Question

Propane (C3H8) + oxygen------> carbon dioxide + water

how many grams of carbon dioxide are produced from the reaction of 35.2 grams of propane?

Answer 1

figure all your reactions in moles and then convert what you need to grams at the end.

C3H8 + O2 --> CO2 + H2O
If we balance that equation, we get
C3H8 + 5O2 --> 3CO2 + 4H2O

so, each mole of propane produces 3 moles of CO2

Answer 2

0.25