A compound contain $49.2 %$ Carbon, $9.68 %$ Hydrogen, $19.9 %$ Nitrogen. The molar mass of the compound is 146. Find the molecular formula of the compound.

Open in App

Solution

Divide all the percentages with atomic mass,
Carbon 49.2 $\frac{49.2}{12} = 4.1$ $3$
Hydrogen 9.68 $\frac{9.68}{1} = 9.68$ $9$
Nitrogen 19.9 $\frac{19.9}{14} = 1.4$ $1$
Oxygen 21.22 $\frac{21.22}{16} = 1.3$ $1$
Empirical formula will be $C_{3} H_{9} N O$
(Emperical formula wt) $_{n} = 146$
$(75)_{n} = 146$ or $n = 2$ ,
Molecular will be $C_{6} H_{18} N_{2} O_{2}$

Suggest Corrections

Similar questions

A compound contain

12.8 %

Carbon,

2.1 %

Hydrogen,

85.1 %

Bromine. The molecular mass of the compound is 188. Find the molecular formula of the compound.

Q. An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.

Q. A carbon compound contains 12.8% carbon, 1% hydrogen, 85.1% bromine by mass. The molecular weight of the compound is 187.9. Calculate its molecular formula.

Q. A gaseous compound of nitrogen and hydrogen contains

12.5

% (by mass) of hydrogen. The density of the compound relative to hydrogen is

16

. The molecular formula of the compound is:

An organic compound contains 4.7% hydrogen, 71.65% chlorine and remaining carbon. Its molar mass is 98.96% find its,
(a) Empirical formula (b) Molecular formula

Join BYJU'S Learning Program

Carbon	49.2	$\frac{49.2}{12} = 4.1$	$3$
Hydrogen	9.68	$\frac{9.68}{1} = 9.68$	$9$
Nitrogen	19.9	$\frac{19.9}{14} = 1.4$	$1$
Oxygen	21.22	$\frac{21.22}{16} = 1.3$	$1$

A compound contain 49.2% Carbon, 9.68% Hydrogen, 19.9% Nitrogen. The molar mass of the compound is 146. Find the molecular formula of the compound.

Divide all the percentages with atomic mass, Carbon 49.2 49.212=4.1 3 Hydrogen 9.68 9.681=9.68 9 Nitrogen 19.9 19.914=1.4 1 Oxygen 21.22 21.2216=1.3 1Empirical formula will be C3H9NO(Emperical formula wt)n=146(75)n=146 or n=2, Molecular will be C6H18N2O2

A compound contain $49.2 %$ Carbon, $9.68 %$ Hydrogen, $19.9 %$ Nitrogen. The molar mass of the compound is 146. Find the molecular formula of the compound.