Which statement holds true when the molar mass of hydrogen is 2.0 grams and that of helium is 4.0 grams? hydrogen effuses 1.4 times faster than helium. hydrogen effuses 0.71 times faster than helium. helium effuses 1.4 times faster than hydrogen. helium effuses 0.71 times faster than hydrogen. the rate of effusion of both gases is the same.
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Which statement holds true when the molar mass of hydrogen is 2.0 grams and that of helium is 4.0 gr...
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