Determine the quantity of charge on the following questions. use 1.60 x 10" c for the charge of an electron. 3. plastic tube which has been rubbed with animal fur and gained 3.8x10 electrons. a. a (3 marks] b. a vinyl balloon which has been rubbed with animal fur and gained 1.7x102 electrons. an acetate strip which has been rubbed with wool and lost 7.3x1 0 electrons 4. a 3.6 uc charge is moved from a position where its electric potential energy is 7.2 mj to a position where its potential energy is 1.8 mj. what is the change in potential from the initial position to the final position? a. 1500 v b. 2000 v c. -2000 v d. 3500 v e. -1500 v 5. a hollow conducting sphere of radius 12 cm had a charge of 18 uc placed on it. what is the potential 20 cm from the center of the sphere? α.0 v b. 15 v

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?