Question

a chemical reaction produces 7.25 moles of barium sulfate, BaSO4. What mass of barium sulfate is produced

Answer 1

1 mole of any compounds is equal to the molecular mass of that compound. So to find the mass of Barium sulfate produce we have to find the molecular mass of BaSO₄ . Multiplying it with the number of moles gives the total mass of barium sulfate produced.

Mass of Ba= 137.327

Mass of S = 32.065

Mass of O= 15.999

Thus, mass of BaSO₄ = mass of barium+mass of sulphur+4*mass of oxygen(4 atoms of oxygen occurs in its molecular formula)

= 137.327+32.065+4*15.999

= 233.388g/mol

Thus, mass of each mole of barium sulfate = 233.388g

mass of 7.25 moles of barium sulfate = 233.388*7.25

= 1692.063g