3. Given the reaction: C3Hs +5 3 CO2 + 4H2O
What is the total nuunber of moles of O2 required to
produce 1.5 moles of CO2?
A) 1.5 B) 2.5 C) 3.0 D) 5.0

A balanced chemical equation is a ratio: this one shows that for every 5 moles O2, 3 moles CO2 are produced. Since there's a 5:3 ratio of O2/CO2.

((5 m O2)/(3 m CO2)) * 1.5 m CO2 = 2.5 m
O2.

Answer B.

Rethink and reinvent

Variables,control,conclusion and finally scientific theory