Chemistry High School

Consider the equation:

Ca+O2→CaO

What needs to be done in order to balance the equation?


Place a 2 in front of the Ca and the CaO.

Place a 2 in front of the O2 and the CaO.

Place a 2 in front of the CaO only.

Place a 2 only in front of the Ca.

Answers

Answer 1
the first one would be the best answer

Related Questions

Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol?

Answers

Hey you got a picture you can call the number one phone call you got it and send

How much eat is absorbed when 50.0g of water changes from 25.0 Celsius to 37.0 Celsius?

Answers

27 I think beacuse if you subtract
4.186 j/g. X 50g x (37-25) =
2,511 joules or 2.5 kilo joules
Or 2.38 btu


4.186 is specific heat of water per gram per deg C at sea level
Times mass of 50 grams
Times delta T of the water


2530 joules when cross checked by plugging into an online calculator

The element magnesium is a
O Group 12, Transition Metal
O Period 3, Alkaline Earth Metal
Period 4. Alkali Metal
O Period 4, Halogen

Answers

Group 2
Period 3
Alkaline Earth Metal

Explain why the Earth has four different seasons​

Answers

Answer:

Earths rotation

Explanation:

Answer:

because if there was not four diferent season we would not have a day or a night because we would not be moving

Explanation:

Describe how sodium (Na) and chlorine (Cl) interact to form an ionic compound. Specifically, what is happening to an electron?

Answers

When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable. The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.
Here you go its agin me answering you

This is a science question.

What is the acceleration of this helicopter?

Answers

Answer:

7m/s

Explanation:

Is the acceleration of the helicopter

Examine the layers of rock. How does layering provide evidence for determining geologic age?

Answers

Well I can’t see the rocks but, to determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones.



Hope this helped! <3

Answer:

the deeper you go down in to the rock the older the fossils get.

Explanation:

layering can provide evidence because the deeper you go down in to the rock the older the fossils get. So when the scientists go in to the rock they can say what animals lived in that time and what animal was the oldest.

A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?

A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.​

Answers

Your answer is B Particle motion is coming to a complete stop.That's your answer!

Hope this helps!!!

Answer:

B

Explanation:

i have the same test

Clinical thermomerter​

Answers

Answer:

Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.

a small medical thermometer with a short but finely calibrated range, for taking a person's temperature.

which statement is a scientific law

Answers

Answer:

It is b

Explanation:

What effect does the spinning of the earth's core have?
A.it creates gravity
B. it creates matter
C. it creates mass
D. it creates the earths magnetic field.

Answers

Answer:

c

Explanation:

its c

Earth contains a spinning electric filed. The spinning of earth core creates its magnetic field. Thus, option D is correct.

What is a spinning body?

A body which rotates in its own axis is called a spinning body. Earth rotates about its along with revolving around sun.  The outer core of earth generates electric current. This is called telluric current.

Flow of this current creates an electric current which is parallels to the surface of earth. The direction of magnetic field lines will be perpendicular to the direction of current. But it comes stronger when parallel to current.

A rotating electric current results in the generation of a magnetic field. Thus spinning of  earth core generates a magnetic field and therefore, option D is correct.

To learn more about magnetic field, refer the link below:

https://brainly.com/question/11514007

#SPJ2

What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and neutrons

Answers

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Answer: I'm pretty sure the answer is Number of Protons

Explanation:

I took the k-12 test

Which type of bond is salt? a. covalent b. valence c. metallic d. ionic

Answers

Answer:

D. Ionic

Explanation:

It has ionic bonding! Good luck ^^

plsssssssssssssssssssssssssssssssssssssssss help me

Answers

Answer:

C

Explanation:

A year is a complete revolution around the Earth

Which of the following is a subsurface event that takes place during the rock cycle?

Group of answer choices

Cementing

Erosion

Melting

Weathering

Answers

Answer:

Melting

Explanation:

Could not have been erosion because erosion happens on the surface.

Could not have been weathering because weathering happens on the surface.

So we only have Cementing and Melting left....

The answer is melting, I got 100% on my test.

Hope this helps!!!! :D

Please give brainliest!!!

Answer:

D

Explanation:

In the rock cycle, surface events takes place at the surface of earth. Thus,

weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.

Etiquetas de productos de casa formula química, nombre de la formula, y el nombre del producto. Ejemplo NaCL, Cloruro de sodio, sal.

Answers

Answer:

Azucar, bicarbonato de sodio, lavandina, vinagre, amoniaco.

Explanation:

Podemos numerar estos compuestos

Azucar → Sacarosa → C₁₂H₂₂O₁₁

Lavandina → Hipoclorito de sodio → NaClO

Vinagre → Ácido acético → CH₃COOH

Bicarbonato de sodio → NaHCO₃

Amoníaco → NH₃

The first noble gas with a Lewis Structure with 8 dots is

A. Ar
B. Kr
C. He
D. ne

Answers

Answer:

C) He

Explanation:

Helium is one of the noble gases and contains a full valence shell. Unlike the other noble gases in Group 8, Helium only contains two valence electrons.

Other Questions
Gym Ratsby c.safosStage Set: Late in the evening in the Hammer House Boxing Gym, most of the regulars have left. A scattered few people still remain. In the background, a man uses a jump rope. A woman does push-ups. (CAIN, a small boxer, sits on a bench unwrapping the protective tape off of his knuckles and wrists using his teeth. SERGIO, his sparring partner and best friend, cuts away at the tape on CAIN'S other hand.)SERGIO: I know you've got a hand in there somewhere.CAIN: (spitting the tape out of his mouth) Well, remember to stop cutting once you see bone. (The people exercising in the background finish their workouts and move off stage, leaving the focus of the audience on CAIN and SERGIO.)SERGIO: Right, like you'd be able to feel it otherwise. I don't even think you have bone in there. I think you've got anvils in your hands.CAIN: Are you kidding? I'll need more than anvils come fight night. Doerkson is a monster in the ring. To bring him down, I'll need a lead pipe and a tank if you can spare them. (Freed from the cast of protective tape, CAIN'S hands start to violently shake. CAIN closes them into a fist until they calm.)SERGIO: What was that? (CAIN stands up and walks over to a nearby heavy bag and starts to throw light jabs.)CAIN: It's nothing, just nerves. It'll calm down after the fight.SERGIO: Have you seen a doctor? (CAIN'S light jabs get heavier.)CAIN: Seriously, I'm fine. Just nerves.SERGIO: You don't get nerves. You don't get worried or stressed. I know you. What's going on? (CAIN'S heavy jabs get heavier as the heavy bag begins to sway.)CAIN: I'm fine. Let it go.SERGIO: You can't stonewall me. We're going to a doctor tonight. I don't want to see you end up like Motts, stumbling around, shaking, can't even hold a spoon to eat, let alone throw hands. He took too many punches to the head, and now, his head is like a snow globejust little flakes floating around in there. As a matter of fact. . . . (CAIN begins to pummel at the heavy bag, and the bag begins to rock violently.)CAIN: Let it go! I'm not going to any doctors now. If I do, the athletic commission steps in. If they step in, they'll cancel the fight. They do that and I'm out of a purse. I need that money! And if you call yourself my friend, you'll keep quiet. (SERGIO walks over and stops the swaying bag.)SERGIO: It's your funeral. (SERGIO walks away to the locker room. CAIN'S hands start to shake again until CAIN closes them into fists. The tremors stop.)What is the best way to describe this drama? A. a soliloquy B. a monologue C. a tragedy D. a comedy pleaseeee hurryyy i needd helpppHow many solutions are there for this equation? Why?2(m+2)=126mSelect the option that correctly answers both questions.a. There is one solution, because the coefficients of the variables on both sides of the equation are the same.b. There are no solutions, because the coefficients of the variables on both sides of the equation are different.c .There is one solution, because the coefficients of the variables on both sides of the equation are different.d. There are no solutions, because the coefficients of the variables on both sides of the equation are the same. A curve is such that (dy)/(dx) = 12/(2x + 1) ^ 2 and P(1, 5) is a point on the curve . (i) The normal to the curve at P crosses the x-axis at Q. Find the coordinates of Q (ii) Find the equation of the curve. (iii) A point is moving along the curve in such a way that the x-coordinate is increasing at a constant rate of 0.3 units per second. Find the rate of increase of the y-coordinate when x=1 Can someone please help me with this proof?!Given: AC and BD bis, each other.Prove: ABCD is a parallelogram Marsha is driving 600 total miles on a trip. She has already driven 2/5 of the distance. How far has Marsha driven? A. 120 miles B. 240 miles C. 300 miles D. 360 miles list 10 mutiples of the following numbers 21 Which principle is found in The Declaration of the Rights of Man and in The Citizen? All governments should be direct democracies. A government's power comes from the people. Women should have the right to vote. Constitutions should be based on Christian teaching. Total points: --/10Attempts left: 3ve 2bengePablo is talking with his friend Mayra about her family'sbirthday celebrations. Complete the conversation bychoosing logical verbs from the list and writing them in thepresent tense. Each verb is used only once, and one verbwill not be used.TIP: There are three kinds of stem changes: e-- ie, oue,and ei. Stem-changes take place in all verb formsexcept nosotros and vosotros. Stem-changing verbs usethe same endings as regular verbs.dormir envolver | pedir poder repetir seguirservir | tenerchivePablo: En tu familia, festejan los cumpleaos de losfamiliares?FOA5 tv Tristan and two of his friends purchased tickets to a school play. Tristan paid for all the tickets with a $50.00 bill and received $23.00 in change. If Tristan used a coupon for 25% off, what was the original price for one ticket?-$6.75-$9.00-$12.00-$27.00 For all numbers x, f(x) = 3x + 3. What is the value off(3)? Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol? Many counties in Texas missed many school days in the fall of 2017 due to hurricanesthat year. A solution for how to make up those days was to add time to each school dayfor a portion of the year. It was decided that in order to make up a 6 hour school day, 10minutes would be added to each day. How many extended days would be needed tomake up 3 school days? (PEOPLE WHO HAVE READ CORALINE) Can someone please help me? I would give you the world!Coralines Survival Guide to the Other WorldYou will be creating a guidebook to help Coraline navigate the other world. Your guide must tell Coraline what to watch out for and how to deal with the physical, emotional, and mental challenges she faces.You could include Paragraphs like:Beware the Other MotherDont Trust the Other FatherWatch Out for the RatsA Map of the Other WorldYour guide should also include advice on what to do as well as what not to do, who you can trust, and what you need to find.Your guide should be at least 6-8 paragraphs long and contain at least one piece of textual evidence on each slide. Your guidebook should contain pictures and be visually attractive.this is my last try. any greedy people and im quitting brainly. I dont understand why you people do this! I just need help, im crying because 3 people have been greedy and all I need is help. Sorry.. I don't have anymore points to give anymore. this is all I have Help! Plz!What reflections map the figure onto itself?The reflections that map the figure onto itself are Ra and Rb where a = and b = which one is a balanced equation and an unbalanced equation? picture and equation are in the picture. thanks! What is Abstract Expressionism? An artistic movement in which art is not based on the depiction of reality It is generally acknowledged that as human beings age, it becomes more difficult for them to lose weight, or even maintain their current weight. People find they have to eat less and/or exercise more to maintain a healthy weight.Which is the most likely explanation of why weight loss/maintenance becomes more difficult as people age? a). As humans age, they becomes less active and use their muscles less; therefore, less chemical energy is converted to thermal energy.b). As humans age, the process of extracting energy from the food becomes less efficient, so more food is needed to provide the same amount of energy.c). As humans age, they become injured more often and need to increase the amount of food they eat to make repairs to body tissue.d). As humans age, the body does not convert chemical to thermal energy, so they do no burn off any calories when exercising.Please hurry! What two integers does Square root of 50 fall between? Approximately how much did the Civil War cost?A. About $8 billionB. About $8 millionC. About $1 billionD. About $100 million 6. What is the equation in slope-intercept form for the graph shown? A) y + x = 2B) y = 2x + 1C) y 2x = 1D) y = 2x + 1