Worksheet: Reaction Masses from Formula Masses

In this worksheet, we will practice using the relative formula masses of reactants and products to convert between their masses and their molar quantities.

Q1:

How many grams of oxygen gas are necessary to react completely with 2 . 9 3 × 1 0 atoms of magnesium to yield magnesium oxide?

  • A 6 . 1 8 × 1 0 g
  • B 2 . 4 4 × 1 0 g
  • C 7 . 7 8 × 1 0 g
  • D 0.156 g
  • E 2 . 6 8 × 1 0 g

Q2:

Chlorine gas is produced industrially by the electrolysis of molten or aqueous sodium chloride. What mass of chlorine can be produced from 3.00 kg of sodium chloride?

Q3:

What mass of hydrogen is produced when 10.01 g of calcium reacts completely with water?

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