A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 745torr, and the water vapor has a partial pressure of 24 torr. What is the partial pressure of the hydrogen gas?

Answer 1

Use the Daltons law of partial pressures : the total pressure of the mixture is the sum of the partial pressures of all the gases present provided these gases are non-reacting

#P_(Total)=p_(H_2O)+p_(H_2)# 745=24+ x x=721 torr

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Answer 2

Owen Ambrose

To find the partial pressure of the hydrogen gas, subtract the partial pressure of the water vapor from the total pressure of the mixture.

Partial pressure of hydrogen gas = Total pressure of the mixture - Partial pressure of water vapor Partial pressure of hydrogen gas = 745 torr - 24 torr Partial pressure of hydrogen gas = 721 torr

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.