Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
14th August 2023
- 1Moles, Formulae and Equations
How many atoms are there in 0.5 mol of helium?
- 2Concentration, Yield and Atom Economy
Convert 250 cubic centimetres into cubic decimetres.
- 3Chemical Changes
Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 4Reactivity, Acids and Salts
Explain the difference between a strong acid and a concentrated acid.
- 5Electrolysis
Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
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