CH4 + 2O2 --> CO2 + 2H2O

Question

a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide?

b. How many grams of oxygen are needed to react to form the 1.5 X 10^-2 grams moles of carbon dioxide?

Answer 1

a.
mols CO2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols CO2 to mols CH4.
Now convert mols CH4 to grams. g = mols x molar mass = ? g CH4.

b doesn't make sense. grams mols???