Around 1 kilogram.
1.00 grams
45mL of plain water has a mass of about 45 grams.
500 grams
1,000 Grams
18 grams
4,5 grams
One gallon of water weighs about 3,785.23 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.
0.001
Water (H2O) has a molar mass of 18 grams, if that's what you mean.
27 grams.
40 grams
75 grams