Chemistry
A gaseous compound of nitrogen and hydrogen contains 12.5% hydrogen by mass. Find the molecular formula of the compound if it's relative molecular mass is 37.
[N =14, H = 1].
Stoichiometry
27 Likes
Answer
| Element | % composition | At. wt. | Relative no. of atoms | Simplest ratio |
|---|---|---|---|---|
| Nitrogen | 100 - 12.5 = 87.5 | 14 | = 6.25 | = 1 |
| Hydrogen | 12.5 | 1 | = 12.5 | = 2 |
Simplest ratio of whole numbers N : H = 1 : 2
Hence, empirical formula is NH2
Empirical formula weight = 14 + 2(1) = 16
Relative molecular mass = 37
∴ Molecular formula = n[E.F.] = 2[NH2] = N2H4
Answered By
11 Likes
Related Questions
A compound contains — Carbon 14.4%, hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. Work correct to 1 decimal place. The relative molecular mass of this compound is 168, so what is it's molecular formula?
[C = 12; H = 1; Cl = 35.5]
An organic compound has vapour density 94. It contains C = 12.67%, H = 2.13%, and Br = 85.11%. Find the molecular formula of the organic compound.
[C = 12, H = 1, Br = 80]
What is the empirical formula of octane (C8H18)
A compound having empirical formula X2Y is made of two elements X and Y. Find it's molecular formula if the atomic weight of X is 10 and that of Y is 5 and the compound has a vapour density 25.