Avolume of 2000 ml can be expressed as

These are three different forms of expressing a volume of 2000 ml:

Explanation:

The expression 2000 ml means 2000 mililiters and convey three important informations:

You might express the same volume with a different unit, e.g. liter, and in a different way (using scientific notation).

1) Changing the unit.

To change ml to liter you must multiply for the conversion factor:

Thus, 2000 ml is equal to:

2) Using scientific notation:

You change the number to a power of ten, using a decimal greater than or equal to 1 and less than 10.

For 2000 the decimal is 2. and the power of ten is 3 (for the three zeros after the 2):

pure substance: iron,copper

impure substance: water,charcoal