How many protons, neutrons, and electrons are in an atom of “SK?
24 protons, 19 neutrons and 19 electrons
19 protons, 19 neutrons, and 24 electrons
19 protons, 19 neutrons, and 19 electrons
19 protons, 24 ne lyons, and 19 electrons

Answer:

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.

Answer: when an electromagnetic field interacts with a magnet

Explanation:

The atomic mass of K is 39

from Avogadro's law

39g of K contains 6.02x10^23 atoms

therefore if

39=6.02x19^23

X=5.11×10^22

making X the subject of the formula

X= (5.11×10^22×39)÷6.02×10^23

X= 33g

The statement, that describes grams of potassium (K) contain 5.11 × \(10^{22}\) atoms is "33.1 g."

An atom is a fundamental particle of matter that contains at least one proton.

1 mole will be of 6.022 × \(10^{23}\) atoms

Then,

\(= 5.11*10^{22} \;atoms\;.\;\frac{1\;mol}{6.022*10^{23} \;atoms} \;.\;39.098\;g/mol\\\\= 33.171\;g\)

≈ 33.1 g

As a result, 33.1 g of K contains 5.11 × \(10^{22}\) atoms.

Hence, the correct option is 33.1 g.

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The balanced chemical equation is :

\(2CO_2->2CO+O_2\\\\\)

Moles of \(CO_2\) ,

\(n = \dfrac{100\ g}{44.01\ g/mol}\\\\n=2.27\ mol\)

Now, by given chemical equation , we can see 2 mole of \(CO_2\) react with 1 mole of \(O_2\).

So , 2.27 mole react with :

\(N=\dfrac{2.27}{2}\ mol\\\\N=1.135\ mol\)

Mass of oxygen is :

\(M = N \times 16\\\\M=1.135\times 16\ g\\\\M =18.16\ g\)

Therefore, mass of oxygen in grams produced is 18.16 g.

Hence, this is the required solution.

Answer: The first three elements i.e., C, Si & Ge form mostly the covalent compounds.

...

SALIENT FEATURES OF GROUP 14 (CARBON FAMILY) ELEMENTS.

Period 4

Element Germanium

Symbol Ge

Atomic number (Z) 32

Electronic configuration [Ar] 3d10 4s2 4p2

Explanation:

The group 14 components' basic electrical arrangement is ns₂ np₂. Two electrons can be found in these elements' outermost p orbitals. Group 14's elements all have four electrons in their outermost shell, giving them a valency of four.

The group 14 components' basic electrical arrangement is ns₂ np₂. Two electrons can be found in these elements' outermost p orbitals. Group 14's elements all have four electrons in their outermost shell, giving them a valency of four.

Group 14 of the p-carbon block's elements includes the elements carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl). These elements all have ns₂ np₂ electron configurations, meaning that there are only two electrons in the outermost p of each one.

Thus, Group 14's elements all have four electrons in their outermost shell, giving them a valency of four.

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Answer:

Wavelength

Explanation:

Pls give me Brainliest

Use Boyle's Law: P₁V₁ = P₂V₂. Since pressure and volume are inversely related and we're increasing the pressure, we should expect the new volume to be less than 2.60 liters.

Here, P₁ = 1.00 atm, V₁ = 2.60 liters, and P₂ = 3.50 atm; we want to find the new volume, V₂, at P₂. We can modify the equation to solve for V₂:

V₂ = P₁V₁/P₂ = (1.00 atm)(2.60 L)/(3.50 L) = 0.714 L

So the volume of the gas at a pressure of 3.50 atm will be 0.743 L.

6. 1 \(SO_{3}\) + 1 \(H_{2}O\) --> 1 \(H_{2} SO_{4}\)

8. 1 \(K_{2}O\) + 1 \(H_{2}O\) --> 2 KOH

12. 1 \(CdSO_{4}\) + 1 \(H_{2} S\) --> 1 CdS + 1 \(H_{2} SO_{4}\)

The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

100

Explanation:

The Keq for this reaction is 0.857.

The equilibrium constant Keq of a chemical reaction is described as the value of its reaction quotient at chemical equilibrium, a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change.

The Keq can be calculated using the ratio of the product concentrations to the reactant concentrations at equilibrium:

Keq = (H2O)(CO) / (H2)(CO2) = (0.094 mol) (0.094 mol) / (0.106 mol) (0.106 mol) = 0.857.

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Answer:

100 rbed  KJ |0| +2k

Explanation:

Answer:2523.75 g

Explanation:

(25 mols)* (100.95g/1 mol)= 2523.75g magnesium nitride

- molar mass of magnesium nitride is 100.95 g/mol

Answer:

the wall pushes back on you with a FORCE equal in strength to the force you exerted.

Answer:

heightens

Explanation:

The solid and the liquid coexist at the melting point, which is the point where the temperature remains constant during the phase transition.

In the given cooling curve, the melting point is at 50°C, indicated by the flat region on the curve between points C and D. At this point, the energy being released during cooling is used to overcome the energy required for the substance to transition from a liquid to a solid state.

Once all of the substance has solidified, the temperature begins to decrease again.

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Answer: all points on the curve between Q and S

Explanation: Where the graph looks like <-------->horizontal.

The amount of carbon dioxide in the air is increasing in a large city due to the growing number of vehicles. The mayor wants to plant more trees.  I totally agree with the mayor's suggestions.

Growing number of vehicles contributes towards carbon emissions into the atmosphere. Driving a car with gasoline as its fuel produces three carbon emissions. All of the emissions that take place across a company's value chain and are not covered by scope 2.

These emissions aren't caused by the business or the things it makes. Carbon emissions from operating a gasoline-powered vehicle are significant. Scope 3 applies since the product, not the company's machines, is what causes the emissions. There are three types of carbon emissions: 'Scope 1' or 'Direct Emissions' Direct GHG is produced at sources where the fuel is burned there and then. Examples of scope 1 emissions are personal automobiles and gas stoves. Planting more trees will result in minimizing the harmful effect of these gases upon the environment.

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The final pressure when the sample of gas is administered to the new volume and temperature is 0.64 atm.

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

To determine the final pressure of the gas, plug the given values into the formula above and solve for P₂.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = P₁V₁T₂ / V₂T₁

P₂ = ( 1.20 atm × 6.02L × 293.35K ) / ( 10.0L × 332.65K )

P₂ = ( 2119.1604 KLatm ) / ( 3326.5 KL )

P₂ = 0.64 atm

Therefore, the final pressure of the gas is 0.64 atm.

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Answer:The answer is c

Explanation:

The percent by mass of hydrogen in NH3 is 82.4%.

To find out the number of moles of hydrogen in 34 grams of NH3, first we need to find the number of moles of NH3 which can be calculated by dividing 34 grams by the molar mass of NH3 (17.0 grams/mol). Therefore, the number of moles of NH3 is 2 moles. As NH3 contains 3 moles of hydrogen per mole, the number of moles of hydrogen in 34 grams of NH3 is 2 x 3 = 6 moles.

Molecular mass of NH3 = 1 x atomic mass of N + 3 x atomic mass of H

= 1 x 14.01 + 3 x 1.01

= 17.03 g/mol

Mass percent of hydrogen in NH3 = (3 x atomic mass of H) / molecular mass of NH3 x 100%

= (3 x 1.01 g/mol) / 17.03 g/mol x 100%

= 82.4%

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Answer:

1. Zinc

2. Calcium

3. Francium

4. Phosphorus

5. Neon

Explanation:

Add the no. of electrons in each orbital. The sum is the atomic number of the element

Answer:

Vitamin A deficiency can result from inadequate intake, fat malabsorption, or liver disorders.

CO2 has a linear geometric shape due to the two sigma bonds between the carbon and oxygen valence electrons. Both oxygen molecules are sp2 hybridized meaning they both have one sigma bond and two pairs of un bonded electrons.

Answer:

what she saidlolbsbsjs

Answer: B Electronegativity

(A-p-e-x)

B. Electronegativity tells the most about the stability of a metal.

Electronegativity directs to the ability of an atom to attract the shared electrons in the covalent bond. The more increased the value of the electronegativity is, the more intensely that element attracts the shared electrons.

Electronegativity, symbolized as χ, stands for the tendency for an atom of a provided chemical element to attract shared electrons when creating a chemical bond. An atom's electronegativity is influenced by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

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The average speed :

1. 10.44 m/s

2. 10.42 m/s

3. 9.26 m/s

The distance 100 m have the greatest average speed

Given

Distance and time of runner

Required

Average speed

Solution

Average speed : total distance : total time

1. d = 100 m, t = 9.58 s

Average speed : 100 : 9.58 = 10.44 m/s

2. d=200 m, t=19.19 s

Average speed : 200 : 19.19 = 10.42 m/s

3. d=400 m, t = 43.18 s

Average speed : 400 : 43.18 = 9.26 m/s

The distance 100 m have the greatest average speed

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

After precipitation falls, the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

Therefore, Option C is the correct option.

Evaporation is defined as the process of conversion of liquid into vapours.

For example: Conversation of water into water vapours.

But int he question, there is no conversion. So this option is incorrect option.

Sublimation is the process of conversion of solid directly into the vapour phase

Since, there is no conversion of of solid into vapours. So, this option also incorrect option.

Mineralization is defined as the process through which chemicals which is present in organic matter are decomposed or oxidized easily in the available forms to plants.

As there is no decomposition of minerals. So, this is also incorrect option.

Percolation is defined as the process in which liquid slowly allow to pass through a filter.

So, this is correct option.

Thus, we concluded that the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

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Sodium carbonate, often referred to as Na2CO3, is a chemical compound composed of atoms of sodium (Na), carbon (C) and oxygen (O).

It is also sometimes called washing soda or soda ash. At room temperature, sodium carbonate is a white, crystalline solid that is very soluble in water. According to the chemical formula of the sodium carbonate molecule, Na2CO3, each molecule consists of two sodium atoms (Na), one carbon atom (C) and three oxygen atoms (O). The atomic configuration in sodium carbonate is shown in the given diagram.

A trigonal planar arrangement is formed when the central carbon atom is bonded to three oxygen atoms. The structure of sodium carbonate is completed by two sodium atoms joined to oxygen atoms.

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The chemical name for the compound CH3CH₂CH₂CH3 is butane.

Alkanes are any acyclic saturated hydrocarbon with a carbon to carbon single bond e.g. methane, ethane etc.

Alkanes have a general molecular formula of CnH2n+2. The number of carbon atoms determines the name of the alkane member.

According to this question, a chemical compound with the molecular formula; CH3CH₂CH₂CH3 is given. This compound posseses 4 carbon atoms and 10 hydrogen atoms, hence, is butane.

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An acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76.

The pH range over which an acetate buffer can effectively maintain pH depends on the pKa of the acid used and the concentration ratio of the acid to its conjugate base (acetate ion). Acetate buffer solutions are commonly prepared using acetic acid (CH3COOH) and sodium acetate (CH3COONa).

The pKa of acetic acid is approximately 4.76. In general, a buffer is most effective when the pH is within one unit of its pKa. Therefore, an acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76

Outside this pH range, the buffer may not effectively resist changes in pH, as the concentration of the acid and its conjugate base will be significantly imbalanced. At lower pH values, the acid concentration will dominate, while at higher pH values, the concentration of the acetate ion will dominate, leading to a diminished buffering capacity.

However, it's important to note that the exact pH range over which an acetate buffer can maintain pH effectively may vary depending on the specific concentration and preparation of the buffer solution.

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