7. If 50.0 g of three gases, Ar, SO2 and H2, are placed separately into three id

Question

7. If 50.0 g of three gases, Ar, SO2 and H2, are placed separately into three identical containers, which container will have the lowest pressure? Temperature and volume of all three containers are the same. a. The container with Ar will have the lowest pressure. The container with SO, will have the lowest pressure The container with H2 will have the lowest pressure All three containers will have the same pressure c. d. 8.) Which of the following best explains the answer to the previous question? a. The pressures are the same because b. The pressures are the same because equal c. The pressure is lowest in the container with d. The pressure is lowest in the container with temperature and volume are constant. masses of gasses exert the same pressure. the smallest number of moles. the substance with the greatest molar mass since they exert the most force

Explanation / Answer

7.

PV = nRT

Since T and V are constant,

P ? n

n = mass / Molecular weight (MW)

or

P ? 1 / MW

MW of Ar = 40 g/mol

MW of SO2 = 64 g/mol

MW of H2 = 2 g/mol

Gas with highest molecular weight (MW) will have lowest pressure.

Option b) The container with SO2 will have lowest pressure.

8.

Option c) The pressure is lowest in the container with the smallest number of moles.

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