chemical eqautions

Question

Chloroform (CHCl₃), an important solvent, is produced by a reaction between methane and chlorine.

CH₄(g) + 3 Cl₂(g)  CHCl₃(g) + 3 HCl(g)

How many grams of CH₄ is needed to produce 52.0 g CHCl₃?

Answer 1

CH₄(g) + 3 Cl₂(g) ==> CHCl₃(g) + 3 HCl(g) ... balanced equation

Using dimensional analysis:

52.0 g CHCl₃ x 1 mol CHCl₃/119.38 g = 0.4356 moles CHCl₃ produced

0.4356 moles CHCl₃ x 1 mol CH₄ / 1 mol CHCl₃ = 0.4356 moles CH₄ required

grams CH₄ required = 0.4356 mols CH₄ x 16.04 g/mole = 6.99 g CH₄ needed