The molality of ch3coo- if 1 mole of ch3coo- is dissolved in 1 litre if amonia solvent density of nh3 solvent is 0.617gm/m

Question

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Answer 1

First, it should be written as CH3COO- (all caps).  The definition of molal is moles of solute per kg of solvent.

moles of solute = 1 mole

kg of solvent = 1 L x 1000 ml/L x 0.617 g/ml x 1 kg/1000 g = 0.617 kg

molality (m) = 1 mole/0.617 kg = 1.62 molal (to 3 significant figures)