Question

Calculate the mass in grams of carbon needed to produce 160 g of CO2 in burning: C + O2 --> CO2

Answer 1

C + O2 ==> CO2
mols CO2 needed = grams/molar mass.
Using the coefficients in the balanced equation, convert mols CO2 to mols C.
Now convert mols C to grams. g = mols x molar mass