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1 April, 21:07

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

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Answers (1)
  1. 1 April, 21:32
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    After heating the compound, it is understood that what has been released is its water content. The remaining mercuric oxide, HgO, contains 7.39% oxygen. From the given above,

    (93 grams) x (0.0739) = 6.87 grams

    The obtained value is closest to 7. Thus, the answer is letter A.
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