How many moles per dm² of gaseous carbon dioxide are there if 4.4g occupies 500cm³? A 0.1 mol/dm B 0.2 mol/dm³ C 2.2 mol/dm² D 8.8mol/dm³
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D Sulfur dioxide reacts with hydrochloric acid to make a salt. 18 Which solution has the lowest pH A 0.1mol/dm3 ammonia solution. B 0.1mol/dm3 ethanoic acid.
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