Question

Verify by calculating that
(a) 3 moles of CO2 and 3 moles of H2O do not have the same mass.
(b)240g of Calcium and 240g of Magnesium elements have a mole ratio
of 3:5.

Answer 1

Answer:

a CO2 has molar mass = 44g mol–1 5 moles of CO2 have molar mass = 44 × 5 = 220 g H2O has molar mass = 18 g mol–1 5 moles of H2O have mass = 18 × 5 g = 90 g b Number of moles in 240g Ca metal = 240/ 40 = 6 Number of moles in 240g of Mg metal = 240 /24 = 10 Ratio 6:10 3: 5