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`        A spherical balloon of 21cm diameter is to be filled up with H2 at NTP from a cylinder containing the gas at 20 atm at 27C.The cylinder can hold 2.82lt of H2O.The number of balloon that can be filled up?`
one month ago

Vikas TU
8721 Points
```							Dear student Volume of 1 balloon to be filled = 4/3 r3= 4/3 * 22/7 * (21/2)3 = 4.851 litreLet n balloons are filled, then total volume of H2 used in filling balloons = 4.851 * n litreCylinder of H2 used in filling balloons will also H2, after n balloons are filled:Volume of cylinder = 2.82 LTherefore total volume of H2 at NTP = Volume of n balloons + volume of cylinder= 4.851*n + 2.82 - 1The volume of H2 at NTP can be found out using this data:P1V1/T1 = P2V2/T2 or 1*V/273 = 20*2.82/300Therefore:V = 20*2.82*273/300 - 2Both 1 and 2 should be same:4.851*n + 2.82 = 20*2.82*273/300Thus, n = 10Hope this helps Good luck
```
one month ago
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