# 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?

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

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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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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.

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.

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.

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