There is no sensible answer to this question. A millilitre is a measure of volume, with dimensions [L3]. A gram is a measure of mass, with dimensions [M]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions without additional information. A little thought will make it clear that 1 gram of air will occupy far more volume than 1 gram of lead, for example.
Only if you have pure water in mind: 123 milliliter of pure water weigh 123 gram.
Only if you have pure water in mind: 120 milliliters of pure water weigh 120 grams.
120 ml of water weighs 120 grams
The mass of 120 mL of water is 120 g.
It is 40/120 = 0.33... grams per mL.
The only way to answer this is to know what substance you are measuring. Tablespoon is a measurement of volume (15 ml) and gram is a measurement of weight. 120 grams of water would fill a volume of 120 ml or 8 tablespoons whereas 120 grams of salt (which is about 2.1 times denser than water) would only fill about 3.8 tablespoons.
This is not a valid conversion; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Density = Mass/Volume = 120 grams/7 ml = 17.142857... grams per ml.
120 ml = 120 cubic cm
This is not a valid conversion. Milliliters (mL or ml) and liters (L) are measures of volume. Grams (g), kilograms (kg) and milligrams (mg) are measures of weight or mass.
120
120 tablespoons of water is 1,800 ml
A level Tblspoon weighs 23gram
120 mL is about 4.057 US fluid ounces.