The mass of an evacuated 275 mL flask is 143.562 g. The mass of the flask filled with 371 mbar of an unknown gas at 25 °C is 143.854 g. Part A Calculate the molar mass of the unknown gas. Express the molar mass in grams per mole to three significant figures. Molar mass V| ΑΣΦ Templates ? g mol-1

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