Answers
Answer:
The third electron to be removed has to be in;
n = 3
l = 2
ml = -2, -1, 0, 1, 2
Explanation:
There are four basic quantum numbers;
i) principal quantum number (n)
ii) Azimuthal, Obital or Subsidiary quantum number (l)
iii) Magnetic quantum number (ml)
iv) Spin quantum number (ms)
The electronic configuration of Fe3+ is:
1s2 2s2 2p6 3s2 3p6 3d5
The third electron to be removed has to be in;
n = 3
l = 2
ml = -2, -1, 0, 1, 2
The third electron removed in the formation of a Fe³⁺ has the quantum numbers:
n: 3l: 2ml: -2Iron has an atomic number of 26, so it has the following electron configuration:
[tex]Fe: [Ar] 4s^{2} 3d^{6}[/tex]
To form cations, it first loses the electrons from the outermost shell (4s). The electron configuration of Fe²⁺ is:
[tex]Fe^{2+} : [Ar] 4s^{0} 3d^{6}[/tex]
Then, it will lose an electron from the highest energy level (3d) to form Fe³⁺.
[tex]Fe^{3+} : [Ar] 4s^{0} 3d^{5}[/tex]
The third electron lost from Fe to form Fe³⁺ was in 3d⁶.
The principal quantum number (n) coincides with the energy level: 3.The azimuthal quantum number (l) corresponding to the sublevel d is 2.The magnetic quantum number (ml) goes from -l to +l. Once each orbital has at least 1 electron (5 electrons), the second electron goes to the orbital with ml = -2.The third electron removed in the formation of a Fe³⁺ has the quantum numbers:
n: 3l: 2ml: -2Learn more: https://brainly.com/question/16746749
Related Questions
What atom has an atomic radius larger than iron? Cl Ca Se C
Answers
Answer:
Ca
Explanation:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
Which of the following best describes the difference between a heterogeneous mixture
and a homogeneous mixture?
Answers
Answer: A heterogeneous mixture means it's a mixture of two different substances, and a homogeneous mixture involves a mixture of chemicals that are alike or the same
Explanation:
My very simple trick for this is think of it like sexuality, homosexual means two people of the same sex being together, heterosexual means to be with someone of the opposite sex. Homo = same or alike. Hetero = opposite or different
How many grams of carbon dioxide are produced when 191 g of methane (CH4) are burned
completely as shown in the reaction below:
CH4 + 202 + CO2 + 2H2O
Answers
Answer:
524g CO2
Explanation:
Just took the quiz
Which of the following pieces of technology expand the sense of sight?
Bubble A. microscopes and magnifying glasses
Bubble B. eyeglasses and contact lenses
Bubble C. binoculars and telescopes
Bubble D. all of these
Answers
Answer:
D
Explanation:
They make your sight better in your daily life and all of them are used in labs and other place's
You are given 10.00 mL of a solution of an unknown acid. The pH of this solution is exactly 4.08. You determine that the concentration of the unknown acid was 0.3250 M. You also determined that the acid was monoprotic (HA). What is the pKa of your unknown acid
Answers
Answer:
Explanation:
pH = 4.08
[ H⁺ ] = 10⁻⁴°⁰⁸
= 8.3 x 10⁻⁵
concentration of acid = .3250 M
HA ⇆ H⁺ + A⁻
.325 8.3 x 10⁻⁵ 8.3 x 10⁻⁵
Ka = (8.3 x 10⁻⁵ )² / .325
= 68.9 x 10⁻¹⁰ / .325
= 212 x 10⁻¹⁰ M .
pKa = - log ( 212 x 10⁻¹⁰ )
= 10 - log 212
= 10 - 2.32
= 7.68 .
In a certain chemical reaction Compound combines with Compound to produce Compound (and no other products). Measurements were taken of the amounts of and present before and after a reaction that produced some :
Answers
Answer:
2.1 g
Explanation:
The question is incomplete and the complete question is shown in the image attached to this answer.
Now look at that image closely; you will notice that:
i) Reactant A is the limiting reactant because it was used up in the reaction.
ii) Reactant B is the reactant in excess because some mass of it was left behind after the reaction.
The mass of the product C formed is the same as the mass of the limiting reactant used up. Hence the theoretical yield of C is 2.5 g
% yield = actual yield/theoretical yield * 100
since = 83%
Actual yield = %yield * theoretical yield/ 100
Actual yield = 83 * 2.5/100
Actual yield = 2.075 g
Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 125 mL of insulin at a concentration of 50.0 mg/mL . What is the total mass of insulin in the bottle?
Answers
Answer:
the total mass of insulin in the bottle would be 3.75 g
hope this helps :)
Explanation:
c= 50 mg/mL
m = ?
v = 125 mL
c=m/v
[tex]\frac{50mg}{mL}[/tex]=[tex]\frac{m}{125mL}[/tex]
m=30×125
m=3750 mg or 3.75 g
Insulin has been the peptide hormone that is produced by the pancreatic cell of the body. The insulin solution of a concentration of 50 mg/ml has a mass of 6.25 grams.
What is insulin?Insulin has been the protein that is crucial for cell activity and function. It is a hormone that regulates the blood glucose level in a diabetic patient. The beta cell of the islets of the Langerhans of the pancreas makes insulin.
The glucose formed from the breaking of carbohydrates is controlled in the blood by insulin production so that the metabolic process can take place in an orderly manner.
Given,
Concentration of insulin hormone = 50 mg/mL
The volume of insulin in bottle = 125 mL
The mass of insulin can be calculated from the molar concentration and volume as:
Concentration = mass ÷ volume
Substituting the values above as:
50 mg/mL = mass ÷ 125 mL
Mass = 50 mg /mL × 125 mL
Mass = 6250 mg
The unit of mass is converted from milligram into gram as:
1 gm = 1000 mg
x gm = 6250 mg
x = 6.250 gm
Therefore, 50 gm/mL of concentration has 6.25 gm of insulin in it.
Learn more about insulin mass, here:
https://brainly.com/question/2800491
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To what volume (in mL) would you need to dilute 40.0 mL of a 1.25 M solution of NaCl to make a 0.0500 M solution of NaCl
Answers
Answer:
1000 mL.
Explanation:
From the question given above, the following data were obtained:
Volume of stock solution (V1) = 40 mL
Molarity of stock solution (M1) = 1.25 M
Molarity of diluted solution (M2) = 0.05 M
Volume of diluted solution (V2) =...?
The volume of diluted solution can be obtained as shown below:
M1V1 = M1V1
1.25 × 40 = 0.05 × V2
50 = 0.05 × V2
Divide both side by 0.05
V2 = 50/0.05
V2 = 1000 mL
Therefore, the stock solution must be diluted to 1000 mL to obtain a 0.05 M solution of NaCl.
Answer the question on top please with the picture choose either A or B
Answers
A mixture of gases contains 8.00 g of He, 29.96 g of Ar, and 48.00 g of O2. What is the mole fraction of He in this mixture
Answers
Answer:
0.47
Explanation:
Mole = Mass / Molar mass
Helium;
Mole = 8 / 4 = 2
Argon;
Mole = 29.96 / 39.95 = 0.75
Oxygen;
Mole = 48 / 32 = 1.5
Total mole = 2 + 0.75 + 1.5 = 4.25
Mole fraction = Mole of He / Total mole
Mole Fraction = 2 / 4.25 = 0.47
How many moles of HCl needs to be added to a solution containing 0.10 mol of NH3 to make a buffer of pH 9.26
Answers
Answer:
The correct solution is "0.05 mol".
Explanation:
According to the question,
⇒ [tex]NH_{3}(aq)+HCL(aq)\rightarrow NH_{4}^+Cl^-(aq)[/tex]
0.10 x 0
(0.10-x) 0 x
Now,
[tex]pH=pKa+log\frac{[NH_{4}Cl]}{[NH_{3}]}[/tex]
[tex]9.26=9.26+log(\frac{x}{0.10-x} )[/tex]
[tex]log(\frac{x}{0.10-x})=0[/tex]
[tex]\frac{x}{0.10-x}=1[/tex]
[tex]2x=0.10[/tex]
[tex]x=0.05[/tex] (moles of HCL needed)
Calculate the concentration of all ions present in each of the following solutions of strong electrolytes. 0.500 mole of Ca(NO3)2 in 800.0 mL of solution
Answers
Answer:
[Ca²⁺] = 0.625 M
[NO₃⁻] = 1.25 M
Explanation:
Step 1: Calculate the initial molar concentration of calcium nitrate
[Ca(NO₃)₂] = 0.500 mol / 0.8000 L = 0.625 M
Step 2: Write the reaction for the ionization of calcium nitrate
Calcium nitrate is a strong electrolyte that ionizes according to the following equation.
Ca(NO₃)₂(aq) ⇒ Ca²⁺(aq) + 2 NO₃⁻(aq)
Step 3: Calculate the concentrations of the ions
The molar ratio of Ca(NO₃)₂ to Ca²⁺ is 1:1. The concentration of Ca²⁺ is 1/1 × 0.625 M = 0.625 M.
The molar ratio of Ca(NO₃)₂ to NO₃⁻ is 1:2. The concentration of Ca²⁺ is 2/1 × 0.625 M = 1.25 M.
Global warming is heating the planet and sea ice is melting which causes sea levels to rise. What is another
factor that causes sea level rise that is also due to global warming? [Word Bank: Particle, Speed,
Collisions, Thermal Expansion, Space]
Answers
Answer:
Thermal Expansion
Which of the following is NOT an acceptable name for a vertical section of the periodic chart?
O Group
O Column
O Period
O Family
Answers
Answer:
Group
Explanation:
All the elements beyond uranium, the transuranium elements, have been prepared by bombardment and are not naturally occurring elements. The first transuranium element neptunium, NpNp, was prepared by bombarding U−238U−238 with neutrons to form a neptunium atom and a beta particle. Part A Complete the following equation: 10n+23892U→?+?01n+92238U→?+? Express your answer as a nuclear equation.
Answers
Answer:
¹₀n+ ²³⁸₉₂U → ²³⁹₉₃Np + ⁰₋₁e
Explanation:
Key statement;
The first transuranium element neptunium, NpNp, was prepared by bombarding U−238U−238 with neutrons to form a neptunium atom and a beta particle.
This is the beta particle; ⁰₋₁e
¹₀n+ ²³⁸₉₂U → Np + ⁰₋₁e
The mass number of Np;
1 + 238 = Np + 0
Np = 239
The atomic number of Np;
0 + 92 = Np + (-1)
92 + 1 = Np
Np = 93
The equation is given as;
¹₀n+ ²³⁸₉₂U → ²³⁹₉₃Np + ⁰₋₁e
Gases have no difinite volume and the least kinetic energy
O True
O False
Please answer rn
Answers
true gase doesn't have no definite volume
What molecules frorn food and air end up in the cells in the body?
Answers
Transverse waves move similar to water waves. *
true or false
WILL MARK AS BRANILIEST NEED THIS WRIGHT NOW
Answers
Answer:
False transverse waves move up and down while water waves move in circles
Explanation:
transverse waves move up and down while water waves move in circles
Answer:
I think it's True
Explanation:
Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. A Transverse waves A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves while water waves move in a circle in a left to right clockwise direction.
Chemical compounds are just like mixtures in the way their atoms are distributed.
True
False
Answers
Mark brainlyest if helpful!
Answer:
False is the correct answer to this question
determine the empriical fornula of warfarin, a rodenticide which consists of 74.01% C, 5.23% H, and 20.76% o by mass
Answers
Answer:
Explanation:
C = 74.01 %
H= 5.23 %
O=20.76 %
Ratio of moles of C , H , O
= 74.01 / 12 : 5.23 / 1 : 20.76 / 16
= 6.1675 ;5.23 : 1.2975
= 4.75 : 4.03 : 1
= 4.75 / .25 : 4.03 / .25 : 1/.25
= 19 : 16 : 4
Empirical formula
= C₁₉ H₁₆O₄ .
7th grade science.....
Answers
The answer is b
I had a test like this in 6th grade so i think im right not sure though but hopefully! :)
Which elements are likely to be the Most reactive metals, based on the
number of valence electrons? Why?*
O Group 1/1A becuase it has one valence electron
O
Group 3/3A because it has both metals and metalloids
о
Group 17/7A because it has 7 Valence Electrons
Group 18/8A because it has 8 Valence Electrons
Answers
The aircraft tire pressure at 22°C (room temperature) is usually kept at 220 psi. The maximum pressure an aircraft tire can handle before bursting is 800 psi If during
ascending/descending the temperaturenses all the way to 200°C due to friction would the tire burst? Use data from calculations as evidence, including any formulas used NOTE. Make
sure you make appropriate unit conversions (0°C = 273 K) and include initial and final conditions
Answers
The tire would not burst (352.75 < 800)
Further explanationGay Lussac's Law
When the volume is not changed, the gas pressure is proportional to its absolute temperature
[tex]\rm \dfrac{P1}{T1}=\dfrac{P2}{T2}[/tex]
P1= 220 psi
T1=22+273 = 295 K
T2=200 + 273 = 473 K
[tex]\tt \dfrac{220}{295}=\dfrac{P_2}{473}\\\\P_2=\dfrac{220\times 473}{295}=352.75~psi[/tex]
HELP ME PLEASE!!!! !!!!!!!!!!
Answers
a) What mass of aluminium nitrate (Al(NO3)3) would be required to prepare 2.000 L of a 0.0170 M aqueous solution of this salt
Answers
Answer: 7.24 g of aluminium nitrate is required to prepare 2.000 L of a 0.0170 M aqueous solution of this salt.
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
Given :
Molarity of solution = 0.0170 M
Volume of solution = 2.000 L
[tex]Molarity=\frac{n}{V_s}[/tex]
where,
n= moles of solute
[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{xg}{213g/mol}[/tex]
[tex]V_s[/tex] = volume of solution in Liter = 2.000 L
[tex]0.0170M=\frac{x}{213g/mol\times 2.000L}[/tex]
[tex]x=7.24g[/tex]
7.24 g of aluminium nitrate is required to prepare 2.000 L of a 0.0170 M aqueous solution of this salt.
whats the formula for
beryllium hypochlorite heptahydrate
Answers
Answer:
Beryllium Hypochlorite Be(ClO)2 Molecular Weight
HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!What did John Dalton
contribute to the understanding of the atom?
O A. An early form of the atomic theory
B. An early form of the periodic table
C. An article disproving Aristotle's ideas
D. A theory of quantum mechanics
Answers
Answer:
A. An early form of Atomic theory.
Explanation:
Answer:
A
Explanation:
3. What is the mass of an object with a density of 1.7 g/cm3 and a volume of 7 cm3?
4. What is the mass of an object with a density of 0.9 g/mL and a volume of 10 mL?
5. What is the volume of a substance with a density of 0.87 g/mL and a mass of 14 g?
6. What is the volume of an object with a density of 2.3 g/mL and a mass of 24 g?
Answers
Answer:
all the answer in step are in picture
How does a neutral atom of magnesium form an ion?
Answers
Answer: The magnesium ion Mg2+ is formed when the magnesium atom loses the two electrons from its outer shell to form a stable ion with a noble gas configuration.
Explanation:
plz help I give crown and 15 points
Which type of energy is being used to cook the food in the pot on the stove? *
1 point
thermal energy
radiant energy
chemical energy
mechanical energy
Answers
Answer:
I'm pretty sure me hanical