Question 24 of 25
How can one tell if a reaction is a redox reaction?
O A. Elements change phases.
O B. A precipitate is formed.
O C. Spectator ions are present.
O D. Electrons are gained and lost.
Answers
Answer:
D. Electrons are gained and lost
Explanation:
When electrons are gain and lost, redox reaction takes place. In redox reaction, reduction and oxidation tales place simultaneously. Therefore, option D is correct.
What is redox reaction ?Redox reactions include a change in the oxidation state of the substrate. When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.
Redox reactions are those in which there is a change in the oxidation number, with both an increase and a drop in number. The reaction called non-redox if this does not take place.
Oxidation and reduction always occur jointly because any loss of electrons by one substance must be followed by a gain of electrons by another. Therefore, oxidation-reduction processes or simply redox reactions are other names for electron-transfer events.
Thus, option D is correct.
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Related Questions
Why does a light bulb turn in When you flip the switch to on?
Answers
Explanation:
Flipping a light switch to turn on a light means that the circuit with the light is being closed. When the switch is flipped the opposite way, to turn the light off, the circuit is being opened.
Answer:
You now have an open circuit
Explanation:
The circuit is closed when the switch is flipped the other way to turn off the light.
SCIENCE
the different modes of reproduction in animals such as butterflies, mosquitoes, frogs, cats, and dogs (sexual and asexual) a. Cut and paste pictures of animals and their young that are reproduced sexually(cats, dogs, etc.) b. Cut and paste pictures of animals and their young that are reproduced asexually(butterflies, mosquitoes
pls help me! i need help i will brainlies the good answer! answer this now pls! today is the deadline!
Answers
Ans: Dogs, cats, frogs, butterflies, mosquitoes, and many other animals reproduce by sexual reproduction. Animals have gonads, organs that produce egg or sperm.
a. Cut and paste pictures of animals and their young that are reproduced sexually(cats, dogs, etc.) ???Ans: your answer is in above
b. Cut and paste pictures of animals and their young that are reproduced asexually(butterflies, mosquitoes) ????Ans: your Answer is in above
A ball rolls down a hill. It starts with velocity of 2 ms. After 2 seconds, the ball has a velocity of 12 ms. What is the acceleration of the ball? 2 ms2 4 ms2 5 ms2 7 ms2
Answers
Answer:
5 ms2
Explanation:
The acceleration of the ball is 5 ms2.
What is acceleration?Acceleration is the rate at which an object's velocity with respect to time changes. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration.
The acceleration of the car in its present direction of motion is referred to as a linear acceleration (or tangential acceleration in circular motions), and the passengers on board feel a force pressing them back into their seats as a result.
The acceleration that is used to change direction is referred to as radial acceleration (or centripetal acceleration in circular travels), and the reaction that the passengers feel is a centrifugal force.
Therefore, The acceleration of the ball is 5 ms2.
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What equation explains the relation between amperes, watts and volts?
I = W-V
I = W+V
I = W/V
I = W*V
Answers
Answer:
I = W/V
Explanation:
Comes from the Equation P=I*V where P is Power measured in Watts, I is Current measured in Amps and V is Voltage measured in Volts.
Elements that are usually dull, brittle and do not conduct electricity are know as______.
Points: 46
Answers
Answer:
nonmetal
Explanation:
.........
...
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what are three physical properties with constant value
Answers
Answer: Certain physical constants (e.g., melting point, boiling point, density, refractivity, solubility) can be found in the literature for many compounds, whereas others (e.g., specific rotation) are characteristic of different groups of compounds and are known for almost all of them.
Explanation:
one difference between a chemical formula and a chemical equation is that the chemical equation shows:
Answers
1) Which of the following is true about Earth’s plates?
a. Earth’s plates are separated by oceans.
b. Earth’s plates are piled on top of one another within the Earth.
c. Earth’s plates fit closely together with the edges of the plates touching each other.
d. Earth’s plates are surrounded by melted rock and do not touch each other.
Answers
Answer:
a because the others whould cause earthquakes
Explanation:
Answer:
A
Explanation:
because i think is A (if is not im sorry )
Please help need to turn in
Answers
Answer:
2. d
3. i
4. e
5. j
6. g
7. a
8. f
9. b
Explanation:
do a few searches when you have time to deepen understanding!
6. g
4. e
9. b
2. d
7. a
10. h
1. c
3. f
Given the speed of light as 3.00 x 10° m/s, calculate the
wavelength of the electromagnetic radiation whose frequency
is 9.500 x 101° Hz.
Answers
Answer:
the answer is mabye 30 I didnt understand
How to get rid of high cholesterol?!
Please tell me
Answers
you have to drink a lot of water and 67890
What is the difference between a conductor and an insulator?
Answers
An insulator does the opposite and instead, stops either from going through. Examples of an insulator is paper, wood, rubber, etc.
Ca+P criss cross method
Answers
Answer:
[tex]t \o \: know \: the \: answer \: [/tex]
[tex]refer \: to \: the \: attatchment[/tex]
Explanation:
Hope this helps !!Who ever gets it right I will give brainly and 20 points
Answers
Answer:
LETTER C it can apply a greater output force over a greater distance compared to the input force and distance
Explanation:
i just know cause im smart like that
The electron configuration of a cation with a 2+ charge is shown below.
1s22s22p63s23p6
What is the electron configuration for the ion's neutral parent atom? The atom is a main group
element. Name the group that the parent atom likely belongs to on the Periodic Table and identify
one chemical property of the parent atom.
Answers
The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³
From the question,
The cation has a charge of 2+. This means the neutral atom lost 2 electrons.
From the given electron configuration, the cation has 18 electrons.
Therefore, the neutral atom of ion will have 20 electrons.
∴ The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
The atom belongs to group 2 on the periodic table.
One chemical property of the parent atom
Its density is 1.54 g/cm³
Hence, The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³
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Give one use of magnesium chloride
Answers
Answer:
Magnesium Chloride is used as a precursor magnesium metals.
Explanation:
Students set up a controlled experiment. They put five
crickets in each of three identical containers. They set one
container to 15°C, one to 20°C, and one to 25°C. Then they
count the number of cricket chirps in each container
during 1 hour
What are two constants in this experiment?
Answers
1- The number of crickets in each container
2- The kind of containers used
Please mark it as brainlest answer:).
Answer:
Here to let the other person have brainliest!!! Enjoy randomer
Explanation:
Help! It’s due in 1 minute
Answers
The answer is the last option, Zn + S ➡️ ZnS.
what is an example of force pair
Answers
he interaction between a baseball bat and a baseball
Anyone pls help me with science
Answers
Answer:
50% pups have solid fur50%, pups haven't solidfur
2. DOMINANT FF IS NOT POSSIBLE
what is an atom plz answer to get 10 points +brainliest
Answers
How did the Heisenberg uncertainty principle contribute to the idea that electrons occupy “clouds," or "orbitals”?
Answers
Answer:
Because the exact position of the electron is not known,it must be assumed that the electron takes up the entire space in an orbital.
Explanation:
What mass of aluminum must react with 100 g of copper (ii) phosphate? (10g)
Answers
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole =given mass ÷ molar mass
2 Al + 3 Cu[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] → Al[tex]_2[/tex] (PO[tex]_4[/tex])[tex]_3[/tex]+ 3 Cu
moles of copper phosphate= 100 g/380.58
=0.26 moles
3 moles of copper sulphate need 2 mole of Al
0.26 moles of copper sulphate need (2/3)×0.26
=0.17moles
mass of Al= 0.17×26
=4.42g
Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
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Calculate the Enthalpy for the following reaction using the listed thermochemical equations:
Please help
Answers
Answer:
896.5
Explanation:
You want to manipulate each equation individually.
First Equation: Keep it how it is, because N2 is the same in the final and 1st equation
Second Equation: Multiply the enthalpy by 4 because you want the H2Os to be equal
Third Equation: Switch the sign of the enthalpy because you want toe H2O2 on the other side of the equation, and multiply by 2 to match the coefficient
Answer:
this might be of help to u
How does dissolving skittles apply to the real world?
Answers
Answer:
Skittles are coated with sugar and food coloring. When you add warm water to the Skittles, the sugar and food coloring start to dissolve. They have similar amounts coated on them so they dissolve at similar speeds and stay in their lanes.
The sugar is moving to areas of water with lower sugar concentration. If the water is poured in the center, this is happening for each Skittle at relatively the same speed.
Explanation:
Choose all the answers that apply.
What’s is the freezing point of water?
1. 0’c
2.32’c
3.32’F
4.0’F
Answers
Answer: The answers are the first and third options.
Answer:
1.0'c
3.32'f
Explanation:
pls answer this it's due today
Answers
Answer:
That's pretty easy,if you have a grasp of Elements, Compounds and their Symbols ans Molecular formula.
So, Let's get started!
Our reactions are as follows:
Sodium(Na) + Chlorine(Cl) ---> Sodium chloride(NaCl)Think of a compound that has both Sodium and Chlorine and is very common.
Common salt — Sodium chloride!
Yeah, that's it! It has both Sodium and Chlorine in it's molecular formula. (NaCl)
Magnesium(Mg) + Oxygen(O2) ---> Magnesium oxide(MgO)Now, we have to, somehow, get Magnesium oxide using Oxygen. The best way is: by reacting Magnesium with Oxygen.
Iron(Fe) + Sulfur(S) ---> Iron Sulfide(FeS)Now, we have to get two reactants that react to form Iron Sulfide.
FeS contains only two elements in its formula and that are: Iron(Fe) and Sulfur(S).
So, the best way would be to react Iron(Fe) and Sulfur(S) and get Iron Sulfide (FeS)
Hydrogen(H2) + Oxygen(O2) ---> water(H2O)You must know that water is H2O, that is, a compound of Hydrogen and Oxygen, the easiest way to get H2O as your product would be : by reacting Oxygen and Hydrogen.
b) magnesium (Mg)
c) Iron (Fe) + Sulfur (S)
d) oxygen (O2)
calculate the mass of sodium sample that it contains 2 Na atoms of sodium
please i need help with this ques.
Answers
Answer:
45.98 I believe if its wrong im sorry
What are ocean currents?
Answers
Answer:
What are ocean currents?Ocean currents are continuous movements of water in the ocean that follow set paths, kind of like rivers in the ocean.PLEASE HELP CHEMISTRY
What is the hydronium ion concentration of a solution with a POH of 6.90?
O 6.29 x 10-7 M
6.53 x 10-7 M.
O 7.18 x 10-8 M
O 7.94 x 10-8 M
Answers
Answer:
O 7.94 x 10-8 M
Explanation:
Did the test
The hydronium ion concentration of a solution with a pOH of 6.90 is 7.94 × 10⁻⁸ M.
What is the relation between pH & pOH?Relation between the pH and pOH will be represented by the below equation as:
pH + pOH = 14
Given that pOH = 6.90
So, pH = 14 - 6.90 = 7.1
Also we know that, pH = -log[H⁺]
[H⁺] = [tex]10^{-pH}[/tex]
[H⁺] = [tex]10^{-7.1}[/tex]M
[H⁺] = 7.94 × 10⁻⁸ M
Hence the concentration of hydronium ion is [tex]10^{-7.1}[/tex] M.
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