Step-by-step explanation:
As we know that density is the mass of atom divided by volume occupied by it.
Mathematically, Density =
It is given that mass is 444 grams and volume is 7 liters. Hence, calculate its density as follows.
Density =

=

= 63.42 g/L
Thus, we can conclude that density of the given gas is 63.42 g/L.