Use of amount of substance in relation to masses of pure substances

EasyMediumHard
123456789101112131415161718192021222324252627282930313233
Question 3
Medium

Magnesium oxide is produced by burning magnesium in oxygen gas.

The equation for the reaction is:

2Mg+O2→2MgO2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}2Mg+O2​→2MgO

Calculate the volume of oxygen gas needed to react completely with 6.0 g6.0\text{ g}6.0 g of magnesium.

You should calculate:

  • the number of moles of magnesium used
  • the number of moles of oxygen gas that react with 6.0 g6.0\text{ g}6.0 g of magnesium
  • the volume of oxygen gas needed.

Relative atomic mass (ArA_rAr​): Mg=24\text{Mg} = 24Mg=24

The volume of 1 mole of gas = 24 dm324\text{ dm}^324 dm3

[3]

Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /Use of amount of substance in relation to masses of pure substances