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LuckyWell [14K]
3 years ago
10

During which two processes does a substance release energy?

Chemistry
1 answer:
enyata [817]3 years ago
6 0

Answer:

Freezing and condensation

Explanation:

Because they are exothermic, they release energy

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Sulfur is composed of three isotopes: 32S, 33S, and 34S. The atomic masses of these isotopes are given below. 32S: 31.97207 amu
elena-14-01-66 [18.8K]

Answer:

Abundance of 32S is 94.41%

Explanation:

The average atomic mass is defined as the sum of the atomic masses of each isotope times its abundance:

Average atomic mass = ∑ Atomic mass istope*Abundance

For the sulfur:

32.07amu = 31.97207X + 32.97146Y + 33.96786*0.0422 <em>(1)</em>

<em>Where X is abundance of 32S and Y abundance of 33S</em>

Also we can write:

1 = X + Y + 0.0422 <em>(2)</em>

0.9578 - X = Y

Because the sum of the abundances = 1

Replacing (2) in (1):

32.07amu = 31.97207X + 32.97146(0.9578 - X) + 33.96786*0.0422

32.07 = 31.97207X + 31.58006 - 32.97146X + 1.43344

-0.9435 = -0.99939X

0.9441  =X

In percentage, abundance of 32S is 94.41%

3 0
3 years ago
How many grams of NaOH would be required to make 1.0 L of a 1.5 M solution
omeli [17]
60 grams are required.

Hope this helped you!
4 0
3 years ago
( WILL MARK BRAINLIEST!!!!!!!!!) What is the result of increasing the temperature of an equilibrium system in which the forward
kirill [66]

Answer:

More reactants and fewer products

Explanation:

If reaction is exothermic it add heat to the environment, so when we add more heat the reaction will move in opposite direction. So, more reactants and fewer products will be formed.

4 0
4 years ago
Single replacement: Zn(s) HCl(aq)→ _____ _____ Express your answer as a chemical equation. Your answer does not need to include
irinina [24]

Answer:

Zn + 2 HCl → ZnCl₂ + H₂

Explanation:

We have to complete this single replacement reaction.

Zn(s) + HCl(aq) →

We need to decide if Zn will replace H⁺ or Cl⁻. Zn can form the cation Zn²⁺ but it does not have a negative oxidation number to form an anion. As a consequence, the cation Zn²⁺ will replace the cation H⁺ to form ZnCl₂. H₂ will be released as a gas.

Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)

3 0
4 years ago
I WILL MARK THE BRAINILEST As a roller coaster goes down hill,
PIT_PIT [208]

Answer:

4: B

5: C

6: B

Explanation:

4 0
3 years ago
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