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tresset_1 [31]
3 years ago
5

All elements on the periodic table are________

Chemistry
1 answer:
Taya2010 [7]3 years ago
4 0

Answer:

Explanation:

arranged in order of increasing.

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What contains more than one pair of electrons?
Elis [28]

Answer: A Covalent Bond

Explanation:

5 0
3 years ago
Express the concentration of a 0.0320 M aqueous solution of fluoride, F−, in mass percentage and in parts per million (ppm). Ass
denis23 [38]

Answer:

607 ppm

Explanation:

In this case we can start with the <u>ppm formula</u>:

ppm=\frac{mg~of~solute}{Litters~of~solution}

If we have a solution of <u>0.0320 M</u>, we can say that in 1 L we have 0.032 mol of F^-, because the molarity formula is:

M=\frac{mol}{L}

In other words:

0.0320~M=\frac{mol}{1~L}

mol=0.032~M*1~L=0.032~mol

1~L~of~Solution=0.0320~mol~of~solute

If we use the <u>atomic mass</u> of F  (19 g/mol) we can convert from mol to g:

0.0320~mol~F^-\frac{19~g~F^-}{1~mol~F^-}~=~0.607~g

Now we can <u>convert from g to mg</u> (1 g= 1000 mg), so:

0.607~g\frac{1000~mg}{1~g}=607~mg

Finally we can <u>divide by 1 L</u> to find the ppm:

ppm=\frac{607~mg}{1~L}=~607~ppm

<u>We will have a concentration of 607 ppm.</u>

I hope it helps!

4 0
4 years ago
Under most conditions, an atom has the same number of protons and electrons.
Zepler [3.9K]

Answer:

True! Under most conditions, they are usually the same.

This is because to balance out the negativity or positivity of an atom, the opposite joins in.

Hope this helps.

3 0
3 years ago
Read 2 more answers
Please help!
Misha Larkins [42]
Your answer is D, OH-! correct me if I’m wrong.
4 0
3 years ago
Which answer accurately describes the difference between speed and velocity?
irakobra [83]
I think the correct answer from the choices listed above is the second option. The difference between speed and velocity would be that speed <span> requires distance. Velocity requires displacement. Speed only has a magnitude while velocity is a vector quantity which means it has direction and magnitude.</span>
5 0
3 years ago
Read 2 more answers
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