AP Chemistry Multiple Choice Practice Test

Question 1 of 3

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The composition (in mole percent) of the atmosphere is 78.1% N2, 21.0% O2, and 0.9% Ar. What is the partial pressure of each gas when the barometric pressure is 754.1 mm Hg

	N2=405 mm Hg, O2=234 mm Hg, Ar= 293 mm Hg
	N2=21.1 atm, O2=6.5 atm, Ar=0.3 atm
	N2=78.1 mm Hg, O2=21.0 mm Hg, Ar=0.9 mm Hg
	N2=589 mm Hg, O2=158 mm Hg, Ar=7 mm Hg
	N2=244 mm Hg, O2=244 mm Hg, Ar=244 mm Hg