The combustion of propane may be described by the chemical equation

C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g)

How many grams of O2(g) are needed to completely burn 12.3 g C3H8(g)?

1 answer

the coefficients in the reaction equation are moles

5 moles of O2 are needed to burn 1 mole of C3H8

find the number of moles in 12.3 g of C3H8