Daily Practice

GCSE Science

13th August 1979

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
How many atoms are there in 0.5 mol of helium?
2
Concentration, Yield and Atom Economy
Convert 250 cubic centimetres into cubic decimetres.
3
Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
4
Reactivity, Acids and Salts
Explain the difference between a strong acid and a concentrated acid.
5
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.

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