Rank these transition metal ions in order of decreasing number of unpaired electrons.
Rank from most to least unpaired electrons. To rank items as equivalent, overlap them._____________________________Fe^3 , Mn^4+ , V3+ , Ni^2+ , Cu^+
Answers
With five, Fe³⁺ has the most free electrons, followed by Ni²⁺ with two, and Mn⁴⁺ with none. Both Cu⁺ and V³⁺ have a single unpaired electron.
To rank these transition metal ions in order of decreasing number of unpaired electrons, we need to examine their electronic configurations.
Mn⁴⁺ has a 3d3 electronic configuration, which means that it has no unpaired electrons.
V³⁺ has a 3d2 electronic configuration, which means that it has one unpaired electron.
Ni²⁺ has a 3d8 electronic configuration, which means that it has two unpaired electrons.
Fe³⁺ has a 3d5 electronic configuration, which means that it has five unpaired electrons.
Cu⁺ has a 3d10 electronic configuration, which means that it has one unpaired electron.
Therefore, the order of decreasing number of unpaired electrons is:
Fe³⁺ > Ni²⁺ > V³⁺ = Cu⁺ > Mn⁴⁺
In summary,Fe³⁺ has the most unpaired electrons with five, followed by Ni²⁺with two, while Mn4+ has no unpaired electrons. Cu⁺ and V³ both have one unpaired electron, making them equivalent in terms of the number of unpaired electrons.
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Related Questions
A solution of tartaric acid (H₂C₄H₄O₆) with a known concentration of 0.155 M H₂C₄H₄O₆ is titrated with a 0.425 M NaOH solution. How many mL of NaOH are required to reach the second equivalence point with a starting volume of 70.0 mL H₂C₄H₄O₆ , according to the following balanced chemical equation: H₂C₄H₄O₆ + 2 NaOH → Na₂C₄H₄O₆ + 2 H₂O
Answers
The volume of NaOH required to reach the second equivalence point is 51.1 mL with a starting volume of 70 ml tartaric acid with concentration known of 0.155 M.
Given, concentration of tartaric acid = 0.155 M
Volume of tartaric acid = 70.0 mL= 0.0700 L
Concentration of NaOH = 0.425 M
We can write the balanced chemical equation for the reaction between tartaric acid and NaOH as follows:
H₂C₄H₄O₆ + 2 NaOH → Na₂C₄H₄O₆ + 2 H₂O
We can see that the stoichiometric coefficient of NaOH is 2, which means it reacts with 2 moles of tartaric acid to form 1 mole of Na2C4H4O6.
So, we can write the following relation:
Number of moles of NaOH = 1/2 × number of moles of tartaric acid Before the equivalence point, tartaric acid reacts with NaOH in 1:1 molar ratio.
So, for the first equivalence point, we have:
Number of moles of NaOH = number of moles of tartaric acid
At the second equivalence point, all the tartaric acid is neutralized and the excess NaOH reacts with the formed sodium tartrate in 1:1 molar ratio.
Therefore, we have: Number of moles of NaOH = 1/2 × number of moles of tartaric acid that reacted in the first equivalence point
Let V be the volume of NaOH required to reach the second equivalence point.
At this point, the number of moles of tartaric acid reacted = 2 × 0.155 × 0.0700 = 0.0217 mol
We know that, Number of moles of NaOH = 1/2 × number of moles of tartaric acid that reacted in the first equivalence point0.0217 mol NaOH = 1/2 × 0.155 mol tartaric acid
Hence, the number of moles of tartaric acid that reacted in the first equivalence point = 0.0433 mol
So, the number of moles of NaOH used to react with sodium tartrate in the second equivalence point = 1/2 × 0.0433 mol = 0.0217 mol
We can now use the molarity of NaOH and the number of moles of NaOH to calculate the volume of NaOH used:
Concentration of NaOH = Number of moles of NaOH / Volume of NaOH0.425 M = 0.0217 mol / Volume of NaOH
Volume of NaOH = 0.0217 mol / 0.425 M= 0.0511 L= 51.1 mL
Therefore, the volume of NaOH required to reach the second equivalence point is 51.1 mL.
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How many liters are in 17.5 g of potassium sulfate?
Answers
Answer:
66.24 liters
Explanation:
A) 2 and 3 only
B) 1 and 4 only
C) 2,3,4 only
D) all of the above
choose one correct answer
Answers
Answer:
D
\( \: \: \: \: \)
If the calcium hydroxide was determined to have a pH of 12.55, and it was made in 200.0 mL of water, then the mass required to prepare it would have been ___g
Answers
To calculate the mass of calcium hydroxide required to prepare a 200.0 mL solution with a pH of 12.55, we first need to determine the concentration of hydroxide ions in the solution using the pH value.
The pH of 12.55 corresponds to a hydroxide ion concentration of 2.00 x 10^-3 M. This is because pH is defined as the negative logarithm of the hydrogen ion concentration, and in a basic solution, the hydroxide ion concentration is equal to the hydrogen ion concentration multiplied by the concentration of water (which is approximately 55.6 M at room temperature). So:
pH = -log[H+]
pH = 14 - log[OH-]
12.55 = 14 - log[OH-]
log[OH-] = 1.45
[OH-] = 10^-pOH
[OH-] = 10^-12.55
[OH-] = 2.00 x 10^-3 M
The molar mass of calcium hydroxide is 74.093 g/mol (40.078 g/mol for calcium + 2 x 15.999 g/mol for oxygen + 2 x 1.008 g/mol for hydrogen). The number of moles of hydroxide ions in the solution is equal to the concentration multiplied by the volume (in liters) of the solution:
moles of OH- = [OH-] x volume
moles of OH- = 2.00 x 10^-3 M x 0.200 L
moles of OH- = 4.00 x 10^-4 mol
Since each molecule of calcium hydroxide dissociates into two hydroxide ions, the number of moles of calcium hydroxide required is half of the number of moles of hydroxide ions:
moles of Ca(OH)2 = 0.5 x moles of OH-
moles of Ca(OH)2 = 0.5 x 4.00 x 10^-4 mol
moles of Ca(OH)2 = 2.00 x 10^-4 mol
Finally, we can calculate the mass of calcium hydroxide required using its molar mass:
mass of Ca(OH)2 = moles of Ca(OH)2 x molar mass
mass of Ca(OH)2 = 2.00 x 10^-4 mol x 74.093 g/mol
mass of Ca(OH)2 = 0.0148 g
Therefore, the mass of calcium hydroxide required to prepare a 200.0 mL solution with a pH of 12.55 is approximately 0.0148 g.
balance the following half-reaction in basic solution. xo3- -> xh3
Answers
The balanced half-reaction in the basic solution is:
XO₃⁻ + 3H₂O -> XH₃ + 3H⁺
To balance the half-reaction XO₃- -> XH₃ in a basic solution, you need to ensure that the number of atoms and charges is balanced on both sides of the equation. Here's how you can balance it step by step:
1. Write the unbalanced equation:
XO₃- -> XH₃
2. Balance the atoms other than hydrogen and oxygen:
Since there is only one type of atom (X) on both sides, the atom is already balanced.
3. Balance the oxygen atoms by adding water (H₂O) molecules:
Count the number of oxygen atoms on the left side (3) and add the same number of water molecules on the right side:
XO₃⁻ + 3H₂O -> XH₃
Now, there are three oxygen atoms on each side.
4. Balance the hydrogen atoms by adding hydrogen ions (H⁺):
Count the number of hydrogen atoms on the right side (3) and add the same number of hydrogen ions to the left side:
XO₃- + 3H₂O -> XH₃ + 3H+
Now, there are three hydrogen atoms on each side.
5. Balance the charges by adding electrons (e⁻):
In basic solution, we need to balance the charges by adding hydroxide ions (OH⁻) on the side that is deficient in negative charge (usually the side with excess positive charge). In this case, there are 3 excess hydrogen ions (H⁺) on the left side, so we need to add 3 hydroxide ions (OH⁻) on the left side:
XO₃⁻ + 3H₂O + 3OH⁻ -> XH₃ + 3H⁺ + 3OH⁻
6. Simplify the equation by eliminating the common ions:
The hydroxide ions (OH-) appear on both sides and can be canceled out:
XO₃⁻ + 3H₂O -> XH₃ + 3H⁺
Finally, the balanced half-reaction in basic solution is:
XO₃⁻ + 3H₂O -> XH₃ + 3H⁺
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This is a sign of a chemical reaction that involves the production of bubbles or fizzing
Answers
Answer:
gas production
Explanation:
Answer:
gas formation
Explanation:
frothy bubbles produced by carbon dioxide gas are a sign that a chemical reaction has occurred when a based is mix with acid.
A teacher drops a bottle containing sodium chloride. The bottle breaks when it
hits the floor. The teacher sweeps up the mixture of sodium chloride and glass.
Describe how the teacher can obtain a pure, dry sample of sodium chloride from
the mixture.
Answers
The mixture of sodium chloride and broken glasses can be separated by dissolution, filtration, and evaporation respectively.
Separation of mixtureThe mixture containing sodium chloride and broken glasses can be separated as follos:
First, by dissolving the mixture in water. The soluble sodium chloride will dissolve while the broken glasses will remain insoluble.Filteration is carried out to filter off the broken glassesThe filtrate which is now a mixture of water and sodium chloride can then be heated to evaporate off the water and to obtain dry sodium chloride.More on separating mixtures can be found here: https://brainly.com/question/863988
You are working in the lab, how many grams of solute you need to make 200.0 g of 3.4% of solution?
Answers
Answer:
6.8g of solute are needed
Explanation:
Percent by mass, (w/w%) is defined as the mass of solute in 100g of solution. A solution that is 3.4% contains 3.4g of solute in 100g of solution. That means to make 200g of solution are required:
200g solution * (3.4g solute / 100g solution) = 6.8g of solute are needed
when do you use the roman numerals when naming ionic compounds
Answers
Oxidation State
In chemistry, when naming ionic compounds there will sometimes be a roman numeral after the first element. This number represents the oxidation state of the element. An oxidation state is defined as the hypothetical charge of an atom, assuming that all of its bonds are fully ionic. In other words, the oxidation state shows how many electrons an atom gives or receives after ionization.
In ionic compounds, there will only ever be a roman numeral after the first element. This element will always be the cation (positively charged ion). So, the roman numeral will show how many electrons each cation gave.
When Roman Numerals are Necessary
This is necessary when you deal with transition metals or any other element that has multiple oxidation states. For example, iron can give 2 or 3 electrons. So, when naming a compound with iron you need to use a (II) or (III) to show how many electrons each iron atom gave.
When Roman Numerals are Unnecessary
On the other hand, roman numerals are unnecessary when using an element that only has one possible oxidation state. For example, Na can only give 1 electron ever, so it does not need a roman numeral. Additionally, elements in the second group like Mg can only ever give 2 electrons, so they also don't need a roman numeral to follow their name.
The amount of stored chemical energy is what determines the temperature of a substance.
Answers
Answer:
False
Explanation:
Temperature is also heat energy, so chemical energy has no affect over it.
Answer:
False
Explanation:
The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts.
If an atom gains one electron, what charge will it have?
Answers
Answer:
It becomes negatively charged
Proton is positive, electron is negative and neutron is neutral
Explanation:
Answer:
If an atom gains one electron, it will have a negative one charge, or -1.
Electrons = Negative
Protons = Positive
Student exploitation: electron configuration
1.Elvis Perkins a Rather shy fellow, is getting on the bus shown at the right. Which seat do you think he will probably sit in mark this Seat with an “E”?
2. Marta Warren Gets on the bus after Elvis. She is tired after a long day at work where do you think she will sit mark the seat with an “M”?
Answers
Answer:
1. He will sit in the back where the other person is not sitting. Second column, fourth row.
2. Marta will sit in the front where it is not far. First column, first row.
Explanation:
Elvis being a shy individual and coming in first will seat to the left of the empty seat at the back while Martha who is tired will seat on left position on the first row
The choice of Elvis position would be determined by his shy attitude, hence, he will like to seat alone. Therefore, the empty seat at the back would favor Elvis. As for Martha, her choice of seat would be where he'll get less disturbance and also prefer a position to rest. Since she's tired, she'll find it difficult to walk to the back seat. Hence, the left position on the first row.Learn more :https://brainly.com/question/20654056
When an atom gives up or accepts an extra electron, so that the number of protons no longer is equal to the number of electrons, the result is O an isotope O a neutron .O an ion O a mineral
Previous question
Ne
Answers
An Ion.
An Ion has the same number of protons but loses or gains electrons, which make it either positively or negatively charged.
An ion that had lost electrons, because they need a full outer shell and perhaps they had too many electrons, and given to another atom becomes positively charged. This is because electrons are negatively charged, losing them makes the whole atom positive. Since there are now more positive protons than negative electrons.
But why don't atoms have a charge?
Because the number of electrons and protons are the same so, they cancel each other out and have a neutral charge.
So, if an atom accepts another electrons, maybe to fill in an outer shell to make it positive. It will become negatively charged as it now has more electrons than protons.
What is the empirical formula of a compound composed of 72. 36% fe and 27. 64% o by mass?.
Answers
The empirical formula of the compound is Fe₂O₃, representing the simplest mole ratio of Fe and O.
The empirical formula represents the relative proportion of elements in a compound, showing the simplest, whole-number ratio of atoms.
It is often referred to as the molecular formula. While molecular formulas provide the actual number of atoms in a molecule, empirical formulas convey the ratios of the elements.
In the given compound composed of 72.36% Fe and 27.64% O by mass, the empirical formula is Fe₂O₃.
To determine the empirical formula:
Assume 100 g of the compound.
Calculate the number of moles for each element.
Find the ratio of moles for each element.
Divide each mole value by the smallest mole value to obtain the simplest mole ratio.
Write the empirical formula.
Following these steps:
Assuming 100 g of the compound, there are 72.36 g of Fe and 27.64 g of O.
Calculate the moles of Fe: Moles of Fe = (72.36 g Fe) / (55.85 g/mol) = 1.294 mol Fe
Calculate the moles of O: Moles of O = (27.64 g O) / (16 g/mol) = 1.7275 mol O
The ratio of moles is Fe:O = 1.294 mol Fe : 1.7275 mol O
Dividing each value by the smallest value of 1.294, we get Fe:O = 1 : 1.33
The empirical formula is Fe₂O₃.
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Which set of the electronic structures are only found in metals?
A
2, 1
2, 8, 1
2, 8, 8, 1
B
2,5
2,6
2, 7
C 2,7
2,8,7
2, 8, 18, 7
D
2,8,3
2.8,4
2, 8, 5
Answers
Answer:
A... According to the periodic table, elements with one electron at the outermost shell or orbital are classified as alkali METALS
Analyzing models compare an atom’s structure to a ladder. Identify one way in which ladder is not a good model from the atom.
Answers
Answer:
Climbing a ladder assumes that you would touch/use each step only once. Electrons will take one layer that is empty first, and previous layers or "steps" will continue being filled with additional electrons only when every other layer is occupied by, at least, one electron.
Explanation:
A good analogy is what passengers in a bus do. Everyone tries to sit alone first and only when every pair of seats has a person already seated, people will use them as well, sitting next to each other.
help me please id appreciate it
Answers
Answer:
Thats the periodic table of elements
Explanation:
4. In the following reaction: 2NaN3 decomposes to form 2Na + 3N2. If 500 grams of NaN3 decomposes to form 320 grams of Na, how much Na is produced?
180 grams
320 grams
500 grams
Answers
mass of NaN₃ → moles of NaN₃ → moles of Na → mass of Na
500 g NaN₃ ×
1
mol NaN₃
65.01
g NaN₃
= 7.69 mol NaN₃
7.69 mol NaN₃ ×
2
mol Na
2
mol NaN₃
= 7.69 mol Na
7.69 mol Na ×
22.99
g Na
1
mol Na
= 176.8 g Na
Using Mass of N₂
You must make the following conversions:
mass of N₂ → moles of N₂ → moles of Na → mass of Na
323.20 g Na ×
2
mol N₂
28.01
g N₂
= 11.539 mol N₂
11.539 mol N₂ ×
2
mol Na
3
mol N₂
= 7.692 mol Na
7.692 mol Na ×
22.99
g Na
1
mol Na
= 176.85 g Na
why ammonia is highly soluble in water?
Answers
Answer:
yes
Explanation:
please take to 8 glasses of water everyday
David pushes the wall to the left with his finger. The
wall pushes David to the right. What is the action
force and what is the reaction force?
Answers
Answer:
push or pull
Explanation:
Bronze is a combination of two metals, copper and tin. Bronze is an example of a(an) ______. Make sure you have read the etext pages 24-27 in Lesson 2.07
alloy
colloid
ductile
ion
Answers
Answer:
alloy
Explanation:
k12 test is right 170%
Contrast the way the conqueror comes with the way the Pilgrims came (stanzas three and four).
Answers
Answer:
tbh id k i've never read it so if u could send the link I could help you.
Explanation:
help ? if yk the answer ? please help k
Answers
Answer:
1: X and Y
2: A
Explanation:
I need help with this question ASAP this should have 2 answers
Answers
Answer:
The correct answer is B. and C. according to me!
Answer:
A. and C.
no explanation...
the chemist adds m silver nitrate solution to the sample until silver chloride stops forming. he then washes, dries, and weighs the precipitate. he finds he has collected of silver chloride. calculate the concentration of iron(iii) chloride contaminant in the original groundwater sample.
Answers
The concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.
Given that the chemist adds m silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected of silver chloride. Let us calculate the concentration of iron(iii) chloride contaminant in the original groundwater sample.Calculating the concentration of iron(iii) chloride contaminant in the original groundwater sample
Here is the given information;
Mass of silver chloride precipitate = m grams
Volume of groundwater sample taken = V ml
Volume of AgNO3 solution used = V1 ml
Concentration of AgNO3 solution = C1
Molar Mass of AgCl precipitated = 143.5 g/mol
The molarity of AgNO3 solution is given as;
Molarity of AgNO3 = Number of equivalents / Volume of solution in liters
We know that 1 mole of AgNO3 gives 1 mole of AgCl, i.e., AgNO3 is equivalent to AgCl.Therefore, the number of equivalents of AgNO3 is the same as the number of equivalents of AgCl.
Number of equivalents of AgNO3 = C1 × V1
Number of equivalents of AgCl = m / 143.5 g/mol
Concentration of FeCl3 = (Number of equivalents of FeCl3 / Volume of sample in liters) × Molar mass of FeCl3
Number of equivalents of FeCl3 = Number of equivalents of AgNO3
Number of equivalents of FeCl3 = C1 × V1
Concentration of FeCl3 = (C1 × V1 / V) × Molar mass of FeCl3
Concentration of FeCl3 = (C1 × V1 / V) × 162.2 g/mol
Hence, the concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.
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When solid ammonium chloride is added to water, all of the solid dissolves and the solution becomes cold.
a. True
b. False
Answers
True. When solid ammonium chloride is put to water, it dissolves quickly and undergoes an endothermic reaction, meaning that heat from the environment is absorbed, cooling the solution.
A salt with no flavour or scent, ammonium chloride has a number of uses. It is frequently used in fertilisers, as an animal feed addition, and in several medical procedures. Ammonium chloride, often known as NH4Cl, is a chemical compound made up of ammonium ions (NH4+) and chloride ions (Cl-). Water rapidly dissolves ammonium chloride when it is introduced, releasing ammonium and chloride ions into the solution. Because of the endothermic nature of this process, the solution cools down as a result of heat being absorbed from the surroundings. This quality is frequently applied in cooling applications, such as cold packs.
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I JUST NEED TO KNOW THE STEPS
Answers
The chemical equation C2H2 + 2H2 C2H6 represents the reaction of acetylene (C2H2) with hydrogen gas (H2) to produce ethane (C2H6).
When hydrogen gas is introduced into an unsaturated hydrocarbon (in this example, C2H2), a saturated hydrocarbon (C2H6) is formed. The reaction takes place in the presence of a catalyst, which is usually a metal like platinum or nickel.
Two molecules of hydrogen gas (H2) combine with one molecule of acetylene (C2H2) to generate one molecule of ethane (C2H6) in the process. The carbon-carbon triple bond in acetylene is broken to yield ethane, and two new carbon-carbon single bonds are formed.
The reaction's balanced chemical equation is:
C2H2 + 2H2 → C2H6
Overall, the reaction of acetylene with hydrogen gas to create ethane is a key industrial process used in the production of a wide range of chemicals and fuels.
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Match the term to its best description.
A. Bond in which one atom is much more
electronegative than the
other
B. Determines what type of
bond will form
Electronegativity
C. A type of covalent bond
D. Positive ion
1. Metallic
2. Ionic
3. Electronegativity
4. Cation
Answers
Answer:
A) 2
B) 1
C) 3
D) 4
i hope its right
which compound contains both carboxyl and amino functional groups in the same molecule?
Answers
The compound that contains both carboxyl and amino functional groups in the same molecule is an amino acid. The amino group is NH2 and the carboxyl group is COOH.
The basic structure of an amino acid consists of a central carbon atom known as the alpha carbon. The central carbon atom is attached to an amino group (-NH2), a carboxyl group (-COOH), and an R group that is unique to each amino acid. The amino acid’s amino group and carboxyl group are bonded together via a peptide bond that is formed via a condensation reaction between the two groups.
The peptide bond, which links amino acids together to form proteins, is a covalent bond between the carboxyl group of one amino acid and the amino group of another amino acid. Hence, it is not wrong to say that an amino acid is the compound that contains both carboxyl and amino functional groups in the same molecule.
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PLEASE ANSWER ITS 32 POINTS!!!
Johnny has two balloons. He blew one up with his mouth (CO2) and then the other one with helium (He).
His little sister, Lisa does not understand why the one with helium floats, while the other one does not.
Solve for the molar mass of both CO2 and He to help explain why the balloon with He is able to float.
Answers
Answer:
The molar mass of CO2 is 44.01 g/mol, whereas the molar mass of helium is 4.002602, since the mass is so much lighter for the helium it floats upwards because it is less dense than the air around it as well as being less dense than the CO2