which best describes a difference between prokaryotic and eukaryotic cells

Answer:

Rate depends on the rate constant. The rate constant depends on temperature and activation energy. If you have lower activation energy the rate will be higher. This is why catalysts are added since catalysts provide an alternate pathway that requires lower activation energy and catalysts are added to increase the rate of reaction.

Explanation:

This is only the answer if you were asking:

"Which corresponds to the faster rate: a mechanism with a small activation energy or one with a large activation energy?"

Thats what I understood about your question.

Answer:

are species formed by chemical reaction

Explanation:

example when one element react with other new thing which is formed called product

eg. when oxygen react with hydrogen gas we obtain water so water is the product.

Answer:

The products of a chemical reaction are the substances formed from the reaction of two reactants. Basically, they are what is produced from the reaction and are usually written on the right side of the yield arrow in an equation.

Answer:

The answer is C. An early theory describing properties of atoms

John Dalton published an early theory describing properties of atoms, thus the correct option is C.

An atom is defined as the smallest unit of matter that forms an element. Every form of matter whether it is solid,liquid , gas is made up of atoms . Each atom has a nucleus which is comprises of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral species and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged  speciesand hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.The early theory on atom was given by Dalton.

Thus,  the correct option is C.

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Answer:

20

Explanation:

12 divide by 0.6 equal to 20 mean

Answer:

1s²2s²2p⁶3s²3p⁵

Explanation:

Please see attached picture for working. (Answer using periodic table)

(See 2nd picture)

Alternatively, we can look at the subshell filling sequence.

Chlorine has 17 electrons.

So we start by filling the subshell with the lowest energy level, 1s.

The s subshell can fill a maximum of 2 electrons.

So what we have now is 1s²... with 15 electrons left.

Next, we look at the 2s subshell. Again, it can fill a maximum of 2 electrons.

1s²2s²... and we have 13 electrons left.

Moving on to the 2p subshell. The p subshell has 3 orbitals so it can fill a maximum of 6 electrons.

1s²2s²2p⁶... and we have 7 electrons left.

For the 3s orbital, it can fill another 2 electrons.

1s²2s²2p⁶3s²... 5 electrons to go!

Look at the 3p subshell. It can fill 6 electrons.

1s²2s²2p⁶3s²3p⁵

and we have obtained the electronic configuration of chlorine!

The electronic configuration of chlorine (CI) is 1s² 2s²2p⁶ 3s²3p⁵. None of the option is correct

Electronic configuration is defined as the arrangement of electrons in the orbital of an atom.

The s, p d, f notation has been the most widely used format in writing the electronic configurations of atoms.

Now, we shall write the electronic configuration of chlorine (CI). Details below:

Electronic configuration = 1s² 2s²2p⁶ 3s²3p⁵

Thus, the electronic configuration of chlorine is 1s² 2s²2p⁶ 3s²3p⁵. None of the options are correct.

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Answer:

Its particles have the highest average kinetic energy

Explanation:

This can be explained by the Kinetic Molecular Theory which explains the physical characteristics of solid, liquid, gas and how phases change from one to another.

The theory states the that average kinetic energy of particles is directly proportional to the temperature. When a solid is heated, its temperature and kinetic energy increase, eventually melting it into a liquid. If the temperature is raised even more, kinetic energy will increase even more and the liquid will eventually become a gas. This show that the gas has the highest temperature and hence the highest average kinetic energy compared to solid and liquid.

Answer:

Its particles have the highest average kinetic energy

Explanation:

This can be explained by the Kinetic Molecular Theory which explains the physical characteristics of solid, liquid, gas and how phases change from one to another.

Kinetic Energy ∝ Temperature

The theory states the that average kinetic energy of particles is directly proportional to the temperature. When a solid is heated, its temperature and kinetic energy increase, eventually melting it into a liquid. If the temperature is raised even more, kinetic energy will increase even more and the liquid will eventually become a gas. This show that the gas has the highest temperature and hence the highest average kinetic energy compared to solid and liquid.

Answer:

Check Explanation.

Explanation:

Magnesium and dilute hydrochloric acid react with each other to produce Magnesium Chloride and liberate hydrogen gas according to the reaction

Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)

The procedure to obtain pure magnesium chloride from the reaction is as thus

Step 1: Reaction

- Leave the dilute hydrochloric acid in a beaker.

- Add Magnesium slowly until it is in excess or until no more gas seem to be getting liberated.

Step 2: Filtration

- Filter with filter paper and funnel.

- Filter off the excess magnesium as magnesium chloride will be in aqueous form (liquid) and will come out with the filtrate. The residue is the excess magnesium.

Step 3: Crystallization to obtain solid crystals from the filtrate.

- Pour filtrate solution into evaporating dish/basin

- Provide heat using Bunsen burner

- Pour solution into an evaporating basin and heat over a water bath

- Stop heating when crystals start to form

allow water to evaporate until pure crystals remain.

- Dry crystals using absorbent paper or warm oven.

Precautions

- Use personal protective equipment such as gloves, a lab coat and wear eye protection, especially when heating.

- Avoid inhaling unnecessary gases during the whole process.

Hope this Helps!!!

Pure crystals of magnesium chloride using dilute hydrochloric acid can be prepared by using three steps, Reaction, Filtration, and Crystallization.

[tex]\bold {Mg (s) + 2HCl (aq) \rightarrow MgCl_2 (aq) + H_2 (g)}[/tex]

According to the reaction, when Magnesium react with dilute hydrochloric acid, produce Magnesium Chloride and hydrogen gas.

1: Reaction

Put dilute hydrochloric acid in a beaker and add Magnesium slowly  until no more gas seem to be produced. .

2: Filtration

3: Crystallization:

Therefore, pure crystals of magnesium chloride using dilute hydrochloric acid can be prepared by using three steps, Reaction, Filtration, and Crystallization.

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Answer:

Photodisintegration!

Explanation:

also called Phototransmutation, in physics, nuclear reaction in which the absorption of high-energy electromagnetic radiation (a gamma-ray photon) causes the absorbing nucleus to change to another species by ejecting a subatomic particle, such as a proton, neutron, or alpha particle.