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3 years ago

A 250mL sample of oxygen is collected over water at 30 C and 850 torr pressure. What is the pressure of the dry gas alone?

Chemistry

1 answer:

3241004551 [841]3 years ago

6 0

Answer:

$p_O=818.2torr$

Explanation:

Hello there!

In this case, according to the given equation, it is possible to calculate the mass of oxygen by using the Dalton's law, considering that the total pressure is 850 torr and the vapor pressure of water at 30°C is 31.8 torr:

$P_T=p_O+p_{H_2O}$

Thus, we solve for the pressure of oxygen as follows:

$p_O=P_T-p_{H_2O}\\\\p_O=850torr-31.8torr\\\\p_O=818.2torr$

Best regards!

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Answer:

CH3COOH would be more concentrated

Explanation:

The higher the concentration value, the more concentrated it is.

The relationship between concentration, moles and volume is given by the equation;

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Number of moles = Mass / Molar mass = 5 / 46.03 = 0.1086 mol

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