Question

Concentrated ammonium hydroxide (aq ammonia) has a density of 0.90g/mL and is 28% by mass ammonia. Determine the molar concentration of ammonium hydroxide.
bobpursley
If it is 28 percent ammonia, then it contains .90*.28 grams ammonia/ml.

or in a liter, 900*.28 grams/liter

divide that by the mole mass of NH2, and you have molarity.
1.47

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