Carbon form two oxides, the first contains 42.9% C and the second contains 27.3% carbon. Show that these are in agreement with the law of multiple proportions.

Nitrogen and oxygen from two compounds. The nitrogen content of one of these is 30.43% and the other is 46.53% . Show that the data is in agreement with the law of multiple proportions.

A simple iron oxide was found to contain 72.17% iron. 2 g of the oxide from another source gave 1.44 g of iron. Show that the results illustrate law of definite proportions.

Arsenic forms two oxides, one of which contains 65.2% and the other, 75.7% of the element. Determine the equivalent weights of arsenic in both cases.

An organic compound contains 49.3 % carbon 6.84 % hydrogen and its vapour density is 73. Molecular formula of the compound is

An oxide of nitrogen contains 25.9% of nitrogen. What is its empirical formula

6.488 g of lead combines directly with 1.002g of oxygen to form lead peroxide. Lead peroxide also can be prepared by heating lead nitrate. It was found that the percentage of oxygen present in lead peroxide prepared by the second experiment is 13.38. Use this data to illustrate the law of definite proportions.