### How do you get the chemical formula for barium nitride?

Since Nitride has an oxidation state of -3 ( N3- )and Barium has an oxidation state of +2, or Ba2+, then we balance out the charges to obtain the chemical formula, or Ba3N2, which brings the overall oxidation state to 0 Since Barium is Ba is +2 and Nitride is -3, they are balanced when 2 atoms of Barium (+6) are joined to 2 atoms of Nitride (-6), so the formula is Ba3N2.

### How many nitrogen atoms are in 18.8 g of barium nitride?

Barium nitride is Ba3N2 (from the rules of ionic bonding). Its molar mass is 439 grams/mole (from the periodic table), so 18.8 grams of it is 0.0428 moles (by algebraic direct proportion). Multiply this by Avogadro's number (6.02x1023; the number of particles in 1 mole) and you get 2.58x1022 formula units of barium nitride, and there are 2 nitrogen atoms per formula unit, so double it to 5.16x1022 atoms of nitrogen.

### What is the molar mass of barium phosphate?

the empirical mass of barium phosphate (Ba3(PO4)2) is 601.93 g/mol. To find the molar mass, you would need to balance the formula this compound is in. If there is no coefficient in front of this chemical formula once it has been balanced, the molar mass of barium phosphate is 601.93 g/mol as well. If it has, for say, a 2 in front of it once the formula has been balanced, you would multiply the empirical…