Question #74d82

1 Answer
Jan 15, 2017

Answer:

You divide molar mass by molar volume.

Explanation:

Molar mass for #HCl# is (rounded) #1.0+35.5=36.5g//mol#
(you can get more exact figures from any source).

Molar volume at #273Kand1atm=22.4dm^3//mol#

So #HCl# has a density of:

#rho=(36.5g//cancel(mol))/(22.4dm^3//cancel(mol))=1.63g//dm^3=1.63kg//m^3#

Note : There are many STP conditions defined. I used the one that is most common in my country.