Answer:
Explained below
Explanation:
Fossil fuels which are made up of coal and oil when burnt by power-production industries, make sulfur to be released into the atmosphere where it combines with oxygen to form SO2 (sulfur Dioxide). Now, the exhausts possessed by cars could also cause the formation of nitrogen oxides in the atmosphere. Therefore, H2SO4 which is airborne sulfuric acid and HNO3 which is nitric acid can be formed and when dissolved in the water vapor in the atmosphere form what is called acid rain.
Now, as acid rain flows through the soil, it can leach aluminum from the soil clay particles and then flow into the lakes to make them more acidic.
Which of these factors is involved in earthquake formation?
A. plates getting larger
B. rocks breaking
C. stress that decreases
D. faults that remain stationary
Answer:
B
Explanation:
Edge 2023
Select the correct answer.
How many electrons does a covalent bond consist of?
A.
one
B.
two
C.
four
D.
eight
Explanation:
A covalent bond can be thought of as a 'shared pair' of electrons, so there are 2 electrons in each bond. That means that a double bond will have 4 electrons in the space between the bonded nuclei, and a triple bond will have 6.
MARK ME AS BRAINLISTit is also called solution
Explanation:
In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. ... The term "aqueous solution" is used when one of the solvents is water.
How many grams of nitric acid, HNO3, are required to neutralize (completely react with) 4.30 g of Ca(OH)2?
Answer:
8.25 g HNO3 (please correct me if I'm wrong!)
The correct answer is 7.31 g HNO₃.
What is nitric acid used for?Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.
Please check the attached file for an explanation.
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I'm having trouble balancing these. Can you help me
Answer:
Oh Okay
I hope u have a better rest of ur day
What is the empirical formula of a compound that contains 28% iron, 24% sulfur, and 48% oxygen by mass?
Answer:
Fe2S3O12 would be the closest Answer
Explanation:
What is the slope of the line?
1. What is solar energy? Give an example
Answer:
Solar energy is energy from the sun. for example solar panels are used to use energy for the sun to give you eletricity.
Explanation:
Explanation:
solar energy is energy from the sun, it can be used for electricity.
Which is element number 10?
Please Help!!
Answer:
Neon is a chemical element with the symbol Ne and atomic number 10. It is a noble gas.
Answer:
Neon is the element which is in serial number 10 in the periodic table.
Neon is one of the noble gases, i.e., they are stable (talking about NOBLE GASES)
explain why it is more difficult to produce drinking water from waste water than from water in lakes
Answer:
Drinking water can be produced from waste water and from lakes but the difference is in the difficulty of producing water which we can consume.
Drinking water should be clean and toxic free so that if does not affect the human body. Waste water carry more toxic matter in comparison to lake water that's why, producing drinking water from waste water takes more time, expensive and difficult.
So, producing drinking water from waste water is more difficult as it require the removal of more toxic matter than water in lakes.
what is the percent of just the oreo(out of 100%) from the total mass of these 3 cookies combined
Answer:
Percent mass of oreo = 35.11%
Explanation:
Given:
Mass of oreo = 17.1
Mass of 1st cookie = 16.2
Mass of 3rd cookie = 15.4
Find:
Percent mass of oreo
Computation:
Total mass = Mass of oreo + Mass of 1st cookie + Mass of 3rd cookie
Total mass = 17.1 + 16.2 + 15.4
Total mass = 48.7
Percent mass of oreo = [Mass of oreo/Total mass]100
Percent mass of oreo = [17.1 / 48.7]100
Percent mass of oreo = 35.11%
Select the correct answer.
Which two particles can form an ionic bond with each other?
A.
a negative oxygen ion and a negative chlorine ion
B.
a positive sodium ion and a positive magnesium ion
C.
a positive calcium ion and a negative oxygen ion
D.
a neutral fluorine atom and a negative sulfur ion
Answer:
C. a positive calcium ion and a negative oxygen ion
Explanation:
Ionic bonds are generally positive and negative because one is gaining electrons while the other is losing.
The term chemical bond generally refers to the attractive force that holds the constituent atoms or ions of a molecular species together. Here an ionic bond is formed between a positive calcium ion and a negative oxygen ion. The correct option is C.
What is an ionic compound?An ionic compound is formed by the transfer of one or more electrons between the atoms. An ionic bond or electrovalent bond refers to the strong electrostatic forces of attraction that hold together oppositely charged ions.
The number of electrons lost or gained by an atom of an element so as to acquire a stable octet configuration in its outermost shell is called the electrovalency of the element.
Here 'Ca' has 20 valence electrons and 'O' has 6 valence electrons. So in order to attain the stable octet configuration of 'Ar', 'Ca' loses two electrons whereas 'O' accepts two electrons to attain stable octet configuration of 'Ne'.
Thus the correct option is C.
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PLS ANSWER I WILL GIVE BRAINLY TO First!!!
Answer:
if I tell the ans u won't give me brainly
PLZ HELP SCHOOL STARTS TMR AND I NEED THIS DONE BY 2NIGHT. ILL GIVE BRAINLIEST
Answer:
Filtration separates solids of different sizes.
Distillation takes advantage of differences in boiling points.
Evaporation removes a liquid from a solution to leave a solid material.
I really need help I'm not good with science
Answer:
A!!!!!!!!
Explanation:
In what situation does water undergo a physical change?
Answer:
There are actually two.
Explanation:
When water freezes it turns to ice however it still has the molecular properties of water. Same thing when it evaporates.
2Mg + O2 → 2Mgo
What is the greatest amount of MgO (in moles) that can be made with 7.8 moles of Mg and 4.7
moles of O,? Which is the limiting reactant? Which reactant is in excess, and how many moles
of it are left over?
Answer:
it would be 4.5 mole left over
Explanation:
The greatest amount of MgO will be 7.8 mole and Mg will be limiting reagent.
What is limiting reagent?The substance that would be entirely absorbed in the end of the chemical process is called as the limiting reagent.
What is mole?A mole would be defined as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the particular chemical elementary entities.
Calculation of amount of MgO
The balanced chemical equation is 2 Mg + [tex]O_{2}[/tex] → 2MgO
It can be seen that 2 mole of Mg reacts with 1 mole of oxygen.
So, 7.8 mole of Mg = 7.8 / 2 = 3.9 mole of [tex]O_{2}[/tex].
Since, [tex]O_{2}[/tex] will be added in given reaction vessel will be 4.7 moles.
So, (4.7 - 3.9) = 0.8 moles of [tex]O_{2}[/tex] left but in this case Mg will be finished. Therefore, Mg will be limiting reagent.
It can be understood that 2 moles of Mg will give 2 mole of MgO.
That's why , 7.8 moles of Mg = 2 × 7.8 / 2 = 7.8 moles of MgO.
Therefore, 7.8 mole of magnesium oxide (MgO) could be generated and Mg will be limiting reagent.
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HELP ASAP!!!!!!!
Nieko purchases a box of granola cereal that has a mass of 0.312 kg. When he gets
home, he sorts the cereal into groups: oats, raisins, and nuts. Next, he measures the
mass of each group. What will Nieko find when he adds together the mass of each
group?
Answer:
girlll we got da same question we need help
Nieko purchases a box of granola cereal that has a mass of 0.312 kg, then according to law of conservation of mass, the mass of each group is 0.312 kg.
What is law of conservation of mass?According to law of conservation of mass the mass in isolated system can neither be created nor destroyed by chemical reaction and physical transformation but it transfer from one form to another.
When wood burn the mass of soot, gases and ashes is equal to the original mass of charcoal and the oxygen when it first created is one of the best example of law of conservation of mass.
Thus, Nieko purchases a box of granola cereal that has a mass of 0.312 kg, then according to law of conservation of mass, the mass of each group is 0.312 kg.
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I really need help on this question! Thank you so much!
Answer:
A. Empirical formula => C₂H₄O
B. Molecular formula => C₄H₈O₂
Explanation:
From the question given above, the following data were obtained:
Mass of C = 0.273 g
Mass of H = 0.046 g
Mass of O = 0.182 g
Molar mass of compound = 88 g/mol
A. Determination of the empirical formula of the compound.
C = 0.273 g
H = 0.046 g
O = 0.182 g
Divide by their molar mass
C = 0.273 /12 = 0.023
H = 0.046 /1 = 0.046
O = 0.182 /16 = 0.011
Divide by the smallest
C = 0.023 / 0.011 = 2
H = 0.046 / 0.011 = 4
O = 0.011 / 0.011 = 1
Thus, the empirical formula of the compound is C₂H₄O
B. Determination of the molecular formula of the compound.
Empirical formula = C₂H₄O
Molar mass of compound = 88 g/mol
Molecular formula =?
Molecular formula = [C₂H₄O]ₙ
[C₂H₄O]ₙ = 88
[(12×2) + (4×1) + 16]n = 88
[24 + 4 + 16]n = 88
44n = 88
Divide both side by 44
n = 88 / 44
n = 2
Molecular formula = [C₂H₄O]ₙ
Molecular formula = [C₂H₄O]₂
Molecular formula = C₄H₈O₂
Without the atmosphere, life on Earth would not be possible. Which of the following is NOT an explanation for how Earth’s atmosphere protects life on the planet?
A. It allows visible light to pass through completely.
B. It contains gases that filter out ultraviolet radiation.
C. It keeps Earth warm by trapping in heat.
D. It protects life from ultraviolet rays of light
Answer:
B
Explanation:
IM A CHEMISTRY WIZZZZ
:)
I hope u get full marks on your paper/test/quiz or whatever!
There is a 20 percent chance so stay positive!
Answer:
D
Explanation: ultraviolet rays are harmful to humans
What is the rate of acceleration caused by gravity?
Answer:
The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
what is the conclusion that males are stronger than females
A property is a characteristic that can be used to identify a substance. Properties can be ______ or _______.
Answer:
a list of characteristics that can be used to identify a substance include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Answer:
physical or chemical
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance while a chemical property describes the ability of a substance to undergo a specific chemical change.
Explain how Newton's idea about inertia has helped in astronomy?
o We can learn that objects in space like asteroid will keep its path unless a different force is applied to it
The Law of Inertia will help us discover distant galaxies
Inertia is used to help identify distance planets.
o We can figure out the size of far away planet through the Law of Inertia.
NEXT QUESTION
ASK FOR HELP
Answer:
the answer is A because when something is going straight it wont change unless its acted upon by a force
Explanation:
Balance the following chemical equation:
i need F
Answer:
L2 add a for NAL add a 2 then for the first NA2 put a 4 and then the second NA2 put a 2 and it should be good
Explanation:
What chemicals must be cycled through a Martian environment in order for the planet to be habitable for life? Describe how scientists intend to make those resources available in such a harsh environment.
two difference between simple cell and dry cell
Explanation:
Simple cell has liquid chemicals and it is difficult to carry from one place to another. Dry cell has no solution. So, it is easier to carry it from one place to another and there is no risk of spilling acid from the dry cell.
What is the sum of kinetic energy and potential energy?
Answer:
Potential energy is stored energy. An object has a measurable amount of potential energy depending on where it’s located and how it relates to other objects around it — the energy of position.[1]
An apple on the floor has very little potential energy. Lift it to the top of a skyscraper, and suddenly it has a lot of potential energy. It can fall to the ground under the force of gravity. It can also interact with other objects on its descent, such as striking a flying bird or landing on a car roof and damaging it.
When the apple is descending, its potential energy has become kinetic energy, which is the energy of motion. Kinetic energy is the energy a person or an object has due to its motion — in this example, the falling apple. A parked bike on top of a hill has potential energy, which becomes kinetic energy once you start riding it downhill.
Both of these energies are measured in joules. Energy is never destroyed or lost when changing from potential energy to kinetic energy — it is merely transformed from one energy type to another. This is known as the law of conservation of energy.[2]
The potential energy of an object cannot be transferred to another entity – you cannot suck the potential energy out of the apple atop a skyscraper. Kinetic energy is transferable, as witnessed with the falling apple’s kinetic energy damaging a car or hitting a bird.
What Is the Relationship Between Potential and Kinetic Energy?
Relationship Potential and Kinetic Energy explained | Waterfall energy image
The relationship between potential energy and kinetic energy is that potential energy can transform into kinetic energy.
Potential energy is position relative. In other words, it changes depending on an object’s height or distance and the mass of the object. Kinetic energy changes depending on an object’s speed and its mass.
If we think about a waterfall, some still water at the top of the waterfall has potential energy. It isn’t moving and hasn’t gone over the edge. The water flowing from the waterfall has kinetic energy as it flows.[3]
A pendulum is an excellent example of this relationship. As the pendulum swings ever higher upwards, its potential energy increases until it reaches its optimum at the highest point of the swing. At the top of the arc, the potential energy turns into kinetic energy as it swings back down.[4]
What Are Examples of Potential Energy?
There are two primary types of potential energy: gravitational potential energy and elastic potential energy.
The gravitational force of the Earth causes gravitational potential energy. When a person jumps from a high dive board, they land with much force (and a splash) into the swimming pool below.
The Earth’s gravity uses the diver’s gravitational force (their weight) to produce the kinetic energy (movement) that brings the diver into the pool. At the top of the diving board, we can talk about the diver’s gravitational potential energy.
This is the same for apples on trees, bikes on top of a hill, a roller coaster waiting to descend, and a skydiver in a plane — all examples of the potential to do an amount of work.[5]
Elastic potential energy occurs when you stretch or compress something. A rubber band left on a sideboard has little potential energy. If you pick it up and stretch it, you have increased its potential to do some work.
If you release the rubber band, it may fly across the room or scare the cat. You manipulated the rubber band to increase its potential energy, which was then released as kinetic energy as it traveled (motion) across the room. An archer pulling back a bow and coiling a spring are further examples of potential energy.[6]
Write a net ionic equation for the neutralization reaction of acid with a hydroxide base. (Include phase symbols)
Answer:
salt + water. It is called the ionic equation for neutralisation. the acid to form a salt solution.
Explanation:
So what you end up with is you always end up H+ plus OH- yields H2O, because HCl, and NaOH, since they're strong, they fully dissociate. So the Na+, and the Cl - are spectator ions. So with a strong acid and strong base, the net ion equation is always H+ plus OH- yields H2O.
4 Al + 3 O2 -> 2 Al2O3 How much aluminum would be needed to completely react with 45 grams of Oz?
Answer:
50.6g Al would be needed
Explanation:
Based on the reaction:
4Al + 3O₂ → 2Al₂O₃
4 moles of aluminium react with 3 moles of oxygen to produce 2 moles of Al₂O₃
To solve this question we need to find the moles of 45g of O₂. Then using the chemical equation find the moles of Al and its mass:
Moles O₂ -Molar mass: 32g/mol-:
45g O₂ * (1mol / 32g) = 1.41 moles O₂
Moles Al:
1.41 moles O₂ * (4mol Al / 3mol O₂) = 1.875 moles Al
Mass Al -Molar mass: 26.98g/mol-:
1.875 moles Al * (26.98g / mol) =
50.6g Al would be needed
The amount of aluminum that would be required to completely react with 45 grams of O2 would be 50.59 grams.
From the balanced equation of the reaction:
[tex]4 Al + 3 O_2 ---> 2 Al_2O_3[/tex]
The mole ratio of Al to O2 is 4:3.
Mole of 45 grams of O2 = mass/molar mass
= 45/32
= 1.4063 moles
Equivalent mole of Al: 4 x 1.4063/3
= 1.875 moles
mass of Al = mole x molar mass
= 1.875 x 26.98
= 50.59 grams
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