.44 The compressed air tank of a scuba diver reads 3,200 psi at the beginning of a dive and 825 psi at the end of a dive. Convert each of these values to atm and mmHg. 6.48 If someone takes a breath and the lungs expand from 4.5 L to 5.6 L in volume, and the initial pressure was 756 mmHg, what is the pressure inside the lungs (in mmHg) before any additional air is pulled in? 6.52 How hot must the air in a balloon be heated if initially it has a volume of 750. L at 20.oC and the final volume must be 1,000. L? 6.56 If a plastic container at 1.0oC and 750. mmHg is heated in a microwave oven to 80.oC, what is the pressure inside the container (in mmHg)? 6.58 Assuming a fixed amount of gas, complete the following table:   P1 V1 T1 P2 V2 T2  a. 0.55 atm 1.1 L 340 K ? 3.0 L 298 K  0.0oC b. 735 mmHg 1.2 L 298 K 1.1 atm ?  ̶ 120oC c. 7.5 atm 230 mL 15 atm 0.45 L ? 6.62 Calculate the volume of each substance at STP. a. 4.2 mol N2 b. 6.5 g He c. 22.0 g CH4 6.64 What volume does 1.50 ï´ 1024 molecules of CO2 occupy at STP? 6.66 How many moles of gas are contained in a compressed air tank for scuba diving that has a volume of 7.0 L and a pressure of 210 atm at 25oC? 6.68 If a cylinder contains 10.0 g of CO2 in 10.0 L at 325 K, what is the pressure? 6.74 If the pressure due to the striped spheres in the molecular art is 480 mmHg, what is the pressure due to the spotted spheres? What is the total pressure of the system? 
.44 The compressed air tank of a scuba diver reads 3,200 psi at the beginning of a dive and 825 psi at the end of a dive. Convert each of these values to atm and mmHg. 6.48 If someone takes a breath and the lungs expand from 4.5 L to 5.6 L in volume, and the initial pressure was 756 mmHg, what is the pressure inside the lungs (in mmHg) before any additional air is pulled in? 6.52 How hot must the air in a balloon be heated if initially it has a volume of 750. L at 20.oC and the final volume must be 1,000. L? 6.56 If a plastic container at 1.0oC and 750. mmHg is heated in a microwave oven to 80.oC, what is the pressure inside the container (in mmHg)? 6.58 Assuming a fixed amount of gas, complete the following table:   P1 V1 T1 P2 V2 T2  a. 0.55 atm 1.1 L 340 K ? 3.0 L 298 K  0.0oC b. 735 mmHg 1.2 L 298 K 1.1 atm ?  ̶ 120oC c. 7.5 atm 230 mL 15 atm 0.45 L ? 6.62 Calculate the volume of each substance at STP. a. 4.2 mol N2 b. 6.5 g He c. 22.0 g CH4 6.64 What volume does 1.50 ï´ 1024 molecules of CO2 occupy at STP? 6.66 How many moles of gas are contained in a compressed air tank for scuba diving that has a volume of 7.0 L and a pressure of 210 atm at 25oC? 6.68 If a cylinder contains 10.0 g of CO2 in 10.0 L at 325 K, what is the pressure? 6.74 If the pressure due to the striped spheres in the molecular art is 480 mmHg, what is the pressure due to the spotted spheres? What is the total pressure of the system? 
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