WILL GIVE BRAINLIEST

Answer:

Outermost shell of magnesium ion has 8 electrons.

Explanation:

Mg + Cl → MgCl2

Mg electronic configuration  = [tex]1s^22s^22p^63s^2[/tex]

Cl  electronic configuration = [tex]1s^22s^22p^63s^23p^5[/tex]

In the third shell there are two electrons while in Chlorine there are 7 electrons.

The ions formed will be  Mg^+2 and Cl-

Since Magnesium has donated 2 electrons to form Mg^+2 ion now the its ionic electronic configuration becomes  

      Mg^+2 = [tex]1s^22s^22p^6[/tex] ( 2 , 8)

Therefore the outermost shell of magnesium ion has 8 electrons.

Answer:

I think the answer is A. I am only 50% sure I am correct, but hope it helps!

Explanation:

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 56 × 3.5

We have the final answer as

Hope this helps you

Answer:

25 g

10 cm

3

=

2.5 g/cm

3

Explanation:

Answer:  Check my answers.

Explanation:

There are four classes of macromolecules (polysaccharides or carbohydrates, triglycerides or lipids, polypeptides or proteins, and nucleic acids such as DNA & RNA). Carbohydrates and lipids are made of only carbon, hydrogen, and oxygen (CHO). Proteins are made of carbon, hydrogen, oxygen, and nitrogen (CHON).

Answer:

c. CH4 < NH3 because the NH bond is more polar than the CH bond.

Explanation:

Actually, the electronegativity difference between carbon and hydrogen is just about 0.4. This meager difference in electronegativity corresponds to a nonpolar bond between the two atoms.

However, the electronegativity difference between nitrogen and hydrogen is about 0.9. This larger electronegativity difference corresponds to the existence of a polar covalent bond between the two atoms.

Hence the N-H bond is significantly polar unlike the C-H bond. This implies that CH4 molecules are only held together by weak dispersion forces while NH3 molecules are held together by stronger dipole-dipole interactions and hydrogen bonds.

Answer:

CH4 < NH3 because the NH bond is more polar than the CH bond.

Explanation:

The source of alpha particles in a smoke detector is the Americium.

Answer:

2.89× 10²³ atom

Explanation:

Given data:

Number of atoms of Zn = ?

Number of moles of Zn = 0.48 mol

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atom

0.48 mol ×  6.022 × 10²³ atom / 1mol

2.89× 10²³ atom

Answer

D

Explanation:

The formula is going to be Products / Reactants.

That means only B and D can be correct. The balance numbers to the equation are the powers which means that the answer is D

Explanation:

P1V1 = nRT1

P2V2 = nRT2

Divide one by the other:

P1V1/P2V2 = nRT1/nRT2

From which:

P1V1/P2V2 = T1/T2

(Or P1V1 = P2V2 under isothermal conditions)

Inverting and isolating T2 (final temp)

(P2V2/P1V1)T1 = T2 (Temp in K).

Now P1/P2 = 1

V1/V2 = 1/2

T1 = 273 K, the initial temp.

Therefore, inserting these values into above:

2 x 273 K = T2 = 546 K, or 273 C.

Thus, increasing the temperature to 273 C from 0C doubles its volume, assuming ideal gas behaviour. This result could have been inferred from the fact that the the volume vs temperature line above the boiling temperature of the gas would theoretically have passed through the origin (0 K) which means that a doubling of temperature at any temperature above the bp of the gas, doubles the volume.

From the ideal gas equation:

V = nRT/P or at constant pressure:

V = kT where the constant k = nR/P. Therefore, theoretically, at 0 K the volume is zero. Of course, in practice that would not happen since a very small percentage of the volume would be taken up by the solidified gas.

Answer:

protons, neutrons and electrons

Explanation: Can you pls give be branily thanks*

Answer:

smaller particles?

Table salt (NaCl) is a compound. Every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as fixed composition.

Hope this helps! Please correct me if I'm wrong :)

Every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as " fixed composition".

A chemical compound has a predictable makeup. Every sample of a compound has almost the same composition, or even the identical proportion, by mass, of the components contained in the compound, as per Proust's reasoning.

Atomic building blocks make up molecules.

Therefore, every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as " fixed composition".

Hence, the correct answer will be option (B)

To know more about the molecule and fixed composition.

https://brainly.com/question/26835405

#SPJ2

Answer:

diselenium heptachloride

Explanation:

Se2Cl7

Se = selenium

Cl = chlorine

Don't forget the "-ide"

Diselenium heptachloride

Answer:

5%

Explanation:

Given parameters:

Volume of original acetone before dilution = 10ml

Volume of diluted solution = 200ml

Unknown:

Percent volume of acetone in the solution = ?

Solution:

To find the percent volume of acetone in the diluted solution, use the expression below;

 Percent volume of acetone = [tex]\frac{volume of original acetone}{diluted volume} x 100[/tex]

Insert the parameters and solve;

 Percent volume of acetone  = [tex]\frac{10}{200}[/tex]  x 100 = 5%

Answer:

volume

Explanation:

it is always measured in volume

Answer:

decomposition of water

Explanation:

The reaction will represent the decomposition of water. It usually carried by an electrolytic process in the laboratory.

Answer:

decomposition of water

Explanation:

i took the quiz and it was right

Answer:

A). 3 Mg, 2 P, 14 O, 12 H

Explanation:

Answer:

oTNT

Explanation:

Another name for the explosive dynamite is TNT, Trinitrotoluene.

Dynamite is an explosive that finds a wide range of application in many mining processes.

Answer:

T₂ = 317.87 K

Explanation:

Given data:

Initial pressure = 15 atm

Final pressure = 16 atm

Initial temperature = 298 K

Final temperature = ?

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

15 atm / 298K = 16 atm/T₂

T₂ = 16atm × 298 K / 15 atm

T₂ = 4768 atm. K / 15 atm

T₂ = 317.87 K

Answer:

2, 4, and 5

Explanation:

have a nice day:)

Answer:

2, 4, and 5

Explanation:

Hope this Helps!!!

please give me Brainlest

Answer:

The group that has high ionization energies but very weak electron affinities is the group 18, (VIIIa) which are the noble gases, the group of elements including; He, Ne, Ar, Kr, Xe, Rn, and Og in the column, at the far right corner of the periodic table

The electronic configuration of the noble gases show that they have the complete octet or 8 electrons (or duplet, 2 electrons, for helium) in their valence shell, therefore, they are relatively stable and seldom take part in chemical reaction which requires the transfer of electrons

Therefore, the noble gases have high ionization energies (require high amount of energies to remove an electron) and low electron affinity (they require an input of energy before an electron can attached to them)

Explanation:

The group having high ionization energies, but weak electron affinities is group 18 of noble gases.

Ionization energy can be defined as the amount of energy required for the removal of electrons. In noble gases, the elements have stable electronic configuration, they require a high amount of energy for removing an electron. Thus they have high ionization energy.

Electron affinity has been the energy required for the addition of an electron. The electron affinity for the addition of electrons has been zero as they are stable elements, and do not require the addition of an electron.

For more information about ionization energy, refer to the link:

https://brainly.com/question/16243729

Answer:

B

Graph 1 is An endothermic reaction and graph 2 is an exothermic reaction

Answer:

A. It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter

Explanation:

The work done when a force of 1 newton is applied to an object for a distance of 1 meter is called as joule. Therefore, option A is correct.

The term work done is defined as whenever work is done, energy is transferred.

To move an object, it must be converted into energy. The method of force can be used to transfer energy. Work done is the amount of energy transferred by a force to move an object.

Work can be calculated using the formula: Work = Force Distance. The joule (J) or Newton meter (N m) is the SI unit for work. One joule is the amount of work done when one Newton of force moves an object one meter.

Thus, The work done when a force of 1 newton is applied to an object for a distance of 1 meter is called as joule, option A is correct.

To learn more about the work done, follow the link;

https://brainly.com/question/13662169

#SPJ2

Answer:

Your muscles require extra oxygen when you workout, about three times as much as the resting muscles. This need implies that the heart begins to pump harder, which allows for a faster pulse. Your lungs, meanwhile, draw in more oxygen as well, hence the harder breathing.

Explanation:

when you exercise, your heart starts pumping blood faster, which eventually makes your pulse faster.

Answer:

126.86

Explanation:

Given parameters:

1x - percent abundance = 80%(0.8), mass = 127

2x - percent abundance = 17%(0.17), mass = 126

3x - percent abundance = 3%(0.03) , mass = 128

Unknown:

Average atomic mass = ?

Solution:

The average atomic mass is the average of all isotopes of element. It can be calculated using the expression below;

RAM  = (mass x abundance of 1x) + (mass x abundance of 2x) + (mass x abundance of 3x)

Now insert the parameters and solve;

RAM = (127 x 0.8) + (126 x 0.17) + (128 x 0.03)  = 126.86

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Here is an image to prove that this is correct. Did on Edge

Answer:

1. Alchemy

2.Alloy

3.Atom

4.Compound

5. Element

6. Metal

7. Non metal

Explanation:

1. An ancient study or art which attempted to combine science and philosophy to solve worldly problems is alchemy

2. A homogeneous mixture of elements with metals to form metallic solids is an alloy

3. The simplest unit of an element that still retains the properties of that element compound is an atom.

4. Two or more elements joined together such that the elements have lost their individual identity element is called a compound

5. A primary substance that cannot be divided into separate substance is an element

6. The group of elements that are good conductors of electricity and heat is called a metal

7. The group of elements that are poor conductors of electricity and heat are called non metals.

Answer:

4.08

Explanation:

Answer:

A

Explanation: