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RSB [31]
3 years ago
6

sample of substance X has a mass of 326.0 g releases 4325.8 cal when it freezes at its freezing point. If substance X has a mola

r mass of 58.45 g/mol, what is the molar heat of fusion for substance X?
Chemistry
2 answers:
Serhud [2]3 years ago
8 0

Answer:

C. 775.6 cal/mol

Explanation:

To put it straight forward

ELEN [110]3 years ago
5 0
Number of moles ( substance x ):

1 mole --------- 58.45 g/mol
? mole --------- 326.0 g

326.0 x 1 / 58.45 => 5.577 moles

 heat of fusion:

hf = Cal / moles

hf = 4325.8 Cal / 5.577 moles

hf = 775.65 cal/mol

hope this helps!
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