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4.0 g of a gas occupies 22.4 litres at N...

`4.0 g` of a gas occupies `22.4` litres at NTP. The specific heat capacity of the gas at constant volume is `5.0 JK^(-1)mol^(-1)`. If the speed of sound in this gas at NTP is `952 ms^(-1)`. Then the heat capacity at constant pressure is

A

`7.5JK^(-1)mol^(-1)`

B

`7.0JK^(-1)mol^(-1)`

C

`8.5JK^(-1)mol^(-1)`

D

`8.0JK^(-1)mol^(-1)`

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