25cm3 of a mixture of nobel gases was obtained from air after the removal of other constituents. What was the original volume of air
-
A.
2,500 cm3 -
B.
1250 cm3 -
C.
125 cm3 -
D.
80 cm3
Correct Answer: Option A
Explanation
Percentage of noble gases in air is 1%
25 = (1/100) * T
∴ T = 25 * 100 = 2500 cm3