Carbon tetrachloride may be produced via the reaction between methane and chlorine gases: """ch4 (g) + 4 cl2 (g) => ccl4 (l) + 4 hcl (g)"""
if this reaction generates 2.50 gallons of ccl4, how many pounds (lbs) of hcl were also generated? the
density of ccl4 is 1.5867 g/ml.

i do not know how to approach this question because it features 4 different types of units:
an explanation would be appreaciated