CHEMISTRY MIDDLE SCHOOL

What is the [H30+) in a solution with (OH'] = 2.0 x 10-3 m?2.0 x 10-3M
5.0 x 10-11M
2.0 x 10-12M
5.0 x 10-12 M
1.0 10-12 M

Answers

Answer 1
Answer:

Answer: 5.0 x 10-12 M

Explanation:

It is well known that; pH + pOH = 14.

pOH = - log [ OH-]

        =  - log [ 2.0 x 10 ∧-3]

        =  3 - log 2

        =   3  - 0.301 = 2.7 approximately.

recall that, pH + pOH = 14, therefore; pH = 14 - 2.7 = 11.3

pH= - log [ H3O+]

11.3 =  - log [H3O+], take the antilog of 11.3, gives us;

[H3O+] = antilog of - 11.3, which gives 5.0 x 10-12 M

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Any help is greatly appreciated!! :)

Answers

Answer:

The answer is: Can be first quarter moon or third quarter moon.

Explanation:

At first quarter moon and at third quarter moon we can see exactly half of the moon lit up. But, it depends on the place in the planet where you are, which side of the moon you see lit up in which stage of the moon. In the north, the left part of the moon is lit up in third quarter, while in the south is the righ part. An the same for the first quarter, where de right half of the moon is lit up for the north and for the south it is the left. So, the real answer is: For the north part of the world, it will be at third quarter, and for the south part, it will be at first quarter.

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Answers

The answer is; Heavy nuclei split into lighter nuclei


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Which of these materials is an example of a conductor? (of electricity)A.
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B.
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C.
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D.
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Answers

I think it would be wool fabric, D. Because when you get a piece of wool fabric and rub it against a balloon it creates static electricity. Hope I helped some :) 
Well its either A or D coz if u put like a live wire into water it eletrocutes everything in it but if you rub wool agaisnt a like balloon or something it creates static energy and friction sooo yea its probably the wool actually :)

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Answers

Answer:

Homozygous

Explanation:

Homozygous is a word that refers to a particular gene which possesses identical alleles on both homologous chromosomes. It is referred to by two capital letters (YY) for a trait that is dominant, and two lowercase letters (yy) for a trait that is recessive.

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Answers

Answer:

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Explanation:

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kinetic energy, hope that helps
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