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a gas mixture is made by combining the 6.8 g of each Ar, Ne, and an...

a gas mixture is made by combining the 6.8 g of each Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 16.80 L. What is the molar mass of the unknown gas? Identify the unknown gas: H2, Cl2, N2, F2, or O2.

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