Please derive how 1ml = 1g. Also, is ml the unit of volume?

Answer 1

1 milliliter is defined as the volume occupied by 1 gram of water under standard conditions (with density 1 g/ml) (otherwise a ml is NOT equal to a gram). The official unit of volume is the m³, although the cm³ (= ml) is also used. The liter and milliliter are used for fluid volume.