Yo I need help with 1 and 2

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.

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Answer:

2, 4, and 5

Explanation:

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Answer:

2, 4, and 5

Explanation:

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Answer:

volume

Explanation:

it is always measured in volume

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

Answer:

the second one that is it

Explanation:

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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:

C: The shape of the pebbles is a result of weathering and deposition

Explanation:

For the several pebbles to have a rounded shape and smooth to the touch, it will undergo weathering and deposition. This is because weathering involves breaking down of rocks and creating new sediments. This weathering could be either chemical weathering or physical weathering where Chemical weathering is the decomposition of rocks which are caused by chemical reactions and which result in formation of new compound while physical weathering is the breakdown of rocks into smaller pieces. On the other hand, deposition occurs when the agents of erosion such as wind or water deposit sediments from one spot to another which in turn changes the shape of the land.

Thus, the shape of the pebbles are as a result weathering of the parent rocks and from deposition.

because there is not fire in the microwave

Answer:

Answers are numbered below:

Explanation:

"The three parts of the cell theory are as follows: (1) All living things are made up of cells, (2) Cells are the smallest units (or most basic building blocks) of life, and (3) All cells come from preexisting cells through the process of cell division..."

I hope this helps you! Have a great day!

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.

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Answer:

Temperature decreases and precipitation increases.

Explanation:

Temperature of Florida decreases and precipitation increases during a winter El Niño event. Due to El Niño event, precipitation occurs above average in Florida during Fall-Winter-Spring season. Storminess also increases during this El Niño event which increases the threat of severe weather in Florida during El Niño winters.

Answer: when Pacific waters cool, moving the tropical thunderstorms so that the wind shear in the Atlantic wanes during hurricane season

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

Answer:

25 g

10 cm

3

=

2.5 g/cm

3

Explanation:

Answer:

Soluble in water

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:

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:

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:

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:

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:

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:

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:

diselenium heptachloride

Explanation:

Se2Cl7

Se = selenium

Cl = chlorine

Don't forget the "-ide"

Diselenium heptachloride

Answer:

1) Dissolution of the copper anode

2) Time of the reaction

Explanation:

The figure shows the electrolysis of Copper Chloride using copper electrodes.

In aqueous solution, the ions present in the solution include:  H⁺, OH⁻. Cu²⁺ Cl⁻

The half equations for the reaction  are:

At rhe Anode (positive electrode) : 2Cl⁻(aq) - 2e = Cl₂(g)

At the Cathode (negative electrode) Cu²⁺ (aq) + 2e = Cu (s)

Hence copper ions are reduced at the cathode by gaining two electrons to form copper solid deposits. It is the mass of the deposited copper that the student measured over time.

Reasons why the actual mass is different  from the expected mass

1) Dissolution of the copper Anode: The electrodes used for this experiment are copper electrodes as both the positive and negative electrode.

Under the influence of an electric current, the copper anode will dissolve by gaining electrons and go into solution as copper II ions (Cu²⁺). thereby increasing the amount of copper ions in solution.

The aqueous copper ions from the anode and from the copper chloride (CuCl₂ (aq) electrolyte will migrate to the negative cathode, gain electrons, and get deposited as pure copper solid.  This increases the mass of copper solid deposited at the cathode.

2) Time: As the time of the reaction from zero to sixty (60) minutes under the influence of an electric current, more of the copper anode will dissolve, migrate to the cathode and get deposited as copper solid.

Hence as the time of the reaction increases, more of the copper ions will be deposited as copper solid thereby increasing the value of the actual mass of copper deposited.

Dissolving of copper and time are the two reasons for the different value to the expected value.

Dissolution of copper and less time are the two reasons for the different form the expected value because during the accumulation of copper on the anode some amount dissolved in the solution and not accumulated at the anode while on the other hand, time is also a factors which gives us different value as compared to expected value.

60 minutes are less time for the deposition of copper at the anode so if the time is extended then the value is same or near to the expected value so we can conclude that dissolving of copper and time are the two reasons for the different value to the expected value.

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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:

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:

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?