Volume of one glass of milk = 250 mL
Percent by volume of butterfat in homogenized milk = 4%
This means 4mL butterfat is present per 100mL milk
Volume of fat present in 250 mL of homogenized milk:
[tex]250mL milk*\frac{4mL butterfat}{100mL milk}= 10mL butterfat[/tex]
Therefore, 250mL homogenized milk which is 4 % butterfat contains 10mL butterfat.
If the density of butterfat is 0.8g/mL, the mass of butterfat present in 250mL milk will be:
[tex]10mL butterfat*\frac{0.8g butterfat}{1mL butterfat} =8g butterfat[/tex]
