Not sure what a cubic gram is.
Grams per litre is simple a measure of density. Whatever cubic grams is, it is not a measure of density and so these two measure different things. Therefore, according to the rules of elementary dimensional analysis, conversion from one to the other is not valid.
Gases normally have a density of a few grams per liter (i.e., per cubic decimeter), at most. Air, for example, has a density of about 1.2 grams per liter, at standard temperature and pressure. The standard SI unit for density would be kilogram per cubic meter (which actually happens to be equivalent to grams per liter!), but many people are still accustomed to specify the density per liter, not per cubic meter.
(Micrograms per litre)/(gram molecular weight of solute) = (micromoles per litre).
The numbers are equivalent. For example, 5 grams per 100 grams = 5%.
There are 1,000 milligrams per gram. 0.2 grams*(1000 milligrams/gram) = 200 milligrams
One gram equals 1,000 milligrams.
The question is meaningless. No such thing as a cubic gram.
To convert grams per cubic centimeter (g/cm^3) to milligrams per liter (mg/L), you need to multiply by 1000. This is because there are 1000 milligrams in a gram and 1000 cubic centimeters in a liter.
1 liter of water has a mass of 1000 grams since there are 1000 cubic centimeters in a liter.
Grams and cubic centimeters are interchangeable. 100g of water = 100cm3 of water.
1 milligram per litre is 0.001 grams per litre. 1 gram per litre is 1000 milligrams per litre.
To convert grams to milligrams, you multiply the number of grams by 1000 because there are 1000 milligrams in a gram. For example, to convert 3 grams to milligrams, you would calculate 3 grams x 1000 = 3000 milligrams.
Gases normally have a density of a few grams per liter (i.e., per cubic decimeter), at most. Air, for example, has a density of about 1.2 grams per liter, at standard temperature and pressure. The standard SI unit for density would be kilogram per cubic meter (which actually happens to be equivalent to grams per liter!), but many people are still accustomed to specify the density per liter, not per cubic meter.
(Micrograms per litre)/(gram molecular weight of solute) = (micromoles per litre).
That is impossible. Length can never be converted to weight or mass. Actually it is possible. You must first convert the meters to cubic decimeters. 1 cubic decimeter is equal to 1 liter. So then you convert the liters to mililiters. 1 mililiter is equal to 1 gram. It is funny to convert linear length meter to a volume. Magic!
One liter of water weighs one kilogram. One kilogram is 1,000 grams. One liter is 1,000 cubic centimeters (a.k.a. "cc" or "ml") So: One cc weighs one gram. Isn't the metric system wonderful?
The number of grams in 1 liter of a substance depends on the substance's density. To convert between liters and grams, you need to know the substance's density. To calculate, you multiply the density by the volume in liters to get the mass in grams.
The numbers are equivalent. For example, 5 grams per 100 grams = 5%.