Sample Questions

1. The molar mass of iron (Fe) is 55.85 g/Mol. How many moles of atoms does 136.9 g of Fe contain?
2. A 100 g sample of pure NaCl contains 39.4 g of Na and 60.6 g of Cl. How much of each element would be found in a 250 g sample of the compound?
3. A car manufacturer claims that a hybrid car powered partly by petrol and partly by electricity can travel 2050 km on a full tank of 55 L. How far can the car go on 22 L?

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