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What is the STP of ##H_2## in chemistry?
As far as I l know ##STP## specifies ##273.15*K##, and a pressure of ##1## ##atm.##
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Under the given condtions, ##1## ##mol## dihydrogen gas would have a volume of ##22.41*L## at ##STP##. What is the mass of this quantity of ##H_2##?