Question

Verify (a) five moles of carbon dioxide as higher mass then five moles of water

Answer 1

1. Find the molar mass of each of the molecules
    CO2 = 12g + 2(16g) = 44g
    H2O = 2(1g) + 16g = 18g
2. Apply the formula: Mass = No. of moles x Molar Mass
    Mass of CO2 = 5 x 44g = 220g
    Mass of H2O = 5 x 18g = 90g

220g>90g and thus the mass of five moles of CO2 > the mass of five moles of H2O.