Answer: [tex]Fe^{2+}:24:[Ar]3d^5[/tex]
[tex]Mn^{2+}:23:[Ar]3d^5[/tex]
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies.
The electronic configuration for given elements is as follows:
[tex]Fe:26:[Ar]3d^64s^2[/tex]
[tex]Fe^{2+}:24:[Ar]3d^5[/tex]
[tex]Fe^{3+}:23:[Ar]3d^4[/tex]
[tex]Mn:25:[Ar]3d^54s^2[/tex]
[tex]Mn^{2+}:23:[Ar]3d^5[/tex]
[tex]V:23:[Ar]3d^34s^2[/tex]
[tex]V^+:22:[Ar]3d^34s^1[/tex]
[tex]Sc:21:[Ar]3d^14s^2[/tex]
[tex]Sc^{2+}:19:[Ar]3d^1[/tex]
1.Convert 2.37 moles of Al(NO3)3 to grams.. Single choice.
(25 Points)
0.011 grams
504.8 grams
438 grams
633 grams
0.0089 grams
2.Convert 456.89 grams of O2 to moles.. Single choice.
(25 Points)
28.6 moles
7.14 moles
14620 moles
14.3 moles
29241 moles
Answer:
1. 504.8 g Al(NO3)3
2. 14.3 moles O2
Explanation:
1.
g = moles x molar mass = 2.37 x 212.996 = 504.8 g Al(NO3)3
MM Al(NO3)3 = 212.996 g/mol
2.
moles = mass : molar mass = 456.89: 32 = 14.3 moles O2
Mg + HCl → MgCl2 + H2
How many liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal?
52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
What is Ideal Gas Law ?The ideal gas law states that the pressure of a gas is directly proportional to the volume and temperature of the gas.
It is expressed as
PV = nRT
where,
P is pressure
V is volume in liters
n is number of moles of gas
R is Ideal gas constant
T is Temperature in kelvin
What is Balanced Chemical equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now first we have to write the balanced chemical equation
Mg + 2HCl → MgCl₂ + H₂
Here we can se that 2 mole of hydrochloric acid produces 1 mole of hydrogen gas.
So 4 moles of hydrochloric gas will give [tex]\frac{1}{2} \times 4[/tex] moles of hydrogen gas that is 2 moles of hydrogen gas.
Now put the values in above equation, we get
PV = nRT
0.940 atm × V = 2 × 0.0821 L atm / K mol × 298
V = [tex]\frac{2 \times 0.0821\ \text{L atm / K mol} \times 298}{0.940\ \text{atm}}[/tex]
V = 52.05 liter
Thus from the above conclusion we can say that 52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
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Identify the order in which sound travels through the ear
Answer:
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
Explanation:
i don't know what are you talking about^_^
List the following molecules in order of increasing boiling point: Br2, Cl2, F2, I2.
Answer:
1. None of these have hydrogen bonding.
2. None of these have dipoles.
3. Bigger molecules will have stronger London dispersion forces. So I2 has the strongest forces,
and F2 will have the weakest. Correspondingly, I2 will have the highest boiling point and F2 will have the lowest boiling point.
Answer: F2, Cl2, Br2, I2
Explanation:
The order of the boiling points of the given molecules are required.
The required order is [tex]F_2,Cl_2,Br_2[/tex] and [tex]I_2[/tex].
The boiling points of the molecules are
[tex]Br_2=58.8^{\circ}\text{C}[/tex]
[tex]Cl_2=-34.04^{\circ}\text{C}[/tex]
[tex]F_2=-188.13^{\circ}\text{C}[/tex]
[tex]I_2=184.4^{\circ}\text{C}[/tex]
So, the increasing order of the boiling points are [tex]F_2,Cl_2,Br_2[/tex] and [tex]I_2[/tex].
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ASAP
Which best represents a heterogeneous mixture?
A- Sand at the beach
B- Vegetable oil
C- a solution of sugar and water
Answer:
A- Sand at the beach
Explanation:
It is not chemical. Trust me its A!
what is the equation relating to the energy separation between levels in the H atom to the number of the level (n) called?
Answer: https://study.com/academy/answer/complete-the-sentence-concerning-the-energy-level-diagram-for-the-hydrogen-atom-the-equation-relating-the-energy-separation-between-levels-in-the-h-atom-to-the-number-of-the-level-n-is-called-the-equation.html#:~:text=Answer%20and%20Explanation%3A,is%20called%20the%20Bohr's%20equation.
Bohr's equation
Explanation: https://study.com/academy/answer/complete-the-sentence-concerning-the-energy-level-diagram-for-the-hydrogen-atom-the-equation-relating-the-energy-separation-between-levels-in-the-h-atom-to-the-number-of-the-level-n-is-called-the-equation.html
Answer and Explanation: The equation relating the energy separation between levels in the H atom to the number of the level (n) is called the Bohr's equation.
The diameter of a red blood cell is about 3 × 10−4 in. What is its diameter in centimeters?
Answer:
1 in. =2.54 cm
3*(10^-4)*2.54=7.62*10^-4
Explanation:
What is the volume of 1 mole of gas at standard temperature and pressure
Answer:
22.414 dm3
Explanation:
this is the answer
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
Answer:
The final temperature of the gas would need to be approximately 158.4 K
Explanation:
The details of the sample of nitrogen gas are;
The initial temperature of the nitrogen gas, T₁ = 22.7°C = 295.85 K
The initial volume occupied by the gas, V₁ = 12.2 L
The initial pressure of the gas, P₁ = 150.4 kPa
The final volume of the gas, V₂ = 9.7 L
The final pressure of the gas, P₂ = 101.3 kPa
Let 'T₂', represent the final temperature of the gas, by the ideal gas equation, we have;
[tex]\dfrac{P_1 \times V_1}{T_1} = \dfrac{P_2 \times V_2}{T_2}[/tex]
[tex]\therefore \ T_2 = \dfrac{P_2 \times V_2 \times T_1 }{P_1 \times V_1}[/tex]
Plugging in the values gives;
[tex]\therefore \ T_2 = \dfrac{101.3 \, kPa \times 9.7 \ L \times 295.85 K}{150.4 \ kPa \times 12.2 \ L} \approx 158.4327959 \ K[/tex]
The final temperature of the gas, T₂ ≈ 158.4 K
Which bonds form in the reaction shown in the diagram? 2 2H, + 0 H-H O=0 H-H → 2H 0 H-0-H H-OH A. The bonds between the two hydrogen atoms and between the two oxygen atoms B. The bonds between the two hydrogen atoms C. The bonds between the oxygen and hydrogen atoms D. The bonds between the two oxygen atoms
The water molecule is formed by the covalent bonding between oxygen and hydrogen atoms. Therefore, option C is correct.
What is covalent bonding ?Covalent bonding is a type of chemical bonding that involves the sharing of electrons between two atoms. In covalent bonding, the two atoms share a pair of electrons to fill their outermost electron shell and form a stable molecule.
This type of bonding usually occurs between non-metal atoms, which have a high electronegativity and tend to attract electrons strongly. In a covalent bond, the shared electrons are attracted to the positively charged nuclei of both atoms, creating a strong bond.
The strength of the bond depends on the number of shared electrons and the distance between the nuclei. Covalent bonds can be either polar or nonpolar, depending on the electronegativity difference between the two atoms.
In water the bond is formed between oxygen atom and two hydrogen atoms. Hence, C is correct.
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List the number of each type of atom on the right side of the equation
MgS(aq)+2CuCl2(aq)→2CuS(s)+MgCl2(aq)
I get the left side correct, but not the right. Not sure what I am doing wrong.
Answer: 2 copper, 2 Sulfur, 1 Magnesium, 2 Chlorine.
Explanation:
Wasn't sure if this was what you were looking for, but thought if you got the left side that was all you needed?
Can y’all help me with this question
Answer:
owa owa
Explanation:
owa owa owa owa owa ow
Phosphorous pentachloride decomposes according to the reaction
PCl5(g)=PCl3(g)+Cl2(g)
A 12.3 g sample of PCl5 is added to a sealed 1.50 L flask and the reaction is allowed to come to equilibrium at a constant temperature. At equilibrium, 31.8% of the PCl5 remains. What is the equilibrium constant, Kc, for the reaction?
Question is asking for Kc
Answer: The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
Explanation:
Initial concentration of [tex]PCl_5[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}\times Volume in L}}=\frac{12.3g}{208.2g/mol\times 1.50L}=0.039M[/tex]
Equilibrium concentration of [tex]PCl_5[/tex] = [tex]\frac{31.8}{100}\times 0.039=0.012M[/tex]
The given balanced equilibrium reaction is,
[tex]PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]
Initial conc. 0.039 M 0 M 0 M
At eqm. conc. (0.039-x) M (x) M (x) M
Given : (0.039-x) = 0.012
x = 0.027
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[Cl_2]\times [PCl_3]}{[PCl_5]}[/tex]
Now put all the given values in this expression, we get :
[tex]K_c=\frac{0.027\times 0.027}{0.012}=0.061[/tex]
The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
How is a kcal or Calorie different from a calorie?
Answer: It is different.
Explanation:
kcal is math while calorie is different in nutrition.
A car gets 23.7 miles per gallon of gasoline. A full tank of gasoline contains 75.0 liters. How many miles can this car travel on a full tank of gasoline show me step by step the formula
Answer:
Explanation:
3.79 liters in one gallon.
75.0 / 3.79 = 19.79 gallons of gasoline
19.8 x 23.7 = 469 miles per tank
What is 72.9 g HCI into moles
Meaning of chemistry
Answer:
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.
Explanation:
hope thats helps
Who knows any four object in which all three States of matter co-exist
Answer:
Water
Explanation:
It is because water can be in a solid state which is ice, liquid state which is the water and gas which is the steam that comes from water
Explanation:
water as a matter could co-exist in four forms
Scientists have concluded that the uppermost part of the mantle is partially-molten. Which observation helped them reach this conclusion?
Both P and S waves slow down when they reach this layer.
Both P and S waves speed up when they reach this layer.
P waves do not travel through this layer.
S waves do not travel through this layer.
Answer:
Both P and S waves slow down when they reach this layer
Explanation:
The asthenosphere is the uppermost part of the mantel and is also called the magma chamber. This layer s partly molten in the state is tectonically weak and is a ductile region. It almost solid and seismic waves tend to be relatively slow through the asthenosphere. The upper-most part of the asthenosphere is believed to be of great rigidity and the brittle lithosphere.What defines an Arrhenius base?
Answer:
An Arrhenius base is a compound that increases the OH − ion concentration in aqueous solution. The reaction between an Arrhenius acid and an Arrhenius base is called neutralization and results in the formation of water and a salt.
Explanation:Hope this helps :)
Help pls name the molecule shown in the figure.
Answer:
2ethylhexane
Explanation:
Is hydrogen an intermolecular or intramolecular form of bonding. Explain your answer with molecular illustrations
Answer:
Hydrogen bonds can be intermolecular (occurring between separate molecules) or intramolecular (occurring among parts of the same molecule).
Explanation:
Hydrogen bonds can be intermolecular (occurring between separate molecules) or intramolecular (occurring among parts of the same molecule). Hope this helps.
Chemistry problem somone help!!
Answer:
Try to figure it out U CAN DO THIS I BELIEVE
Explanation:
Name the following binary compound
A.CA3N2
B.ALCL3
C.MGS
D.SO2
E.NO
F.PCL3
Answer:
A,Calcium nitride
B,Aluminum chloride
C,Magnesium sulfide
D,Sulfur dioxide
E,Nitrogen monoxide
F,Phosphorus trichloride
Based on the balanced equation , the molar ratio of CuCl2 to Al should be
Answer:
1) The chemical equation is:
Al + CuCl2 ---> Cu + AlCl3
2) You have to balance the equation to state the coefficients:
2Al + 3CuCl2 ---> 3Cu + 2Al Cl3
3) Now the coefficients tell you the molar ratios.
2 mol Al : 3 mol CuCl2 : 3 mol Cu : 2 mol AlCl3
4) The molar ratio of CuCl2 to Al is:
3 mol Cu Cl2 / 2 mol Al = 3/2 = 1.5
Explanation:
I just need my answers checked please be quick
Answer:
they are all right
Explanation:
Which substance will form a solution when mixed with solid sodium chloride?
A. Cl2(g)
B. NaO2(s)
C. CCI4(I)
D. CH3OH(i)
Answer:
NaO2
Explanation:
Solutions are mixtures that are homogenous and comprise solutes and solvents. Methyl alcohol will react with solid sodium chloride to form a solution. Thus, option D is correct.
What are the solutions?The solutions are the mixtures of the solute and the solvent. The solute and the solvent are capable of forming a solution only if they both are either polar or nonpolar.
Here, chlorine is a gas, and sodium superoxide is a solid that cannot react with solid sodium chloride to make a solution and hence is eliminated. As sodium chloride is polar it cannot react with nonpolar carbon tetrachloride.
Methyl alcohol is polar and so is sodium chloride. They will react together as,
CH₃OH + NaCl → CH₃Cl + NaOH
Therefore, option D. CH₃OH will react to form a solution.
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Which of the following shows the completed and balanced reaction for the replacement
reaction shown below?
Al + H2S04 ?
Answer:
D
Explanation:
For replacement reactions you have to combine A and C (which is Al and SO4)
Now we have
AlSO4
The problem is that the charges do not match
SO4 has a 2 charge and Al has a 3 charge
Crossing the charges will get us..
Al2(SO4)3 which leaves D
(5) Discuss 5 Features of soft water
Explanation:
1. It is high in sodium
2. Has low percentage of hardness minerals such as magnesium and calcium.
What volcano poses a threat on Sicily
Answer:
Mount Etna I believe
Explanation: