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400cm3 of hydrogen was collected over water at 25 degree Celsius and 101325Nm-2. What is...

400cm3 of hydrogen was collected over water at 25 degree Celsius and 101325Nm-2. What is the volume of the dry hydrogen at stp if the saturated vapour pressure of water at 25 degree Celsius is 1663Nm-2 (Note Please total = P dry H2+PH2O)?
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