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Question

10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to



A

1.07 atm

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B

0.97 atm

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C

1.02 atm

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D

0.92 atm

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Solution

The correct option is B

0.97 atm


2H2(g)+O2(g)      2H2O (l )

0.2 mole 0.1 mole 0.2 mole

moles of gas remaining = 9.7 at constant (T) & (V)

n1n2=p1p2

109.7=1p2 & p2=0.97


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