(8 pts) Calculate the following: 15. a) Mass of 1.0 mole of Mg Rad So b) Mas,of,75 if,oles ofMg c) Mass of 0.75 moles of CO2 d) Number of moles in 50.0 g of CO2 16, (8 pts) Calculate the % composition for each of the following compounds: a) MgCl2 b) Na CO