Chem 125 - Online HW 4

Chem 125 - Online HW 4 - Question 1 (Name:Arshi Imtiaz) The...

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Question 1 (Name:Arshi Imtiaz) The pressure of a gas in a flask is measured to be 2.23 x 10 4 Pa. What is this pressure in atmospheres? 167 atm 0.220 atm 29.3 atm 1.69 x 10 7 atm 0.106 atm Question 2 176 grams of NO 2 gas is placed in a 4.40 L flask at 25.1°C. What is the pressure, in atm, in the container? 21.3 atm 19.8 atm 22.0 atm 22.2 atm 979 atm 1.79 atm 3.16 x 10 3 atm Question 3 At constant temperature and volume, how are the pressure and amount of a gas related? Question 4 What is the molar mass of a gas if 0.221 grams of the gas occupies a volume of 226 mL at 20. o C and 643 mmHg? 25.0 g/mol 36.6 g/mol 27.8 g/mol 30.2 g/mol 15.0 g/mol 25.6 g/mol Question 5 (Name:Arshi Imtiaz) The maximum safe pressure that a certain 6.22 L vessel can hold is 13.7 atm. If the vessel contains 0.592 mol of gas, what is the maximum temperature, in K, to which this vessel can be subjected? 1.58 x 10 3 K
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1.85 x 10 3 K 1.57 x 10 3 K 1.93 x 10 3 K 1.75 x 10 3 K 1.65 x 10 3 K 1.68 x 10 3 K Question 6 22.9 mL of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate producing 166 mL of CO 2 which is collected over water at 24.00°C and 727 torr total pressure. The vapor pressure of water at 24.00°C is 22.4 torr. 2 HCl(aq) + MgCO
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This note was uploaded on 04/09/2008 for the course CHEM 125 taught by Professor Bussell during the Fall '06 term at Western Washington.

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Chem 125 - Online HW 4 - Question 1 (Name:Arshi Imtiaz) The...

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