C5H12 + 8 O2 → 5 CO2 + 6 H2O Using the above balanced chemical equation, how many grams of CO2 will be produced if 2.67 grams of O2 reacts completely?

Answer 1

-convert O2 to moles (molar mass of O2 is 32 g)

2.67g O2 * 1mol O2/32 g O2 = 0.0834 mol O2

-determine how many moles of CO2 can be produced from 0.0834 mol O2 (5 CO2 for every 8O2)

0.0834 mol O2*5 CO2/8O2 = 0.0521 mol CO2

-convert mol CO2 to grams CO2 (molar mass of CO2 is 44g)

0.0521mol CO2* 44g CO2/1mol CO2 = 2.294 g CO2