Mark decided that participants in this study will not be at risk, and therefore, he didn't bother the irb with his proposal. his study investigates the number of discomfort people is willing to put up with in order to earn a large sum of money. he recruits students by posting ads about a "contest in which you can earn $1000." everyone who shows up is told that they must do whatever he tells them to do for the next several hours and that the last person to comply will earn the money. he then makes the participants eat disgusting food combinations, rub permanent markers on their own faces, and mail insulting messages to their professors. after two hours he stops the "contest," informs everyone that it was actually an experiment, and explains that there is no prize money. before participants leave, he gets them to sign an informed consent form to acknowledge that they "were free to leave at any time.”

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?