Question

Given the reaction: 2C3OH(g) + 3O2(g) → 2CO2(g) + 4H2O(g) , how many moles of O2(g) needed to produce exactly with 20. mole of CO2(g)?

Answer 1

You can use a proportion with the mole ratios

20molesCO2/2molesCO2=XmolesO2/3molesO2

x= 30 moles