What can fossils tell us about movements of the plates in the past

Answers

Answer 1

Answer: It can tell us how old they are and how and where they moved in the past.

Answer 2

Answer: It will tell you what continents were together in the past...

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How many atoms are in Na2CrO4

Answers

We have that for the Question "how many atoms are in Na2CrO4" it can be said that The total number of atoms is

X=7 atoms

From the question we are told

how many atoms are in Na2CrO4

Generally

In identifying the atoms are in Na2CrO4 we must first look closely at the compound Na2CrO4

We have

Na=1

Cr=2

O=4

Therefore

The total number of atoms is

X=1+2+4

X=7 atoms

For more information on this visit

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The formula shows the number of each type of atom in the molecule. There are 2 atoms of sodium, one atom of chromium and four atoms of oxygen, being a total number of 7 atoms.

A nonaqueous solution has a solvent that is not water. Which is an example of a nonaqueous solution?

Answers

Answer:

Tincture o iodine.

Explanation:

If a solute is dissolved in a solution that is not water for example, alcohol, ether, carbon disulphide, Carbon tetrachloride and many other carbon based liquids, the resulting solution is classified as a non aqueous solution.

An example of such a solution is tincture of iodine made by dissolving in 1 liter alcohol.

The molarity of iodine is approximately 0.53M

The solution is largely used as a sore disinfectant.

Answer: B

Explanation: on Edg

Consider the following reversible reaction. 2H2O(g)<—>2H2(g)+O2(g) What is the equilibrium constant expression for the given system?

Answers

Answer : The equilibrium constant expression will be,

$k_(eq)=([H_2]^2[O_2])/([H_2O]^2)$

Explanation :

The given balanced chemical reaction is,

$2H_2O(g)\rightleftharpoons 2H_2(g)+O_2(g)$

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

The concentrations of pure solids are constant that is they do not change. Thus, they are not included in the equilibrium expression.

So, the equilibrium constant expression will be,

$k_(eq)=([H_2]^2[O_2])/([H_2O]^2)$

Answer: D

Explanation:

Which requires the removal of heat, melting or freezing?Is it evaporation? What is it? Why?

Answers

Freezing. If you take away energy from something, (lower its temperature), it will freeze. If you add heat to something, it will melt if it is a solid and evaporate if it is a liquid.

When you add energy to something, the atoms which comprise the substance jiggle and vibrate, meaning that on a large scale, a solid will become a liquid, and a liquid will become a gas.

Freezing, just think about it, the colder it gets the more likely there is going to be snow/ hail/ ice

Hydrogen is a liquid below what temperature?a.
100 degrees C
c.
-183 degrees C
b.
-253 degrees C
d.
0 degrees C

Answers

Answer:

The hydrogen exist as a liquid at -253 degree C.

Explanation:

Hydrogen is found as a molecular form H2. In order to become liquid , it must be cooled below its critical temperature. It become liquid at -253 degree C or 423.17 degree F or 20.8 K.

So hydrogen become liquid at -253 degree Celsius.

Hydrogen is a liquid below -253 degrees C

PLZ HURRY!!!!using the following data set what is the mean of the loose soil?

the missing answer choice is 20

Answers

The answer is 18

You add each water amount of loose soil and divide by 3

18 i hope this helps

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