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Numerical

A cylinder of 20 liters capacity contains gas at 100 atmospheric pressure. How many flasks of 200 cm^{3}capacity can be filled from it at 1-atmosphere pressure, temperature remaining constant?

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#### Solution

P = 100 atm

V = 20 litres

P_{1} = 1 atm

V_{1} = ?

T = T_{1}

Using equation,

`"PV"/"T" = ("P"_1 "V"_1)/"T"_1`

`(100 xx 20)/"T" = (1 xx "V"_1)/"T"`

V_{1} = 2000 litres = 2 m^{3} (1000 lit = 1m^{3})

Volume of one flask = `200/(100xx100xx100) "m"^3`

Number of flasks = `(2xx1000000)/200 = 10000`

Number of flasks = 10000

Concept: Standard Temperature Pressure (S.T.P.)

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