Water (H2O) has a molar mass of 18 grams, if that's what you mean.
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The molar mass is 20 g.
The molar mass of a compound is expressed in grams.
This depends on the compound.
The molar mass of the compound CaBr2 is 199.9 grams per mole.
The formula mass of a compound that contains the element would be a larger number than the mass number of the individual element. The individual element would simply be the mass of just that one atom, where as the compound would be the mass of that atom plus the other masses of the other atoms that make up the compound. ex. Oxygen-O has a mass number of about 16 grams. Water-H2O has a formula mass of 2 x mass of Hydrogen-H (about 1) + the mass of Oxygen-O 16 = 18 grams. A formula mass of 18 g is more than a mass number of 16 g.
A sample of a compound contain 1.52 g of Nitrogen and 3.47 g of Oxygen. The molar mass of this compound is between 90 grams and 95 grams. The molecular formula and the accurate molar mass would be N14O35.
18 grams
Moles = Mass (g) x Molar mass (g)
about 18 grams
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Only a compound has a molar mass not a solution.