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3 years ago

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What is the molarity of a solution containing 9.0 moles of solute in 2500 ml of a solution

1 answer:

Lena [83]3 years ago

7 0

M=(mols/L) so M=(9.0/2.5) which is 3.6M

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Which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell

Anvisha [2.4K]

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3 years ago

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<u>Answer:</u> The value of $\Delta H$ for the reaction will be -537 kJ

<u>Explanation:</u>

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Molar mass of hydrogen gas = 2 g/mol

Putting values in above equation, we get:

$\text{Moles of hydrogen gas}=\frac{0.647g}{2g/mol}=0.324mol$

We are given:

Energy released for 0.324 moles of hydrogen reacted is 174 kJ

For the given chemical reaction:

$H_2(g)+F_2(g)\rightarrow 2HF(g)$

By Stoichiometry of the reaction:

When 0.324 moles of hydrogen gas is reacted, the energy evolved is 174 kJ

So, when 1 mole of hydrogen gas will react, the energy evolved will be = $\frac{174kJ}{0.324mol}\times 1mol=537kJ$

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

Hence, the value of $\Delta H$ for the reaction will be -537 kJ

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Answer:

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2 years ago

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Answer:

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Explanation:

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As we know that

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3 years ago

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tensa zangetsu [6.8K]

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