Which equation is balanced?

A) N23H2 + H2 --> 2NH4
B) AgI + Na2s --> Ag2S + 2NaI
C) CH4 + Cl2 --> CCL4 + HCl
D) Fe2O3 + C --> Fe + CO2

2 answers

Tell me why you're having a problem answering this question. To be balanced, you must have the same number of an element on each side of the equation. Just count. For example,
C) CH4 + Cl2 --> CCL4 + HCl
1 C on the left and 1 on the right. OK. 4 H on the left and 1 on the right. not balanced. 2 Cl on the left and 5 on the right. not balanced.
D) Fe2O3 + C --> Fe + CO2
2 Fe on the left and 1 on the right. not balanced. 3 O on the left and 2 on the right. not balanced. C is balanced.
To be balanced you must have EACH element the same on left and right. If any ONE element is not balanced then the entire equation is not balanced.
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