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2 years ago

During this reaction : P 4 + 5O 2 P 4 O 10 , 1.5 moles of product was made in 30 seconds. What is the rate of reaction?

Chemistry

2 answers:

Fudgin [204]2 years ago

6 0

Answer

Vr = 0.5mol / s

Explanation

To calculate the reaction rate we have to divide the amount of substance consumed and the time it was consumed.

Vr = mol / t = 1.5moles / 3s

Vr = 0.5mol / s

vlada-n [284]2 years ago

4 0

The rate of reaction is 0.050 mol·s⁻¹.

For the reaction

$P_4 + 5O_2 \longrightarrow P_4O_{10}\\$

$\text{rate} = \frac{\Delta P_4O_{10} }{\Delta t } = \frac{\text{1.5 mol }}{\text{ 30 s }} = \text{0.050 mol}\cdot \text{s}^{-1}\\$

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Answer:

D. It will decrease by a factor of 4

Explanation:

According to the question , the equation follows :

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Put the value of [A'] , [B'] and r' in the above equation:

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Divide equation (1) by (2) we , get

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B and B cancel each other

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Look in the question now, it is asked to calculate the concentration of [B],if cut in half

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[B']=1/2[B]

Insert the value of [B'] in equation (3)

$r'=[A]^{1}[B']^{2}$

$r'=[A]^{1}(\frac{1}{2}[B])^{2}$

$r'=\frac{1}{4}[A]^{1}[B]^{2}$ ............(a)

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