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2 years ago

Poh of a solution with a ph of 5.00

Chemistry

1 answer:

creativ13 [48]2 years ago

8 0

Answer:

Explanation:

14-5.=pOH

- Hope that helps! Please let me know if you need further explanation.

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When the concentration of A in the reaction A ..... B was changed from 1.20 M to 0.60 M, the half-life increased from 2.0 min to

Reika [66]

Answer:

$0.4167\ \text{M}^{-1}\text{min}^{-1}$

Explanation:

Half-life

${t_{1/2}}A=2\ \text{min}$

${t_{1/2}}B=4\ \text{min}$

Concentration

${[A]_0}_A=1.2\ \text{M}$

${[A]_0}_B=0.6\ \text{M}$

We have the relation

$t_{1/2}\propto \dfrac{1}{[A]_0^{n-1}}$

$\dfrac{{t_{1/2}}_A}{{t_{1/2}}_B}=\left(\dfrac{{[A]_0}_B}{{[A]_0}_A}\right)^{n-1}\\\Rightarrow \dfrac{2}{4}=\left(\dfrac{0.6}{1.2}\right)^{n-1}\\\Rightarrow \dfrac{1}{2}=\left(\dfrac{1}{2}\right)^{n-1}$

Comparing the exponents we get

$1=n-1\\\Rightarrow n=2$

The order of the reaction is 2.

$t_{1/2}=\dfrac{1}{k[A]_0^{n-1}}\\\Rightarrow k=\dfrac{1}{t_{1/2}[A]_0^{n-1}}\\\Rightarrow k=\dfrac{1}{2\times 1.2^{2-1}}\\\Rightarrow k=0.4167\ \text{M}^{-1}\text{min}^{-1}$

The rate constant is $0.4167\ \text{M}^{-1}\text{min}^{-1}$

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2 years ago

What are metals that have been mixed together called

d1i1m1o1n [39]

Answer:

Alloys

I hope this helps!

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3 years ago

Which pair of atoms has the most polar bond? (1) H−Br (2) H−Cl (3) I−Br (4) I−Cl

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For the question given above, option 2 which is H-Cl pair of atoms has the most polar bond among the four of them.

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Answer:

Explanation:

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I’ll give brainlyiest (sorry if I spelled it wrong) to first correct answer

user100 [1]