Question

Calculate the molality, the molarity, and the mole fraction of NH3 in an 7.70 mass % aqueous solution (d = 0.9651 g/mL).

Answer 1

Consider loog ‘f sold i0h hass of NH3 7.70 mass of water = (00-7-10 x(o0 hulality, mass of NH, 'm。lav kas, of NH3.c'Jhf of NH3 í. (J , (000 mol aleof the solati on hasoo = (63.116N density o. %9,0 nl has, of NH3 holst mass of Ns Velane ot the Mola' ity, x 100。 Soldion ih 7.20 0o0

moles of Nu nass of N 110 4341t hales "molar mass of NHS 1 nol males ‘f w.tev = mass of H" = S4 q2.31 mol bol fredi on of NH, 05209 meles of NH meles of sster+ mole fraction of NH, 3 S117521 hles of NH 2 008 116