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
1. Explain redshift?
2. What is the Big Bang Theory? Explain why redshift is evidence for this theory.
Answers
2) The theory states that about 13.7 billion years ago all the matter in the Universe was concentrated into a single incredibly tiny point. This began to enlarge rapidly in a hot explosion, and it is still expanding today.
As objects move away from an observer the wavelengths are stretched, creating longer wavelengths. The longest wavelengths of visible light are the red wavelengths. As objects move toward an observer the wavelengths are shorten.It is this observation of the red shift that gave rise to the theory of the Big Bang.
which has less electron affinity? francium, strontium, silicon, or fluorine
Answers
In the ground state, which atom has a completely filled valence electron shell?
Answers
Answer:
The noble gases(neon, helium, argon)
Explanation:
In the ground state, noble gas atom has a completely filled valence electron shell. Space makes up the majority of an atom.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.
Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense. In the ground state, noble gas atom has a completely filled valence electron shell.
Therefore, in the ground state, noble gas atom has a completely filled valence electron shell.
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Can someone help me please?
Answers
Answer:
I did this already
................
A substance that forms hydroxide ions in a water solution is a base.
A. True
B. False
Answers
Answer:
True
Explanation:
describe a chemical test for water. Give the test and the result
Answers
Answer:
Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it.
When water is present in a sample of copper(II) sulfate it turns blue. It is still a dry solid, because the individual water molecules are trapped within the ionic lattice surrounding the copper(II) ions. Solutions of copper(II) sulfate are also blue.
This colour change can be used to detect the presence of water (or water vapour).
The type of response when a plant moves away from the stimulus
Answers
Answer:
A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin.
Explanation:
What type of battery is your flashlight battery?
voltaic piles
dry cell batteries
lead-acid batteries
wet cell batteries
Answers
A "cell" might be a better name for the torch battery. A "battery" is a collection of connected cells. Another example of an electric cell is a lemon with two strips of different metals (for instance, zinc & copper) inserted into it. The correct option is B.
A primary cell in a dry-cell battery is one that cannot be recycled. Each dry-cell battery has a cathode and an anode for operation. Remote controls, clocks, and calculators are a few examples of modern-day items that employ dry-cell batteries.
Alkaline and lithium batteries are the two most typical types found in flashlights. A "dry" cell used in a torch has a finite lifespan.
Thus the correct option is B.
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According to the collision theory, which is required for a high number of effective collisions?
a very low amount of force from colliding molecules
a very low amount of kinetic energy from colliding molecules
molecular collisions that have very specific orientations
molecular collisions with energy to overcome activation energy
Answers
Answer:
molecular collisions that have very specific orientations
Explanation:
Based on the collision theory, a high frequency of effective collision is dependent on the molecular collisions that have very specific orientations.
The collision theory suggests that for reactions to occur, there must collision between reacting particles. The number of collision is dependent on the number of collision per unit time as well as fractions of effective collision. To attain effective collision, colliding particles must be properly oriented to give the desired product.Answer:
C. molecular collisions that have very specific orientations
Explanation:
PLEASE ANSWER I WILL GIVE BRAINLIEST
What are the two main ways that waves can cause weathering and erosion?
A.
force and deposition
B.
cracking and smacking
C.
impact and abrasion
D.
abrasion and plucking
Answers
Answer:
its A
Explanation:
if compose means to put together then decompose means to what?
Answers
Answer:
Break apart
Explanation:
Decompose: to break down or cause to break down into component elements or simpler constituents.
Can someone please help me out?
Answers
Answer:
c
Explanation:
Which of the following would be a clue that rock is igneous?
A.It has crystals.
B.It has a complete fossil in it.
C.It has bands.
D.It is very soft.
Answers
Answer:
A is the answer to your question
They usually have crystals since they are formed from lava
GIVING BRAINLEST TO WHOEVER HAS THE RIGHT ANSWER! Plz and thx
Food and fossil fuels are considered to be sources of________ energy
1. Mechanical
2.Light
3.Nuclear
4. Chemical
Answers
Answer:
Nuclear energy
I'm not sure ok.. Better ask some adult for making sure.
What if you mix green with blue?
Answers
Answer:
Ooo points, You get teal, turquoise, and cyan :)
Please help me out with these questions please..
Both are in 1 picture:)
Answers
Answer:
1. B
2. C
Explanation: The law that the properties of the elements are periodic functions of their atomic numbers. And the second one is, most of the air we breathe is made of oxygen.
In a titration of a solution of unknown concentration of calcium hydroxide against hydrochloric acid (concentration 0.9mol/dm3), 25cm3 of calcium hydroxide was neutralised by 22.5cm3 of hydrochloric acid. Calculate the concentration of the calcium hydroxide solution.
Ca(OH)2 + 2HCl -> CaCl2 + 2H2O
Answers
I hope that will be helpful
if the percentage yield of a reaction is 85%
Answers
Answer: % yield
=
actual yield
theoretical yield
⋅
100
%
So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (
C
6
H
12
O
6
) is burned with enough oxygen.
C
6
H
12
O
6
+
6
O
2
→
6
C
O
2
+
6
H
2
O
Since you have a
1
:
6
mole ratio between glucose and water, you can determine how much water you would get by
12.0
g glucose
⋅
1 mole glucose
180.0 g
⋅
6 moles of water
1 mole glucose
⋅
18.0 g
1 mole water
=
7.20
g
This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.
Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by
% yield
=
6.50 g
7.20 g
⋅
100
%
=
90.3
%
You can backtrack from here and find out how much glucose reacted
65.0 g of water
⋅
1 mole
18.0 g
⋅
1 mole glucose
6 moles water
⋅
180.0 g
1 mole glucose
=
10.8
g
Explanation:
Answer:no answer,
Explanation: but if the other dude see this can you re word Wht u said it’s hard to make sense of it
A cube of iron with dimensions of 3.0 cm by 3.0 cm by 3.0 cm has a mass of 212 grams. What
is the density of the iron?
Answers
Answer:
7.85 g/cm³
Explanation:
Density is Mass/Volume
The mass is 212 grams
The volume is 27 cm³ (3 x 3 x 3 = 27)
212/27 = 7.851851852
We can estimate this to 7.85 g/cm³
Density is simply defined as the mass of a substance per unit volume of substance. It is expressed mathematically as:
[tex]Density = \frac{Mass }{Volume }[/tex]
To solve the question given above, we'll begin by calculating the volume of the iron. This can be obtained as follow:
Dimension = 3.0 cm by 3.0 cm by 3.0 cm
Volume = 3 × 3 × 3
Volume = 27 cm³Thus, the volume of the iron is 27 cm³
Finally, we shall determine the density of the iron as follow:
Mass of iron = 212 g
Volume of iron = 27 cm³
Density =?[tex]Density = \frac{Mass}{Volume } \\\\Density = \frac{212}{27}[/tex]
Density = 7.85 g/cm³Therefore, the density of the iron is 7.85 g/cm³
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When a cylinder of helium gas is left standing in the sun, the temperature of the helium reaches 31.5C. The cylinder has a volume of 60.0 L and contains 0.020 mol of helium. What is the pressure in atmospheres inside the cylinder? What is the value for R for this problem?
Answers
Answer:
The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.
The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.
Explanation:
Let suppose that helium gas inside the cylinder behaves as an ideal gas, the equation of state for the ideal gas is:
[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)
Where:
[tex]P[/tex] - Pressure, measured in atmospheres.
[tex]V[/tex] - Volume, measured in liters.
[tex]n[/tex] - Molar quantity, measured in moles.
[tex]T[/tex] - Temperature, measured in Kelvin.
[tex]R_{u}[/tex] - Ideal gas, measured in atmosphere-liters per mole-Kelvin.
If we know that [tex]V = 60\,L[/tex], [tex]n = 0.020\,mol[/tex], [tex]T = 304.65\,K[/tex] and [tex]R_{u} = 0.082\,\frac{atm\cdot L}{mol\cdot K}[/tex], then the pressured inside the cylinder is:
[tex]P = \frac{n\cdot R_{u}\cdot T}{V}[/tex]
[tex]P = \frac{(0.020\,mol)\cdot \left(0.082\,\frac{atm\cdot L}{mol\cdot K}\right)\cdot (304.65\,K) }{60\,L}[/tex]
[tex]P = 8.327\times 10^{-3}\,atm[/tex]
The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.
The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.
Aqueous solutions of ammonium sulfide and potassium hydroxide are mixed.
Precipitate:
Chemical Equation:
Complete Ionic Equation:
Net Ionic Equation:
Answers
Answer:
Chemical Equation: (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)
Complete Ionic Equation: 2NH4^+(aq) + S^2-(aq) + 2K^+(aq) 2OH^-(aq) -> 2K^+(aq) + S^2- (aq) + 2NH4OH(s) 2NH4^+(aq) + OH^-(aq) -> NH4OH(s)
Explanation:
. One mole of N2O4 contains ___________.
Answers
two nitrogen
four oxygen
How to know when a line spectrum is produced.
A line spectrum is produced when the electron moves from one energy level ___. Fill in the blank PLEASE HELP I WILL GIVE BRAINLEST AND GIVE 5 STAR FOR FIRST RIGHT ANSWER
Answers
Answer:
A line spectrum is produced when the electron moves from one energy level to a lower energy level.
Answer:
Explanation:
...from one energy level to a lower energy level
The compound FeCl3 is made of
three molecules of iron chloride.
one atom of iron and three atoms of carbon.
one atom of iron and three atoms of chlorine.
two atoms of iodine, one atom of iron, and one atom of carbon.
Answers
Answer:
one atom of iron and three atoms of chlorine.
Explanation:
I just took the test and made a 100 and im really good that this because it so easy.
The compound FeCl₃ is made of one atom of iron and three atoms of chlorine.
Let's consider the chemical formula for iron (III) chloride: FeCl₃.
Fe stands for iron and its subscript (1) means that there is 1 atom in the molecule.Cl stands for chlorine and its subscript (3) means that there are 3 atoms in the molecule.Let's consider which of the following is true for iron (III) chloride.
The compound FeCl₃ is made of:
three molecules of iron chloride. FALSE. It is made by 1 molecule of iron (III) chloride. one atom of iron and three atoms of carbon. FALSE. There is no carbon in the molecule. one atom of iron and three atoms of chlorine. TRUE. two atoms of iodine, one atom of iron, and one atom of carbon. FALSE. There is no iodine in the molecule.The compound FeCl₃ is made of one atom of iron and three atoms of chlorine.
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In a thermonuclear device, the pressure of 0.5 liters of gas within the bomb casing reaches 4.0 x 10^6 atm. When the bomb casing is destroyed by the explosion, the gas is released into the atmosphere where it reaches a pressure of 1.00 atm. What is the volume of the radioactive gas after the explosion?
please help for the love of god
Answers
Answer:
Great Rapids White Water Rafting Company rents rafts for $125 per hour. Explain why the point, (0,0) and (1, 125) are on the graph of the relationship and what these points mean in the context of the problem. * 100 points
Explanation:
Which element is oxidized in the reaction below?
2Na+ Br2 → 2NaBr
Answers
Answer:
Bromine
Explanation:
Br2 is an oxidizing agent, Na is a reducing agent.
Which of the following is an example of a chemical change? *
A Nitrogen and oxygen mix to form air
Salt dissolves in a glass of water
Hydrogen and oxygen to form water
a solid changes to a liquid
Answers
Answer:
hydrogen and oxygen to form water
What determines which element an atom is ?
The number of neutrons
The number of electrons
The size of the atom
The number of protons
Answers
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
hope this helps, if not, your free to give me 1 star
help on this question
Answers
Answer:
A
Explanation:
Hopefully this helps.
i need help with gas law problems