A 21.9 g21.9 g sample of CaSO4CaSO4 is found to contain 6.45 g6.45 g of CaCa and 10.3 g10.3 g of O. Find the mass of sulfur in a sample of CaSO4CaSO4 with a mass of 70.9 g.70.9 g. mass of sulfur

Areaction in which products can react to re-form reactants is

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Salt in oceans comes from and of rocks