Chemistry Middle School

Select all of the compounds.
Group of answer choices

water (H2O)

gold (Au)

nitric acid (HNO3)

cobalt (Co)

oxygen (O2)

Answers

Answer 1
Compounds have more than one element

H2O
HNO3

Related Questions

What is the influence of temperature on a chemical change?

Answers

Answer:

Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.

Explanation:

Please mark me brainliest

Would the following atoms have similar reactivity?

A) Elements in Group 2 have 2 energy levels.

B) Elements in Period 7 have 7 valence electrons.

C) Elements in Group 13 have 13 valence electrons.

D) Elements in Group 13 have 13 valence electrons.

Answers

I think D, not sure though!
Ur answer is d elements is group 13 have 13 valence electrons

What kinds of changes happen to water as it goes through the water cycle? Are they physical or chemical?

Answers

Answer:

When water changes state in the water cycle, the total number of water particles remains the same. The changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition. All changes of state involve the transfer of energy.

Explanation:

and its physical

Answer:

The answer is Physical

Explanation:

The changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition. All changes of state involve the transfer of energy. They are all the same but no matter what state it's in it's still water so it's physical.

When balancing a chemical equation, which of the following are you allowed to do?

Take away substances

Add coefficients

Change subscripts

Add new substances

Answers

You are only allowed to Add coefficients

Answer:

Add Coefficients

Explanation:

You CAN'T change the identity of an element or substance in an equation. You can only change coefficients.

True or False: Thermal energy can not transfer when particles of matter are in direct contact with each other, as they are not in solids, liquids,or gases.

Answers

Answer:false

Explanation:

that would be false hope it’s right !!

A chemist is using 341 milliliters of a solution of acid and water. If 16.1% of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth.

Answers

We need to assume that the acid in question is a liquid (not a solid or a gas),

and we need to assume that the 16.1% is specified as 16.1% (v/v) ,

where "v/v" means volume in volume,

meaning 16.2 milliliters of that acid are contained in 100 milliliters of the solution of acid and water.

With those assumptions, the ratio of acid volume to solution volume is

x/342 = 16.1/100 , where x= number of milliliters of acid in the 342

milliliters of solution.

x/342 = 16./100 ---> x=342x16.1/100 ---> x=55 (Rounded)

The formation of hurricanes, cyclones, and typhoons
A.true
B.false

Answers

True homie Bc I said it was
I say true aswell cause it makes sense

The edges of South America and Africa seem to fit together like a puzzle.
A.true
B.false

Answers

Answer: true

Explanation:

Answer:

It's true...

Explanation:

Fossils of tropical plants have been found in extremely cold regions.
A.true
B.false

Answers

false because they would freeeze
I think false it would have been gone by doing that

Gravitational potential energy is energy due to


being in motion


being on the ground


height above ground


doing work

Answers

Answer:

being on the ground

Explanation:

Answer:

Gravitational potential energy in terms of work done against gravity. ... We define this to be the gravitational potential energy (PEg) put into (or ... Figure 2. The change in gravitational potential energy (ΔPEg) between points A and B

Explanation:

hope this helps

Acceleration due to gravity =


100 m/s2



9.8 m/s2



62.3 m/s2



1.2 m/s2

Answers

Answer:

9.8

Explanation:

no explanation bbbbnnnnnnnnnnnnnnnnnnn

9.8m/s2 is the correct answer

plz help .....................

Answers

Answer:

1. conduction

2. radiation

3.convection

4. conduction?

5. radiation

6. convection

7. convection

8. convection

9. radiation

10.radiation

(sorry if they aren't all correct)

Infer How do you think these bones are involved in a whale’s movement?

Answers

I think that the bones involved in a whales movement help there tail move so they can swim
By keeping the muscle from flailing around and add support and stability when it moves its body,

I need help QUICKLY!!!!!!!!

Answers

Answer: Do you take Ms. Reyes

Explanation: The answer is Outside air, Nose, Lungs, Bloodstream, Cell

Answer:

outside air

nose

lungs

bloodstream

cell

A period of inactivity in a plant, where it does not grow to survive unfavorable environmental condidtions

Answers

Answer:

Dormancy

Explanation:

dormancy is the correct answer

can someone make me a lab report? Please......... Objective(s): In your own words, what was the purpose of this lab? Hypothesis: In this section, include the if/then statements for your lab. These statements reflect your predicted outcomes for the experiment. Procedure: In your own words, summarize the steps you took to complete your lab. Data: Data tables and graphs should be included in this section. Conclusion: Your conclusion will include a summary and an interpretation of the data results.

Answers

Answer:

When i used baking soda and water whith hydro-oxide it made elephant -toothpaste

Explanation:

hope this helped!

What are the 3 most important ecosystem services of a coral reef
1: Home to housands of species of fish, plants, and turtles

2: Corals provide treatments to human illnesses.

3: Reduces wave energy and helps protect against tsunamis

4: Heats up the planet.

5: Provides a good source of tacos.

Answers

2 Corsls provide treatments
1. Home to thousands of species of fish plants and turtles
2. Corals provide treatments to human illnesses
3. Reduces wave energy and helps protect against tsunamis
The other two answers aren’t true and don’t make sense

Plz HELP ITS SCIENCE!

Answers

Cell wall:
-acts like a skin
- most selectively controls what is inside and outside of the cell
-rigid

Cell membrane:
-gives a plant cell
-not rigid
Cell Wall
1) Acts like skin.
2) Rigid.
3)Gives the plant cell its shape.



Cell Membrane
1) is not rigid.
2) More selectively controls what goes in and out of the cell.

1. The ocean is also known as Earth's _____. *
A. evaported cloud
B. Giant Collector
C. Condensed Liquid
D. None o the above

Answers

Answer:

Earth is often called the ocean planet because it is 70% covered in water.

Explanation:

D.

D. none off they above because the ocean isnt a cloud it doesn’t collect things and its not condensed

Land bridges across oceans are used to connect all continents on earth.
A.true
B.false

Answers

Answer:

"A. True", is the right answer.

I’m going with him I believe it’s true

Choose all the answers that apply.

Conduction _____.

is the transfer of heat in fluids
requires physical contact between molecules
is the transfer of heat in solids
happens because molecules cause each other to vibrate

Answers

happens because molecules cause eachother to vibrate
happens because molecules cause each other to vibrate

What kind of change, physical or chemical, is happening when wood burns? How can you tell?

Answers

Answer:

Wood changes chemically to carbon dioxide when it burns and leaves a residue of ashes. These ashes cannot be changed back to wood. So it is a chemical change.

chemical
physical means it can go back to its shape; chemical it cannot.
for example when wood burns you can’t get that wood back to before it was burned!

hope this helps!

which one should I go in ??????

Answers

Answer:

the hatchery I think

Explanation:

because i think

European and North America coal fields line up.
A.true
B.false

Answers

Answer:

The Answer Is A

Explanation:

The diagram represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor. The process of boiling water is considered to be a

Answers

Answer:

I guess c?

Explanation:

take my answer by a grain of salt but the process of boiling water leads to physical change because eventually all water will become water vapor if boiled long enough

C is the answer to this question hope it’s right

Which of the water alternative energy source has an energy transfer chain of GPE-->KE-->EE?

Answers

Um what’s the question?
Elastic Potential Energy. Uses Gravitational potential energy, kinetic energy and EE.

PLEASEE HELP ASAP WILL MARK BRAINLIEST
This is on Asexual reproduction and I don't understand this at all so pleasee help

Answers

Answer:A,A,b,b

Explanation:i think i am learning this right now too!

I believe it is A, A, C, D

___________________ can be renewable or nonrenewable.
isn't it fossil fuels? i'm not sure

Answers

Answer:

wood, aluminum, gemstones, fabric, paper, rock and many others can be renewable or nonrenewable.

Hope i get brainliest

Explanation:

Fossil fuels is indeed correct.

Which three temperature readings all mean the same thing?


273 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit

100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit

273 Kelvin, 0 degrees Celsius, 212 degrees Fahrenheit

373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit

Someone please help!

Answers

The last one is correct :)

Answer:

273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit

Explanation:

2. A change in velocity (speed and/or direction) is... *
A.speed
B.Velocity
C. Acceleration

Answers

acceleration cause that is a magnitude
the answer is acceleration
Other Questions
A=r2 If the radius (r) of the circle is 3, what is the area in terms of ? How do parallels between the characterization of the character and the father point to a theme of the story? Review your reading notes, and cite text evidence in your response.Story link in comments Read the excerpt from Julius Caesar by William Shakespeare. Which statement develops the theme that abuse of power leads to destruction?CASSIUS: Why, man, he doth bestride the narrow worldLike a Colossus, and we petty menWalk under his huge legs and peep aboutTo find ourselves dishonorable graves.Men at some time are masters of their fates.The fault, dear Brutus, is not in our starsBut in ourselves, that we are underlings.Brutus and Caesarwhat should be in that Caesar?Why should that name be sounded more than yours?Write them together, yours is as fair a name.Sound them, it doth become the mouth as well.Weigh them, it is as heavy. Conjure with 'em,Brutus will start a spirit as soon as Caesar.Now in the names of all the gods at once,Upon what meat doth this our Caesar feedThat he is grown so great? Age, thou art shamed!Rome, thou hast lost the breed of noble bloods! If you buy one papaya for $3 then how many can you buy with $24 why would the bulb not light? REALLY NEED HELP PLEASE! Please help, due Tomorrow. Will mark brainlist if correct you've been working for a while, but your sister just got a job and is excited to have some of her "own" spending money. Money burns a hole in her pocket. What are some ideas on how she can save some money? if a function f is defined such that f(x+3) = f (x) + f(3) show that f(-3) = -f(3) What is the purpose of the story about the falcon being killed by the owl?A. To show that falcons just aren't as awesome as people make them out to beB. To show that the murder that took place has knocked nature itself out of order (fair is foul .. andwhatnot)C. To show that in any battle of birds, you can never underestimate the heart of an owlD. There is no purpose - 70 year old men tend to just ramble on and on and on and on ... Eloise has 293 books that she must package into boxes. Each box must hold 8 books. Eloise divides 293 by 8 and gets an answer of 36 R 5. What is the correct interpretation of R 5 for this situation? Pls Help! Need Answer! find the number of distinct permutations of the word "CALCULATOR." who needs help on Spanish Two functions, A and B, are described as follows: Function A y = 9x + 4 Function B The rate of change is 3 and the y-intercept is 4. How much more is the rate of change of function A than the slope of function B? (5 points) The marked price of a sweater at the clothing store was $24.During a sale, a discount of 25% was given. A further 15%discount was given to the customers who have the store'scredit card. How much would a member customer need to payfor the sweater during the sale if the customer paid with thestore's credit card? Round your answer to the nearest cent. 4s - (s - 12) = 1- (1 - 6s)? What is the formula for tin (II) nitrite? What is the mass of 2.5 moles of carbon dioxide? For this assignment, make a list of behaviors someone may be motivated to do to satisfy each of the following needs according to Maslow's theory. (FOR 100 POINTS!!!!!) I NEED IT TODAY PLS HELP1. Physiological Needs2. Safety Needs3. Belongingness Needs4. Esteem and Achievement Needs