Question

water contains 88.90%oxygen and 11.10% of hydrogen,ammonia contains 82.35% of nitrogen and 17.65%of hydrogen and dinitrogen trioxide contains 63.15% oxygen and 36.85% of nitrogen . Show that these data illustrate law of reciprocal proportions.

Answer 1

Given-
17.65 g of H react with 82.35 g of N
1 g of H react with N=4.666

Similarly
11.10 g of H react with 88.90 g of O
1 g of H  react with O= 8.009

Hence ratio of masses of N and O which combine with 1 g of H
=8.009 : 4.666
=1 : 0.58

N andd O combine with each other directly in the ratio
= 63.14 : 36.85
=1 : 0.58

Thus, this data illustrate the law of Reciprocal proportion 

Answer 2

just replace the values you'll get it