Draw the atomic structure with electronic configuration of Potassium​

Answer:

Maybe c?

Explanation:

John Dalton was an English chemist, and Marie Curie was a physicist and chemist. The ideas of John Dalton and Marie Curie were based on scientifically gathered evidence. Thus, option C is correct.

John Dalton and Marie Curie are famous physicists and chemists. John Dalton is most known for introducing the theory of the atom and color blindness. He gave the theory of atomism based on the experimental setup.

Marie curie hugely contributed to the discovery of radioactivity and cancer research. She and her husband experimented and searched for the radioactive material.

Aristotle was a philosopher and established the relation between the various fields of sciences. He originated the idea of Alchemy by combining the four elements.

Therefore, John Dalton and Marie Curie proposed ideas based on research.

Learn more about Marie Curie here:

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Answer:

n = 0.045 mol.

Explanation:

Hello there!

In this case, according to the given problem, we can firstly set up the ideal gas equation as shown below:

[tex]PV=nRT[/tex]

Thus, as we are asked to calculate the moles, we proceed as follows:

[tex]n=\frac{PV}{RT}[/tex]

Therefore, we plug in the given data to obtain:

[tex]n=\frac{760mmHg*\frac{1atm}{760mmHg}*1.0L}{0.08206\frac{atm*L}{mol*K}*273K} \\\\n=0.045mol[/tex]

Best regards!

Answer:

it is b

Explanation:

b is the quarks for a proton

Answer:

B

Explanation:

Answer:

9.5 mol

Explanation:

Let's consider the unbalanced equation for the combustion of tetraethyl-lead (IV).

Pb(C₂H₅)₄ + O₂ ⇒ PbO + CO + H₂O

Pb atoms are balanced. We will balance C atoms by multiplying CO by 8.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + H₂O

Then, we will balance H atoms by multiplying H₂O by 10.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + 10 H₂O

Finally, we get the balanced equation by multiplying O₂ by 9.5.

Pb(C₂H₅)₄ + 9.5 O₂ ⇒ PbO + 8 CO + 10 H₂O

All in all, we need 9.5 moles of O₂ to burn 1 mole of Pb(C₂H₅)₄.

Answer:

the person that answered it with the link, dont click it's a virus

Explanation:

Answer:

On returning to lowest energy state which is stable, it releases energy in the form of light. Hence, option A that is the electron releases energy in the form of light on falling to lower energy state from excite state.

Answer:

Chemical reactions, chemistry, science as inquiry and data analysis. ... Students burn steel wool in both an open and closed environment to understand ... The difference in mass for this small sample of steel wool will be very small. ... careful attention to the balloon! 9. When rusting occurs the properties of the metal changes.

Explanation:

Answer: 1.72

Explanation:

Answer:

17.4 kJ

Explanation:

Answer:

capillaries

Explanation:

hope it helps if I'm not tell me right away.

Answer:

Carotid artery, Jugular veins

The chambers are explained below.

Explanation:

THE BLOOD VESSELS

The carotid artery carries red blood (oxygenated) to the head and the neck region and that obviously include the brain via the aorta. To be precise the internal carotid artery supplies oxygenated red blood cells to brain. The jugular veins carry deoxygenated red blood cells from the head back to the heart via the superior vena cava. The most important function of the jugular vein is to drain deoxygenated blood from brain.

THE CHAMBERS

The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle which also pumps the same oxygenated blood to the rest of the body through the aortic valve (aorta).

The right atrium receives deoxygenated blood from the body via the vena cava  and pumps the deoxygenated blood to the right ventricle which pumps the deoxygenated blood to be oxygenated by the lungs via the pulmonary valve (pulmonary artery).

CONCLUSION

The oxygenated red blood cells from the lung pass through the pulmonary vein through the left atrium to the left ventricle through the carotid artery (internal carotid artery) via the aorta to the brain and

The deoxygenated red blood cells in the brain are drained through the jugular vein via the superior vena cava to the right atrium, which pumps the deoxygenated blood to the right ventricle. From here the deoxygenated blood is pumped to the lungs via the pulmonary artery for oxygenation.

This is my answer, thus if I got your question right.

Answer:

1.50 mol N₂

Explanation:

Step 1: Write the balanced equation

2 NH₃(g) + 3 CuO(s) ⇒ 3 Cu + 3 H₂O(I) + N₂(g)

Step 2: Calculate the moles corresponding to 51.0 g of NH₃

The molar mass of NH₃ is 17.03 g/mol.

51.0 g × 1 mol/17.03 g = 2.99 mol

Step 3: Calculate the moles of N₂ produced from 2.99 moles of NH₃

The molar ratio of  NH₃ to N₂is 2:1. The moles of N₂ produced are:

2.99 mol NH₃ × 1 mol N₂/2 mol NH₃ = 1.50 mol N₂

Answer:

the sun's Rays strike Earth surface most directly at the Equator this focuses the race on a small area because be raised hit more directly the area is heated more

Explanation:

yw

Answer:

1.The reaction that opposes the change

Explanation:

Consider the reaction;

A + B ⇄ C + D

If a constraint such as a change in temperature, pressure or volume is imposed on this chemical system in dynamic equilibrium, the equilibrium position will shift so as to annul the constraint.

This shift in the equilibrium position will favour either the forward or reverse reaction depending on the type of constraint imposed on the system.

Hence, If a chemical system is at equilibrium, any change in the system will always result in an increase of the reaction that opposes the change.

Answer: Calcium

Explanation: an element need to reduce Iron in reaction.

Calcium is only metal in list which can reduce Iron

.500 mol ( 6.02x10^23 molecules/1 mol) = 3.01x10^23        

H⁣⁣⁣⁣⁣ere's l⁣⁣⁣⁣ink t⁣⁣⁣⁣o t⁣⁣⁣⁣he a⁣⁣⁣⁣nswer:

bit.[tex]^{}[/tex]ly/3a8Nt8n

Answer:

Explanation:

105.9888 g/mol

Answer:

105.9888 g/mol

Explanation:

You will add both the molar mass of each element multiply by the number of atoms present.

Answer:

NaOCl + H2O → HOCl + NaOH

so the mole fraction is = moles of NaOCl/(moles of NaOCl+moles of H2O)

so for 1.35 NaOCl it will require 1.35 moleof H2O

mole fraction = 1.35/(1.35+1.35)

mole fraction = 1/2 =0.5

is it correct i d ek but i tried :)

The mole fraction of the NaOCl is 0.0237

We'll begin by calculating the mole of solute (NaOCl) in the solution.

Mole = Molality x mass (Kg) of water

Mole of NaOCl = 1.35 × 1

Mole of NaOCl = 1.35 mole

Next, we shall determine the mole of water.

Mole = mass / molar mass

Mole of water = 1000 / 18.01

Mole of water = 55.52 moles

Finally, we shall determine the mole fraction of NaOCl.

Mole fraction = mole / total mole

Mole fraction of NaOCl = 1.35 / 56.87

Mole fraction of NaOCl = 0.0237

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Answer:

1.89 V

Explanation:

To calculate the standard cell potential, subtract the reduction potential of the anode from the reduction potential of the cathode.

So for your calculation,

-0.22 V - (-2.11 V)= 1.89 V

In the voltaic cell, current is produced by a  sponteanous chemical reaction. The standard cell potential here is 1.89 V.

A voltaic cell is a cell that produces current by a sponteanous chemical reaction. We are told here that X is the anode and Y is the cathode.

Now;

E°cell = E°cathode - E°anode

E°cell = (−0.22 V) - (−2.11 V) = 1.89 V

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Answer:

D.

Explanation:

NH3 (Ammonia) is a water soluble gas, and is polar. While C6H14 is non-polar and does not mix with water soluble.

Answer:

the hypothesis is false

Explanation:

it I rejected because the hypothesis has been tested severally and the answer still proves to be wrong

Answer:

probably the third option: The hypothesis is false

Explanation:

Answer:

P₂ ≅ 100 atm (1 sig. fig. based on the given value of P₁ = 90 atm)

Explanation:

Given:

P₁ = 90 atm                    P₂ = ?

V₁ = 18 Liters(L)              L₂ = 12 Liters(L)      

=> decrease volume => increase pressure

=> volume ratio that will increase 90 atm is (18L/12L)                                                                  

T₁ = 272 Kelvin(K)          T₂ = 274 Kelvin(K)

=>  increase temperature => increase pressure

=> temperature ratio that will increase 90 atm is (274K/272K)

n₁ = moles = constant    n₂ = n₁ = constant

P₂ = 90 atm x (18L/12L) x (274K/272K) = 135.9926471 atm (calculator)

By rule of sig. figs., the final answer should be rounded to an accuracy equal to the 'measured' data value having the least number of sig. figs. This means P₂ ≅ 100 atm based on the given value of P₁ = 90 atm.

Answer:

If you ever wonder why nails rust, it's because rusting happens when a metal is exposed to oxygen. The molecules of iron on the surface of the nail exchange atoms with the oxygen in the air and produce a new substance, the reddish-brown ferrous oxide, a.k.a. rust.

Explanation:

please mark this answer as brainliest

Answer: 30.08 g/mol

Explanation:

C2= 12.01 H6=1.01

12.01(2) + 1.01(6) =

24.02 + 6.06 =

30.08 g/mol

Answer:

Option (d) is correct.

Explanation:

Let [tex]x=10^2[/tex] and [tex]y=10^{-3}[/tex].

We need to find the value of [tex]\dfrac{x}{y}[/tex].

Put the values of x and y such that,

[tex]\dfrac{x}{y}=\dfrac{10^2}{10^{-3}}\\\\=10^2\times 10^3\ (As\ \dfrac{1}{x^{-a}}=x^a)\\\\=10^5\ (As\ x^a\times x^b=x^{ab})\\\\=1\times 10^5[/tex]

So, the required answer is equal to [tex]1\times 10^5[/tex]. Hence, the correct option is (d).

Answer:

Option D. G

Explanation:

In the energy profile diagram, the difference in the energy between reactant and product is called enthalphy Change (ΔH).

Mathematically, the enthalpy change (ΔH) is represented as:

Enthalpy change (ΔH) = Heat of product (Hₚ) – Heat of reactant (Hᵣ)

ΔH = Hₚ – Hᵣ

Considering the diagram given in question above, the difference in the energy of product and reactant is indicated by the letter G

Thus, option D gives the correct answer to the question.

Answer:

The specific heat is 0.25J/g°C

Explanation:

To solve this question we must know that the heat released for the metal is equal to the heat absorbed for the water. The equation is:

S(Metal)*m(Metal)*ΔT(metal) = S(water)*m(water)*ΔT(water)

Where S of metal is our incognite (Specific heat of metal)

m is the mass of the metal = 565g

ΔT is change in heat of the metal = 90.00°C - 34.40°C = 55.60°C

Specific heat of water = 4.18J/g°C

The mass of water = 200.0g

ΔT of water is 34.40°C - 25.00°C = 9.40°C

Replacing:

S(Metal)*565g*55.60°C = 4.18J/g°C*200.0g*9.40°C

S(metal) = 0.25J/g°C

Answer:

Electrons get farther from the nucleus.

Explanation:

By going from the top to the bottom of a group, the atomic number increases. That would mean that:

Ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.

Ionization energy refers to the energy required to remove an electron from  an atom. The ionization energy is a periodic trend that decreases down the group but increases across the period.

The ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.

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Answer:

2,4,6–trimethylheptanal

Explanation:

To name the compound given, we must first obtain the following:

1. Determine the functional group of the compound.

2. Determine the longest continuous carbon chain. This gives the parent name of the compound.

3. Identify the substituent group attached to the compound.

4. Locate the position of the substituent group.

5. Combine the above to obtain the name of the compound.

Now, we shall name the compound as follow:

1. The functional group of the compound is –CHO. Thus, the compound is an alkanal.

2. The longest continuous carbon chain is 7. Thus, the parent of the compound is heptanal.

3. The substituent group attached to the compound is methyl (–CH₃).

NOTE: There are 3 methyl groups attached to the compound.

4. The methyl groups attached to compound are located at carbon 2, 4 and 6.

5. Therefore, the name of the compound is:

2,4,6–trimethylheptanal