1. Tardigrade
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  4. A gas at one atmosphere and 100 mL is mixed with another gas of equal moles at 0.5 atm and having volume 50 mL in flask of 1 L. What is their final pressure?

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Q. A gas at one atmosphere and 100 mL is mixed with another gas of equal moles at 0.5 atm and having volume 50 mL in flask of 1 L. What is their final pressure?

Kinetic Theory

Solution:

No. of moles in mixture is the sum of separate no. of moles of gases.
$n = n_1 + n_2$
or $\quad \frac{PV}{RT} = \frac{P_{1}V_{1}}{RT}+\frac{P_{2}V_{2}}{RT} or P ×1000 = 1 × 100 + 0.5 ×50$
or $\quad P = \frac{125}{1000} atm = 0.125\,atm$