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horsena [70]
3 years ago
9

A sample of substance X that has a mass of 326.0 g releases 4325.8 call when it freezes at its freezing point. If substance X ha

s a molar mass of 58.45 g/mol, what is the molar heat of fusion for substance X
Chemistry
1 answer:
o-na [289]3 years ago
6 0

Answer : The molar heat of fusion for substance X is, 775.6 cal/mol

Explanation :

First we have to calculate the moles of substance X.

\text{Moles of substance X}=\frac{\text{Mass of substance X}}{\text{Molar mass of substance X}}

Given:

Molar mass of substance X = 58.45 g/mole

Mass of substance X = 326.0 g

Now put all the given values in the above expression, we get:

\text{Moles of substance X}=\frac{326.0g}{58.45g/mol}=5.577mol

Now we have to calculate the molar heat of fusion for substance X.

\Delta H=\frac{Q}{n}

where,

Q = heat releases = 4325.8 cal

\Delta H = molar heat of fusion for substance X = ?

n = moles = 5.577 mol

Now put all the given values in the above expression, we get:

\Delta H=\frac{4325.8cal}{5.577mol}=775.6cal/mol

Thus, the molar heat of fusion for substance X is, 775.6 cal/mol

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Answer:

Li₂CO₃ ⇒ Li₂O + CO₂ is a decomposition reaction.

Explanation:

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In this case:

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OlgaM077 [116]

Answer:

El mismo nivel, pero diferente subnivel y orbital

Explanation:

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Si dos electrones tienen el mismo valor del número cuántico principal n, simplemente significa que están en el mismo nivel de energía.

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egoroff_w [7]

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<h3>What is substitution product?</h3>

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Therefore,The substitution product that is suppose to be favoured is The product with retention of configuration is expected to predominate slightly, because the leaving group blocks the nucleophile.

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