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fenix001 [56]
3 years ago
9

Which of the following is the best evidence for a chemical reaction?

Chemistry
1 answer:
alisha [4.7K]3 years ago
5 0
C. Formation of a new substance
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A student wants to reclaim the iron from an 18.0-gram sample of iron(III) oxide, which
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Answer:

m_{Fe}=12.6gFe

Explanation:

Hello,

In this case, since we have grams of iron (III) oxide whose molar mass is 159.69 g/mol are able to compute the produced grams of iron by using its atomic mass that is 55.845 g/mol and their 2:4 molar ratio in the chemical reaction:

m_{Fe}=18.0gFe_2O_3*\frac{1molFe_2O_3}{159.69gFe_2O_3}*\frac{4molFe_2O_3}{2molFe_2O_3} *\frac{55.845gFe}{1molFe_2O_3} \\\\m_{Fe}=12.6gFe

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3 years ago
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A nuclear reaction must lead to changes in the nucleus of an atom.

<h3>What is a nuclear reaction?</h3>

The term nuclear reaction refers to a reaction in which a new nucleus is formed. The following are the nuclear reactions;

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b) 241/95 Am ------> 237/93Np + 4/2He

c) 60/29 ----> 60/28 Ni + 0/1 e

d) 66/31 Ga + 0/-1 e -----> 66/30 Zn

Learn more about nuclear reactions:brainly.com/question/16526663

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2 years ago
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Explanation:

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3 years ago
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Force acts on it.
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