Some Basic Concepts Of Chemistry Question 205
Question: The number of moles of oxygen in $ 1\ L $ of air containing 21% oxygen by volume, in standard conditions, is [CBSE PMT 1995; Pb. PMT 2004]
Options:
A) 0.186 mol
B) 0.21 mol
C) 2.10 mol
D) 0.0093 mol
Show Answer
Answer:
Correct Answer: D
Solution:
1L of air =210cc $ O _2 $
22400cc = 1 mole $ 210,cc=\frac{1}{22400}\times 210=0.0093 $ .
