Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. the mass of hydrogen that combines with 1.00 g of nitrogen for each compound is 1.44 3 1021 g, 2.16 3 1021 g, and 2.40 3 1022 g, respectively. show how these data illustrate the law of multiple proportions.

Given the following:

hydrazine                 1.44 3 1021 g h/g n
ammonia                 2.16 3 1021 g h/g n
hydrogen azide       2.40 3 1022 g h/g n

let’s try all of the ratios:

0.144/0.0240           = 6.00
0.216/0.0240           = 9.00
0.0240/0.0240         = 1.000.216/0.144 =1.50 = 3/2

all the masses of hydrogen in these three compounds can be expressed as simple whole number ratios. the g h/g n in hydrazine, ammonia and hydrogen azide are in the ratios 6: 9: 1

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