A 2.24 L cylinder of oxygen at N.T.P. was 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 escaped will be

Options

A. 0.025
B. 0.5
C. 0.075
D. 0.09

Answer

A

Explanation

Find no. of moles of the gas leaked out by relation,
`n = (("drop in Pressure")V)/(RT)`
`= (190 xx 2.24)/(760 xx 0.0821 xx 272) = 0.0249`
`~~0.025` mole