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Archy [21]
3 years ago
10

Find the molality of this aqueous solution 15.0% by mass kBr (119g/mol).

Chemistry
1 answer:
Vsevolod [243]3 years ago
3 0

Answer:

we will take a 100g sample of this solution for our convenience

so , there is 15 g kBr in this 100g solution

we know that molality is the number if moles of solute / mass of solvent in kg

we need to find the number of moles in 15g kBr

no of moles = 15/119 s

moles  = 0.126 moles/ 100g

multiplying both the numerator and the denominator by 10 to get 1 kg in denominator

=  1.26 moles / 1 kg

Hence, the molality is 1.26

would appreciate a brainliest

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