posted by joy on .
Any one there who would help me with my pr0blem!Please help me,tnx! What is the mass of carbon dioxide if 100 grams of methane is oxidized to carbon dioxide and water?
First write the balanced reaction. It is
CH4 + 2 O2 = CO2 + 2 H2O
Each mole of methane makes one mole of CO2. You start out with 100/16 = 6.25 moles of CH4, and end up with the same number of moles of CO2, which has a mass of 44 g per mole. That makes
6.25 * 44 = 275 g
To put it another way, each carbon atom ends up in a different molecule with a mass 44/16 times larger than the original molecule mass.