What mistakes did we make in this problem?
	What is the volume that 500 g of iodine will occupy under the conditions:     Temp = 300oC and Pressure = 740 mm Hg?
				Step 1)  Write down given information.         mass =  500 g iodine  Convert mass to gram;          recall iodine is diatomic (I2)          x mol I2 = 500 g I2(1mol I2 / 254 g I2)    n = 1.9685 mol I2    T = 300oC Temperature must be converted to Kelvin          T = 300oC + 273    T = 573 K         P = 740 mm Hg Pressure needs to have same unit as R;        therefore, convert pressure from mm Hg to atm.        x atm = 740 mm Hg (1 atm / 760 mm Hg)    P = 0.8 atm         R = 0.0821 atm . L / mol . K