Approximately 6g.
The density of pure water at 20 degrees centigrade and standard atmospheric pressure is 1 g/ml. The answer is approximate since the water may not be chemically pure and you do not give a temperature or pressure.
6ml
4,5 grams
This is (mass of solute) divided by (mass of total solution) expressed as a percentage. The solute is what you are dissolving into the solution. Example: you have 90 grams of water, and you add 10 grams of salt (sodium chloride). The water is the solvent, sodium chloride is the solute, and the solution is salt water. 90 grams + 10 grams = 100 grams (mass of total solution). (10 grams) / (100 grams) = 0.1 --> 10% mass mass percent concentration.
27 grams.
assuming water is the substance, 6mL
6ml
Incomparable Units. Grams is a measure of mass,and millimeters is a measure of volume
6ml is hard to explain in words. If the density is 1 gram per ml, such as water is at room temp, then 6ml will be the volume taken up by 6 grams of water
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. However, 6ml of water, at just above freezing, will have a mass of 6mg (and a volume of 6 cubic centimeters).
Density is mass per volume - mass/volume. So if you have 3g and 6ml you have 3/6 g/ml or 0.5 g/ml.
45mL of plain water has a mass of about 45 grams.
500 grams
Density = 13.6 g/mL
This cannot be sensibly answered. Milliliters (mL or ml) is a measure of volume, grams is a measure of weight or mass.
1,000 Grams
18 grams
4,5 grams