Question

19. A 2.24L cylinder of oxygen at N.T.P. is found to develop a leakage. When the leakage was plugged the
pressure dropped to 570 mm of Hg. The number of moles of gas that escaped will be
(A) 0.025
(B) 0.050
(C) 0.075
(D) 0.09​

Answer 1

Answer:

Explanation:

Original pressure of Hg= 760

drop in pressure= 570

change in pressure= 760-570= 190mm

= 190/760 atm

PV= nRT

n = P V/ RT

= 190 x 2.24/ 760 x 0.821 x 273 

= 0.0249 moles