Question

Certain race cars use methanol (CH 3 OH) as fuel. The combustion of 9.8 moles of methanol produces what mass of water?

Answer 1

Answer: Moles of CH3OH = 9.8 moles

The given equation for combustion of methanol is,

2 CH3OH (l) + 3 O2(g) → 2CO2 (g) + 4 H2O(l)

The moles of water can be calculated from the above balanced equation i.e 2 mol of CH3OH  on combustion forms 4 moles of H2O.

Thus the number of mole of H2O = 9.8 mol CH3OH = 20 mol H2O

Thus the number of moles of water has found to be 20 mol H2O.

Explanation: