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Answer:
To keep simplicity, let's assume these gases behave ideally so we can use the equations for ideal gas. One of these equation is the Raoult's Law written below.
P* = xP
This is another form of the Raoult's Law where x is the mole fraction. Let's find x for O2.
x = 0.18/(0.76+0.18+0.031+0.026) = 0.1805
Partial Pressure = (0.1805)(749 mmHg) = 135.23 mmHg
Explanation:
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