2 years ago

Which is defined as moles of solute per liter of solution?

Chemistry

2 answers:

pshichka [43]2 years ago

6 0

A. Molarity . Explaining about Moles

nordsb [41]2 years ago

6 0

The answer is A. Molarity

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Answer:

a. 113 min

Explanation:

Considering the equilibrium:-

2N₂O₅ ⇔ 4NO₂ + O₂

At t = 0 125 kPa

At t = teq 125 - 2x 4x x

Thus, total pressure = 125 - 2x + 4x + x = 125 - 3x

125 - 3x = 176 kPa

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Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

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$[A_0]$ is the initial concentration

Given that:

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Final concentration $[A_t]$ = 91 kPa

Time = ?

Applying in the above equation, we get that:-

$91=125e^{-2.8\times 10^{-3}\times t}$

$125e^{-2.8\times \:10^{-3}t}=91$

$-2.8\times \:10^{-3}t=\ln \left(\frac{91}{125}\right)$

$t=113\ min$

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