A thermodynamically unfavorable reaction can become favorable when coupled to a highly ________ reaction. A thermodynamically un
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Answer : The partial pressure of helium is,
Solution : Given,
Molar mass of = 32 g/mole
Molar mass of helium = 4 g/mole
Molar mass of = 28 g/mole
Total pressure of gas =
As we are given gases in percent, that means 10 g of oxygen gas, 50 g of helium gas and 40 g of nitrogen gas present in 100 g of mixture.
First we have to calculate the moles of oxygen, helium and nitrogen gas.
Now we have to calculate the total number of moles of gas mixture.
Now we have to calculate the moles fraction of helium gas.
Now we have to calculate the partial pressure of helium.
where,
= partial pressure of helium
= total pressure
= mole fraction of helium
Now put all the given values in this formula, we get
Therefore, the partial pressure of helium is,