Question

in a chemical, oxygen , carbon and nitrofen are in the rate 8:5:3. If the actual amount of nitrogen is 21gm find the mass of the chemical

Answer 1

Ratio of O, C, N in a chemical compound is 8:5:3

Mass of N in it is 21g.

Let the common in the ratio be 'x'.

So, Mass of O=8x

mass of C=5x

mass of N=3x

3x=21                     ⇒x=7

So, mass of O=8*7=56

mass of C=5*7=35

mass of chemical compound=56+35+21=112g