Which half-reaction correctly describes an oxidation?
Upper C a (s) plus 2 e superscript minus right arrow upper C a superscript 2 plus (a q).
Upper B r subscript 2 plus 2 e superscript minus right arrow 2 upper B r superscript minus.
Upper N a superscript plus (a q) right arrow upper N a (s) plus e superscript minus.
Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.

Answers

Answer 1

Answer: The Answer was D. These people trolling. Look at the attachments I put on

Explanation:

Which Half-reaction Correctly Describes An Oxidation?Upper C A (s) Plus 2 E Superscript Minus Right Arrow
Answer 2

An oxidation half reaction is one in which electrons are lost. Hence the reaction, Cr^3+(aq) ----> Cr(s) + 3e is an oxidation reaction.

What is oxidation?

The term oxidation has to do with the loss of electrons. When an oxidation half reaction takes place, a specie loose electrons. We will now look out for the reaction in which electron loss takes place.

Now, in option D, the reaction is Cr^3+(aq) ----> Cr(s) + 3e. Three electrons where lost here hence this is an oxidation half reaction.

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Related Questions

what is the name for C3Cl8 and is it a covalent or polar covalent bond?

Answers

Answer:

Propane, octachloro- | C3Cl8 - PubChem

The name of C3Cl8 is octachloropropane. It is a covalent bond.

What are covalent bonds ?

Covalent bonds are formed when two atoms share electrons. In the case of octachloropropane, the carbon atoms share electrons with the chlorine atoms. The electrons are shared unequally, so the bond is polar covalent.

The name octachloropropane is derived from the Greek words "octo" (eight) and "chloro" (chlorine). The prefix "octa" refers to the number of chlorine atoms in the molecule. The suffix "propane" refers to the three carbon atoms in the molecule.

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how many moles of carbon are in 3.0 moles of c6h12o6

Answers

Answer:

i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.

Which is the right answer?

Answers

Answer:

i think its C

Explanation:

How many molecules of excess reactant remain after the reaction is complete?
2 H2 + O2 --> 2 H2O
O 4

O 2

O 6

O 8

Answers

8


It’s 8 bc I said it was 8 ;)

Name the change of state when a liquid becomes a gas

Answers

Answer: Evaporation

Explanation: the process of turning from liquid into vapor

Which type of bond shares the electrons between two elements?

Answers

Answer:

Covalent Bonds

General Formulas and Concepts:

Different types of bonds

Explanation:

We have 3 types of bonds: Polar Covalent, Nonpolar Covalent, and Ionic bonds.

Nonpolar Covalent bonds share the electrons equally between the compound.

Polar Covalent bonds do NOT share the electrons equally, but STILL SHARE the electrons; the electron tends to stay with the element with the stronger electron affinity and thus creates dipoles.

Ionic bonds DO NOT share electrons. The electrons are transferred to the respective elements.

According to Charles’ Law, if I __________ the Kelvin temperature, it will __________ the volume.

Answers

Answer:

increase is the answer for both ig?

{b}
In experiment B. the iron filings weighed 2.0g at the beginning of the experiment
and the iron sulphide produced weighed 2.8g.
Explain this increase in mass.

Answers

Explanation:

The increase in mass is because the iron fillings have combined with a sulfide to produce iron sulfide and so the mass will increase.

In such a reaction like this, the mass of the reactants must be conserved. By so doing, the mass of reactants and products must be the same.

When two substances combine together, their masses added up to that of the individual masses. This helps to conserve the mass.

is this anwser correct

Answers

Yes it is correct I think not for sure

Answer:

Yes. It is definitely correct

Ionization energy definition?

Answers

Answer:

In physics and chemistry, ionization energy or ionisation energy, is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.

I hoped this helped :D

Explanation:

A scientist is breeding orange butterflies in the laboratory she notices a white butterfly in the latest generation of animals she sequences the genome of this butterfly in notices a mutation in the genes that calls for pigment in the wings. Explain how this mutation would result in a white butterfly.

Answers

Answer:

See explanation

Explanation:

A gene mutation can be defined as a permanent change in the DNA sequence that composes a gene, resulting in the observation that the sequence differs from what is obtainable in most individuals that make up the  population. Mutations range from a change in a single DNA building block (change in the sequence of base pairs) to changes in a large segment of a chromosome that includes multiple genes.

Mutation in the color of the wings of the housefly can be passed on to the next generation. If this trait enhances survival of the butterflies, the orange winged butterflies will eventual become extinct and become entirely replaced by the white winged butterflies. This implies that gene pool has been completely modified.

If same kind of mutation of pigmentation of wings is observed in the butterfly then they will result in a white butterfly.

What is mutation?

If a gene of the DNA get damaged or changes in such a way that it also results in the changing of genetic message carried by that gene and this process is known by the name of mutation.

In the given question by breeding orange butterfly with a white butterfly in the latest generation of animals, notices a mutation in the genes that calls for pigment in the wings. If the mutation of pigmentation of wings is passed to the next generations with the  same changes in the gene of DNA, then after some generation we would get white butterfly.

Hence, if the same changes observed in the mutation of pigmentation of wings then we get a white butterfly.

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Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature. *

liquids
gases
metals

Answers

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Chemical bonds.

Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature.

The answer is Liquids

Water tends to be liquids at the room temperature.

difference between acids and bases in terms of ions

Answers

Answer:

The answer will be listed below.

Explanation:

An acid is a substance that produces (H+) as the only positive ion when mixed with water. A base is a substance that produces (OH–) as the only negative ion when mixed with water.

Answer:

An acid increases the concentration, A base is a substance that releases hydroxide

Explanation: A base donates electrons and accepts protons, and acid is a substance that donates protons.

will mark brainliest please help!!!

Answers

Answer:

1. C
2. E
3. F
4. D
5. A

Which two is it brainliest and 100points:)

Answers

Answer:

b c

Explanation:

Answer:C

Explanation:

Any 1 know These Chemicals??

Answers

Answer:

A) 1 & 2 only

Explanation:

Seeing that the chemicals present are in question one I take it you are asking about that question.

Decreasing the concentration causes a decrease in reaction process and also the total amount of product you would get out of the given reaction

Decreasing the temperature causes the molecules in this reaction to become less excited or reactive, thus causing the reaction to slow down

please help
How many joules of heat are needed to raise the temperature of 250 g of liquid weer by 500°C

Answers

Answer:

What is the total number of joules of heat energy needed to 16) How many joules of heat ... raise the temperature of 10 grams of water from 20°Сto ... 2) · The temperature of 100 grams of water changes from 16°C/7How many kilojoules of ... temperature of 500. grams of water from 10.0°C to 30.0°C? ... m250 -Q=209051. | c= ...

Explanation:

I hope I help :))

Carbon dioxide consists of a central carbon atom with an oxygen atom on each side. Draw a model of the molecule formed by putting lines between the atoms to represent bonds so that each atom has the correct number of bonds.

Answers

Explanation:

Structure of Carbon dioxide is in the attachment.

Here,

Hybridization of Carbon is sp

Bond angle 180°

Structure = linear

Single bond consists of sigma bond. Double bond consists of one sigma and one pie bonds. Triple bond consists of one sigma and two pie bonds.

Answer:

O=C=O

Explanation:

this is all you need

Which of the following is a balanced equation for the reaction described below?
Aqueous copper (II) chloride reacts with solid aluminum to produce aqueous aluminum chloride and solid copper.

A) CuCl2(aq) + Al(s) = AlCl3(aq) + Cu(s)
B) 3Cu2 Cl(aq) + Al(s) = AlCl3(aq) + 6Cu(s)
C) CuCl(aq) + Al(s) = AlCl(aq) + Cu(s)
D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)

Answers

The correct answer is b

The balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)

From the question,

We are to determine which of the given equation for the described reaction is balanced.

The described reaction is the reaction between aqueous copper (II) chloride and solid aluminum to produce aqueous aluminum chloride and solid copper.

That is,

CuCl₂(aq) + Al(s) = AlCl₃(aq) + Cu(s)

Now, we will balance the above equation, using the smallest whole number coefficients

The balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s)

Hence, the balanced equation for the reaction is

3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)

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which has a greater atomic size carbon or boron

Answers

Answer: Boron

Explanation:

hope this helps

Answer: Boron.

Explanation: The trend of atomic radius increases as we go from right to left on a periodic table, so since Boron is further left, Boron has a slightly larger radius.

Quantum Mechanics relies on probability to say what region of space an electron ismostlikelyto occupy. In your own words, describe how this principle results in the shapes ofthe orbitals.

Answers

Answer:

Explanation:

Since electrons are particles that are in constant movement in a wave-like motion, is impossible to know exactly their position and velocity at all times. That's why instead of defining an orbit for them we define an atomic orbital, which is a location in space where the probability of finding an electron is high (therefore, is an electron dense zone). Since this zone has not defined limits (the wave function characterizing the orbital extend from the nucleus to infinity), the further we go from the nucleus the less dense this "cloud" is.

There is about a 90 percent probability of finding the electron  within a sphere of radius 100 pm surrounding the nucleus.  Thus, we can represent the 1 s orbital by drawing a boundary surface diagram that  encloses about 90 percent of the total electron density in an orbital, and the shape of this orbital is a sphere.

The boundary surface diagrams of p orbitals, for example, will have the shape of two lobes on opposite sides of the nucleus, that means that within this two lobes we have a 90 percent probability of finding the electron, and so on.

Changes in which two characteristics can indicate a physical change?
A. Shape
B. Reactivity
O C. State
D. Flammability

Answers

Changes in shape and state are the two characteristics  which indicate a physical change.

What are physical changes?

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

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Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
( )O2->( )O3
1 1
2 2
3 3
Its one of the numbers for each blank space inside the parenthesis​

Answers

Answer: (1)CaSO4 -> (2)O2 + (1)CaS

Explanation: edge 2020 chem

what is the formula for calculating pH?​

Answers

A. Where the number for the concentration of H+ normally includes: times 10^#. For example, the conc. is given (or determined) as [1.00x10^-5]

a student places a small stone with a mass of 5 g into a graduated cylinder containing 50 mL of water. With the stone in the graduated cylinder, the water rises to 75 mL. What is the density of the stone?

Answers

Answer:

The answer is 0.2 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

volume = final volume of water - initial volume of water

volume = 75 - 50 = 25 mL

We have

[tex]density = \frac{5}{25} = \frac{1}{5} \\ [/tex]

We have the final answer as

0.2 g/mL

Hope this helps you

How many atoms is 3.49x1032 moles of KOH?

Answers

2.10098*10^47 atoms
Because no. Of atoms = no. Of moles * avogadros no

2.1 x 10⁵⁶ atoms

Further explanation

The mole is the number of particles(molecules,atoms,ions) contained in a substance

1 mol = 6.02.10²³

number of atoms :

[tex]\tt 3.49\times 10^{32}\times 6.02\times 10^{23}=2.1\times 10^{56}[/tex]

what is the name of the structure?​

Answers

Answer:

The structure is called Propyl ethanoate

awnser this they had no subject so i pick that for science for brainliest awnser

Answers

Answer:

B

Explanation:

What type of chemical reaction can be seen below?
C2H6 + O2 - CO2 + H2O

Answers

Carbon dioxide and water
Ethane combustion reaction 2C2H6 + 7O2 → 4CO2 + 6H2O

Is it OK for people to post fake vacation pics and other fake info on social media? Why or why not? Use facts and details from the Article to back up your answer.

Answers

Answer:

No, It is not okay to pretend on social media.

Explanation:

No, it is not okay for people to post fake vacation pics and other fake info on social media. This is very wrong, as -

This 'all time look good, feel good, have a happening life' approach of social media - implies showing only the positive side & not negative side of people's life. However, in real life is not a bed of roses. Faking things out implies that pretending to be cool has become more important than sharing deep meaningful relationships, & highlights  superficial desire of false popularity. It is also harmful to people being communicated this fake image, as they might indulge into any social involvement, on the basis of unreal image of the concerned person.

Answer:

it is not ok because there are other people that will look at those pictures and say aww i wish i were them but we all need to exept who we are

hope this helped

mark me brainliest please

Explanation:

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