A sample of lead has a mass of 40.00 kg and a density of 1.130 x10^4 kg/m3 at 0°C. (Assume the average linear expansion coefficient for lead is 2.900 x10^-5(°C-1).)
(a) What is the density of lead at 70.00°C? (Give your answer to four significant figures.)
(b) What is the mass of the sample of lead at 70.00°C?