CHEMISTRY MIDDLE SCHOOL

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

the missing answer choice is 20

Answers

Answer 1

Answer:

The answer is 18

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

Answer 2

Answer:

18 i hope this helps

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5)» A change inmeans that a chemical reaction has occurred.

a. Atomic #= 3 b. Mass #=7 c. # of Protons = d. # of Neutrons = e. # of Electrons = E in Ist energy level = E in 2nd energy level = E in 3rd energy level = 0 # of Valence E = Li

Answers

I hope you can understand my writing :)

Why is it important to use 0 in measurement

Answers

Answer:

Example:

0.0001 = 1 x 10-4

you can you 0 for applying weight or volume

Answer:

Expressed in kilograms, the mass of 0.098kg should still have two important digits. 0 is essential because if you don't use the zero after the decimal point then you will be using the incorrect measurement.

Hope this helps.

- Que

In your own words describe the difference between the movement of particles in liquids and the movement of particles in gases.

Answers

In liquids, particles are slightly spaced from each other and move around somewhat freely, but still bump into each other. Gases on the other hand move randomly and rarely bump into each other, thus they are more spaced out.

Final answer:

In liquids, particles keep changing their neighbors while sliding past each other, confined to the shape of the vessel. In gases, particles are free, separated by large distances, and move rapidly in straight lines. Temperature is a measure of the average motion energy of the particles in both liquids and gases.

Explanation:

The movement of particles in liquids and gases is different due to their states of matter. In liquids, particles are held together by attraction, allowing them to slide smoothly past each other and change neighbors, but they remain confined to the shape of the vessel they are in. This is a less energetic state of movement.

On the other hand, in gases, particles are broken free of bonds. They travel in straight lines and are separated by large distances compared to their size, colliding with each other or the walls of the container. They are in a more energetic state and rapidly occupy all the accessible volume, hence gases can expand without limit to fill their containers.

At a microscopic level, the temperature of a liquid or gas is a measure of the average motion energy of the particles making it up - the hotter the liquid or gas, the more rapid the motion of its molecules or atoms.

Learn more about Particle Movement in Liquids and Gases here:

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It is true/falseit that when hydrogen cyanide, h c n , dissolves in water, the solution is weakly conducting and acidic in nature. This is because hydrogen cyanide, h c n is a blank that blank support the movement of charge. In addition, since specifically blank formed, the solution is blank.It is blank that when acetone, CH3COCH3, is dissolved in water conducting solution results. This is because acetone, CH3COCH3 is a blank that blank support the movement of charge

The words are:
True, false, weak electrolyte, strong electrolyte, non-electrolyte, does not, does, H+ is, OH- is, no ions are, acidic, basic, neutral.

Answers

Final answer:

HCN is a weak electrolyte that partially ionizes in water and forms an acidic solution as H+ ions are formed, while acetone is a non-electrolyte that does not form ions in water and the resulting solution is neutral.

Explanation:

It is true that when hydrogen cyanide, HCN, dissolves in water, the solution is weakly conducting and acidic in nature. This is because hydrogen cyanide, HCN, is a weak electrolyte that only partially ionizes in water, and hence does support the movement of charge, albeit to a lesser extent than a strong electrolyte. In addition, since H+ ions are specifically formed from the ionization of HCN in water, the solution is acidic.

It is false that when acetone, CH3COCH3, is dissolved in water a conducting solution results. This is because acetone, CH3COCH3, is a non-electrolyte. It does not ionize in water, and therefore does not support the movement of charge. As such, no ions are formed when acetone is dissolved in water and the solution remains neutral.

Learn more about Chemical Solutions here:

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Which of these is metamorphic rock formed from limestone? A.sandstone B.clay C.shale D.marble

Answers

D. Marble caused by heat and lots of pressure.

Answer:

Heres proof the first anwser is correct <3

Explanation:

Describe the structure of an atom. A)The nucleus is the dense center of the atom composed of protons and neutrons. Surrounding the nucleus is an electron cloud composed of electrons.

B)The nucleus is the dense center of the atom composed of electrons and neutrons. Surrounding the nucleus is an electron cloud composed of protons.

C)The electron cloud is the dense center of the atom composed of electrons. Surrounding the electron cloud is a nucleus composed of protons and neutrons.
Eliminate
D)The electron cloud is the dense center of the atom composed of protons and neutrons. Surrounding the electron cloud is a nucleus composed of electrons.

Answers

A is the correct answer I took this tes a few weeks ago.

Final answer:

An atom is structured into a central nucleus containing protons and neutrons, surrounded by an electron cloud that houses the electrons. This is similar to the solar system with the nucleus as the sun and the electrons as the planets revolving around it.

Explanation:

The structure of an atom is organized into two main parts: the nucleus and the electron cloud. The nucleus is the dense central part of the atom and is composed of protons and neutrons. Surrounding the nucleus, in various energy levels or orbits, is a space known as the electron cloud, which contains the electrons.

This structure can be related to the solar system where the nucleus represents the sun and the electrons depict the planets revolving around it. The correct statement that describes the structure of an atom, therefore is option A).