Ammonia contains `82.35%` of nitrogen and `17.65%` of hydrogen. Water contains `88.90%` of oxygen . Nitrogen trioxide contains `63.15%` of oxygen and `36.85%` of nitrogen. Show by calculations from these data which law of chemicmal combination is verified.

Explanation

a. Ammonia contains
`N = 82.35` parts, `H = 17.65` parts
Now, the weight of nitrogen that combines with 1 part by ltbr weight of `H` in `NH_(3) = (82.35)/(17.65) = 4.67`
b. Water contains
`H = 11.10`, parts, `O = 88.90` parts
weight of oxygen that combines with 1 part by weight of `H` in `H_(2)O = (88.90)/(11.10) = 8.01`
In the two compounds `NH_(3)` and `H_(2)O`, weight of nitrogen and oxygen that combine with the same weight, i.e., 1 part by weight of hydrogen, are in the ratio of `4.67 : 8.01` or `1 : 1.71` (ratio I).
c. Nitrogen trioxide contains
`N = 36.85, O = 63.15`
In the compound, the ratio of the weight of nitrogen to oxygen is `36.85 : 36.15`1 or `1 " 1.71` (ratio II).
Ratio (I) and (II) being the same these data illustrate the validity of the law of reciprocal proportion.