Revisiting physical 1!

Chemistry Level 3

A spherical balloon of 21 cm diameter is to be filled up with hydrogen at S.T.P. from a cylinder containing the gas at 20 atmospheres at 27 degree celsius. If the cylinder can hold 2.82 litres of water, calculate the number of balloons that can be filled up.

If you get a non-integral​ answer round off to the nearest integer

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