Ammonia gas is passed into water yielding a solution of density 0.93g/cm^3 and containing 18.6% ammonia by weight. The mass of ammonia per cc of solution is

We know that density = mass/volumeTherefore, mass = density * volumeGiven density = 0.93g/ccLet us calculate mass of 1 cc of solutionmass = 0.93 * 1 = 0.93gNow, we know that 1 cc of solution weighs 0.93gGiven that the solution contains 18.6% ammonia by weight, 1 cc of solution should have:18.6% of 0.93g as ammonia= 0.186 * 0.93 = 0.173gTherefore, the mass of Ammonia per cc of solution = 0.173g.

18.6% NH3 in 100g solution density=0.93Now density= mass/volume Volume=density /mass= 100/0.93100/0.93 -----------------------18.61----------------------------------18.6/100/0.93=0.1729g/cm^3