Determine the molar mass of each of the following gases:
a. 2.90 g of a gas that occupies 0.500 L at 0 °C and 1.00 atm (STP)
b. 1.43 g of a gas that occupies 2.00 L at 0 °C and 760 mmHg (STP)
c. 0.726 g of a gas that occupies 855 mL at 1.20 atm and 18 °C
d. 2.32 g of a gas that occupies 1.23 L at 685 mmHg and 25 °C
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