Question

a compound has 20% of nitrogen by weight . If one molecule of the compound contains two nitrogen atoms, the molecular weight of the compound is​

Answer 1

Answer:

A compound has 20% of Nitrogen by weight in 1 molecule of the compound contains two nitrogen atoms the molecular weight of the compound is

A)

Let the total weight of the compound be X

Then 20% of X will be the weight of 2 nitrogen atoms = 20100×X=14×220100×X=14×2

X = 14×2×1002014×2×10020

X = 140 gm

Answer 2

Answer:

20=28/x*100

20x=2800

x=140 g

Explanation:

percentage composition =GMW/weight of the compound*100

no.of nitrogen atoms=2

GWM =2*14

=28