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How does the law of conservation of mass apply to this reaction: C2H4 + 3O2 → 2H2O + 2CO2 ?

A. Each element needs to be balanced.


B. The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.


C. Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon.


D. The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen or carbon.

2 Answers

4 votes

Answer:

Explanation:

C2H4+3O2→2H2O+2CO2

2(12)+4(1)+3(16×2)=2(1×2+16)+2(12+2×16)

24+4+96=36+88

124=124

So law of conservation of mass is verified.

User Leo Prince
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Answer: B. The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.

Explanation:

How does the law of conservation of mass apply to this reaction: C2H4 + 3O2 → 2H2O-example-1
User Andrey Ermakov
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