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yarga [219]
3 years ago
6

A mixture of helium, nitrogen and oxygen has a total pressure of 741 mmHg. The partial pressure of helium is 158 mmHg, and the p

artial pressure of nitrogen is 180 mmHg. What is the partial pressure (in mmHg) of oxygen in the mixture?
Chemistry
2 answers:
anygoal [31]3 years ago
6 0

Answer:

403 mmHg

Hope this helped!

LiRa [457]3 years ago
6 0
403 mmHg hoped this helped
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The overall order of an elementary step directly corresponds to its molecularity.
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How many molecules of carbon dioxide are dissolved in 0.550 L of water at 25 °C if the pressure of CO2 above the water is 0.250
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<u>Answer:</u> The number of molecules of carbon dioxide gas are 2.815\times 10^{21}

<u>Explanation:</u>

To calculate the molar solubility, we use the equation given by Henry's law, which is:

C_{CO_2}=K_H\times p_{CO_2}

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Putting values in above equation, we get:

C_{CO_2}=0.034mol/L.atm\times 0.250atm\\\\C_{CO_2}=8.5\times 10^{-3}M

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

Molarity of carbon dioxide = 8.5\times 10^{-5}M

Volume of solution = 0.550 L

Putting values in above equation, we get:

8.5\times 10^{-3}M=\frac{\text{Moles of }CO_2}{0.550L}\\\\\text{Moles of }CO_2=(8.5\times 10^{-3}mol/L\times 0.550L)=4.675\times 10^{-3}mol

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1 mole of a compound contains 6.022\times 10^{23} number of molecules

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Hence, the number of molecules of carbon dioxide gas are 2.815\times 10^{21}

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3 years ago
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