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The molar mass of NaNO3 is equal to the sum of the molar masses of all the elements that make up one molecule of the compound. To find the masses of these elements, consult the Periodic Table. The molar masses of Sodium, Nitrogen and Oxygen are 22.99, 14.01 and 16 grams, respectively. To find the molar mass of NaNO3, add the molar masses of all the atoms used in the compound 22.99g + 14.01g + (3 x16g), which is equal to 85g.
To calculate the molar mass of a compound, find the number of grams of each element contained in one mole of the compound. Then add the masses of the elements in the compound. Describe how to convert between the mass and the number of moles of a substance. The molar mass of an element or compound is the conversion factor for converting between the mass and the number of moles of a substance. What is the volume of one mole of any gas at STP? One mole of any gas occupies a volume of 22.4 L at STP. One mole of any substance contains Avogadro's number of particles, so 22.4 L of any gas at STP contains 6.02 x10^23 represenative particles of that gas.