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how to convert Nm3/hr to Kg/hr for air, @ 10.4 kg/cm2.g dischare pressure, does density doesn't affect on calculation?

how to convert Nm3/hr to Kg/hr for air, @ 10.4 kg/cm2.g dischare pressure, does density doesn't..

as I know for air,
Kg/hr=Nm3/hr* 29/22.4
but what about density at pressure of 10.4 kg/cm2.g?

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