Amounts of Substances

Test yourself on Amounts of Substances

• 2Na + Cl₂ → 2NaCl
  A chemist has run out of table salt (NaCl) and needs 0.1 moles of it to make dinner.
  How many moles of chlorine does he need?

•            2Na + H₂SO₄ → Na₂SO₄ + H₂
  
  Calculate the mass of each of the substances given that there is 0.1 moles of sodium. You will need to know some relative masses:
  
             Ar (Na) = 23
             Mr (H₂SO₄) = 98
             Mr (Na₂SO₄) = 142
             Mr (H₂) = 2