Question

For the reaction C + 2H2 → CH4, how many moles of carbon are needed to make 163.7 grams of methane, CH4 ?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element

Molar Mass

Hydrogen

1

Carbon

12

Answer 1

You need 14.4 g C.

1.2 mol CH4 x (1 mol C / 1 mol CH4) = 1.2 moles of C.

1.2 mol C x (12 g C / 1 mol C) = 14.4 grams of C.