The ratio of masses of oxygen and nitrogen in | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Let the mass of $O_2$ be $w$ and the mass of $N_2$ be $4w$.The molar mass of $O_2$ is $32 \ g/mol$ and the molar mass of $N_2$ is $28 \ g/mol$.The

Vedclass · Accepted Answer

$7 : 32$

Vedclass · Answer

(B) Let the mass of $O_2$ be $w$ and the mass of $N_2$ be $4w$.The molar mass of $O_2$ is $32 \ g/mol$ and the molar mass of $N_2$ is $28 \ g/mol$.The number of molecules is proportional to the number of moles $(n = \frac{	ext{mass}}{	ext{molar mass}})$.Number of molecules of $O_2$ $(N_{O_2})$ = $\frac{w}{32} 	imes N_A$Number of molecules of $N_2$ $(N_{N_2})$ = $\frac{4w}{28} 	imes N_A$Ratio $\frac{N_{O_2}}{N_{N_2}} = \frac{w/32}{4w/28} = \frac{w}{32} 	imes \frac{28}{4w} = \frac{28}{128} = \frac{7}{32}$.

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1 : 4$. The ratio of the number of their molecules is:

Similar Questions

What is the actual mass of a water molecule?

$1 \ mL$ of water has $25$ drops. Let $N_0$ be the Avogadro number. What is the number of molecules present in $1$ drop of water? (Density of water $= 1 \ g / mL$)

The density of water is $1 \, g/mL$. What is the volume occupied by $1$ molecule of water :-

If one atom of an element $X$ weighs $6.643 \times 10^{-23} \ g$,then find the number of moles of atoms in $50 \ kg$ of element $X$. (in $moles$)

What is the number of moles of $Cl$ atoms and $N$ atoms respectively present in $n$ moles of tear gas?

Vedclass Test Series

Exam Paper Generator

Online Exam Module