# What is the solubility of NH_3 in 100 g of water at a temperature of 20°C?

The commercial product ammonium hydroxide (or more correctly saturated aqueous ammonia), is approx, 30% ammonia by mass.
If you have the density available, you can solve for the aqueous concentration, and you get approx. $15 \cdot m o l \cdot {L}^{-} 1$. Note that here I careful to distinguish between aqueous ammonia, a solution of ammonia in water, with liquid or gaseous ammonia, a colourless gas at room temperature, that is very soluble in water.