Which of the following is a possible definition of a base?

Select one:
a. A substance that increases the concentration of hydronium ions in a solution
b. A compound that is a hydrogen ion acceptor in an acid-base reaction
c. A substance that is an electron pair acceptor in a reaction
d. A compound that gives off hydrogen ions in a reaction or solution

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:

Explanation:

The cell cycle refers to the cell's lifecycle or the period of cellular growth and DNA replication. Mitosis represents the final step in the cell cycle—mitosis produces two identical daughter 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:

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:

1. K3P.

2. Potassium phosphide

Explanation:

During bonding of K^+1 and P^3-, there will be exchange of ions as follow:

K^+ + P^3- —> K3P

Therefore, the formula for the Ionic compound is K3P and the name of the compound is Potassium phosphide

The formula for this ionic compound  K3P. Potassium phosphide.

Thus, The inorganic semiconductor compound potassium phosphide has the formula K3P. It appears as a powder or solid with white crystals.

It reacts violently with water and is poisonous when ingested, inhaled, or absorbed via the skin.  Its shape is hexagonal and potassium phosphide.

White crystalline or powdered potassium phosphide is a solid. It might react strongly and catch fire if it comes into contact with water. It is harmful when ingested, inhaled, or absorbed via the skin. It is a component of other compounds.

Thus, The formula for this ionic compound  K3P. Potassium phosphide.

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Answer:

Then 85.3 [tex]\frac{kL}{sec}[/tex]=511,798,976.4 [tex]\frac{mL}{min}[/tex]≅ 5.118*10⁹ [tex]\frac{mL}{min}[/tex]

Explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

So,

[tex]x=\frac{c*b}{a}[/tex]

The direct rule of three is the rule applied in this case where there is a change of units.

You know:

Then:

[tex]85.3 \frac{kL}{sec} =85.3 \frac{1,000,000 mL}{0.0166667 min} =511,798,976.4 \frac{mL}{min}[/tex]

Then 85.3 [tex]\frac{kL}{sec}[/tex]=511,798,976.4 [tex]\frac{mL}{min}[/tex]≅ 5.118*10⁹ [tex]\frac{mL}{min}[/tex]

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:

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.

Answer:

set distances were electrons can be sensed.

Explanation:

Energy levels are set distances from the nucleus of the atom where electrons can be sensed. Electrons are small, negatively charged particles in the atom that pass through the positive nucleus in the center. The energy levels are a little like the steps of the stairs. You may stand on one step or the other, but not between the moves. The same thing goes with electrons. 

hope this helped!

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:

20

Explanation:

12 divide by 0.6 equal to 20 mean