Answer:
633.5
Explanation:
The total presser is 650.00 mmHg, and it is collected over water, which at 19c is 16.5 mmHg. Therefore, to get the total pressure of H2 you would subtract the partial pressure of water from the total pressure.
650-16.5=633.5
633.5 mmHg is the pressure of hydrogen gas formed in mmHg.
According to the Dalton's law of partial pressure, the total pressure of a gas mixture is the sum of all the partial pressure of the individual gases present in the mixture of gases.
Hence;
Total pressure = pressure of hydrogen gas + vapour pressure of water
pressure of hydrogen gas = Total pressure - vapour pressure of water
vapour pressure of water at 19°C = 16.5 mmHg
pressure of hydrogen gas = 650.0 mmHg - 16.5 mmHg
pressure hydrogen of gas = 633.5 mmHg
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