4.
A quantity of gas is at a pressure of 5.2 atm and has a volume of 24.0 L. Calculate its volume when the pressure is decreased to 3.0 atm at constant temperature (5 points)
5.
To what Celsius temperature must 0.500 L of gas at 27Â°C be cooled, at constant pressure, so that the volume of the gas is reduced to 1.00 mL? (6 points)
6.
The gas inside a 8.2 L of container has a pressure of 5.1 atm at 25Â°C, if the volume of the container increased to 15.1 L and the temperature of the gas raised to 75Â°C, what will be the pressure inside the container? (6 pts)
7.
At STP condition, what is the volume of 5.0 grams of CO2 gas? (5 pts)
8.
A gas is collected over water at a certain temperature. The total pressure of the gas mixture was found to be 1228 torr. The vapor pressure of water at this temperature is 31 torr. Calculate the partial pressure of the gas at that temperature. (3 points)
9.
Calculate the percent by mass of a solution prepared by mixing 35.0 g of with 435 g of water. (5 points)
10.
A solution is to be prepared that will be 4.50% by mass CaCh. To prepare 175 g of the solution, what mass of CaCl2 will be needed? (3 point)
11.
If a 45.3 g sample of KNO is dissolved in enough water to make 225 mL of solution, what will be the molarity? (6 points)
12.
Calculate the moles of NaCl in 200. mL of 4.5M NaCl solution? (5 pts)
13.
Calculate the volume of 0. 12M sugar solution that contains 0.85moles of sugar? (3 pts)
14.
A chemistry student needs 125 mL of 0.150 M NaOH solution for an experiment, but the only solution available in the laboratory is 3.02 M. How many milliliters of the available solution will be needed to prepare the needed solution? (5 points)

4. A quantity of gas is at a pressure of 5.2 atm and has a volume...