Homogenized whole milk contains 4% butterfat by volume. how many milliliters of fat are there in a glass (250 ml) of milk?

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:

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:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.