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adell [148]
3 years ago
11

Which is the best explanation of why heat is released when

Chemistry
1 answer:
vazorg [7]3 years ago
6 0
The answers is A. Reales energy stored in chemical bonds
You might be interested in
How many neutrons does element X have if its atomic number is 31 and its mass number is 80?
MrRissso [65]

49 neutrons in each nucleus.

<h3>Explanation</h3>

For each nucleus:

Mass number = Number of protons + Number of neutrons.

The atomic number of a nucleus is the same as its number of protons. The atomic number of the nucleus here is 31. There are 31 protons in each nucleus.

  • Mass number = 80;
  • Number of protons = Atomic number = 31;
  • The number of neutrons is to be found.

Again,

Mass number = Number of protons + Number of neutrons.

80 = 31 + Number of neutrons.

Number of neutrons = 80 - 31 = 49.

5 0
3 years ago
7) Convert 8.34 x 10^-6 Kg to cg"
marusya05 [52]
The answer is .00834 cg hopefully this helped
5 0
3 years ago
How many sulfur atoms are in 3.7 mol of SO2?<br><br> × 10 S atoms
Allisa [31]

Answer: 22.3 *10^23 S atoms

Explanation:

8 0
3 years ago
What is the volume of a weather balloon that has 39 grams of helium with a density 0.017 g/mL?
olchik [2.2K]

Answer:

<h3>The answer is 235.29 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density}  \\

From the question.

density = 0.017 g/mL

mass = 4 g

We have

volume =  \frac{4}{0.017}  \\  = 235.2941176...

We have the final answer as

<h3>235.29 mL</h3>

Hope this helps you

4 0
3 years ago
The number of moles of molecules in a 12.0-gram sample of Cl2 is equal too?
Anvisha [2.4K]

it is equal theres your answer  np :)

7 0
3 years ago
Read 2 more answers
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