please answer both and use correct sig figs !!

there is no unit in question 4, just solving for the letter M

4. If PV = [gR(T+273.15)J/M, solve for M when P=535! V =0.729, g = 1.735, R = 62.37, and T = 44. 5. An ore contains 37.1 % of the mineral anglesite, PbSO., which is a source of the element Pb. How much ore must be processed in order to obtain 49.0 kg of Pb