Explain how to separate a mixture of sand and pebbles.

Chemistry

1 answer:

Dimas [21]3 years ago

7 0

You could use a strainer, and let the sand fall out while pebbles stay in.

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Help please. I only need the concepts.

melomori [17]

Boyle’s = increase as volume decreases

Charles = increases and pressure increases

Gay-lussacs = increases as pressure increases

5 0

3 years ago

Draw three different Lewis structures that could be possible for ZX2, assuming that Z is the central atom and that X is not hydr

Mariana [72]

Answer:

See images attached and explanation

Explanation:

I have drawn three possible structures of ZX2. We have to remember that the shapes of molecules could be predicted on the basis of the Valence shell electron pair repulsion theory.

The number of electrons on the valence shell of the central atom determines the shape of the molecule. We have also been told that X is not hydrogen.

If the two X atoms are arranged at a bond angle of 180 degrees, we could have either structure I or II. We will have these structures if the Z atom is sp2 hybridized.

Similarly, if the Z atom is sp3 hybridized, we may have structure III in which the molecule is bent with a bond angle less than 109 degrees. This may result from the presence of a lone pair on Z.

Note that all these structures obey the octet rule.

3 0

3 years ago

THANK REAL HARD...... DO YOU THINK A TREE AND A BUSH IS THE SAME THING??????/ THE BOTH DO THE SAME THING SO ARE THEY THE SAME TH

kramer

Well, trees are over 20 feet tall and have trunks that are like in 2 inches and 4.5 feet about the ground. Bushes are smaller than the trees and usually have smaller, woody, bark leafs.

Well im gonna say it would be the same,but not in size.

Hope this helps

8 0

3 years ago

Read 2 more answers

A bowler lifts her bowling ball a distance of 0.5 meters using 35 joules of energy. If, on Earth, a 1.0 kilogram mass weighs 9.8

kherson [118]

Answer:17.5

Explanation: (0.5 meters)(35 Joules) =

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3 years ago

What are the Respiration effects on the pH?

WITCHER [35]

Our blood have a pH around the 7.0, when we hold the breath our cells still breathing, and the release $CO_2$ , this compound react with water (hydrolysis).

$H_2O+CO_2\leftrightharpoons H_2CO_3$

This compound formed by this reaction is acid, carbonic acid.

Them the pH will get lower them normal, and our buld send an action to our body, and this reaction will be the <span>breathing.</span>

3 0

3 years ago