This law was proposed by Dalton in 1803 . According to this law , if two elements combune to form more than one compounds ,the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole number.
For exemple, hydrogen combines with oxygen to form two compounds ,namely, water and hydrogen peroxide.
Here, the masses of oxygen (i.e, 16g and 32g) which combine with a fixed mass of hydrogen (2g) bear a simple raio, i.e, 16 :32 or 1 :2 .
`N_(2)` and `O_(2)` combine to form a number of compounds such as `NO,N_(2)O,N_(2)O_(3),N_(2)O_(5)`. Show that these follow the law of multiple proportion.

Answer

NO (N= 14 gm, 0 = 16 gm
or
N = 28 gm, O = 32 gm )
`N_(2)O(N=14 gm,O=16gm)`
`N_(2)O_(3)(N=28gm,O=48gm)`
`N_(2)O_(5)(N=28gm,O=80gm)`
Here the masses of oxygen which combine with a fixed mass of introgen (28 gm) bears a simple ratio.