A flask contains three times as many moles of $H_{2}$ as it does $O_{2}$ . If hydrogen and oxygen are the only gases present, what is the total pressure in the flask if the partial pressure of oxygen is P?

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3/4P

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Solution

The correct option is A 4P
Let number of moles of $O_{2}$ $=$ $X$
So, number of moles of $H_{2}$ $=$ $3 X$
Total moles $=$ $4 X$
Partial pressure of $O_{2}$ $=$ $X / 4 X$ $= 0.25$
So, $0.25 \times P_{T}$ $=$ $P$
Hence, $P_{T}$ $=$ $4 P$

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A flask contains three times as many moles of H2 as it does O2. If hydrogen and oxygen are the only gases present, what is the total pressure in the flask if the partial pressure of oxygen is P?

The correct option is A 4PLet number of moles of O2=XSo, number of moles of H2=3XTotal moles=4XPartial pressure of O2=X/4X=0.25So, 0.25×PT=PHence, PT=4P

A flask contains three times as many moles of $H_{2}$ as it does $O_{2}$ . If hydrogen and oxygen are the only gases present, what is the total pressure in the flask if the partial pressure of oxygen is P?

The correct option is A 4P
Let number of moles of $O_{2}$ $=$ $X$
So, number of moles of $H_{2}$ $=$ $3 X$
Total moles $=$ $4 X$
Partial pressure of $O_{2}$ $=$ $X / 4 X$ $= 0.25$
So, $0.25 \times P_{T}$ $=$ $P$
Hence, $P_{T}$ $=$ $4 P$