Your answer should have the same number of significant figures as the starting measurement. 400.08 ml = l

Conversion factor is defined as the ratio which shows the relation between two different units. It is equal to one.

Since, one litre is equal to thousand millilitre.

Expression is : 1 L = 1000 mL

The given value of measurement is 400.08 mL

Convert the above measurement in L, we get

400.08 mL =

= 0.40008 L.

Now, in given measurement, there are five significant figures, thus, the above number must be written in five significant figures i.e 0.40008 L.

Hence, the answer is 0.40008 L.