If 0.85 gm of NH3 is dissolved in 100 ml of solution.then find molality ( density of solution is 1.2 gm/ ml)

If 0.85 gm of NH3 is dissolved in 100 ml of solution.then find molalit

1.	If 0.85 gm of NH3 is dissolved in 100 ml of solution.then find molality ( density of solution is 1.2 gm/ ml)
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