Given the atomic weight of Fe is 56 and that of C is 12,

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Given the atomic weight of Fe is 56 and that of C is 12, the weight percentage of carbon in cementite (Fe₃C) is _______.

1. 68.7%
2. 66.7%
3. 70.7%
4. 96.7%

Correct Option: B

Weight percentage of carbon in cementite

12	× 100 = 66.7%
56.3 + 12 × 1