Determine the molar mass of each of the following gases: a.) 0.82g of a gas that occupies 470mL at 0C and 1.00 atm (STP). b.) 1.48g of a gas that occupies 1.45L at 0C and 760 mmHg (STP). c.) 1.48g of a gas that occupies 1.30L at 695 mmHg and 20.0C. d.) 2.8g of a gas that occupies 2.4L at 0.87 atm and 27C.