How many moles of hydrogen gas are contained in 21.3 L at stp?

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Dave Share
Mar 9, 2018

Answer:

See Below

Explanation:

STP is standard temperature and pressure, 273.15K and 1 atm.

We'll use the ideal gas law to sort this out.

#PV=nRT#, and solve for n; #R = 0.0821"L*atm"/"mole*K"#

#n = "PV"/"RT"#

#n = "1atm*21.3L"/("0.0821"(L*atm"/"mol*K)"*273.15K")#

#n = 0.950 "moles" H_2#

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