Unit conversion is a multi-step process, in which division or multiplication by a numeral factor is involved.
Density = [tex]7.2 g/mL[/tex] (given)
Since, [tex]1 g = 0.001 kg[/tex] and
[tex]1 mL = 0.001 L[/tex]
Now, converting [tex]7.2 g/mL[/tex] to [tex]kg/L[/tex]:
[tex]7.2 \frac{g}{mL}\times \frac{1 kg}{1000 g}\times \frac{1000 mL}{1 L}[/tex]
= [tex]7.2 kg/L[/tex].
Hence, density is [tex]7.2 kg/L[/tex].
