Chemistry Middle School

A theory usually has observation and reasoning in its favor, although it may not be experimentally verified.

True or False

Answers

Answer 1
yes i believe it’s true
Answer 2
I believe it’s true :)

Related Questions

here the answers for what is radiation?

Transfer of heat through objects touching the source
Transfer of heat through direct physical contact
Transfer of heat through electromagnetic waves
Transfer of heat through the movement of particles

Answers

Transferring heat through electromagnetic waves
C . Transfer of heat through electromagnetic waves

Radiation is said to be process where heat is transferred between two objects in the form of electromagnetic waves . In radiation two object dont need to be in direct physical contact for the heat transfer to happen .

Select the substance or substances that are homogeneous mixtures

Question 22 options:

Solution


Compound


Colloid


Molecule


Suspension

Answers

Answer:

colloid, suspension, solution

Colloid , solution, suspension . I hope it helps you

2 more questions left

Answers

Answer:First one is 3

What is Litmus Paper?

Answers

paper stained with litmus which is used to indicate the acidity or alkalinity of a substance. Blue litmus paper turns red under acid conditions, and red litmus paper turns blue under alkaline conditions.

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Litmus is a natural dye which is extremely from lichens. it is the most commonly used indicator. Litmus is available in the form of blue and red litmus paper.

How many atoms are in (NH4)2SO4

Answers

Answer:

15

Explanation:

1N

4H

2S

(2*4=8)O

Ammonium sulfate has 15 atoms

How many atoms doesCo(NO3)2 have

Answers

The answer is 9. Calcium nitrate is made up
of 3 different elements that equal 9 atoms.
9 (I had this on a test and got it right)

Steps of photosynthesis:

___ ATP molecules form.
___ Sugar molecules form.
___ Chlorophyll absorbs light energy.

Answers

Answer:

Chlorophyll absorbs light energy, ATP molecules form, sugar molecules form. I'm pretty sure this is correct, but if it is not I'm sorry...

Explanation:

1. Chlorophyll absorbs light energy
2. ATP molecules form
3. Sugar molecules form

Which oneeeeeeeeeeeee

Answers

Answer:

Agree

Explanation:

This is what I found.

Air is actually a collection of very small molecules; oxygen gas and nitrogen gas are molecules made from two atoms each. Only the noble gases readily exist as single atoms.

Hope this helps.

Answer:

Air is actually a collection of very small molecules; oxygen gas and nitrogen gas are molecules made from two atoms each. Only the noble gases readily exist as single atoms.

Explanation:

I hope this helps. I'm not sure because it would depend on the gas. But I would go with disagree personally.

I will brainly
And 5 star rate!!

Answers

most of them explode is the answer to that question
one or more substances are converted to a different substance. an example could be ( iron + oxygen = rust

Leandra is baking cookies, and they are ready to come out of the oven. Before she takes them out of the oven, she puts oven mitts on. Why does Leandra do this?

A Heat energy moves from warmer objects to cooler ones.
B Heat energy moves from cooler objects to warmer ones.
C The light energy from her hands will transfer to the cookies.
D The coolness of her hands will transfer to the cookies and will make them cold.

Answers

Answer:

A.

Explanation:

Heat can't come from a cold object but can from a warm of hot one.

Answer: A

Heat moves from the hotter object out and distributes into colder objects. Also heat can’t come from a cold object. You can apply this to a real life scenario as you put oven mitts on so you don’t burn yourself.

What can the student conclude about the experiments? (Attachment)
I WILL MAKE YOU BRAINLIEST

A. Experiments 1 and 2 show chemical changes because bubbles were produced.

B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.

C. Experiment 1 shows a chemical change because bubbles were produced, and experiment 2 shows a physical change because a liquid turned into a solid.

D. Experiments 1 and 2 show physical changes because no new substances were produced.

Answers

Answer: B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.

Explanation: a physical change is reversible

chemical is 2 or more substances combined to make a reaction such as bubbling, change of color or temperature

Why is it important to have a control?


IN SOUND ENERGY!!!!!!!

Answers

Answer:

why it is important to have control in sound of energy is because noise is airborne sound energy within a broad range of frequencies that has the potential to cause either discomfort or injury to people working in the area. specifically, noise needs to be controlled In order to *protect the hearing of the personnel who work at the facility *

What are some advantages and disadvantages to the acid rain management techniques?

Answers

Disadvantages of acid rain:
• Acid rain affects the fresh water ponds and lakes and destroys the aquatic life as some species of fishes are rare and may be extinct
• it can affect the trees particularly those that are high altitude
• It can damage historical monuments and buildings
•soil can be affected and can lead to deaths of good microbes

Advantages of acid rain:
• it makes holes in limestone below ground, which creates caves and places to store groundwater, as well as providing habitat for some species
• But the new study shows that sulfuric in acid may have benefits, limiting global warming by counteracting the natural production of methane gases by microbes in wetland areas.

Of course you should do more studying on acid rain but these are the simple ones

Acid rain management techniques include protect plants from acid rain on falling on them.

What is acid rain?

Rain formed when sulfur dioxide and nitrogen oxide react with chemicals in the atmosphere like water,oxygen and carbon dioxide to form sulfuric acid and nitric acid and then falling to ground containing these acids is called acid rain.

Acid rain alters the environment the environment tremendously by damaging plants and aquatic ecosystems.Plants require a specific pH of soil for their optimum growth and nutrition.

Due to acid rain, the acidity of soil increases rendering it unfit for plant growth.Similarly, pH of water also increases which affects the survival of aquatic ecosystems.

It also damages the the monuments made of metals, marbles .Taj Mahal made up of white marble has turned yellowish due to acid rain.

Learn more about acid rain,here:

https://brainly.com/question/22143130

#SPJ2

35 POINTS AND BRAINLIEST!
Which description is not a property of an acid?
A. pH lower than 7
B. Turns litmus paper blue
C. Sour taste
D. Corrosive

Answers

Answer:

B turns litmus paper blue

Explanation:

B is the answer, hopefully that helps you!

In which direction does heat energy move?

A From cold objects to colder objects
B From colder objects to warmer ones
C From warmer objects to colder ones
D From warm objects to warmer objects

Answers

Answer:

B

Explanation:

Because when a cold object is cold it start to get warm because Of the air.

and it start to warm and it gets warm.

C



Heat usually flows to colder objects in order to make them both the same temperature and when the colder object finally gets hot and is the same temperature as the hotter object it stops flowing hope this helps:)

Question 6(Multiple Choice Worth 3 points)
(02.01 MC)

What is the landform in the image

Dune
Hill
Plateau
River

Answers

All of the above, is that an answer?

Answer:

C (Plateau) :)

Explanation:

Because a plateau is an area of relatively level high ground. so that means the answer is plateau!

Carlos listed some advantages and disadvantages of using nonrenewable resources.



Which best describes Carlos’s error?

Answers

Answer:

The answer is ores must be processed to make useful products!

Explanation:

Compound: ________________
. Found in soil; contains hydrogen (H) and oxygen (O)

Answers

Answer:

hydrogen im doing the same thing but diffrent

Explanation:

Hydrogen peroxide is the compound found in soil containing hydrogen and oxygen

Think of a creative title for a video about the states of matter

Answers

Answer:

States of life ?

Explanation:

maybe this ?

Which oneeee is ittt!!!!

Answers

Answer:

Disagree.

Explanation:

Nothing would remain. Everything on Earth is made up of atoms. The chair consists of only atoms. So, if you remove all of the atoms, nothing would be left! Hope this helps.

The answer would be disagree

When a log burns in a fire, a a physical change has occurred. b mass is gained. c new substances are formed.

Answers

Answer: technically it is chemical and physical change

Explanation: chemical bc it’s burning and physical bc it’s going from a log to ashes

Answer:

C! New substances are formed.

Explanation:

The burning log will release carbon dioxide, which is a new substance that was never there in the first place.

12 Points/Brainliest

Answers

Answer:

In fact, at the sea level, the the sea water boils at 100 degree C where atmospheric pressure is normal. However, the boiling takes place at a lower temperature at the top of a mountain due to low pressure. In other words the boiling is faster at the top of a mountain than that at its foot.

Explanation:

Hope this helped you :)

There is many sea levels

Compound: ________________
. Found in apatite soil, contain phosphorus (P)

Answers

Answer:

Ca5 or Apatite

Explanation:

Where is the DNA stored in a cell?

Answers

Answer: nucleus  

Explanation:

The dna cells are in the Nucleus

Why is it important to have a control?
IN SCIENCE.....SOUND CONTROL
P.S don't make it sound like ur a genius

Answers

its important to have control so you can predict or cause what happens to what you’re doing

Sugar, C6H12O6, is made of carbon, hydrogen, and oxygen atoms. Sugar is — (I WILL MAKE U BRAINLIEST


A. a compound because it is made of two or more atoms chemically combined and its parts cannot be separated by physical means

B. a mixture because it is made of different kinds of atoms but they are not chemically combined

C. a solution because it dissolves when mixed with water

D.an element because it is a pure substance whose parts cannot be separated

Answers

Sugar is a compound because it is made of two or more atoms chemically combined and its parts cannot be separated by physical means.

Answer:

A

Explanation:

D. is not the answer as there are many elements that go into Sugar

C. Is not the answer because it is not a solution

B. Is not the answer because they are not physically combined but chemically

Therfore A is the answer

I need help assappp
...........

Answers

Disagree is the awnser to this question
the answer is disagree

Please answer one or both of the questions below

Answers

Answer:

a=2 b=1 c=3 im litterally takeing the quiz right now

Explanation:

Answer:

a=2 b=1 c=3

Explanation:

use your brain :)

If a average person and a trained athlete where to exercise which pule rate would be slow and which pulse rate would be fast?

Answers

the average person would have a higher pulse rate when exercising because their body is not used to it, which makes it have to work harder to maintain that status

the athlete would have a slower pulse rate because their body is acclimated to the exercise and does not need to work as hard to maintain their body

Use the images below to complete the information on the table and answer questions 1-5.

Answers

Answer:

Proton: Positive

Electron: Negative

Neutron: No charge

Proton positive
Electron negative
Neutron neutral
Other Questions
PLEASE HELP!!!!! I WILL MARK BRAINLIEST1. Why, or under what circumstances, might it be hard to establish a large area of protected land? Solve the following system.y + 4z = -14x + 3z = -82x-3y=8Please actually help and dont just answer with idk for points A performer expects to sell 5,000 tickets for an upcoming concert. If they sell all 5,000, they will make make a total of $311,000 in sales from these tickets. All of the tickets cost the same price. 1. What is the price for one ticket? 2. How much will they make if they sell 7,000 tickets?3. How much will they make if they sell 10,000 tickets?4. How much will they make if they sell 120,000 tickets?5. If they make $379,420, how many tickets did they sell?6. How many tickets will they have to sell to make AT LEAST $5,000,000? Remember, you cannot sell part of a ticket.7. What is the constant of proportionality for this relationship? While reasonable safety concerns may require changes in the building, the "beacon" promised by Mr. Libeskind cannot under any circumstances be replaced with a dreary, fear-inspired fortress. The tower could become overly bulky if extra security demands are simply grafted onto the present plan. It already calls for a massive building, with too much extra office space - added to suit the developer - and a very tall spire for those who want a perpetual sign of defiance to terrorists. Nothing would better express capitulation to terrorism than a large skyscraper that looks like a vertical bunker.Given the authors tone, how do you think he feels about the security changes being made to the Freedom Tower?a.He is happy about the changes.b.He is unhappy about the changes.c.He is neutral about the changes.d.He believes the changes should be kept secret. A series of two-point crosses, involving 7 genes (a-g), were carried out, and the following recombination frequencies were obtained. Place the seven genes into linkage groups (where a linkage group is any group of genes that are genetically linked to each other). Within each linkage group, determine the order of genes and the distances between them. Genes % recombination Genes % recombination a-b 50 c-d 50 a-c 50 c-e 26 a-d 12 c-f 50 a-e 50 c-g 50 a-f 50 d-e 50 a-g 4 d-f 50 b-c 10 d-g 8 b-d 50 e-f 50 b-e 18 e-g 50 b-f 50 f-g 50 b-g 50 10. The ratio of red marbles to purple marbles is 3:8. If there are 44marbles, how many purple marbles are there? * The periodic table is a(n) _________________________________ system for the elements. AB InBev categorizes its brands into at least three categories: global brands, international brands, and local champions. Discuss the differences across these three different types of brands. Someone help me find the answer please What is true about warm, saturated air? It contains less water vapor than cold air.It contains the same amount of water vapor as cold air.It does not contain any water vapor.It contains more water vapor than cold air. Which statement best describes the relationship between the two figures? If a cube has a side length of 5 inches, what would be the volume of thatcube?2 points* Everything in the biosphere is connected true or false Write an equation for the line parallel to g(x) = 4x + 5 and passing through the point (10,7). Write the answer in slope-interceptform. How can the periodic table be used to help you find elements with properties similar to that of helium. 1.22Changes to the Constitution are calledA articlesB reviewsC. sectionsD amendmentsPlease select the best answer from the choices providedABCD 7.3 times 10^22 what does it equal? 2ax - 15 = 3(x + 5) + 5(x - 1) In the equation above, a is a constant. If no value of x satisfies the equation, what is the value of a ? NEED EXPLANATION! If you've ever shifted realities, How long did it take you? Adam and Eve were _____ with a decision to obey Gods law or to disobey his command A. TroubledB. ConfrontedC. Redeemed