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 is the energy supplied by the cooker greater than that calculated in part (a)
Answers
Answer:
136000 J or 136 kJ
Explanation:
Formula
Heat = m * c * deltaH
Givens
m= 0.5 kg
c = 3400 J / (kg * oC)
Deltat = (100oC – 20oC)
deltat = 80oC
Solution
Heat = 0.5 kg * 3400 J/(kg* oC) * 80oC
Heat = 136000 Joules
Heat = 136 kg
Technically there is only 1 place of accuracy.
A student creates a hypothesis about their upcoming experiment. What must the
student do in their experiment with relationship to their hypothesis?
create a law based on the hypothesis
change the experiment to make the hypothesis correct
ignore the hypothesis
make observations to prove or disprove the hypothesis
Answers
Answer:
D. make observations to prove or disprove the hypothesis
Explanation:
what is the 3-dimensional orientation of a sublevel known as?
Answers
The 3-dimensional orientation of a sublevel is known as atomic orbital.
In quantum mechanics, Atomic orbitals are locations around an atom's nucleus where electrons are most likely to be at any particular time(specific orbits). These specific orbits exist in levels and can be broken down into sublevels.
Each sublevel has an orbital and it is oriented differently in 3-dimensional space.
The atomic orbital is a mathematical function that depicts how one or two electrons in an atom behave as seen in waves.
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will give brainlist to a person with correct answers for all (please help me)
1. Explain how is LiCl formed?
2. What is a combination/synthesis reaction
3. What is a decomposition reaction?
4. What is a single-replacement reaction?
5. What is a double-replacement reaction?
6. What are the trends in electronegativity within groups and across periods in the periodic table?
7. Which element has the lowest electronegativity value?
8. How does electronegativity determine the type of bond that atoms will form?
9. What type of bond will form between 2 atoms that have a large difference in electronegativity?
10. What type of bond will form between 2 atoms when the difference in electronegativity is 0.5?
11. Which element has the highest electronegativity value?
12. What does it mean that matter cannot be created nor destroyed in a Chemical reaction?
Answers
Answer:
1. LiCi is formed by the treatment of lithium carbonate with hydrochloric acid
2. A combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product).
3. Chemical decomposition, or chemical breakdown, is the process or effect of simplifying a single chemical entity into two or more fragments.
4. A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound
5. Double replacement reactions have two ionic compounds that are exchanging anions or cations.
6. The most electronegative elements are found on the top right of the periodic table.
7. cesium
8. Electronegativity describes the degree to which an atom attracts electrons in a chemical bond. But the electronegativity of two atoms would determine their bond type.
9. ionic bond
10. polar covalent bond
11. fluorine
12. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change.
Hope i was able to help!!!
What state is represented by the sign (s)
liquid
gas
solid
dissolved in water
Answers
solid.
liquid is (l)
gas is (g)
dissolved in water is (aq)
Not every earthquake has a(n) ______, but every earthquake has _____that occur in _____ the mainshock.
1.
Aftershock
Foreshock <------
2.
Aftershock <-------
Foreshock
3.
Places far away from
The Same place as <------
Am i right?
Answers
Not every earthquake has a(n) Foreshock, but every earthquake has an Aftershock that occurs in the Same place as the mainshock.
What is an earthquake?
An earthquake is defined as a natural disaster in which there are tectonic plates that are present on the earth's crust collides with each other.
An Earthquake can be minor as well as natural depending upon the frequency it causes the damage. Earthquake is the Shaking of Earth and was much destruction of the economy and manpower.
Surroundings are being disturbed like trees will fall, and buildings will collapse which will cause damage to the economy as well as to human life.
Foreshock is the before shop which happens before the earthquake and aftershock is the other socks that happen after the earthquake
Thus, the correct options are 1. Foreshock, 2. Aftershock, 3. The Same place as.
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I NEED HELP!!!! URGENTLY!!!! I HAVE TO GET THIS DONE THIS WEEK!!!! WILL GIVE BRAINLIEST!!!!
1. You learned that waves in the ocean, sound waves, and light waves all have certain things in common. They all carry energy. The velocity, frequency, and wavelength of each is connected by the same equation. Which type of wave would you most want to learn more about? Why does it interest you? What would you want to find out about it? Write your answers in 2-3 paragraphs. (10 points) Would you like to know more about how waves in the ocean move, how sound travels, or how light works?
2. If you could somehow travel inside an atom and look around, what part of the atom would you want to look at? Why? What would you want to understand better as a result of your "travels"? Write your answers in 2-3 paragraphs. (10 points) Do electrons or the nucleus interest you more? What questions do you still have about how an atom works?
Answers
Answer:
Explanation:
1) I personally would want to learn more about how the waves in the ocean move. About what causes high tide. What causes low tide. Why some waves are big and some small.
I know it has something to do with the gravitational pull of the moon. But that is as far as my knowledge extends on the subject. I have always been fascinated with the secrets of the ocean and the secrets of space. To me learning, this is a little of both.
2) The nature of the interaction between neutrons and protons in the atomic nucleus, which binds the nucleons together, is the biggest wonder in the inside of the atom that I would like to really know. Protons have a positive charge, but neutrons do not. What form of interaction between a charged particle and an uncharged particle is possible? That is what I expect to learn more about as a result of my explorations into the inner workings of the atom.
The inside of the atom is made up of the nucleus and electrons that travel about in orbits. The nucleus is made up of protons and neutrons. Electrons have a negative charge, protons have a positive charge, and neutrons have none. The nucleus is held together by electrostatic interaction between electrons and protons. The majority of the mass of an atom is made up of protons and neutrons.
I'm interested in finding out more about ocean waves travel. regarding the reason for high tide. what brings on a low tide. Although some waves become also large while others are smaller.
What are ocean waves?Ocean waves seem to be alterations to the ocean's surface. They could be produced by water being moved by the wind, gravity, as well as other forces.
What are waves?A disturbance that moves from one place to another across a medium has been referred to as a wave. As an illustration of a wave, think of a sinuous wave.
Personally, I'm interested in finding out more about ocean waves travel. regarding the reason for high tide. what brings on a low tide. Although some waves become also large while others are smaller I'm certain that the moon's gravitational force is somehow implicated. Because that is basically the extent of my expertise on the matter. The mysteries of the water and the mysteries of space have always interested me. I'm still learning, so this combines a bit of both.The largest enigma in the interior of the atom something I would really like to understand is the nature of the connection involving neutrons as well as protons in the nucleus of an atom, which holds the nucleons together. Neutrons just don't have a positive electrical charge, whereas protons do. What kind of interactions is conceivable between charged as well as uncharged particles. Through my investigations into the internal workings of the atom, I hope to understand more about it.
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What does a chemical equation show that a word equation does not
Answers
Answer: I do believe it shows variables.
Explanation:
How many protons, neutrons, and electrons are in an atom of beryllium with a mass number of 9?
A) 5 protons,5 electrons,4 neutrons
B) 4 protons,4 electrons,4 neutrons
C) 4 protons,4 electrons,9 neutrons
D) 4 protons,4 electrons,5 neutrons
Answers
Answer:
c / a
correct me if im wrong
Answer:
D) 4 protons, 4 electrons, 5 neutrons
how do the prefixes of the –saccharide words relate to the structure of the sugar?
Answers
Answer:
The prefixes tell you how many of each there are.
Explanation:
So for this example, mono would mean there is one sugar, di meaning 2 sugars and so on. Hope this helped!
Here is a table:
mono- 1 hexa-6
di-2 hepta- 7
tri- 3 octo- 8
tetra- 4 nona- 9
penta - 5 deca- 10
What is a control group?
A group that changes the variable
The group that applies the variable
The group that tests the variable
A test group where the variable is not changed or applied Which of the following objects is transforming electrical energy into energy of motion?
Answers
Answer:
The group that tests the variable.
Explanation:
The group that tests the variable is a control group.
Answer:
C when testing the group put the varible in control
Write the chemical formula for the following ionic compound nickel (III) sulfate 
Answers
Answer:
Nickel(III) Sulfate Ni2(SO4)3 Molecular Weight -- EndMemo.
Explanation:
this will explain everything
A high viscosity liquid will
Answers
Answer: high viscosity fluids move sluggishly and resist deformation.
Explanation: some examples of high viscosity liquids is Honey, syrup, motor oil, and other liquids that do not flow freely
Which of the following is not an ingredient for photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Light energy
D. Vinegar
Answers
Answer:
d
Explanation:
......................
Answer:
D. vinegar
Explanation:
Hope this helps you!!
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What is the difference between a conductor and an insulator?
Answers
Answer:materials that impede the free flow of electrons from atom to atom and molecule to molecule.
Answer:
conductores can flow easily through the electrical component while the insulators not
 Write the chemical compounds and names for the following ionic compounds. Magnesium and phosphorus 
Answers
Answer:
Magnesium is Mg.
Phosphorus is P.
how do i find the name of an element
Answers
Answer:
The periodic table will say it underneath the symbol.
Explanation:
I don't know how else to describe it but I hope this helps. :)
So 28 (NI) is nickle bc thats what is says on the bottom left
How many grams of water are needed to absorb 456 J if its temperature goes from 22.7 to 98.3 Celsius?
Answers
The mass of water needed to absorb 456 J is 1.44 g
We'll begin by calculating the change in the temperature of the water.
Initial temperature of water (T₁) = 22.7 °C
Final temperature (T₂) = 98.3 °C
Change in temperature (ΔT) =?ΔT = T₂ – T₁
ΔT = 98.3 – 22.7
ΔT = 75.6 °CFinally, we shall determine the mass of the waterHeat absorbed (Q) = 456 J
Change in temperature (ΔT) = 75.6 °C
Specific heat capacity of water (C) = 4.184 J/gºC
Mass of water (M) =?Q = MCΔT
456 = M × 4.184 × 75.6
456 = M × 316.3104
Divide both side by 316.3104
M = 456 / 316.3104
M = 1.44 gTherefore, the mass of the water is 1.44 g
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what are isotopes and explain why
Answers
Arrange the gases from most dense to least dense at a given temperature and pressure.
Most dense
Least dense
Answer Bank
Ar
Ne
CO2
H
C12
Answers
Answer:
Arrange them in order of greatest to least Molar Mass to get most dense to least dense at a given temperature and pressure.
Explanation:
"Given Temperature and Pressure" just tells you that those two variables are being held constant. The Ideal Gas Law (PV = nRT) shows that n (the # of moles) and V (the volume) are variable still. To keep pressure constant, we need to increase the volume so that the force per area is the same which would unfortunately lower the density. The only way for a gas to have the greatest density would be to have the least average kinetic energy to keep the pressure constant at a smaller volume. This is because kinetic energy is equal to KE = 1/2 m v^2, where m is mass in kilograms and v is the velocity. IT IS CRUCIAL TO NOTE THAT ACCORDING TO KINETIC MOLECULAR THEORY, ALL GASES HAVE THE SAME AVG. KINETIC ENERGY WHEN AT THE SAME TEMPERATURE. So since the avg. KE is also constant across these answers due to the temp. being constant, our only way to decrease the velocity (the rate at which the particles are moving per second) and in turn the number of collisions (to repeat, a smaller number of collisions is desired because they are equal to the pressure that must maintained at a constant value at the smallest volume possible to achieve highest density possible) is to increase the molar mass. This is also pretty intutive for the other part of the issue: since Density is a broken heart (m/v), a higher molar mass would ensure a smaller pressure (due to decreased velocity) and smaller volume (due to constant pressure). Okay, now order the gases heaviest to lightest in terms of molar mass and you got your answer. Please gimme brainliest if this helped bc it took 15 minutes to type out. Hope this helped you! :D
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The order of density is carbon dioxide>Neon >argon>carbon-12> hydrogen.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density of gas = Molar Mass of the gas ÷volume occupied by the given gases
Density is directly proportional to molar mass of the gases.
Molar mass of argon = 18g/mole
Molar mass of Neon = 20g/mole
Molar mass of carbon dioxide=44.01 g/mol
Molar mass of hydrogen=1g/mol
Molar mass of carbon-12=12g/mol
The order of gases from most dense to least dense at a given temperature and pressure is carbon dioxide>Neon >argon>carbon-12> hydrogen.
Therefore, the order of density is carbon dioxide>Neon >argon>carbon-12> hydrogen.
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How many moles are in 9.12 x 1023 molecules of sugar?
Answers
Answer:
1.514 moles
Explanation:
For this problem you want to use dimensional analysis and cancel out your molecules of sugar and be left with moles of sugar. We know that 1 mole (of anything) = 6.022 x 10 ^ 23 molecules, so we should use that conversion to help us. Start with 9.12 x 10 ^23 molecules and divide by 6.022 x 10 ^ 23 molecules, and you will be left with moles.
Hope this helps!
If you were a scientist investigating the effects of antioxidants in foods, what would you test and why?
Answers
Answer:
One possible reason why many studies on antioxidant supplements do not show a health benefit is because antioxidants tend to work best in combination with other nutrients, plant chemicals, and even other antioxidants.
Explanation:
The boiling points of different substances are given in the table below. Substance Boiling point (°C) Acetic acid 118. 1 Benzene 80. 2 Chloroform 61. 2 Water 100. 0 Which substance most likely has the strongest intermolecular forces? acetic acid benzene chloroform water.
Answers
The compound with the presence of higher inter-molecular forces has been Acetic acid. Thus, option A is correct.
The boiling point has been the temperature, at which the liquid has been started to convert to steam. The boiling has been mediated with the application of the energy to the substance for the breaking of the inter-molecular forces.
The higher the inter-molecular forces in the compound, the higher will be the boiling point of the compound. The higher concentration has also resulted in a higher boiling point.
In the following compounds, acetic acid has the highest boiling point of 118 degrees Celsius. Thus, it has been constituted of the higher inter-molecular forces. Hence, option A is correct.
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Write the chemical formulas and names for the following ionic compounds. Cobalt (III) and bromine
Answers
Answer:
CoBr2,CoBr2·6H2O,CoBr2·2H2O
Explanation:
Analyze the reaction of solid magnesium and water. Which pair of reactants and products in the table below represent the correct balanced equation for the reaction?
Answers
Answer:
monkey
Explanation:
cause that's what u r
EARTH SCIENCE: PLEASE HELP ME !!! Which tools do astronomers use to determine the effects of collisions between galaxies? Select the two correct answers.(1 point)
computer simulations
print encyclopedia entries
space telescopes
solar system models
Answers
In studying effects of collisions between galaxies, astronomers usually make use of space telescopes.
Astronomy deals with the study of outer space. The study focuses on planets and other celestial bodies. Generally telescopes are used to study outer space. The particular type of telescope that is used depends on the need.
In studying effects of collisions between galaxies, astronomers usually make use of space telescopes.
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Hello! Everyone:) I was just wondering if you can help me with my test.
Points: 99
Answers
Answer:
By their properties ;)
Explanation:
[tex]\Large \boxed{\sf by \ their \ properties}[/tex]
Every element has a set of particular characteristics. Each has a unique atomic and mass number because they contain a different ratio of protons and neutrons. The number of protons in an element mirrors the element's atomic number. The mass number equals the sum of the element's protons and neutrons.
According to increasing atomic numbers, chemical elements get organized. Periods and groups are the names of the horizontal rows and vertical columns, respectively. The chemical characteristics of elements within the same group are comparable due to their similar valency and number of outer electrons.
Chlorine has 7 valence electrons. Describe the type of bond that sodium would have
with chlorine. Write the chemical formula of the compound these two elements would form together. (i figured it out nvm)
Answers
Chemical formula:
Na + Cl —> NaCl
which of the following is a characteristic of the modern periodic table
Answers
PLEASE HELP WILL AMRK BRAINLIEST
what is the atomic mass of Na3PO4?
Answers
Answer:
163.94
Explanation:
Na = 22.99 (3)
P = 30.97
O = 16.00 (4)
22.99(3) + 30.97 +16.00(4) = 163.94
Hope that helps
I think.. sorry if I’m wrong! Have a nice day :)
