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Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?
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Given these values ΔH°f (C2H4(g)) = 52.3 kJ/mol; ΔH°f(C2H6(g)) = –84.7 kJ/mol, calculate the standar...
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