An unexcited atom has its most energetic two electrons in the 3s orbital. How many electrons does it have?.
Answers
An unexcited atom that has its most energetic two electrons in the 3s orbital is commonly called the ground state of the atom. An atom is a basic building block of matter and consists of protons, electrons, and neutrons.
An atom has a nucleus in its center, which is made up of protons and neutrons, while electrons revolve around the nucleus in different shells. The 3s orbital is a spherical orbital that can accommodate a maximum of two electrons, and it is considered one of the highest energy orbitals for an atom in the ground state. When an electron absorbs energy, it moves to an orbital with a higher energy level. The higher the energy level of an electron, the farther it is from the nucleus. If an atom has more than two electrons, some of them will be located in lower energy orbitals, such as the 1s and 2s orbitals.
An unexcited atom has its most energetic two electrons in the 3s orbital, and it is assumed that it is a neutral atom because it has equal numbers of protons and electrons. Therefore, the atom has two electrons in the 3s orbital and an undetermined number of electrons in other orbitals based on the element. As a result, the number of electrons in an unexcited atom with its most energetic two electrons in the 3s orbital varies depending on the element.
An unexcited atom has its most energetic two electrons in the 3s orbital, which is considered one of the highest energy orbitals for an atom in the ground state. The number of electrons in an unexcited atom with its most energetic two electrons in the 3s orbital varies depending on the element, but it has two electrons in the 3s orbital and an undetermined number of electrons in other orbitals based on the element.
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Related Questions
Within a double-stranded dna molecule, an a on one strand is paired with a g on the other. Which dna repair mechanism would most likely correct this error?.
Answers
Within a double-stranded DNA molecule, an A on one strand is paired with a G on the other strand. The DNA repair mechanism most likely to correct this error is a mismatch.
What is base mismatch fix?Mismatch base repair is DNA repair caused by base pairing errors during replication. When the cell will divide, the DNA in it will undergo replication or duplicate so that the two daughter cells have the same DNA. In this replication, base pairing errors sometimes occur so that the results do not match the template of the parent DNA. With the help of the polymerase enzyme, this gap will be filled by a new segment carrying the repaired base, which is then attached with the help of the ligase enzyme.
Adenine always pairs with thymine (A-T), while cytosine always pairs with guanine (G-C).
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calcium reacts with sulfur forming calcium sulfide. what is the theoretical yield (g) of cas(s) that could be prepared from 7.72 g of ca(s) and 2.04 g of sulfur(s)?
Answers
Theoretically, 7.72 g containing ca(s) as well as 2.04 g of even more sulfur may be combined to produce 2.88 g of cas(s) (s).
Describe sulfur.Among the most rectifiers is sulfur (S), sometimes spelt as sulfur, a nonmetallic chemical element in the oxygenation member (Group 16 [VIa] of the atomic numbers). Natural sulfur is a pale yellow substance that is brittle, flavorless, and odorless.
Where can you find sulfur?Sulfur can be found naturally and now in metal bauxite ore. Natively, it can be found close to hot springs and volcanoes. The tenth most prevalent element, selenium is found in asteroids, the ocean, the crust of the earth, and the atmosphere.
balanced equation,
Ca + S ---> CaS
stoichiometry of Ca to S is 1:1
= Ca moles - 1.6 g/ 40 g/mol
= 0.04 mol
= S moles - 4.25 g / 32 g/mol
= 0.13 mol
stoichiometry of Ca to CaS is 1:1,
= CaS moles formed - 0.04 mol
= mass of CaS - 0.04 mol x 72 g/mol
theoretical yield = 2.88 g
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define effervesence
Answers
Answer:
is the getting out of a gas in a water solution or it the property of forming bubbles
A Flame test is an example of chemistry property. What evidence can you use to back your statement up?
Answers
5. The salts you tested were held together by ionic bonds. The compounds were made of two types of ions, positive and negative, that were attracted to each other because of their opposite charges. Some ionic bonds take more energy to break. Based on your investigation, which compounds have bonds that require the most energy to break?
Answers
Answer:
Lithium Iodide , Sodium Fluoride, Sodium Chloride, Sodium Bromide , Sodium Iodide, Potassium Fluoride and Potassium Chloride are the examples of ionic compounds.
Explanation:
Ionic compounds have bonds that require the most energy to break because of strong attractive force between them. According to scientists, about 700 to 4000 Kilo Joules energy is required to break bonds between ionic compounds whereas 800 to 1000 kilo joules energy is needed by the compounds having covalent triple bonds. So ionic compounds needs the most energy to break.
how many carbons are in cholesterol
Answers
Answer:
Cholesterol is a 27 carbon
If an ideal gas at a constant temperature is initially at a pressure of 3.8 atm and is then allowed to expand to a volume of 5.6 L and a pressure of 2.1 atm, what is the initial volume of the gas?
Answers
Answer:
The most common example is the molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 L for 1 mole of any ideal gas at a temperature equal to 273.15 K and a pressure equal to 1.00 atm.If an ideal gas at a constant temperature is initially at a pressure of 3.8 atm and is then allowed to expand to a volume of 5.6 L and a pressure of 2.1 - 18914… ... of 5.6 L and a pressure of 2.1 atm, what is the initial volume of the gas? ... An ideal gas is at a pressure of 1.4 atm and has a volume of 3 L.
Explanation:
I hope I help :)
What volume would 56.2 mL of gas at 820 mm of Hg occupy at 720 mm of Hg?
Answers
Answer:
49.35 mL
Explanation:
Given: 56.2 mL of gas
To find: volume that 56.2 mL of gas at 820 mm of Hg would occupy at 720 mm of Hg
Solution:
At 820 mm of Hg, volume of gas is 56.2 mL
At 1 mm of Hg, volume of gas is \(\frac{56.2}{820}\)
At 720 mm of Hg, volume of gas is \(\frac{56.2}{820}(720)=49.35\,\,mL\)
13. PLEASE HELP
The volume of a gas is 4.0 L, the pressure is 1 atm, and the temperature is 200 K. A chemist
changes one factor while keeping another constant so that the new volume is 5.0 L. Which of
the following could be the new conditions? (4 points)
The final pressure is 0.8 atm, while temperature is kept constant.
The final temperature is 150 K, while pressure remains constant.
The final pressure is 1.5 atm, while temperature is kept constant.
m
The final temperature is 100 K, while pressure remains constant.
Answers
Answer:
A the pressure is changed to 0.8
Explanation:
Boyles gas law
The factor that the chemist changed is so that the new volume is 5.0 L is the final pressure is 0.8 atm, while temperature is kept constant.
What is Boyle's law?Robert Boyle studied the relationship between pressure p and volume V of a fixed amount of gas held at a constant temperature in the mid 1600s.
Boyle discovered that the product of pressure and volume remains nearly constant. For an ideal gas, the product of pressure and volume is a constant.
Thus, the correct option is A, The final pressure is 0.8 atm, while temperature is kept constant.
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lewis dot diagram for mercury
Answers
The Hg atom's electronic configuration in the Lewis structure of HgCl2 is [Xe], 4f14, 5d10, and 6s2. As a result, the outer shell valence orbital of the Hg (mercury) atom has two valence electrons.
Explain about the electrons?
The electron is the smallest atom-forming particle and a carrier of a negative charge. For instance, the hydrogen atom only contains one proton and one electron. The uranium atom is unique due to its 92 protons and 92 electrons.
The electrons of the negatively charged atom are in charge of this. The positive charge of the protons in the atomic nucleus is balanced by the overall negative charge of an atom, which is created by all of its electrons. The electron is a very little element compared to all the other parts of the atom.
An electron may be attached to or free from an atom. A negatively charged subatomic particle is called an electron (not bound).
The complete question is,
What does mercury's Lewis dot structure look like?
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A container has 1.50 moles of hydrofluoric acid molecules, a deadly acid that
can kill someone in minutes. How many molecules is this?
Answers
A container has 1.50 moles of hydrofluoric acid molecules, a deadly acid that can kill someone in minutes molecules are 9.03 × 10 ²³ molecules.
What are moles?Moles are the smallest unit of a molecule that participates in the formation of the molecules to compete in a reaction and the value will be equal to the Avogadro number 2.303 × 10 ²³.
To calculate the total number of molecules the value of one mole is 2.303 × 10 ²³. so, for 1.50 moles of hydrofluoric acid will be,
1.50 moles = 2.303 × 10 ²³.moles
hydrofluoric acid molecules = 1.50 × 2.303 × 10 ²³
hydrofluoric acid molecules = 9.03 × 10 ²³ molecules.
Therefore, 9.03 × 10 ²³ molecules are present in the container has 1.50 moles of hydrofluoric acid molecules, a deadly acid that can kill someone.
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how many moles of aluminum are necessary to generate 4.88 moles of aluminum oxide, according to the following equation:
4Al+3O2→2Al2O3
Answers
9.76 mol moles of aluminum are necessary to generate 4.88 moles of aluminum oxide.
4.88 moles Al2O3 (4 moles Al / 2 moles Al2O3) = 9.76 moles Al
1 mol = 6.02214 ×\(10^{23}\) particles
The mole is the amount of stuff in a system that includes the same number of atoms as there are in 0.012 kilogrammes of carbon 12; it is represented by the symbol "mol".
The Avogadro constant's numerical value is fixed to be precisely 6.022 141 29 1023 when it is expressed in the SI unit mol-1. The mole, symbol mol, is the SI unit of substance for an elementary entity that is specified, which may be an atom, molecule, ion, electron, any other particle, or a specified group of such particle.
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True or False:
A compound contains 38.7% C, 9.70% H, and 51.6% O. Thus
the empirical formula for the compound is CH2O.
Answers
yes sure, true it can beee
Answer:
False
Explanation:
What is the volume of the rock?
Answers
Answer:
8 mL
Explanation:
You read volume on a graduated cylinder by counting the number under the line on top of the liquid (minuscus).
Before the rock was added, the volume is 10 mL. After the rock was added, the volume is 18 mL. Subtract the two volumes to find the volume of the rock.
18 mL - 10 mL = 8 mL
Technician A states that if moisture enters the A/C system, acid is created. Technician B states that evacuating an A/C system boils away moisture, which is removed from the system as a gas. Who is correct
Answers
Technician A's statement is partially correct. When moisture enters an A/C system, it can react with the refrigerant and lubricant oils to form acidic compounds, which can damage the A/C system components. However, it is not the moisture itself that creates the acid but rather the chemical reactions that occur when it mixes with the refrigerant and oils.
Technician B's statement is also correct. Evacuating an A/C system removes moisture by boiling it away. When the pressure in the system is reduced, any moisture present will boil and be removed from the system as a gas. This is an important step in the A/C system service process to ensure that the system operates properly and efficiently.
In conclusion, both technicians are partially correct. Moisture entering the A/C system can lead to the formation of acidic compounds, which can damage the system. Evacuating the system is an effective way to remove moisture and ensure proper operation of the A/C system.
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7. A sample of 7.0 mL of concentrated sulfuric acid, H₂SO4 is used to make 250. mL of a 0.50 M sulfuric acid solution. What was the initial concentration of the sulfuric acid?
Answers
17.86 M
Hello to find this out we use the MV=MV equation
Convert units 7.0 / 1000
Plug in and multiply
0.007*M = 0.50*0.25
Divide by 0.007 M
17.86 M
What type of conservation tillage leaves the greatest amount of soil cover by crop residues? What are the advantages and disadvantages of this system?
Answers
Answer:
No-till conservation tillage
Explanation:
No till conservation involves the soil not being touched which gives rise to a large amount of organic matter being left on the surface.
The Advantage of this method is that it helps to prevent erosion such as that of wind and water due to the little or no exposure of the soil surface and helps to provide nutrients to the plants through the organic matter present.
The Disadvantage of this method is its heavy reliance of chemicals such as herbicides in killing the weeds in order to prevent competition for vital compounds with the main plants.
If it is found that the energy of one photon is 4.85 X 10^-19J and there is a malfunction of equipment, could you find:a) frequency, wavelenght, and color of this light.b) If the human eye must receive total energy of 7.20 x 10^-16 J ofenergy in order to be able to detect light, how many photons ofthis particular light must fall on the retina?c) Would it require more or less photons of wavelenght 720 nm inorder to be able to see it?Useful information you may need:Red 700- 650 nmOrange 649 - 580 nmYellow 579- 575 nmGreen 574- 490 nmBlue 489- 455 nmIndigo 454- 425 nmViolet 424- 400 nm
Answers
a) To find the frequency (f), wavelength (λ), and color of the given light with an energy of 4.85 x 10^-19 J, we can use the relationship between energy, frequency, and wavelength of a photon.
The energy of a photon (E) can be expressed as:
E = hf
where h is the Planck's constant (approximately 6.626 x 10^-34 J*s) and f is the frequency of the photon.
Rearranging the equation, we can solve for frequency:
f = E / h
Substituting the given energy value:
f = (4.85 x 10^-19 J) / (6.626 x 10^-34 J*s)
f ≈ 7.33 x 10^14 Hz
To find the wavelength (λ), we can use the equation:
c = λf
where c is the speed of light (approximately 3.00 x 10^8 m/s).
Rearranging the equation, we can solve for wavelength:
λ = c / f
Substituting the calculated frequency:
λ = (3.00 x 10^8 m/s) / (7.33 x 10^14 Hz)
λ ≈ 4.09 x 10^-7 m (409 nm)
Based on the wavelength, the color of this light falls within the violet range of the visible spectrum.
b) If the human eye must receive a total energy of 7.20 x 10^-16 J to detect light, we can calculate the number of photons required using the energy of one photon.
Number of photons = Total energy / Energy of one photon
Number of photons = (7.20 x 10^-16 J) / (4.85 x 10^-19 J)
Number of photons ≈ 1485 photons
Therefore, approximately 1485 photons of this particular light must fall on the retina for the human eye to detect it.
c) To determine whether it would require more or less photons of wavelength 720 nm (red light) to be able to see it, we can compare the energy of one photon for this wavelength with the given energy of 4.85 x 10^-19 J.
If the energy of one photon of red light is higher than 4.85 x 10^-19 J, it would require fewer photons to reach the total energy needed for detection. Conversely, if the energy of one photon of red light is lower than 4.85 x 10^-19 J, it would require more photons.
To find the energy of one photon for red light with a wavelength of 720 nm, we can use the equation:
E = hf
where h is the Planck's constant and f is the frequency of the photon. Since we have the wavelength (720 nm), we can find the frequency using the equation:
c = λf
where c is the speed of light.
Rearranging the equation, we can solve for frequency:
f = c / λ
Substituting the values:
f = (3.00 x 10^8 m/s) / (720 x 10^-9 m)
f ≈ 4.17 x 10^14 Hz
Now we can calculate the energy of one photon:
E = hf
E = (6.626 x 10^-34 J*s) * (4.17 x 10^14 Hz)
E ≈ 2.76 x 10^-19 J
Comparing this energy with the given energy, we see that the energy of one photon of red light (2.76 x 10^-19 J) is higher than 4.85 x 10^-19 J
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Propane burns in air to form gaseous carbon dioxide and water vapor by
the equation below. If I burn 5.5 liters of propane, how many liters of water
vapor will I produce at STP?
C3H8c6 + 502(g) → 3CO2(g) + 4H2O(g)
Answers
Answer:
22 L OF WATER VAPOR WILL BE PRODUCED AT STP IF 5.5 L OF PROPANE WERE BURNED.
Explanation:
Balanced Equation for the reaction:
C3H8(g) + 5O2(g) -------> 3CO2(g) + 4H2O(g)
From the reaction;
1 mole of propane gas reacts with 5 moles of oxygen gas to form 4 moles of water vapor.
At STP, 1 mole of a gas occupies 22.4 dm^3 of the gas
So therefore, 22.4 dm^3 of propane reacts with oxygen to produce 4 * 22.4 dm^3 of water vapor.
22.4 dm^3 of propane = 89.6 dm^3 of water vapor
If 5.5 L of propane were to be burned, how many litres of water would be produced?
22.4 L of propane produces 89.6 L of water
5.5 L of propane will produce ( 5.5 L * 89.6 L/ 22.4 L) L of water vapor
5.5 L of propane will produce 492.8 / 22.4 L of water vapor
5.5 L of propane will produce 22 L of water vapor.
So at the end of the reaction of 5.5 L of propane, 22 L of water vapor will be given off.
How many different sublevels are in the first energy level.
Answers
Answer:
There is only one sub level in the first principal energy level, and it is 1s
Explanation:
trust
Which of the following accounts for most of the cell cycle?
Answers
The cycle that accounts for most of the cell cycle is the interphase cycle.
What is the interphase cell cycle?The cell is the simplest unit of the organism that can be able to sustain itself. There are several cycles that do go on in the cell.
The interphase cell cycle is the period of a cell's life during which it is actively growing and replicating its DNA. It is divided into three main stages: G1, S, and G2.
In G1, the cell grows and carries out normal functions. In S phase, DNA replication occurs. In G2, the cell checks for errors in replication and prepares for cell division.
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Does Jarren love Maria more or does Maria love Jarren more?
(Not for school)
Answers
Answer:
Maria
Explanation:
Answer:
Maria loves Jarren more is the answer.
Helped by QueenTlove Have an nice day
Write an equation that shows the formation of a strontium ion from a neutral strontium atom
Answers
Answer:
See explanation
Explanation:
Sr(s) + 2HCl(aq) -----> SrCl2(aq) + H2(g)
Ionically;
Sr(s) + 2Cl^-(aq) ----> SrCl2(aq)
If we look at the reaction above, strontium atom was dissolved in hydrochloric acid. The strontium atom is now oxidized by the acid to give Sr^2+ ion according to the equation shown above.
Are the following chemical equations balanced or
Balanced / Onbalanced
.
CH4 + 4Cl2 → CCL + 2HCL
Balanced / Unbalanced
N2 + 3H2
2NH3
Balanced / Unbalanced
C3H2 + 302 + 3CO2 + 4H2O
+
Answers
Answer:
the first is unbalanced
because the number of hydrogen are not equal on both sides
the second one is balanced
because the number of nitrogen and hydrogen atoms are equal on both sides
and the third one seems to be incomplete
What is the purpose of adding base in the aldol condensation reaction? Choose the best answer. a Protonate a-carbon to generate electrophile b To generate intermediate enol c Deprotonate a-carbon to generate electrophile d Protonate a-carbon to generate nucleophile e Deprotonate a-carbon to generate nucleophile f To neutralize acid
Answers
The purpose of adding base in the aldol condensation reaction is c) Deprotonate α-carbon to generate electrophile.
What is aldol condensation?
Aldol condensation is a reaction in organic chemistry that involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form a β-hydroxy carbonyl compound.
In the aldol condensation reaction, a base is added to deprotonate the α-carbon of the carbonyl compound, typically an aldehyde or a ketone. The deprotonation of the α-carbon generates an enolate ion, which is an excellent nucleophile. This deprotonation step is crucial in generating the reactive electrophile necessary for the aldol condensation reaction.
By deprotonating the α-carbon, the base increases the electron density on the carbon atom, making it more nucleophilic and prone to react with another carbonyl compound. This enables the formation of a new carbon-carbon bond, resulting in the formation of an aldol product.
Therefore, the purpose of adding a base in the aldol condensation reaction is to deprotonate the α-carbon and generate an electrophilic enolate ion, which can then react with another carbonyl compound to form the desired product.
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Which characteristic describes the traposphere
Answers
Answer:
It is the wettest layer of the atmosphere.It extends upto 10km upward from sea level.
is CO(NH2)2 and (NH2)2CO the same thing
Answers
Answer:
Explanation: the answer is YES
CO(NH2)2 and (NH2)2 CO is the urea
suppose you needed to calculate the mass, in grams, of sodium in 1.5 grams of sodium chloride? which of the following equations allows you to correctly calculate the mass of sodium in 1.5 grams of sodium chloride.A. Mol NaCI / 58.44 g NaCI X mol Na / NaCI X 22.99 g Na / mol Na = B. 1.5 NaCI X mol NaCI / 58.44 g NaCI X 22.99 g Na / mol Na = C. 1.5 g NaCI X mol NaCI / 58.44 g NaCI X mol Na / mol NaCI X 22.99 g Na / mol Na = D. 1.5 g NaCI X mol NaCI / g NaCI X mol Na / mol NaCI X g Na / mol Na =
Answers
The correct equation to calculate the mass, in grams, of sodium in 1.5 grams of sodium chloride is: C. 1.5 g NaCI X mol NaCI / 58.44 g NaCI X mol Na / mol NaCI X 22.99 g Na / mol Na.
To break it down, this equation is:
1.5 g (grams) of Sodium Chloride (NaCI) multiplied by the molar mass of Sodium Chloride (mol NaCI) divided by 58.44 g (grams) of Sodium Chloride multiplied by the moles of Sodium (mol Na) divided by the moles of Sodium Chloride (mol NaCI) multiplied by the molar mass of Sodium (22.99 g Na) divided by the moles of Sodium (mol Na).
In other words, the equation is:
Mass in gm (Na) = 1.5 g (NaCI) × (mol NaCI/58.44 g (NaCI)) × (mol Na/mol NaCI) × (22.99 g (Na)/mol Na).
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what does it mean when we say chemistry is the structures , composition, transformation and property of chemicals????pleazzz i wanna the right answer?
Answers
Explanation:
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
What will happen to the gas molecules in the container as thermal energy is applied?.
Answers
When a thermal energy is applied to a container of gas the volume of the gas will increase
Heating a gas makes its atoms and molecules move faster and that way increases the kinetic energy of the particles causing the gas expansion and the increase of its volume and pressure.
Otherwise when the thermal energy is removed, the atoms or molecules start to move slower and become denser until the substance condenses.
Common examples of kinetic energy due to thermal energy are: rubbing the hands, baking in an oven, boiling water, when the seat of the car are heated.
What is kinetic energy?It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
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