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.

Question

Chemistry

Fatima Berry

26 March, 10:51

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.

+4

Answers (1)

Know the Answer?

Santos Powell · Answer 1

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.

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

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.