6 litre `H_(2)O` is placed in a closed evacuted room of volume 8.27 litre at the temperature 300K. The density of liquid water at 300 K is 1.0 gm/ml. the vapour pressure of water at 300 K is 22.8 mm Hg. Neglect the change in volume of liquid water by vaporization. `{:("List I",,"List II"),("(P) Mass of watwer vapour formed (in gm)",,"(1) 6"),("(Q) Moles of water vapour fomed",,"(2) 18"),("(R) Approx. mass of liquid water left (in kg)",,"(3) 3"),("(S) Total moles of atoms in vapour form",,"(4) 1"):}`

Options

A. `{:(P,Q,R,S),(1,3,4,2):}`
B. `{:(P,Q,R,S),(3,1,2,4):}`
C. `{:(P,Q,R,S),(2,4,1,3):}`
D. `{:(P,Q,R,S),(2,1,4,3):}`

Answer

C

Explanation

V=827 L
T=300 K
`P=22.8/760 atm`
`Pv=nRT`
`22.8/ 760 xx827 =nxx0.08 xx300 `
`n=(22.8xx827)/(760xx0.08xx300)`
`n_(g)=1`