Daily Practice · GCSE Science

Daily Practice - GCSE Science

16th September 1997

5 questions · GCSE · 584 questions in this band

1
Quantitative Chemistry
Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
2
Moles, Formulae and Equations
Define the limiting reactant.
3
Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
4
Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
5
Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.

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