For water, 1ml = 1 gram
Depends on the substance...if it is water, it will be 750 grams
280 ml of water is 280 grams
none
You divide the grams by the density.
That is approximately 230 grams
No, mls (or milliliters) is a measure of volume while grams is a measure or weight or mass.
The conversion of grams to milliliters depends on the density of the gel. Density is typically expressed in grams per milliliter (g/mL). To convert grams to milliliters, divide the mass (in grams) by the density (in g/mL). For example, if the gel has a density of 1 g/mL, then 100 grams of gel would be equal to 100 mL.
Not the same but very close.
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.
It depends what you are measuring, since mls is a measure of volume whereas grams is a measure of weight. For example, 398mls of lead will weigh far more than 398 mls of water. (However if you are converting water or another similarly sloppy liquid (like milk), 398mls is the same as 398 grams).
For butter, the ratio of mL and grams is equal. Thirty milliliters of butter would be equal to 30 grams.
19.8 (19.81426) mL