A sample of an oxide of vanadium weighing 4.589 g was heated with hydrogen gas to form water and another oxide of vanadium weighing 3.782 g. The second oxide was treated further with hydrogen until only 2.573 g of vanadium metal remained.
(a) What are the simplest formulas of the two oxides?
(b) What is the total mass of water formed in the successive reactions?
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