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08-12-2019
Chemistry

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In an experiment, a 2.514-g sample of calcium was heated in a stream of pure
oxygen, and was found to increase in mass by 1.004 g. Calculate the empirical
formula of calcium oxide.

Respuesta :

PollyP52 PollyP52

08-12-2019

Answer:

CaO.

Explanation:

The mass of Calcium is 2.514 g .and of oxygen is 1.004 g.

Dividing by their molar masses:

2.514 / 40.078 = 0.06273

1.004 / 15.999 = 0.06275

- the ratio of Ca to O is very close to 1:1 so the empirical formula is CaO.

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