6. A balloon containing o 100 moles ofHe gas has a volume of 2.45 liters at 25 a

Question

6. A balloon containing o 100 moles ofHe gas has a volume of 2.45 liters at 25 and its f 7600 torr. balloon rose into the and its changed to 15 C pressure decreased to 720 torr, what would the volume of the balloon be? 288 7. A cylinder ofoxygen for medical use contains 34.5Lofoxygen at a pressure of 149.6 atm at (a) What is the pressure of this oxygen if the cylinder is stored in a warehouse with n 25°C. conditioning at a temperature of 49.5 C? 322 za8 pres sure lov.a (b) What is the density of the oxygen in the cylinde Volume Male alml .200 g of H2. What is the 8. A 5.73 liter flask at 25°C contains 1.50 g of N2, 4.00 g of CO. pressure in the flask in atmospheres, in torr, and in kilopascals? Advanced Chemistry with Ver

Explanation / Answer

Given

N2 = 1.50 g = 1.50/28 = 0.05 mole

CO = 4.0 g = 4.0/28 = 0.14 mole

H2 = 0.20 g = 0.20/2 = 0.1 mole

Total moles in the 5.73 L flask at 250 C

(0.05+0.14+0.1) moles = 0.29 moles

By Gas laws, Total pressure = nRT/V = (0.29 * 0.082 * 298)/5.73 atm = 1.23 atm = 124.62 Kiolpascal = 934.8 torr

1 atm = 101,325 pascal = 760 torr

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