Can you Guys please help me on 14,and 15

Chemistry

2 answers:

jok3333 [9.3K]3 years ago

7 0

14. is a and i think 15. is b

lys-0071 [83]3 years ago

7 0

I am nowhere sure, but I think it is: 14;D, 15;C, Chemistry is not my best subject.

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3 years ago

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Rudiy27

For an aqueous solution of MgBr2, a freezing point depression occurs due to the rules of colligative properties. Since MgBr2 is an ionic compound, it acts a strong electrolyte; thus, dissociating completely in an aqueous solution. For the equation:

ΔTf = (Kf)(m)(i)
where:
ΔTf = change in freezing point = (Ti - Tf)
Ti = freezing point of pure water = 0 celsius
Tf = freezing point of water with solute = ?
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i = ions in solution = 3

Computing for molality:
Molar mass of MgBr2 = 184.113 g/mol

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Answer:

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