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Aliun [14]
4 years ago
9

A graph of coal reserves in the United States versus time slopes downward.

Chemistry
2 answers:
Dafna1 [17]4 years ago
4 0

Answer:

increased

Explanation:

I believe to be increased ,because the coal is a natural resource to be used.

i really hope it helps

tatyana61 [14]4 years ago
3 0
I remember I had this question before on USA test prep and it’s increased
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An atom has radius of 227 pm and crystallizes in a body-centered cubic unit cell. What is the volume of the unit cell
sdas [7]

We will see that the volume of the unit cell is 144,070,699.06 pm^3

<h3>How to get the volume of a body-centered cubic unit cell?</h3>

In a body-centered cubic unit cell, the side length of the cube is given as:

S = \frac{4}{\sqrt{3} } *R

Where R is the radius of the atom.

And the volume of a cube is the side length cubed, then we can see that the volume of our cube will be:

V = S^3 = (\frac{4}{\sqrt{3} }*227pm)^3

Solving that we get:

V  = (\frac{4}{\sqrt{3} }*227pm)^3 = 144,070,699.06pm^3

This is the approximated volume of the unit cell.

If you want to learn more about unit cell structures, you can read:

brainly.com/question/13110055

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2 years ago
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5 0
4 years ago
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GarryVolchara [31]

Answer:

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4 0
3 years ago
Assign oxidation numbers to each element in this compound. NO
algol13

<u>Answer:</u>

NO ---> N +2 and O -2

<u>Explanation:</u>

Oxidation numbers are assigned to the elements of a compound to keep a track of the number of electrons each atom has.

Here we have a compound NO (Nitrogen Oxide). The Nitrogen is assigned an oxidation number of +2 while Oxygen in this compound is assigned an oxidation number of -2.

So the algebraic sum of the oxidation numbers of the elements in the compound NO is equal to zero.

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3 years ago
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