The number of methane molecules is 6 * 10 ^ 26. Calculate its mass.

Given:
N (CH4) = 6 * 10 ^ 26
Find: m (CH4)

Decision:
m (CH4) = M * N / Na = 16 * 6 * 10 ^ 26/6 * 10 ^ 23 = 16 * 10 ^ 3g = 16kg

Answer: 16 kg.



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