Find the gram formula mass of each compound.

a. barium fluoride

b. strontium cyanide

c. sodium hydrogen carbonate s. aluminum sulfide

The gram formula mass is another term for the mass of one mole of the substance which can be calculated by adding up the masses of the elements comprising the formula unit, molecules, etc.

a. Barium Fluoride (BaF2)

m = mass of Ba + 2 (mass of F)

m = 137.327 g + 2 (19 g)

m = 175.327 g

b. Strontium Cyanide (Sr (CN) 2)

m = mass of Sr + 2 (mass of C) + 2 (mass of N)

m = 87.62 + 2 (12) + 2 (14)

m = 139.62 g

c. Sodium hydrogen Carbonate (NaHCO3)

m = mass of Na + mass of H + mass of C + 3 (mass of O)

m = 23 + 1 + 12 + 3 (16)

m = 84 g

d. Aluminum sulfide (Al2S3)

m = 2 (mass of Al) + 3 (mass of S)

m = 2 (26.98) + 3 (32)

m = 149.96 g