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The density of lead is 1.13 x 10* kg/m at 20.0.C. Find its density (in kg/m ) at 101.C. (Use a = 29 x 10 6 ("C)" for the coefficient of linear expansion. Give your answer to at least four significant figures.) HINT kg/m3 Need Help? Read It Watch it (a) A tank contains one mole of oxygen gas at a pressure of 6.60 atm and a temperature of 30.50C. The tank (which has a fixed volume) is heated until the pressure inside triples. What is the final temperature of the gas? OC (b) A cylinder with a moveable piston contains one mole of oxygen, again at a pressure of 6.60 atm and a temperature of 30.50C. Now, the cylinder is heated so that both the pressure inside and the volume of the cylinder double. What is the final temperature of the gas? OC Need Help? Read It In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (-196.C) and in boiling ethyl alcohol (77.C). The separate pressures are 0.347 atm and 1.627 atm. Hint: Use the linear relationship P = A + BT, where A and B are constants. (a) What value of absolute zero does the calibration yield? bc (b) What pressure would be found at the freezing point of water? atm (c) What pressure would be found at the boiling point of water? atm Need Help? Read It Master It