In antoine lavoisier’s classic experiment, mercuric oxide is heated in a sealed container. the solid red powder is changed into two products: silver liquid mercury and oxygen gas. if lavoisier heated 100 grams of powdered mercuric oxide to produce 93 grams of liquid mercury, how much oxygen would be released?

a). 7 grams
b). 16 grams
c). 32 grams
d). 93 grams

A) 7 grams

Explanation:

The chemical reaction is:

2HgO\rightarrow 2Hg + O2

Amount of HgO heated = 100 g

Molar mass of HgO = 216.59 g/mol

Molar mass of O2 = 32.00 g/mol

Moles of HgO heated =

Based on the reaction stoichiometry:

2 moles of HgO produces 1 mole of O2

Therefore, 0.462 moles of HgO would produce:

=

Molar Mass of O2 = 32 g/mol

Mass of O2 =

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