A: 10
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A drop of liquid bromine is placed in the bottom of a gas jar. Brown fumes of bromine vapour slowly spread through th…
Which statement about both chlorine atoms and chloride ions is correct?
An atom, X, contains 16 protons. Which statement about X is correct?
Ammonia is made by a reversible reaction between nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = −92 kJ/mol What…
Aqueous copper(II) sulfate is electrolysed using copper electrodes. The current is constant and the anode (positive e…
In the extraction of aluminium by electrolysis, its oxide is dissolved in molten cryolite. Cryolite is a sodium salt.…