6.023 × 10^23
n = 3.01 × 10^23/6.023 × 10^23
n= 0.5moles
Molar mass = mass/ number of moles
Molar mass = 56
mass = 56 × 0.5
= 28g
Hope this helps.
Propenoic acid is an unsaturated carboxylic acid. Describe how you could show
that it is an unsaturated compound giving details of the test and the result.
Answer:
Tests for unsaturation involves addition across the multiple bonds in the unsaturated compound.
Explanation:
In organic chemistry, we define an unsaturated compound as any compound that contains a double or triple bond. These multiple bonds are also known as pi bonds.
There are two major tests for unsaturation which shall both be discussed here.
The first test for unsaturation is by the use of bromine water. The unknown sample is passed through a solution of bromine water which normally appears reddish brown. The bromine water becomes decolorized due to addition of bromine across the multiple bond. This is a standard test for unsaturation.
Secondly, unsaturated compounds decoulourize a solution of potassium permanganate when passed through it. This alone can not be used as a distinctive test for unsaturation.
Propenoic acid will give a positive test to the both reagents showing that it contains multiple bonds, in this particular instance, a double bond.
50 points - I need this really soon! plz help
The pictured compound has which bond?
A.) C = C and C −C
B.) C = C and C −H
C.) C −Cand C −H
D.) C −C, C −H, and C −O
Answer:
C.
Explanation:
Butane (C4H10) has 3 C-C bonds in the carbon chain and 10 C-H bonds
Butane ([tex]C_4H_10[/tex]) has 3 C-C bonds in the carbon chain and 10 C-H bonds
What is alkane?Alkanes are saturated hydrocarbons. This means that their carbon atoms are joined to each other by single bonds.
Based on the diagram, butane is considered to be an alkane. It not only contains single covalent bonds, but also has carbon and hydrogen atoms present in its structure.
When comparing both structures to one another, isobutane is a branched chain, while butane is a linear chain.
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Which ion can be both an oxidizing agent and reducing agent?
A) Sn2+
B) Cu2+
C) Al3+
D) Fe3+
Answer: a) Sn 2+
Explanation:A reducing agent is a substance that can be oxidized when it loses electrons while An oxidizing agent is a substance that is reduced when it gains electrons.
Considering Cu 2+, Fe 3+, Al 3+, Here, Cu 2+ can be reduce to its Copper metal, same for Al 3+ to Aluminium metal and Fe 3+ to Fe 2+ ion and will not be oxidized further since they are in their most oxidized states. The three ions are acting as only oxidizing agents.
while Sn 2+ can be oxidized to become Sn 4+ and also be reduced to become Sn metal acting as a reducing agent and an oxidizing agent.
What is the voltage of an electrolytic cell with copper and magnesium
electrodes?
A. 2.71 V
B. -2.71 V
C. 2.03 V
D. -2.03 V
Answer:
A. 2.71 V
Explanation:
The standard reduction potential, E° of the metals are as follows:
Mg²⁺ + 2e⁻ ⇌ Mg; E° = -2.372
Cu²⁺ + 2e⁻ ⇌ Cu; E° = +0.337
Since magnesium has the the lower E°, it will serve as the anode in the electrolytic cell while copper will serve as the cathode.
At the anode; Mg ⇌ Mg²⁺ + 2e⁻, E° = -2.372
At the cathode; Cu²⁺ + 2e⁻ ⇌ Cu, E° = +0.337
EMF of the cell = E° cathode - E° anode = 0.337 - (-2.372) = 2.71 V
Therefore, EMF of the cell is 2.71 V
Answer:-2.71 is the correct answer
Explanation:
A P E X
During chemical reactions the bonds between atoms break and new bonds form.
Energy must be absorbed to break a bond, so breaking bonds is endothermic.
Making new bonds is exothermic because energy is released.
a) When green copper carbonate decomposes, the equation is:
CuCO3 CuO CO2
copper carbonate copper oxide carbon dioxide
Is the reaction exothermic or endothermic? Use ideas about bonds to explain why.
Answer:
The equation is CuCO₃ ⇆ CuO + CO₂. So it's a decomposition reaction, so a solid broke down into two other substances. This means that bonds were broken, so the reaction must be endothermic.
How do forces between particles in solids compare to forces in the other
states of matter?
O A. The forces in solids are stronger than forces in liquids and gases.
O B. The forces in solids are weaker than forces in liquids and gases.
O C. The forces in solids are stronger than forces in liquids but weaker
than forces in gases.
D. The forces in solids are weaker than forces in liquids but stronger
than forces in gases.
Answer:
the answer is A
Explanation:
Forces are the intermolecular interaction between the matter. Forces present in a solid are strongest. Thus, option A is correct.
What are the phases of matter?The matter is any substance that occupies a volume. Matter can be a solid, gas, or liquid. The solid phase particles are tightly closed to each other making the force strong.
The particles of liquids that are not too compact are a little free and in gases, the particles are very free, which makes the bonding and the force the weakest.
Therefore, option A. the solids have the strongest intermolecular bonding.
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Of the reactions listed below, which one is NOT a combination reaction? A) C + O2 => CO2 B) 2Mg + O2 => 2MgO C) 2N2 + 3H => 2NH3 D) CaO + H2O => Ca(OH)2 E) 2CH4 + 4O2 => 2CO2 + 4H2O
Answer:
E
Explanation:
A combination reaction is one in which two elements or two compounds react to give a new single compound
Hence, what we are expecting on the reactant side is only a single product and not a mixture of products
For the first reaction, we had two elements giving a single product
For the second reaction, we had same
For the third, we had same
For the fourth, we had two compounds reacting to give a singe new product
While in the last, we had two different products which means it does not follow the definition of a combination reaction and that makes it our answer
True Or False? A Load In A Circuit Transforms Light Energy Into Electrical Energy
Answer:
False
Explanation:
This is because the electrical circuit, where the electrical energy is converted into another form of energy, e.g. lightbulb converts electrical energy into light and heat, an electric bell converts the electrical energy into sound and heat.
False.
The statement a load in a circuit transforms the light energy into electrical energy is False.
What is a load in the circuit?Any device which transforms the electrical energy into other forms of energy, like light energy, sound energy, etc is called an electric load in the circuit.
What is electrical energy?The type of kinetic energy caused by moving electric charges is known as electrical energy. The alternating current, direct current, and batteries provide electrical energy.
So, the load transforms the electrical energy into other forms like light energy, sound energy, etc.
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ANSWER IT CORRECTLY PLEASE!!
The Osmotic pressure of blood is 7.65 ATM at 310 k. An aqueous solution of glucose is isotonic with blood has the percentage by volume
a.5.41%
b.3.54%
c.4.53%
d.53.4%
Answer:
Explanation:
Pv = n RT
P =7.65, T= 310K, for glucose n = moles= weight/molar mass= weight/180, R is gas constant
7.65* V =W/180 *0.0821 * 310
w/v= 7.65*180/0.0821*310 = 1377/25.45 = 54.10 =5.4%
The density was of a solution of sulfuric acid is 1.285g/cm3 and it is 38.08% (by weight) acid. How many millimeters of the acid solution do you need to supply 125 grams of sulfuric acid?
Answer:
255.5cm³
Explanation:
A solution that is 38.08 % by weight has 38.08g of sulfuric acid per 100g of total solution. Thus, mass of solution you need to obtain 125g is:
125g H₂SO₄ × (100g solution / 38.08g H₂SO₄) = 328.3g of solution
As density of the solution is 1.285g / cm³, the volume of 328.3g is:
328.3g × (1cm³ / 1.285g) = 255.5cm³
What are the two ways that humans lose heat? PLS help thank you!
Answer:
Evaporation, Radiation
Explanation:
Evaporation of water from your skin if it is wet (sweating). ...
Radiation (similar to heat leaving a woodstove).
Name the following 3 structural formulas correctly, in order from left to right
Answer:
1. Methyl propanoate.
2. Propanol.
3. 2–pentyne
Explanation:
1. The functional group in this case is ester. We name ester by naming the group after the functional group (–COO) then followed by the parent compound with the name ending with –oate.
The group after the functional is methyl i.e —CH3.
The parent compound has 3 carbon i.e propane. The functional group replaces the –e in propane with –oate.
Therefore, the name of the compound is:
Methyl propanoate.
2. In this case the functional group is
–OH i.e alcohol.
The compound has 3 carbon i.e propane. The functional group replaces the –e in propane with –ol.
Therefore, the name of the compound is:
Propanol.
3. The triple bond represents the functional group in this case i.e alkyne. We'll give the triple bond the lowest low count by counting from the left. The triple bond is at carbon 2.
The compound has 5 carbon i.e pentyne since it contains triple.
The name of the compound is:
2–pentyne
I NEED HELP PLEASE, THANKS! :)
A manufacturing company is trying to produce a lightweight but strong cart for use by home gardeners. Which metal—titanium (Ti), iron (Fe), or zinc (Zn)—would be the best for this application and why?
Answer:
Titanium; lowest density
Explanation:
The cart would use the same volume of metal, no matter which one it was made of.
If weight were the only consideration, the company would choose the metal with the lowest density.
The values I find for the metals are
Ti 4.5 g/cm³
Fe 7.9 g/cm³
Zn 7.1 g/cm³
Titanium would be the best metal for this application.
Answer:
Titanium would be the best metal for this application because it is a low density metal that is still strong and ductile
Explanation:
An elements mass number is made up of the number of ____ in the nucleus.
protons and neutrons
electrons and neutrons
protons and electrons
atoms and molecules
Answer:
The answer is protons and nuetrons
Explanation:
Lulu Labwrecker carefully pipets 25.0 mL of 0.525 M NaOH into a test tube. She places the test tube into a small beaker to keep it from spilling and then pipets 75.0 mL of 0.355 M HCl into another test tube. When Lulu reaches to put this test tube of acid into the beaker along with test tube of base she accidentally knocks the test tubes together hard enough to break them and their respective contents combine in the bottom of the beaker. Is the solution formed from the contents of the two test tubes acidic or basic? What is the pH of the resulting solution?
Answer:
The solution formed is acidic
pH = 0.87
Explanation:
The acid-base reaction of NaOH with HCl is:
NaOH + HCl → NaCl + H₂O
Where 1 mole of NaOH reacts with 1 mole of HCl
In the problem, moles of NaOH and HCl are:
NaOH: 0.0250L × (0.525mol / L) = 0.013125 moles NaOH
HCl: 0.0750 × (0.355mol / L) = 0.026625 moles HCl
As moles of HCl > moles NaOH, HCl is in excess and the solution formed is acidic
Moles in excess of HCl are:
0.026625 moles - 0.013125 moles = 0.0135 moles HCl
As the volume of the solutions is 25.0mL + 75.0mL = 100.0mL = 0.100L, molarity of HCl after reaction is:
0.0135 moles HCl / 0.100L = 0.135M HCl = 0.135M H⁺
As pH is defined as - log [H⁺], pH of the solution is:
pH = -log 0.135M H⁺ = 0.87
pH = 0.87
The pH of the resulting solution of the acid and base mixture is; Acidic with a PH = 0.87
We are given;
Volume of NaOH = 25 mL = 0.025 L
Volume of HCl = 75 mL = 0.075 L
Concentration of NaOH = 0.525 M
Concentration of HCl = 0.355 M
Total volume of solution = 0.025 + 0.075 = 0.1 L
Now, the the equation of the reaction is;
HCl + NaOH = NaCl + H2O
We can see that 1 mole of HCl reacts with 1 mole of NaOH.
Since; number of moles = Volume × concentration
Number of moles of HCl = 0.075 × 0.355
Number of moles of HCl = 0.026625 moles
Similarly;
Number of moles of NaOH = 0.025 × 0.525
Number of moles of NaOH = 0.013125 moles
We can see that the number of moles of HCl is greater than that of NaOH and as such there is excess HCl acid in the mix.
Thus,
Excess moles of HCl acid = 0.026625 - 0.013125
Excess moles of HCl acid = 0.0135 moles
Concentration of this excess HCl is gotten by the formula;
M = Excess moles/total volume
M = 0.0135/0.1
M = 0.135 M
PH of this excess concentration is;
PH = -log [H+]
PH = -log [0.135]
PH = 0.87
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What type of mixture is fog?
O A. A homogenous mixture of a solid in a gas
B. A heterogeneous mixture of a liquid in a gas
C. A homogenous mixture of a liquid in a gas
D. A heterogeneous mixture of a solid in a gas
Answer:
. A homogeneous mixture of a solid in a gas
Identify what is in that photo please!! (10 pts)
Answer:
Electromagnet
Explanation:
the force that keeps the nucleons bound inside the nucleus of an atom
Answer:
Strong Nuclear Force
Explanation:
Strong Nuclear Force; is the force that keeps the nucleons bound inside the nucleus of an atom. It is a short range attractive force that acts between all nucleons in the nucleus of the atom that is much stronger than electrical forces.
Answer:
nuclear force
Explanation:
What is the half-life of a radioisotope if a 50-g sample becomes 25 g after 18
days?
O A. 25 days
O B. 9 days
O C. 50 days
O D. 18 days
Answer:
18 DAYS IS THE HALF LIFE OF THE RADIOISOTOPE.
Explanation:
Using the formula
Nt = No * (1/2)^t/t1/2
where;
Nt = amount remaining = 25 g
No = Initial amounrt of the radioisotope = 50 g
t = time elapsed = 18 days
t1/2 = half life = unknown
Substitute the values into the equation and obtain the half life of the radioisotope;
Nt = No * (1/2) ^t/t1/2
25 = 50 * (1/2) ^18/t1/2
25 /50 = (1/2)^18/ t1/2
1/2 = (1/2)^18/t1/2
1/2)^1 = (1/2)^18/t1/2
1 = 18/t1/2
t1/2 = 18 days.
So therefore the half life of the radioisotope is 18 days.
Answer:
18 days
Explanation:
Did it on A pex
(c)
Suggest a reason why substance E does not conduct electricity in both solid and
molten states.
Answer:
Substance E does not conduct electricity in both solid and molten states because of very low melting and boiling points.
In both solid and molten state free electrons are required to conduct electricity. substance E has low boiling and melting point which means substance will have relatively weak bonds. Because of weak bonds substance E might not have much free electron in its outermost shell that can cause the electric current by their coordinated movement.
Hence, substance E is unable to conduct in both melting and molten state.
Consider the incomplete reaction below.
NaOH + X Right arrow. NaCH3COO + H2O
What is X in this reaction?
NH4OH
H3PO4
H2CO3
CH3COOH
A chemical reaction involves the interaction of reactants. The substance X ,must be an acid and in this case is CH3COOH
What is a reaction?In chemistry, a reaction is said to occur when substances interact in such a way that other new substances are formed.
Now let us look at the particular reaction; NaOH + X ----> NaCH3COO + H2O. The substance X must be an acid. Hence, the most likely susbstance is CH3COOH.
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A 315-mL bag of potato chips is packaged at sea level (1.00 atm) where the temperature is 25oC. If this bag of chips is transported to Denver (where the pressure is 0.775 atm and the temperature is 18oC), what will the new volume of the bag be?
Answer:
THE NEW VOLUME AT A PRESSURE OF 0.775 atm AND TEMPERATURE OF 18 °C IS 0.397 L
Explanation:
Using the combined gas equation
P1V1/T1 = P2V2/ T2
P1 = 1 atm
VI = 315 mL = 315 / 1000 L = 0.315 L
T1 = 25°C 25 + 273 K = 298 K
P2 = 0.775 atm
T2 = 18 °C = 18 + 273 K = 291 K
V2 = Unknown
Substituting the values into the equation, we obtain:
V2 = P1V1 T2/ P2 T1
V2 = 1 * 0.315 * 291 / 0.775 * 298
V2 = 91.665 / 230.95
V2 = 0.3969 L
The new volume at the given change in conditions is 0.397 L
Write down as many as you can uses for liquid crystall
Answer:
The most important use of liquid crystals is in displays because the molecules of a liquid crystal can control the amount, color, and direction of vibration of the light that passes through them. hope that helps love!
PLSSS HELPPP MEEE WITH THIS QUESTIONNNNN NO GUESSING PLSSSS
Which process is shown in the plant cell below?
A= cell growth
B= cell reproduction
C= metamorphosis
D= photosynthesis
Answer:
B
Explanation:
Well, the cells are going through mitosis, which means that when the divide, they are going to be identical sister cells. Anyways, they are
Consider the equations below.
H₂ → 2H
CHA+HC2H5
C2H5 + HC2H6
When these equations are added together, what will the overall equation be?
C₂H4+H₂C₂H
H2 + CH4 + 2H + C2H5+ → 2H + CH3 + CHE
C2H4 +C2H4 + H2>C2H5 + C2H5
Answer:
a
Explanation:
The overall equation is [tex]C_2H_4 + H_2 ---- > C_2H_6[/tex].
What is Chemical Equation?A chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols and formulas, in which reactant elements are given on the left and product units on the right.
For example,
[tex]NaOH+ HCl ---- > NaCl+ H_2O[/tex]
In this, reactants are converted to products which is symbolized by a chemical equation. For example, iron (Fe) and sulfur (S) combine to form iron sulfide (FeS).
Fe(s) + S(s) → FeS(s)
here, the plus sign indicates that iron reacts with sulfur.
Thus, the overall equation is [tex]C_2H_4 + H_2 ---- > C_2H_6[/tex].
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7) Put the following molecules in order of where they would be found in the fractional distillation
column (from bottom to top). Hexane, Octane, Ethane, Dodecane, Decane, Methane
FAST
Answer:Crude oil is a mixture of many saturated hydrocarbons. They can be separated into fractions by the process of fractional distillation.
Explanation:
explain why we must balance all chemical equations
Answer:
The chemical equation needs to be balanced so that it follows the law of conservation of mass.
Explanation:
Explanation:
the chemical equation needs to be balance so that it follows the law of conservation of mass. a balance chemical equation occurs when the number of the different atoms of elements to the reactants side is equal to that of the product side. balancing chemical equation is a process of trial and error .
