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Answer:
24 g of carbon
Explanation:
Methane is produced by this reaction:
C(s) + 2H₂(g) → CH₄ (g)
At STP 1 mol of any gas is contained at 22.4L. Let's see how many moles are contained at 44.8L
(1L = 1dm³)
44.8 L . 1mol / 22.4L = 2 moles
Stoichiometry at reaction is 1:1.
1 mol of methane is produced by 1 mol of carbon.
In conclussion, 2 moles of gas may come from 2 moles of C.
We determine the mass:
2 mol . 12 g /mol = 24 g