I am confused about a problem - it's so easy & hard @ the same time.
An object has a mass of 3.15 oz and a volume of 0.1173 L. What is the density (g/mL) of the object?
The answer key states the following:
#1) 442.5 mL total - 325.2 mL water = 117.3 mL = volume of object
#2) 3.15 oz objects/117.3 mL object x 1 lb/16 oz x 454 g/ 1 lb = 0.762 g/mL
I understand #2, but not #1. Could you provide an explanation for #1?