C2 Topic 6

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The formula of calcium carbonate is CaCO3. What is the relative formula mass of calcium carbonate ? (Relative atomic masses: C=12, Ca=40, O=16)

  • A. 68
  • B. 100
  • C. 124
  • D. 204

The Haber process is used to produce ammonia. What is the maximum mass of ammonia formed when 1.5g of hydrogen reacts completely with excess nitrogen ? (Relative atomic masses: H=1; N=14


  • A. 4.5g
  • B. 8.5g
  • C. 17g
  • D. 34g