HELP MEEE
What is the identity of the atom shown?
A) Fluorine
B) Neon
C) Nitrogen
D) Potassium
15 POINTS​

Answer: Mg2+

Explanation:

Answer:

24 hours

Explanation:

There are 24 hours in a day cause that is how long for the earth to spin on its axis

Answer:

24 hours

Explanation:

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

Structure V reacts fastest with trimethylamine in SN2 reaction. Owing to less steric crowding in the transition state and ease of cleavage of the R - I bond

The question is incomplete, the complete question is shown in the image attache to this answer.

SN2 reaction is a type of nucleophilic reaction in which the nucleophile attacks the substrate from the reverse side. This is a synchronous reaction because the leaving group departs as the entering group attacks simultaneously in a hypervalent transition state.

SN2 reaction is favored by structure V owing to less steric crowding in the transition state and the easy of cleavage of the R - I bond. Hence, structure V reacts fastest with trimethylamine in SN2 reaction.

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Answer:

số đơn vị diện tích hạt nhân z là : 12 và 24

Answer:

Diamond has a giant molecular structure. Each carbon atom is covalently bonded to four other carbon atoms. A lot of energy is needed to separate the atoms in diamond. This is because covalent bonds are strong, and diamond contains very many covalent bonds.

Graphite on the other hand has flat layers of carbon atoms held by weak van der Waal's forces which makes Graphite a weak object and easily breakable.

As graphite contains layers of carbon atoms. The layers slide over each other easily because there are only weak forces between them, making graphite slippery. These electrons can move through the graphite, carrying charge from place to place and allowing graphite to conduct electricity.One valence electron of each carbon atom remains free, Thus making graphite a good conductor of electricity. Whereas in diamond, they have no free mobile electron. Hence there won't be flow of electrons That is the reason behind diamond are bad conductor electricity.These electrons are free to move between the layers in graphite, so graphite can conduct electricity.The forces between the layers in graphite are weak. This means that the layers can slide over each other.

Answer:

halogens group 7A on the periodic

table

Answer:

i think it's a sedimentary rock...

reason:- these are the only rocks containing fossils

Explanation:

brainliest plz

Answer:

Acidic oxide, so², So³, Co², Cl²O7

Basic oxide: CaO, MgO, Na O

Explanation:

An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.

Answer:

In fact, a fuel cell coupled with an electric motor is two to three is more efficient than an internal combustion engine running on gasoline.

Explanation:

Because hydrogen has a low volumetric energy density, it is stored onbaord a vehicle as a compressed gas to achieve the driving range of conventional vehicles.

Answer: group 7

Explanation:

Answer: both are mixtures , Brainliest please

Explanation:

Answer:

C) is the correct answer

Answer:

Oxygen Reacts with Iron to Form Rust is the Correct Answer

Answer:

b

Explanation:

mark me as brainliest have a great day

Answer:

3  1-butene, Z-2-butene, and E-2-butene.

Explanation:

Since 2-butene exists as two stereoisomers, three products are possible from the reaction of potassium ethoxide with 2-bromobutane. The products are, of course, 1-butene, Z-2-butene, and E-2-butene.

Answer: 1. (0.5 to 1)

              2. (Fluorine)

              3. (KNO3

              4. (Polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.)

              5. (Fe and S have a covalent bond, and S and O have covalent bonds, too.)

Explanation:

Ye, have great day.

The periodic table is an arrangement of elements according to their periodic properties.

Polar covalent bonds are those compounds in which unsymmetrical electron distribution in bonds leads to polarity in the molecule. Examples of such compounds include; HCl, CHCl3, etc. A polar covalent bond occurs when the electronegativity differences between atoms lies within the range of 0.5 to 1.

Since electronegativity increases across the period and we also know that highly electropositive metals(having very low electronegativity) and highly electronegative nonmetals(having high electronegativity)  form a strong ionic bond, it follows that fluorine (F) and cesium (Cs) will form a strong ionic bond.

A poly atomic ion is an ion that contains more than one atom. Given the options listed NH4^+ is an example of a polyatomic ion.

The difference between polar and nonpolar covalent bonds is that polar covalent bonds share electrons unequally, while nonpolar covalent bonds share electrons equally.

In FeSO4, Fe and S have an ionic bond, while S and O have covalent bonds.

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Answer:

when you heat the blend, you form iron sulfide, a compound

Depending on the ratio, you could form Fe4S3 or fool's gold

Explanation:When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change forming a compoundf

Answer:

They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)

Answer:

C. Particle size

Explanation:

The sand, which has smaller particles, will go through the sieve, while the rice (with a larger particle size) will not

Answer:

Explanation:

Hi! can you add the choices.

Answer:

communicate the important work you have done in lab

Explanation:

I believe this is correct! :D

Answer:

What reaction product would result if NaOH was used as a base in this reaction instead of K2CO3? If sodium hydroxide was used as the base of the reaction, then the reaction product formed would be an ethyl alcohol because it would undergo a hydrolysis reaction with addition of iodoethane

        The entire carbonation reaction demonstrates how potassium carbonate (K2CO3) combines with water and carbon dioxide to create potassium bicarbonate (KHCO3) when exposed to combustion flue gases at low temperatures (40 to 80 °C) (Reaction 1)

        In an extremely violent and exothermic reaction, potassium carbonate splits into potassium and carbonate ions when it interacts with water. When the ions interact, potassium oxide and carbonic acid are created.

         K2CO3 come from : Potassium carbonate is a common ingredient in the manufacture of soap and glass. Additionally, it serves as a light drying agent. This substance is used as a buffering agent in numerous wine making procedures. Another usage for potassium carbonate is as a fire extinguisher.

        K2CO3 created : Commercially, potassium carbonate is made by reacting potassium hydroxide with carbon dioxide:

2 KOH + CO2 = K2CO3 + H2.

        K2CO332H2O sesquihydrate crystallizes from the solution ("potash hydrate").

        The anhydrous salt is produced by heating this solid at 200 °C (392 °F).

         It disintegrates into K2O+CO2 around 1200 C. (allreaction)

         By converting carbonate into carbon dioxide and water, potassium carbonate can act as a base by forming potassium hydroxide.

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Answer:

A

Explanation:

it's Conventional Movement

Answer:

I believe the answer is B. Carbonates

Explanation:

The two observations you would make about the atoms are

These observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.

Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.

So,

The two observations you would make about the atoms are

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The mass of  chlorine gas produced by 14.5 grams of sodium chloride is 10.42 g.

The mass of  chlorine gas produced by 14.5 grams of sodium chloride is 8.81 g.

The given parameters;

In the reaction above, we can deduce the following;

molecular mass of 2Nacl = 2(58.44) = 116.88 g

molecular mass of 2NaF = 2(42) = 84 g

molecular mass of  Cl2 = 71 g

The mass of sodium fluoride produced by 14.5 grams of sodium chloride is calculated as follows;

116.88 g of NaCl --------------- 84 g of NaF

14.5 g of NaCl -------------------  ?

[tex]= \frac{84 \times 14.5}{116.88} \\\\= 10.42 \ g[/tex]

The mass of  chlorine gas produced by 14.5 grams of sodium chloride is calculated as follows;

116.88 g of NaCl --------------- 71 g of Cl2

14.5 g of NaCl ------------------- ?

[tex]= \frac{14.5 \times 71}{116.88} \\\\= 8.81 \ g[/tex]

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Answer:

1g Hydrogen

Explanation:

Calcium in water reacts vigorously to give a cloudy white Precipitate (compound) called Calcium hydroxide alongwith the evolution of Hydrogen gas.

[tex] \boxed{ \mathsf{Ca + H_2O \rightarrow Ca(OH)_2 + H_2}}[/tex]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

This reaction is not in it's balanced form! The number of atoms of Hydrogen on the left is 2 while that on the right is 4,I.e.,they're not equal.

Adding a 2 in front of H2O solves the problem by making the number of atoms of each element on both the sides equal.

[tex] \mathsf{Ca +2 H_2O \rightarrow Ca(OH)_2 + H_2}[/tex]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Looking into the equation more carefully, we see:

1 atom of Calcium reacts with 2 molecules of water to give 1 molecule of Calcium Hydroxide alongwith 1 molecule of Hydrogen gas.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Mass of one atom of Calcium = it's gram atomic mass

= 40 g

Mass of one "molecule" of Hydrogen

= it's Gram molecular mass

= gram mass of one atom × number of atoms in one molecule

= 1 × 2

= 2 g

So,

according to our observation:

One atoms of Calcium gives one molecule of Hydrogen (during the particular reaction)

=> 40g of Calcium gives = 2g of Hydrogen

•°• 1 g of Calcium gives = [tex] \frac{2}{40} [/tex]

= [tex] \frac{1}{20} [/tex] g Hydrogen

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

We're provided with 20g of Calcium,

=> 20g of Calcium gives = 20 × [tex] \frac{1}{20} [/tex] g H2

= 1 g H2

_______________

Hope this helps!