A sample of an unknown gas with a mass of 3.24 g occupies a volume of 1.88 L at a pressure of 748 mmHg and a temperature of 20.0 °C. (7.4, 7.5, 11.7, 11.8)
a. What is the molar mass of the gas?
b. If the unknown gas is composed of 2.78 g of carbon and the rest is hydrogen, what is its molecular formula?
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