Name 9. what volume will 3.5g of CO occupy at 17°C and 1875 torr? 10. A typical

Question

Name 9. what volume will 3.5g of CO occupy at 17°C and 1875 torr? 10. A typical air sample in the lungs contains oxygen at 100 mm Hg, nitrogen at 573 mm Hg. carbon dioxide at 40 mm Hg, and water vapor at 47 mm Hg. Why are these pressures called partial pressures? 11. An anesthetic consists of a mixture of cyclopropane gas, CaHa, and oxygen gas, O2 If the mixture has a total pressure of 825 torr, and the partial pressure of the cyclopropane gas is 73 torr, what is the partial pressure of the oxygen in the anesthetic? what is the partial pressure of nitrogen in exhaled air. 12. If 74.5 % of exhaled air is nitrogen, Assume that the total pressure of exhaled air is 760. mm Hg. 12-7

Explanation / Answer

Q no 9 = we know that

PV = nRT

Where,

P= pressure of gas[ 1 atm = 760 torr,, therefore, 1875 torr=2.47atm]

V = volume

n= no of moles [weight/mol. Mass]

R= Gas constant 0.0821atm. L/mol.K

T = temperature in(K) [17°C =290K]

Therefore,

2.47xV=(3.5/28)x0.0821x290

2.47xV=2.976

V= 2.976/2.47

V= 1.20L

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