Answers
Answer:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶
Explanation:
Iron is soft, bright white metal.
Its symbol is Fe, atomic number is 26 and atomic mass is 55.85 amu.
It is present in group 8 of periodic table.
It is used to make the steel.
It is malleable and ductile used to make the sheets.
It is good conductor of heat and electricity because of moveable electrons that can easily move from one to another atom.
Its density is 7.87 g/cm³.
Electronic configuration:
Fe₂₃ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶
Abbreviated electronic configuration:
Fe₂₃ = [Ar] 3d⁶4s²
Related Questions
What are the top three sources of US electricity generation?
Answers
The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources.
what type of hybrid orbitals do you expect for the metal ion in the coordination compound na[agcl2]?
Answers
The silver ion in Na[AgCl₂] is expected to have unhybridized s orbitals and p orbitals involved in coordination bonding.
Explain the geometry of the coordination compound Na[AgCl₂]?In the coordination compound Na[AgCl₂], the silver ion (Ag⁺) has a d10 electronic configuration, which means that it does not require any hybridization to form complex compounds. Therefore, the silver ion in Na[AgCl₂] is expected to have unhybridized s orbitals and p orbitals involved in coordination bonding.
The chlorine atoms in the compound each contribute one electron to form a coordinate covalent bond with the silver ion, resulting in a linear molecular geometry with a bond angle of 180 degrees. Overall, the coordination complex has a tetrahedral geometry with a coordination number of two.
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Which of the following would
MOST LIKELY be a habitat for
moss?
A a forest
B. a desert
C. a tundra
D. a grassland
Answers
Answer: A forest
Explanation:
Moss are more likely to be found in moist shady locations. They are best known for those species that carpet woodland and forest floors.
What is the main benefit of this model?
A. It helps make predictions about the number of sides in a triangle,
B. It helps visualize the features of a triangle.
ООО. I will mark brainliest
C. It shows the shape and parts of a triangle.
D. It shows a pattern for determining the side lengths of a triangle,
Answers
Answer:
letter D.
Explanation:
it shows a pattern for determining the side of lengths of a triangle yeah the triangle had a model and a length
Dr. Michelle Wang at Cornell University studies DNA replication and protein synthesis. Her group researches how a protein called helicase unzips the DNA strand.
After DNA is unzipped, what is the next step in DNA replication?
A. Messenger RNA forms along the exposed DNA bases.
B. A chromosome with two identical strands of DNA is formed.
C. Nitrogen bases pair up with the DNA strands.
D. Ribosomes attach to DNA and move along the strand.
Answers
Answer:
C. Nitrogen bases pair up with the DNA strands.
Explanation:
The correct option would be that nitrogen bases pair up with DNA strands.
DNA replication is a process during which a DNA molecule makes a copy of itself. It represents one of the major processes of gene expression.
DNA replication happens in several steps and it involves several important enzymes: The steps can be summarized in chronological order as follows:
The double helix structure of the DNA is first unwound using a helicase enzyme.A short RNA sequence known as primer binds to each DNA strand. Binding is done at a single site on the leading strand while it is done at multiple sites on the lagging strand.An enzyme known as DNA polymerase then elongates the primers by adding nucleotide bases to grow new strands.Once elongation is complete, the primer disengage and the RNA nucleotide bases are replaced DNA equivalence, the okazaki fragments of the lagging strands is joined by a ligase, the nely synthesized strands are proofread and each strand winds up to their respective parent strand.Hence, the correct option would be that nitrogen bases pair up with the DNA strand.
Correct option: C.
What did sulfuric acid reacts with most bases to give the corresponding?
Answers
Being an acid, Sulfuric acid reacts with most bases to give its corresponding sulphate.
Sulfuric acid is a type of acid which is colorless oily liquid. Sulfuric acid is highly soluble in water and while dissolving it releases big amount of heat. Sulfuric acid is very acidic in nature that it will burn wood and most other organic matter on contact, but is unlikely to cause a fire. Density of this acid is 15 lb / gal.
Sulfuric acid is highly acidic in nature and due to this it is used in the cleaning of metals, removal of impurities from oil, manufacturing of chemicals.
Being an acid, sulfuric acid reacts with most of the bases to give its corresponding sulphate.
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Explain the method of preparation of alkyl halides using phosphorus halide
Answers
Answer:
The phosphorus first reacts with the bromine or iodine to give the phosphorus(III) halide. These then react with the alcohol to give the corresponding halogenoalkane, which can be distilled off
hope this helps bby<3
A. How many molecules of sugar are in 20.5 g of sugar?
Answers
Answer:
By definition, one mole (one gram molecular weight) of any substance, contains Avogadro’s number of particles; atoms if you are discussing an element, or molecules if a compound. Avogadro’s number has been determined by several methods, all of the accepted values lie within a range of +-1% about the value of 6.022045 x 10^23/gm. That is a large number, in this case approximately; 602,204,500,000,000,000,000,000 molecules of glucose.
An instructor has a jar of sulfur that contains 16 grams. The students are asked how many sulfur atoms are in the jar. Four students give the following responses:
Arlo says, "There are 1/2 times Avogadro's number of sulfur atoms in the jar."
Bob says, "There are sixteen sulfur atoms in the jar."
Celine says, "There are two times Avogadro's number of atoms in the jar."
Delbert says, "There are sixteen times Avogardro's number of atoms in the jar."
With which, if any, of these three students do you agree:
Arlo,
Bob,
Celine,
Delbert, or
I don't think any of these students are correct
Answers
The student with the correct statement is Arlo.
How to determine the number of atomsFirst, we shall determine the mole of sulphur in the jar. This can be obtained as follow:
Mass of sulphur = 16 gramsMolar mass of sulphur = 32 g/moleMole of sulphur =?Mole = mass / molar
Mole of sulphur = 16 / 32
Mole of sulphur = 1/2 mole
Finally, we shall determine the number of atoms in the jar. This can be obotained as follow:
From Avogadro's hypothesis,
1 mole of sulphur = 6.02×10²³ atoms
Therefore,
1/2 mole of sulphur = 1/2 × 6.02×10²³ atoms
1/2 mole of sulphur = 1/2 × Avogadro's number
Thus, the number of sulphur atom is 1/2 times Avogadro's number
Therefore, Arlo is correct.
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When a metal is put into an acidic solution, what happens? A. the metal turns red B. hydrogen gas is produced C. nothing happens D. the surface becomes slippery
Answers
Answer:
B
Explanation:
It will produce hydrogen gas and salt.
What is difference between simple distillation & fractional distillation
Answers
Answer: simple distillation is used to separate substances in mixtures with widely disparate boiling points, whereas fractional distillation is used for mixtures containing chemicals with similar boiling points.
Explanation:
How do you do this isotope worksheet? I don’t understand.
Answers
The isotope work sheet can be filled from the atomic numbers and the mass numbers of the isotopes.
How do you fill an isotope work sheet?An isotope worksheet is used to track and organize information about different isotopes of a given element. To fill an isotope worksheet, the following information should typically be included:
Element symbol: The symbol of the element being studied.
Atomic number: The number of protons in the nucleus of the atom.
Mass number: The total number of protons and neutrons in the nucleus of the atom.
Isotope: A unique identifier for each isotope, typically written as element symbol, mass number.
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During the initial pressure test, the source shutoff valve shall remain closed and the test pressure for pressure gases shall be 1.5 times the system working pressure, but not less than _____________.
Answers
During the initial pressure test, the source shutoff valve should remain closed and the test pressure for pressure gases should be 1.5 times the system working pressure, but not less than the minimum specified value.
During the initial pressure test, the source shutoff valve shall remain closed and the test pressure for pressure gases shall be 1.5 times the system working pressure, but not less than the minimum allowable pressure specified by the manufacturer or applicable code requirements.
It is important to follow the specified pressure requirements during testing to ensure the safety and integrity of the system. Any deviations from the specified requirements could lead to dangerous situations, including leaks or ruptures in the system.
Therefore, it is crucial to carefully follow the testing procedures and guidelines provided by the manufacturer or applicable codes.
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Answer:
The test pressure should be 1.5 times the working pressure or the MAWP, whichever is higher.
Explanation:
The MAWP is the maximum pressure at which the system is designed to operate safely.
The minimum pressure required during the initial pressure test for pressure gases can vary depending on the applicable regulations, codes, or standards.
However, a common requirement is that the test pressure shall be 1.5 times the system working pressure, but not less than the maximum allowable working pressure (MAWP) of the system.
Therefore, the test pressure should be 1.5 times the working pressure or the MAWP, whichever is higher.
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what is the temperature of gas and volume of gas
Answers
Explanation:
500 degree Celsius because we can see it in the tube
what is the volume in liters of 3.75 moles of o2 gas
Answers
The volume of 3.75 moles of oxygen gas at STP is 84.05L.
How to calculate volume?The volume of a gas can be calculated using the ideal gas law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureAt standard temperature and pressure (STP), the temperature and pressure of an ideal gas is 273K and 1 atm respectively.
1 × V = 3.75 × 0.0821 × 273
V = 84.05L
Therefore, 84.05L is the volume of the ideal oxygen gas.
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Can someone help please
Answers
Answer:
fuse
Explanation:
fuses are made by metal alloys , have low melting point
a gas with an initial volume of 2.000 l at 275.0 k is heated. the final volume is 5.800 l. calculate the final temperature of the gas, in k.
Answers
The final temperature of the gas is approximately 0.04218 k. To calculate the final temperature of the gas, we can use the formula:
(V1/T1) = (V2/T2)
where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature. We can rearrange this formula to solve for T2:
T2 = (V2/T1) * V1
Plugging in the given values, we get:
T2 = (5.800/275.0) * 2.000
T2 = 0.02109 * 2.000
T2 = 0.04218 k
Therefore, the final temperature of the gas is approximately 0.04218 k.
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Two students are working together to build two models. Both models will represent the molecular structure of sodium bicarbonate, NaHCO3 commonly known as baking soda. The students are using toothpicks to represent bonds and jelly beans to represent atoms. Red jellybeans represent sodium atoms, white jellybeans represent hydrogen atoms, black jellybeans represent carbon atoms, and blue jelly beans represent sodium atoms, white jellybeans represent hydrogen atoms, like jellybeans our cruise and carbon atoms, and we jellybeans that is an oxygen atoms.
Identify the number of each jelly bean needed to make both models.
Answers
Answer:
Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.
Note: Since no specific color was stated for oxygen atoms, the answer assigns blue colored jellybeans to represent oxygen atoms.J
Explanation:
Sodium bicarbonate, NaHCO₃ is a compound composed of one atom of sodium, one atom of hydrogen, one atom of carbon and three atoms of oxygen.
Since red jellybeans represent sodium atoms, white jellybeans represent hydrogen atoms, black jellybeans represent carbon atoms and blue jellybeans represent oxygen atoms, each of the two students will require the following number of each jellybean for their model of sodium carbonate: One red jellybean, one white jellybean, one black jellybean and three blue jellybeans.
Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.
If the reaction quotient, Q, is equal to the equilibrium constant, Keq, the reaction wil Multiple Choice continue the reverse reaction to convert products into reactants. continue the forward reaction to convert reactants into products. halt all reactions. continue both forward and reverse reactions to keep the ratio of reactants and products the same.
Answers
The reaction quotient, Q, is a measure of the relative amounts of products and reactants at any given point in a chemical reaction. It is calculated by taking the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.
On the other hand, the equilibrium constant, Keq, is the ratio of the concentrations of products to reactants at equilibrium, with each concentration raised to its respective stoichiometric coefficient.
If Q is equal to Keq, it means that the reaction has reached equilibrium. At this point, the ratio of the concentrations of products to reactants is constant, and the reaction will not proceed in either direction to favor one set of species over the other. Therefore, the correct answer to the multiple-choice question is that the reaction will halt all reactions. This means that there will be no net change in the concentrations of the products and reactants, and the reaction will remain in a state of dynamic equilibrium.
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How would antibodies against NT receptors affect the neuromuscular junction?
Answers
Antibodies against nicotinic acetylcholine receptors (nAChR), present at neuromuscular junction (NMJ), can affect function of junction by interfering with normal signaling between nerve and muscle.
How would the antibodies against NT receptors affect neuromuscular junction?Antibodies against nicotinic acetylcholine receptors (nAChR), which are present at neuromuscular junction (NMJ), can affect the function of junction by interfering with normal signaling between nerve and muscle.
At NMJ, the nerve terminal releases acetylcholine (ACh), which binds to nAChR on muscle cell membrane, leading to depolarization of muscle cell and muscle contraction. If antibodies bind to nAChR, they can block or reduce the number of available receptors for ACh, leading to decrease or even complete loss of the normal muscle response to nerve stimulation.
This can result in muscle weakness, fatigue, and even paralysis, depending on the severity of antibody binding and amount of functional nAChR remaining at the NMJ.
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Which diagram shows the correct direction of electron flow in an electrolytic cell?
attachments in order A B C D
Answers
In electrolysis the flow of electrons occurs from Anode (Positively Charged electrode) towards Cathode (Negatively charged electrode).
Therefore Diagram A shows the correct flow of electron in an electrolysis
What is electrolysis ?
Chemical decomposition produced by passing an electric current through a Electrolytic (Salt) solution containing ions.
Anode is located at the left hand side of the electrolytic cell where as cathode is located at the right hand side of the electrolytic cell.
Therefore, In the given diagrams, Diagram A follows the above mentioned pattern.
Hence, It shows the correct direction of electron flow in an electrolytic cell.
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please help me need it fast
Answers
Answer:
Do you need 3 ways or just one?
1. Temperature.
2. Pressure.
3. Polarity.
Explanation:
Eh hope these help, Idr understand the question but those are 3 ways to increase the solubility of a solid in water.
Can someone write an essay for me requiring
sustainability problems in Canada
Answers
Climate change, Natural resource use, Waste production, Water pollution, Ocean acidification and Air pollution are the sustainability problems in Canada as well all over the world.
What are the sustainability problems in Canada?Climate change is the major change that occur in Canada because of the extensive use of fossil fuels and the release of other pollutants. This climate change leads to change the precipitation pattern in Canada. The extensive use of natural resource and production of waste material are also serious problems in Canada. Due to waste production, water is polluted because the waste is disposed in the water bodies which leads to acidification of ocean and serious threats to aquatic animals and plants.
So we can conclude that Climate Change, Natural Resource Use, Waste Production, Water Pollution, Ocean Acidification and Air Pollution are the sustainability problems in Canada as well all over the world.
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What is the biggest grass in the world
Answers
Answer:
bamboo is the biggest/tallest grass in the world
Answer:
Giant Bamboo
Explanation:
Giant bamboo, which can grow up to 151 feet tall, is the largest variety of grass.
If the reaction has reached equilibrium and then the sealed reaction vessel expands, increasing the volume, the reaction would ____.
Answers
If the reaction has reached equilibrium and then the sealed reaction vessel expands, increasing the volume, the reaction would increase.
The equilibrium will change to favor the direction that produces more moles of gas when the volume is increased.
Equilibrium is a state of balance between opposing forces or actions that can be static (such as when forces are applied to a body and the resultant is zero) or dynamic (such as during a reversible chemical reaction when the velocities in both directions are equal). It can also be a state of equilibrium between the mind and the body.
In terms of economics, equilibrium occurs when supply and demand are equal. When you are composed and steady, you are in an equilibrium state.
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A mixture of H2 and water vapor is present in a closed vessel at 20°C. The total pressure of the system is 755. 0 mmHg. Partial pressure of water vapor at 20°C equals 17. 5 mmHg. What is the partial pressure of H2? mmHg.
Answers
The partial pressure of hydrogen in the mixture has been 737.5 mm Hg.
The partial pressure has been defined as the pressure exerted by the individual gas in the mixture.
According to the Dalton's law of partial pressure, the total pressure of the gas, has been the sum of the partial pressure of constituents gas.
Computation for the partial pressure of HydrogenThe given mixture has been the combination of hydrogen and water vapor. According to the Dalton's law, the total pressure, P of the system has been:
\(P=P_H_2\;+\;P_{H_2O}\)
The total pressure of the gas has been, \(P=755\;\rm mm\;Hg\)
The partial pressure of water vapor, \(P_{H_2O}=17.5\;\rm mm\;Hg\)
Substituting the values for the partial pressure of hydrogen,\(P_{H_2}\)
\(755=P_{H_2}\;+\;17.5\;\text{mm Hg}\\P_{H_2}=755-17.5\;\text{mm Hg}\\P_{H_2}=737.5\;\rm mm\;Hg\)
The partial pressure of hydrogen in the mixture has been 737.5 mm Hg.
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jowl is a derived unit give reason
Answers
Answer:
Explanation:
Joule is the unit of energy and work done.
It is a derived quantity because it is not a fundamental or basic unit.
A derived unit is formed by the combination of two or more fundamental quantities.
Since work done = Force x distance
Force = mass x acceleration
= mass x acceleration x distance
The unit then becomes kgm²/s²
So, 1joule = 1kgm²/s²
The method of converting from an
amount of one substance to an
amount of another substance using a
balanced chemical equation.
Answers
Explanation:
one substance
+one substance=balanced of chemical equation
Place the following compounds in order of increasing strength of intermolecular forces
C*H_{4}
C*H_{3}*C*H_{2}*C*H_{3}
C*H_{3}*C*H_{3}
A) C*H_{3}*C*H_{3} < C*H_{4} < C*H_{3}*C*H_{2}*C*H_{3}
B) C*H_{3}*C*H_{2}*C*H_{3} < C*H_{4} < C*H_{3}*C*H_{3}
C) C*H_{4} < C*H_{3}*C*H_{2}*C*H_{3} < C*H_{3}*C*H_{3}
D) C*H_{4} < C*H_{3}*C*H_{3} < C*H_{3}*C*H_{2}*C*H_{3}
B is the correct order
C is the correct order
A is the correct order
D is the correct order
Answers
The correct order of increasing strength of intermolecular forces is C*H_{4} < C*H_{3}*C*H_{3} < C*H_{3}*C*H_{2}*C*H_{3}. Hence, the option (d) is correct.
The strength of intermolecular forces depends on the type of molecules present. There are three types of intermolecular forces that are generally present in molecular substances: van der Waals forces, dipole-dipole forces, and hydrogen bonding. These forces increase in strength as the polarity of the molecule increases. Vanderwaal's forces are considered the weakest intermolecular force between molecules. Van der Waals forces are also called dispersion forces, London forces, or instantaneous dipole forces. These forces arise when there is a temporary formation of dipoles between atoms. These are more pronounced in larger molecules as there is more space for temporary dipoles to occur, which implies that CH4 has the weakest Vanderwaal's forces due to the presence of multiple carbon atoms and the presence of hydrogen atoms in between them. CH3CH3 has a higher intermolecular force than CH4.
Therefore, CH3CH3 has higher intermolecular forces than CH4 and CH3CH2CH3 has the highest intermolecular force out of the three.
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What is the molar mass of sulfur dihydride?
Answers
Explanation
To find the molar mass of sulfur dihydride, you will need to find the sum of all the atomic masses making up sulfur dihydride.
sulfur dihydride is H2S.
Atomic mass of H = 1,00784 u
Atomic mass of S = 32,065 u
Molar mass = (1.00784 x 2) + 32,065 = 34.081 g/mol
Answer
34.081 g/mol