For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 7.9 moles of methane, CH4 ?

Question

For the reaction C + 2H₂ → CH₄, how many grams of hydrogen are required to produce 7.9 moles 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

C + 2H₂ → CH₄ ... balanced equation

This is the same as your previous question, so I'll just plug in the numbers. You can see the explanation given in the answer to your previous question.

7.9 mols CH₄ x 2 mols H₂ / mol CH₄ x 2 g H₂ / mol H₂ = 31.6 g H₂ required