Why doesn't the outer electron on the potassium atom experience the full charge of the protons in the nucleus (+19)?

Answer:

True

Explanation:

If it is the same element no matter the volume the density will be the same. Since both are the same substance, as long as both were in the same temperature and phase their density will be identical.

Answer:

There are 18 electrons shielding it from the nucleus

Explanation:

The shielding effect is the reduction in the effective nuclear charge on an electron, due to repulsion by the inner electrons in the atom.

Potassium has 19 electrons, 18 of which are in the inner shells of the atom. These 18 electrons "shield" the outermost electron from feeling the effect of the nuclear charge. The magnitude of effective nuclear charge felt by an electron as a result of screening by other inner electrons is given by Slater's rules.

Answer:

B

Explanation:

why is bc i passesd thia in school so i think this is it

3,5, and 1 i think maybe i uhm yeah

Answer:

250mL

Explanation:

Answer:

A because it's uniform

Answer:

a

Explanation:

Answer:

Burning yourself by touching boiling water would be conduction.

Explanation:

Why? I believe it would be because conduction means "transfer of" and the water is boiling and if you touch it, it burns you because it transfered heat to your skin causing you to feel a burning sensation.

Answer:

no animals have cells

Explanation:

cells are a theory made up by old scientists

Answer:

It has 3 subshells, it has 9 orbitals, and it has the capacity for 18 electrons

Explanation:

Answer:

50 years

12.5 g

2.5 g

Explanation:

The half-life is the time it takes for the sample to become half of the original.  At 0 years, none of the sample has decayed.  At 50 years, half of the sample has decayed.  This means that the half-life is 50 years.

If you look at the diagram, at 150 years, you will have 1/8 of the original amount.  If you start with 100 g, you will have 12.5 g after 150 years.

100/8 = 12.5

Looking at the diagram, you can see that at 100 years, you will have 1/4 of the original amount.  If you start with 10 g, you will have 2.5 g after 100 years.

10/4 = 2.5

Answer: F, K, Ba, Cr

Answer:

-3.72 (or -3.70 depending on what values you used)

Explanation:

First, use the molar mass of Cl2 convert the mass of Cl2 to moles.

1.48 g Cl2(1 mol70.906 g)=0.02087 mol Cl2

Note that we are given ΔH=−886kJ. This refers to the enthalpy change associated with the reaction of 5mol of Cl2 by the balanced equation shown below.

2P+5Cl2⟶2PCl5ΔH=−886kJ

Therefore, to determine the enthalpy change associated with the reaction of 1.48gCl2, divide ΔH by 5molCl2 to determine the enthalpy change per mole of Cl2, then multiply by 0.02087 mol Cl2.  (note: if you round up here to .021 mol of Cl2 you will get the final answer of -3.72 later)

0.02087 mol Cl2(−886 kJ5 mol Cl2)=−3.698 kJ

Rounding the answer should to three significant figures, we find that the enthalpy change associated with the reaction of 1.48gCl2 is −3.70 kJ.

Notice that coefficients in stoichiometric equations (indicating numbers of moles) are exact, so they do not constrain the number of significant figures.

The enthalpy change for the reaction when 1.48 g of Cl₂ reacts with excess P is –3.69 KJ.

We'll begin by calculating the number of mole of in 1.48 g of Cl₂. This can be obtained as follow:

Molar mass of Cl₂ = 2 × 35.5 = 71 g/mol

Mass of Cl₂ = 1.48 g

Mole = mass / molar mass

Mole of Cl₂ = 1.48 / 71

Finally, we shall determine the enthalpy change for the reaction. This can be obtained as follow:

2P + 5Cl₂ —> 2PCl₂  ΔH = −886 KJ

From the balanced equation above,

5 moles of Cl₂ reacted to produce an enthalpy change of −886 KJ.

Therefore,

0.0208 mole of Cl₂ will react to produce an enthalpy change of = [tex]\frac{0.0208 * - 886}{5}\\\\[/tex] = –3.69 KJ.

Thus, the enthalpy change for the reaction when 1.48 g of Cl₂ reacts with excess P is –3.69 KJ.

Learn more: https://brainly.com/question/11945461

The answer your looking for is most certainly B cause as a result Divergence sinking air high pressure and mixed with sinking air it produces high pressure for example when hot and cold air mix it makes a Tornado so B is your most selected option! UwU lol

The choice that best describes the movement of air at Earth's surface during a high-pressure system is divergence, sinking air. The correct option is B.

Divergence is one of the processes of movements of plates of the earth.  There are three processes by which the plates move. Divergence is the one where the two plates move toward each other.

Sinking air increase the pressure at the surface. They create high-pressure belts in the latitudes. When the air moves away from the poles, the pressure starts to decrease.

So, the remaining are convergence and rising air, they both create low-pressure belts. As we move upwards, the pressure decrease due to gravitational force.

Thus, the correct option is B.  divergence, sinking air.

To learn more about divergence and sinking air, refer to the link:

https://brainly.com/question/2935804

#SPJ6

Answer:

The pH of the resulting hydrochloric acid solution is 1.896

Explanation:

pH, short for Hydrogen Potential, is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH scale goes from 0 to 14. Values ​​less than 7 indicate the range of acidity and those greater than 7 indicate alkalinity or basicity. The value 7 is considered neutral.

pH is defined as the opposite of the base 10 logarithm or the negative logarithm of the activity of hydrogen ions  or hydronium ions (H₃O)., whose equation is

pH = -log [H⁺] = -log[H₃O⁺]

Then you must know the concentration of [H⁺] or [H₃O⁺]

A strong acid is one that dissociates completely, therefore, a quantity of H + ions are transferred to the solution. Since HCl is a strong acid, then [HCl] = [H⁺]

Being molarity the number of moles of solute that are dissolved in a certain volume, it is defined as:

[tex]molarity=\frac{moles of solute}{volume}[/tex]

So you must know the number of moles of HCl. Being its molar mass equal to 36.45 [tex]\frac{g}{mole}[/tex], then the following rule of three can be applied: if there are 35.45 grams of HCl in 1 mole, 0.9 grams of HCl in how many moles will they be?

[tex]moles of HCl=\frac{0.9 grams*1 mole}{35.45 grams}[/tex]

moles of HCl= 0.0254

Then, being the number of moles of solute 0.0254 and the volume 2 L, the molarity is:

[tex]molarity=\frac{0.0254 moles}{2 L}[/tex]

[tex]molarity=0.0127\frac{moles}{L}[/tex]

Then, the concentration of [HCl] is 0.0127 [tex]\frac{moles}{L}[/tex]. So [HCl] = [H⁺] = 0.0127 [tex]\frac{moles}{L}[/tex].

So the pH is calculated as:

pH = -log [H⁺]= -log 0.0127

pH= 1.896

The pH of the resulting hydrochloric acid solution is 1.896

Answer:

The answer you are looking for would be A

Explanation:

I took the test

Answer:

A.) It is the currently accepted atomic model.

Explanation:

edge 2021

Answer:

[tex]Total\ Distance = 190[/tex]

Explanation:

Given

[tex]Distance = \{30, 45, 50, 65\}[/tex]

Required

Determine the total distance

This is calculated by summing up the distance in each segment.

[tex]Total\ Distance = 30 + 45 + 50 + 65[/tex]

[tex]Total\ Distance = 190[/tex]

Answer:

Are there suppose to be answer choices?

Explanation:

Answer:

yes wind is nonliving because it has no form of life to it

Answer:

Volume reading rise to 58.37 mL

Explanation:

Given data:

Density of copper = 8.96 g/cm³

Amount of copper = 75.0 g

Volume of water in cylinder = 0.0500 L

Volume rise = ?

Solution:

First of all we will calculate the volume of copper. The volume rise up is equal to the volume of copper.

Formula:

d = m/v

8.96 g/cm³ = 75.0 g/ v

v =  75.0 g / 8.96 g/cm³

v = 8.37 cm³

cm³ = mL

Volume of water = 0.0500 L × 1000 mL / 1L

Volume of water = 50 mL

Volume reading rise to = 50 mL +  8.37 mL

Volume reading rise to 58.37 mL.

Answer:

The α‑helix is held together by hydrogen bonds between the amide N−H and C=O groups.

Disulfide bonds stabilize secondary structure.

Explanation:

Proteins have primary, secondary, tertiary and quartinary structures.

The secondary structure of a protein is the regular, recurring sequence of amino acid in a polypeptide chain. Secondary structure of proteins give rise to the folding observed in the structure of a protein.

The major secondary structures of a protein are α-helices and β-structures.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 620 g

volume = 850 mL

We have

[tex]density = \frac{620}{850} \\ = 0.7294117647...[/tex]

We have the final answer as

Hope this helps you

Answer:

Na is you answer! : ) - Good Day! ~

Answer:

Graduated cylinder vs Beaker

Both graduated cylinders and beakers are pieces of laboratory glassware that have a specific function. Graduated cylinders typically are more accurate at reading the volumes of the liquid inside. Beakers are better for stirring and mixing liquids

Explanation:

Electrons are able to "move" around the atom in set energy states in different orbitals, because the electrons "move" so fast around the nucleus where they are is just represented with an area of probability since their location and velocity cannot be measured with certainty. Protons and Neutrons are packed tightly in the nucleus held together by the strong nuclear force so they are not able to freely move.

Answer:

I believe it is boron.

Explanation: