Propose routes to the following compounds from propyl bromide and any necessary organic or inorganic reagents:

a. propyllithium
b. propylmagnesium bromide
c. propylzinc bromide
d. Dipropylzinc

Answer:

Reha should apply 540 N to lift Neha.

Explanation:

L = 360 N

LD  = 60 m

E =?

ED = 40m

NOW

L * LD = E * ED

360 *60 = E*40

21600/40 = E

540 N = E

Answer:

Primary pollutants can be emitted from many sources including cars, coal-fired power plants, natural gas power plants, biomass burning, natural forest fires, volcanoes, and many more. The effects of primary pollutants are of concern as they can be harmful to humans, animals and plants.Sep 3, 2018

Explanation:

A primary source results from the direct emissions from an air pollution source. In contrast, a secondary source results from the formation of a pollutant in the atmosphere from the chemical reaction of precursors emitted from air pollution sources.

Answer:

hydrogen is 1 element but has 2 atoms

Answer:

D. the electron has a neg. charge and is found outside of the nucleus.

Explanation:

the proton has a positive charge, while the neutron has no charge at all. both are found in the nucleus.

the electron has a negative charge, but stays outside of the nucleus in the electron cloud, constantly moving around.

Taking into account the constitution of an atom, the correct statement is "The electron has a negative charge and iş found outside of the nucleus."

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

Every atom consists of:

In other words, the atomic nucleus is the central part of the atom that is made up of protons and neutrons, while the orbitals or peripheral region is an area where electrons are found.

The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative charge, move around the nucleus at different energy levels and are attracted to protons, positive in the atom through electromagnetic force.

In summary, the correct statement is "The electron has a negative charge and iş found outside of the nucleus."

Learn more:

Answer:

These are the answers for the Atomic Number Quick Check

Explanation:

1. An element is highly conductive, highly reactive, soft, and lustrous. The element most likely belongs to which group?: alkali metals

2. How does mercury differ from other metals?: It is not solid under normal conditions.

3. Based on patterns in the periodic table, which element is the least malleable in its solid state?: phosphorus (P)

4. In which group of elements does tellurium (Te) belong?: metalloids

5. Which statement describes the properties of lanthanoids and actinoids?: They are malleable and lustrous, and they tend to conduct both electricity and thermal energy.

Hope this helps :)

Based on patterns of the periodic table, the chemical element which is the least malleable in its solid state is: D. Phosphorus (P).

A periodic table refers to an organized tabular arrangement of all the chemical elements, typically arranged in order of increasing atomic number or number of protons (in rows).

Phosphorus is denoted by the chemical symbol P and it is a chemical element with an atomic number of fifteen (15) and as such it is found in group five (5) of the periodic table.

Malleability is one of the chemical properties of a chemical element and it is simply a measure of it softness such as when hammered.

According to trends (patterns) of the periodic table, Phosphorus (P) is the chemical element which is the least malleable in its solid state.

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Three ways to represent atoms or atomic cations with 11 electrons include :

[tex] {Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } [/tex]

Mg = magnesium has 12 electrons in its neutral state, when it loses one electron to attain stability, it's election becomes 11.

Al = Aluminum has 13 electrons in its neutral state, when it donates 2 electron to attain stability, it becomes (13 - 2). = 11

Si = Silicon has 14 electrons on it's neutral state, when it loses 3 electrons to attain stability, we have (14 - 3) = 11

Hence,

[tex]{Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } [/tex]

are atomic cations with 11 electrons.

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Explanation:

Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.

Answer:

mark me as a brainlist answer i hope it will help you

Explanation:

Evolution means Gradual Development. It is a procedure in the gradual development in which species of different animal's, plants etc... leisurely started to change some of their activities or elements and it changes only due to some situations it changes over many generations also.

Answer:

A B and F

Explanation:

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what is the chemical formula of ( methane ) ??

[tex] \: [/tex]

Answer:

[tex]CH_4[/tex]

Explanation:

Methane is a chemical compound with the formula CH4. ( One atom of carbon and four atoms of hydrogen).

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Salt lowers the freezing point of water by interfering with the intermolecular forces of the water molecules, allowing for less interactions between water molecules.

The Freezing point is the temperature of a liquid at which it changes its state from liquid to solid at atmospheric pressure.

Salt molecules block water molecules from packing together when temperature is lowered. It then prevents them from becoming ice. More water molecules leave the solid phase than the ones entering the solid phase. Freezing point depression occurs when the freezing point of the liquid is lowered by addition of solute.

Hence, option B is correct.

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Answer:

true

Explanation:

I believe that is the correct answer (if right brainiest plz)

Explanation:

1 significant figure and 0 decimal

Part A; A stronger solution of sodium bicarbonate require more hydrochloric acid will be required

Part A; The reason why more HCl is required is due to the presence of more hydroxyl ions in the solution

The reason arriving at the above responses are as follows;

Part A

Sodium bicarbonate, NaHCO₃, is baking soda = A basic salt; has the capacity to deprotonate water

Hydrochloric acid, HCl = An acid

The reaction between sodium bicarbonate and hydrochloric acid is presented as follows;

NaHCO₃ + HCl → CO₂ + H₂O + NaCl

The equation for the ionic reaction is as follows;

Na⁺(aq) + HCO₃⁻(aq)  + H⁺(aq) + Cl⁻(aq)  → Na⁺(aq) + Cl⁻(aq) + H₂O(l) + CO₂(g)

In water, we have;

HCO₃⁻(aq) + H₂O(l) ⇄ H₂CO₃(aq) + OH⁻(aq)

The presence of a stronger solution of sodium bicarbonate, will produce more hydroxyl ions, OH⁻(aq), which will require, more HCl to neutralize

Therefore, if a stronger solution of sodium bicarbonate was used, more hydrochloric acid will be required

Part B

The solution of stronger sodium bicarbonate will contain a higher concentration of hydroxyl ions and therefore, require more HCl, to neutralize

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there are 6 orbitals are formed when six p- orbitals of benzene combine.

Answer:

you're righttttttttttttttttttttt

Answer:

yes because my class went over sum like that

Explanation:

Answer:

I think an atom changes from a ground state to an excited state by taking on energy from its surroundings in a process called absorption. The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed.

I hope this help you!:)

Answer:  The question is difficult to read.  Please add numbered lines and check before uploading the question.  I copied and organized the best I could, followed with my answers, below.

Explanation:

1. an element with a high electronegativity and an element with a single valence electron YES

2. an element with a high electronegativity and an element with a single valence electron Duplicate

3. an element with a high electronegativity and an element with a full shell of electrons NO

4. an element with a high electronegativity and an element with a full shell of electrons Duplicate

5. an element with a high electronegativity and an element with low reactivity NO

6. an element with a high electronegativity and an element with low reactivity Duplicate

7. an element with a high electronegativity and a second element with a high electronegativity NO

Elements have electronegativities because of the tendency of attracting electrons. An element with a single valence electron and high electronegativity will react with each other. Thus, option A is correct.

Electronegativity has been defined by the atom's tendency to attract the electrons that are in sharing for the formation of the chemical bond. The atomic number and the atomic radii affect electronegativity.

High electronegative elements are electron acceptors and are characterized by an almost full valence shell. The electron is required by them to achieve stability and complete octet. Elements with full shells cannot accept more electrons.

Therefore, option A. high electronegative element reacts easily with a valence electron to form a bond.

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Answer

b.

Explanation:

variable means change bro

Answer:

Its separates the components of heterogeneous mixtures.

like examples :-

Answer: In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.

Explanation:

Answer:

D. All pure substances are molecules.

The correct statement about pure substances is; "All molecules are pure substances."

A pure substance contains exactly the same type of atoms. In a molecule, there can only be a particular combination of atoms.

For instance, a molecule of HCl can only contain chlorine and hydrogen atoms.

This means that every molecules are also pure substances.

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Answer:

kausvsnks

Explanation:

bdjwkagsjwlak

Answer:

A cavity is a hole in a tooth that develops from tooth decay Cavities are permanently damaged areas in the hard surface of your teeth that develop into tiny openings or holes .They are caused by a combination of factors, including bacteria in your mouth, frequent snacking, sipping sugary drinks and not cleaning your teeth well.

these are in my own words

Answer:

The international system of units is basic on 7 units.