In a redox reaction, we can identify 2 kinds of half-reactions:
Oxidation: the oxidation number increases.Reduction: the oxidation number decreases.Let's consider the following half-reactions.
Al ⇒ Al³⁺This is an oxidation because the oxidation number increases from 0 to 3+. To balance it, we need 3 electrons on the right side.
Cu²⁺ ⇒ CuThis is a reduction because the oxidation number decreases from 2+ to 0. To balance it, we need 2 electrons on the right side.
2 F⁻ ⇒ F₂This is an oxidation because the oxidation number increases from -1 to 0. To balance it, we need 2 electrons on the right side.
Al ⇒ Al³⁺ is an oxidation and 3 electrons on the right side are needed.Cu²⁺ ⇒ Cu is a reduction and 2 electrons on the left side are needed.2 F⁻ ⇒ F₂ is an oxidation and 2 electrons on the right side are needed.Learn more: https://brainly.com/question/2671074
Identify whether each change represents an oxidation or reduction. then determine how many electrons were involved and which side of the reaction they should appear on in the half-reaction.
Al ⇒ Al³⁺
Cu²⁺ ⇒ Cu
2 F⁻ ⇒ F₂
What wavelength in nm does a photon with a frequency of 9.23 x 10^18 hz have?
Answer:
tyeh
Explanation:
4403 9324 7244 25886543322267
0.12 L of oxygen gas is collected over water at 30∘C with a total pressure of 392 torr. What is the partial pressure of the oxygen?
The partial pressure of the oxygen in the sample of oxygen gas collected over water is 360.2 torr.
According to Dalton's law of partial pressure, the total pressure of a mixture of gases is the sum of partial pressures of all the gases in the mixture. From Dalton's law;
PT = P1 + P2 + P3 + ..........
The partial pressure of water at 30∘C is 31.8 torr, Hence;
Total pressure = Partial pressure of oxygen + Vapor pressure of water
Total pressure = 392 torr
Partial pressure of oxygen = Total pressure - Vapor pressure of water
Partial pressure of oxygen = 392 torr - 31.8 torr = 360.2 torr
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Imagine that you wanted to test whether the stone in your ring is a diamond or cubic zirconium. Which properties could you use to test it? Are there any properties you would not use?
Answer:
ahahahah
Explanation:
Science answer all questions for 30 points
Answer:
scam it says 15 points
Explanation:
2. Which of the following is an example of "chiming in"?
taking shorter showers
picking up trash
buying snacks in bulk rather than in individually wrapped packages
encouraging friends and family to cut back on their use of natural resources
Answer:
encouraging friends and family to cut back on their use of natural resources
Explanation:
I absoulutly know this is the correct answer.
10. What do you have to do to the coefficients of equation I below to get to equation II?
i. 2 SnO2 + 4 H2 2 Sn + 4 H2O
ii. SnO2 + 2 H2 Sn + 2 H2O
a) Both equation I and II are balanced, but equation I is the correct way to write the balanced equation.
b) Can you divide equation II by another factor and still have it be correct? Why or why not?
c) In a complete sentence, write down a method you could use to determine if an equation is written in the correct way.
1. We have to divide the coefficient of equation I by 2 to get equation II.
a. Both equations are balanced but equation II is the correct way to write a
balance equation.
b. It will be correct if we divide equation II coefficient by another factor
but we will get fractions as coefficient. For example
[tex]\frac{1}{2}[/tex]SnO₂ + H₂→ [tex]\frac{1}{2}[/tex]Sn + H₂O
c. The correct method is checking if the number of moles of element on
the reactant side is same as the those on the product side. And the
conventional way is making sure the coefficients are whole numbers.
i. 2SnO₂ + 4H₂ → 2 Sn + 4H₂O
ii. SnO₂ + 2H₂→ Sn + 2H₂O
We have to divide the coefficient of equation I by 2 to get equation II.
Both equations are balanced but equation II is the correct way to write a
balance equation.
If we divide the coefficients of equation II by another number, we will not
get a whole number coefficients. The coefficient will be fractions , it will
be correct but its not conventional.
The best method to know if equation is written the correct way is checking
if the coefficient are in the lowest whole number factors.
we also have to check if each moles of elements found in the reactant is
the same in the product side.
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Answer:We have to divide the coefficient of equation I by 2 to get equation II.
Explanation:
Rice is a promoter of a corporation to be known as Dex Corp. On January 1, 1985, Rice signed a nine-month contract with Roe, a CPA, which provided that Roe would perform certain accounting services for Dex. Rice did not disclose to Roe that Dex had not been formed. Prior to the incorporation of Dex on February 1, 1985, Roe rendered accounting services pursuant to the contract. After rendering accounting services for an additional period of six months pursuant to the contract, Roe was discharged without cause by the board of directors of Dex. In the absence of any agreements to the contrary, who will be liable to Roe for breach of contract?
Answer:
may have liability on the contracts he negotiates on behalf of the prospective corporation
Explanation:
Write the chemical formulas for carbon dioxide, water, and oxygen.
Answer:
Carbon Dioxide: CO2
Water: H2O
Oxygen: O2
how is using safety equiptment important
Answer:
You protect yourself and others from numerous injuries. Such safety equipment would be goggles, tongs, gloves(sometimes), hair pulled back, sleeves rolled up, etc.
Explanation:
a 10 kg box sits on the floor. approximately how high would you have to lift the box to increase gravitational potentail energy by 350j
Answer:
3.5 meters
Explanation:
How do we determine the number of neutrons
Would Lithium and Fluoride still be neutral?
explain in 2-3 sentences
Answer:
LiF (lithium fluoride)
Explanation:
Lithium ions have a charge of +1 and fluoride ions have a charge of -1. The formula unit for lithium fluoride is LiF, which means that the lithium and fluoride ions are present in a 1:1 ratio. So the positive and negative charges cancel each other, and the compound lithium fluoride is neutral.
If youve visited dallas, then youve been to texas
I'm sorry but cant understand if this is a problem or not
Answer:
Yes
Explanation:
Because Dallas is part of Texas
A 40 kg girl is pushing a 40 kg boy in a 20 kg toy wagon. The wagon is moving at a constant speed of 2.0 m/s. Calculate the combined kinetic energy of the boy and the wagon *
:A 40kg girl is pushing a 40kg boy in a 20kg toy wagon....the wagon is moving at a constant speed of 2.0m/s. Calculate the combined kinetic energy of the boy and wagon.
answer:120J
hope this helped
Which nonmetal is extremely reactive?
Answer:
element fluorine
Explanation:
__________________________
Answer:
The most extremely reactive nonmetal is the halogen fluorine.
Explanation:
Halogens are the most reactive nonmetals on the periodic table, but fluorine is by far the most dangerous and reactive because of its high electron affinity. It also considered the most dangerous as it bonds with many elements and acts exposively.
What are the differences between acetic acid and ethanoic acid?
Answer:
that acetic acid is the common name, whereas ethanoic acid is the chemical name given by IUPAC for the same compound.
Question 1 (1 point)
Which object has a net force of zero acting on it?
Question 1 options:
a football flying through the air
a cat running after a mouse
a flowerpot sitting on a table
a speeding car
Question 2 (1 point)
Which object has unbalanced forces acting on it?
Question 2 options:
a sweater sitting on a store shelf
a letter sitting in a mailbox
a fence around a garden
a leaf falling to the ground
Question 3 (1 point)
What happens to the motion of an object when the forces acting on it are balanced?
Question 3 options:
The object changes direction.
The object's motion does NOT change.
The object slows down.
The object speeds up.
Question 4 (1 point)
When unbalanced forces act on an object that is in motion, the object can:
Question 4 options:
change speed, direction, or both.
only slow down.
only change direction.
only speed up.
Question 5 (1 point)
TRUE or FALSE: a balanced forces is one in which the net force is zero.
Question 5 options:
True
False
Please help! Ill give 20 points!!
* I hope this helps you with your quiz!.Please check the explanations for further understanding. (I recommend reading them in order.) Have a whimsical week!
Answers:
1. a flowerpot sitting on a table
2. a leaf falling to the ground
3. The object's motion does NOT change.
4. change speed, direction, or both.
5. True
Explanations:
1. Net force is the sum of the forces acting upon an object. Often, this will be shown through diagrams with arrows pointing in certain directions and a certain amount of Newtons. A net force of zero means that the object is steady and stable in its motion (whether moving or staying still). With zero net force, an object will not change its speed nor direction. A football in the air is not the answer as gravity pulls it back down towards Earth, creating a change in both speed and direction. A cat running after a mouse is likely not the answer as well. Realistically, the cat and mouse will not continue at a constant speed in the exact same direction forever. Thus, a cat running after a mouse does not make sense. A flowerpot sitting on a table is not moving at all. It is not changing speed or direction; therefore, it does have a net force of zero. A speeding car is, well, speeding. Its speed is changing, just as the answer claims. Since a flowerpot sitting on a table is the only answer choice that has a net force of zero, it is the answer.
2. Unbalanced forces are unequal forces acting on one another from/in different directions. Unbalanced forces must be moving in some way. If they are not, then the forces are equal and balanced instead. They have to be changing direction and/or changing speed. A sweater sitting on a store shelf does not move at all; it never changes direction nor speed. It is an example of balanced, not unbalanced, forces. A letter sitting in a mailbox is just like the sweater - it doesn't change speed or direction, so it can't be an unbalanced force. A fence around a garden is planted firmly into the ground, thus unable to move in the first place. With no change, it is a balanced force, rather than an unbalanced one. A leaf falling to the ground is, according to the wording of the answer choice, currently falling. Gravity is acting upon it and pulling it towards the ground. Since the leaf falling is in motion, or moving, there are unbalanced forces acting on it (specifically gravity pulling the leaf down). Therefore, the falling leaf is an instance of unbalanced forces.
3. Balanced forces are the opposite of unbalanced ones - they are equivalent forces that act in opposite directions in order to contradict/cancel each other. Since balanced forces are, well, balanced, neither one will overpower the other. No chance will occur as long as the forces remain balanced (ones). This lines up directly with Isaac Newton's first law of motion, which states that an object will continue to be at rest, or continue in a constant speed and direction, unless acting on by an external force. The external force will unbalance the forces, thus causing a change in speed and/or direction. Therefore, since balanced forces are forces that will not change speed nor direction, the answer should be that the object's motion does not change.
4. As stated earlier, unbalanced forces act in different directions with different amounts of power/Newtons. One must be/is more powerful than than rest; this is so that the unbalanced forces can be, you know, unbalanced. Unbalanced forces can cause a change in speed and a change in direction (it can be both or only one). Thanks to this information, we can conclude that the answer to this question is to change speed, direction, or both.
5. Balanced forces and a net force of zero are both included in the first law of motion. Both of these forces will continue at a consistent speed and direction until acted upon by another force. Since both of these terms have the same definition, it is reasonable to say that they are synonyms (which they are). Balanced forces and zero net force mean the same thing (and are the same thing). So, it is true that balanced forces is when the net force is zero.
The object has a net force of zero acting on it is a flowerpot sitting on a table. A leaf falling to the ground has unbalanced forces acting on it.The object's motion does not change when the forces acting on it are balanced.When unbalanced forces act on an object that is in motion, the object can change speed, direction, or both.The statement a balanced forces is one in which the net force is zero is true.
What is a force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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lodine (1) , What are the correct number of valance electrons
Answer: Iodine,
, is located in period 5, group 17 of the periodic table, and has an atomic number equal to
53
.
plss brainleist
Explanation:
help Asap for Brainlist
Answer:
the third option
Hope this helps
if the mixture is 130.0 grams what is the mass of the water
1. 30.0 g
2. 70.0 g
3. 100.0 g
4. 160.0 g
Answer: 160.0g
Explanation:
130g < 160g
a metal with a mass of 1.00 kg occupies a volume of 370cm3. calculate the density of the metal.
Answer:
370 cm^3
Explanation:
Here, Density= Mass / Volume
=1.00/370
=370 cm^3.
The density of the metal is approximately 2.70 kg/dm³.
Density (ρ) is calculated by dividing the mass (m) of an object by its volume (V): ρ = m/V.
Given:
Mass (m) = 1.00 kg
Volume (V) = 370 cm³ = 0.370 dm³
Density (ρ) = 1.00 kg / 0.370 dm³ ≈ 2.70 kg/dm³
The density of the metal is approximately 2.70 kg/dm³.
Density is a measure of how much mass is contained within a given volume. In this case, a metal with a mass of 1.00 kg occupies a volume of 370 cm³.
By dividing the mass by the volume, the density is calculated. The resulting value of 2.70 kg/dm³ indicates that for every cubic decimeter (dm³) of volume, the metal has a mass of 2.70 kg.
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Find the formula or molar mass of the following molecules:
CO2
2.
Al2O3
3.
CH10O5
4.
ZnCl2
5,
H2SO4
6.
H20
7.
КСІ
8.
C12H22011
9.
CaCO3
10. AgNO3
Please help I’m so confused
Answer:
I think its 3.0M
Explanation:
Answer:
3.0M
Explanation:
We don't have n yet, so we need to use n =m/M to find it out
n = 30g/101.1032 g/mol
n = 0.2967265131mol
M = n/V
100mL = 0.1L
M = 0.2967265131mol/0.1L
M = 2.96726mol/L
Rounded to 3.0M
Why does the total mechanical energy stay the same as kinetic and potential energy change?
Answer:
They are the same because the potential and kinetic energy is added, they equal the same as the mechanical.
Explanation:
whats white sticky and best not to swallow?
Answer:
Bro its expired milk duh
Explanation:
what is the definition of naturalization?
Answer: The biology or linguistic term?
Explanation: The introduction of a plant or animal to a region where it is not indigenous.
Work file: climate and weather; what’s the difference
teacher isn’t giving us much recourses so I thought I’d ask for help here, thank you
Answer: Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time. Climate change refers to long-term changes.
Which type of science is the study of living things and living systems?
A. Life science
B. Physical science
C. Earth science
D. Space science
The Answer is option A. Life science
hope it helps :)
I need help with this
Answer:
2) 100
3) 1000
4) 10
5)100
6)1000
7)100
8)10
9)10
10)100
11)10
12)10
13)1
14)1
15)1
WILL MARK BRAINLIST IF RIGHT
What coefficient should be used for oxygen gas to correctly balance this equation
Answer:
4FeS +3O2-2Fe2O3+4SO2
