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Question
Translate the following statement into a chemical equation and then balance it.
Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.
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Solution
\[\ce{H2S_{(g)} + O2_{(g)} -> H2O_{(l)} + SO2_{(g)}}\]
Balanced equation:
\[\ce{2H2S_{(g)} + 3O2_{(g)} -> 2H2O_{(l)} + 2SO2_{(g)}}\]
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