The number of moles of oxygen in $1 \ L$ of air containing $21 \%$ oxygen by volume,at standard temperature and pressure $(STP)$,is (in $mol$)
- A$0.186$
- B$0.21$
- C$2.10$
- D$0.0093$
Explore More
Similar Questions
The volume of a gas in a discharge tube at $STP$ is $1.12 \times 10^{-7} \ mL$. What is the number of molecules of the gas in the tube?
Medium
View SolutionWhat amount of dioxygen (in gram) contains $1.8 \times 10^{22}$ molecules?
What is a mole?
Easy
View SolutionFind the volume at $STP$ and mass of $6.022 \times 10^{23}$ molecules of $O_2$. (Molar volume $= 22.4 \ L$)
Medium
View SolutionThe ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1 : 4$. The ratio of the number of their molecules is:
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo