Question

180 mL of pure water (d = 1 g/mL) is saturated with NH3 gas. If the solution contains 40% by mass of NH3 and has a density 0.9
g/mL The volume of NH3 solution is
​

Answer 1

Answer:

80mL

Explanation:

Density = mass/volume

density of water = 1g/mL

volume of water = 180mL

mass of water = density * volume = 1*180 = 180g

% mass of NH3 = 40% of 180g

actual masss of NH3 = 40*180/100 = 72g

density of NH3 = 0.9g/mL

volume of NH3 = mass/density = 72/0.9 = 80 mL