What is the density of krypton gas at STP?

1 Answer
Dec 3, 2015

Answer:

The density of krypton at STP is #"3.74 kg/m"^3"#, or #"0.00374 g/cm"^3"# at STP of #0^"o""C"# #("273.15 K")# and #"1 atm"#.
http://www.engineeringtoolbox.com/gas-density-d_158.html
The calculated density is #"0.0037386 g/cm"^3"#.

Explanation:

How to Calculate Density of Krypton from Molar Mass and Molar Volume.

Molar mass #("MM")# is the atomic weight of an element on the periodic table in g/mol.

#"MM"_"Kr"="83.798 g/mol"#
http://www.nist.gov/pml/data/periodic.cfm

Molar Volume #(V_"m")# at STP is #"22.414 L/mol"#
https://en.wikipedia.org/wiki/Molar_volume

#"Density"=("MM")/(V_"m")#

#"Density"_"Kr"=(83.798 "g"/cancel"mol")/(22.414"L"/cancel"mol")="3.7386 g/L"#

#(3.7386"g")/(1"L")xx(1"L")/(1000"mL")="0.0037386 g/mL"="0.0037386 g/cm"^3"# #("1mL=1cm"^3")#