Calculate the mass of mercury (II) oxide decomposed if 16 g of oxygen were formed?

2HgO = 2Hg + O2.

It is known that Mr (HgO) = 217 g, and Mr (O2) = 32 g. Let us determine the mass of mercury oxide required for the formation of 16 g of oxygen, knowing that 32 g of oxygen is formed from 2 * 217 g of mercury oxide:

x g – 16 g

2 * 217 g -32 g.

From here we find that x = 16 * 2 * 217/32 = 217 g – the desired mass of mercury oxide.



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