Joseph Priestley Discovered Oxygen in 1774 by Heating Mercury(II)oxide

question 89

Multiple Choice

Joseph Priestley discovered oxygen in 1774 by heating mercury(II) oxide.The compound decomposes into its elements.How much oxygen,O₂,is produced by the decomposition of 25 g of HgO?

• A)1)8 g
• B)3)7 g
• C)5)5 g
• D)none of these

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