Question

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Answer 1

Answer:

2.10 molal

Explanation:

molality=no. of moles of solute÷ 1 kg of solvent

so, number of moles of solute = 189 ÷180 ,here 189 is given mass and 180 is absolute mass.

189÷180=1.05 moles

molality = 1.05÷ 500 ×1000=2.10 molal