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.

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.

answer; /// i do believe that the correct answer is (c)nuclear bond

answer: c.

explanation: