Chemistry Middle School

Can somebody please help me with this I only have 10 minutes and I have to do other work please do all three questions in the pictures!

Answers

Answer 1

C. And for the rest not sure

Answer 2

8 is C.
9 is A.
6 is B.

Related Questions

ASAP ILL MARK BRAINLIEST!!!!!! EASY
1. What is ocean acidification? How might it impact global biodiversity?

2. How can you as an individual help tackle this problem? (What specifically can you do?)

Answers

Answer:

1.Our results indicate that, at higher biodiversity, the impact of acidification on otherwise highly vulnerable key organisms can be reduced by 50 to >90%, depending on the species

2.Positive attitude is sometimes all it takes to turn a bad situation around. On the other side, a bad attitude can take a problem and quickly make it worse. Helps You Make Good Decisions – Anger clouds your judgement. When you let yourself get upset, you impact your ability to make good decisions.

ahahah what the guy above me said

How is the DNA within a cells’ nucleus like that of a computer?

Answers

it gives information to the brain I think I’m not entirely sure !!83
Yeah!

More than sure the guy above me is actually right!

What is a pollinator?

A) an animal that transfers pollen from flower to flower
B) a colorful flower that attracts insects
C) an insect that makes pollen
D) a flower that produces fruit for animals to eat

Will mark brainliest

Answers

It's A: an animal that transfers pollen from flower to flower.

Good Luck!

A , an animal that transfer is pollen from flower to flower

What vocabulary word describes this "section" of rock layers

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What section? I need more info :(

Crust? Because it’s the surface

Identify the forces acting on you when you are standing still. Explain why the forces do not cause you to move.

Answers

Answer:

When you are standing still, you are exerting gravitational force on the ground. The downward gravitational force is balanced by the normal reaction force acting upwards. Also, since you are not moving the resultant of all forces is zero. Since the resultant force is zero, then according to Newton's 1st law, there is no change in the state of rest.

Explanation:

What do you think caused the original properties of the substances to change in order to form “Elephant Toothpaste"?

Answers

The starting material or materials for a chemical reaction are referred to as the reactants. The substance or substances produced from a chemical reaction are called products. Sometimes a secondary product, a byproduct, can also be created at the same time as the desired product(s).
Not every chemical reaction occurs in the same way. There are different types of chemical reactions, including synthesis reactions, decomposition reactions, and displacement reactions. In this experiment, a decomposition reaction takes place. During a decomposition reaction, a compound breaks apart into two or more products. Most decomposition reactions need an outside source of energy in order to take place.
Hydrogen peroxide is not a very stable compound, so it slowly decomposes into water and oxygen gas under normal conditions. In this reaction, yeast is used as a catalyst. A catalyst is a substance that helps to change the rate of a reaction. During the reaction, the catalyst is not consumed. As a result, the yeast makes the reaction occur much faster; it causes the hydrogen peroxide to break down and release the oxygen gas much faster.
The soap is used to help us “see” the reaction. Bubbles of oxygen become trapped in the soap, creating foam. The reaction occurs so quickly, releasing so much gas and creating so much foam, that the foam begins to flow out of the bottle. The result of this reaction looks like toothpaste being squeezed out of a tube.
In addition, the bottle will feel warm to the touch because the reaction is exothermic. An exothermic reaction or process is one that gives off energy. In contrast, an endothermic reaction or process is one that requires or absorbs energy.
HYPOTHESIS
uAdding yeast to hydrogen peroxide
will cause the hydrogen peroxide to
decompose quickly into water and oxygen gas, creating foam as the gas becomes trapped in liquid dish soap and pushes upward out of the bottle.
FORMULAS & EQUATIONS
Hydrogen peroxide is a relatively clear liquid substance. It is soluble in water and is often sold as a mixture of H2O2 in water. The hydrogen peroxide used in this experiment is actually a 6% solution of H2O2 in water.
The chemical formula for hydrogen peroxide is H2O2.
Hydrogen peroxide naturally decomposes into water and oxygen gas. The reaction is shown by the following equation:
2H2O2 (aq)g2H2O (l) + O2 (g)
The rate of the reaction can be increased by introducing a catalyst. In this experiment, the catalyst is yeast. Yeast is a microorganism that is part of the fungi family. Therefore, in the equation below, the catalyst is indicated above the arrow.
yeast
2H2O2 (aq) g 2H2O (l) + O2 (g)
The hydrogen peroxide used in the experiment is
actually a mixture of water and hydrogen peroxide.
CONNECT TO THE YOU BE THE CHEMIST CHALLENGE
For additional background information, please review CEF’s Challenge study materials online at http://www.chemed.org/ybtc/challenge/study.aspx.
• Additional information on elements, compounds, and physical and chemical changes can be found in the Classification of Matter section of CEF’s Passport to Science Exploration: The Core of Chemistry.
• Additional information on chemical reactions can be found in the Chemical Reactions section of CEF’s Passport to Science Exploration: Chemistry

When it mixes the chemicals react to one another and form elephant toothpaste

Why does a nucleus always have a positive charge?

pls answer or else I will give you up.

Answers

Answer:

Nucleus has a positive charge as it has protons, which are positively charged inside it.

This is because the nucleus has protons. The atoms do not have a charge because the negative electrons and positive protons cancel eachother out causing the atom to be considered neutral. Hope this helps

ANSWER ASAPP GIVING BRAINLIEST AND STUFF!
Write a short paragraph about electrical current using the terms conductor and insulator.

Answers

In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. ... Most atoms hold on to their electrons tightly and are insulators.

I believe that’s what your talking about if not I’m so sorry

Answer:

Bet

Explanation:

In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.

Which has a higher temperature: a snowman or a lit match?

Group of answer choices

lit match

snowman

No answer text provided.

Answers

Answer:

Snowman

Explanation:

Probably because when you throw the match the snowman will devour it because it has an higher temperature of coldness.

help with thisss please :)

Answers

Cosh(2^3g+40 I think this is the answer

PLZZ HELPPP FRLLL IM GONNA GET MY LIFE ENDED

Answers

Not completely sure but I think it's

Answer: Local winds affect a smaller area while global winds affect a larger area

Explanation: This is because local winds affect certain areas and global winds go all around the planet

It is the last option because weather can vary within different places. A global wind means spread out and more expanded, but a local area is one nearby, taking place of a smaller area.

please help b4 i literally will get killedd PLZZZ.

Answers

This is the answer
1st choice

You are designing an office building. In order to reduce noise from high-frequency sounds between offices above and below each other, would you choose carpet on concrete or wood floors? Explain your answer.

Answers

Answer:

concrete has more mass and it will block more noise than than the wood plus the wood is thiner the thicker the substance is the better u won't hear noise

Explanation:

Carpet for sure. Have you ever heard how loud a dog walking on wood compared to carpet is.

luke rented a self-storage unit. he wants to know how many boxes will fit the unit. which measurement of the unit is luke finding when he fills it with boxes?
a. the surface area of the unit
b. the length of the unit
c. the area of the unit
d. the volume of the unit

Answers

Answer:

Explanation:

D because you Can stack the boxes so it wouldn’t be surface length or area

Can some someone plz help

Answers

Answer:

ummmmmmmmmmmmmmmmmmmm

describe the conditions that affect the rate of a chemical reaction.

I NEED HELP WITH THIS PLEASE

Answers

Answer:

The rates at which reactants are consumed and products are formed during chemical reactions vary greatly. Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.

Explanation:

Reactions occur when 2 molecules effectively collide, each having minimum energetic and correct orientation.

Has negative values

Group of answer choices

Celsius and Fahrenheit

Celsius and Kelvin

Fahrenheit and Kelvin

Answers

Answer:

Explanation:

Celsius and Fahrenheit

They have negative values but not Kelvin as its lowest is O Degree Kelvin.

Hope this helps!

BRAINLIEST ME PLS!!!

Help?
The question is down below.

Answers

The first three are T I don’t know about the next two and the last one is T

I believe first one is T. The next one atoms are composed of smaller particles of matter so I think T. The third one is T. The fourth is T. The fifth might be false. And lastly atom is a small part of matter so false maybe. If that makes sense

I might quit brainly because people are just using me for my points.... could someone answer this for me?
Why does every part of the body need food and oxygen delivered to it?

a. The cells of the body need oxygen to make mitosis and food to make ribosomes.

b. The cells of the body use the oxygen to release the energy from the food.

c. The cells of the body need to make carbon dioxide out of food and oxygen.

d. The cells of the body need food and oxygen for osmosis to happen.

Answers

Answer:

B The cells of the body use the oxygen to release the energy from the food.

Explanation:

Good Luck!

Using your knowledge of the reflection, absorption, and transmission of mechanical waves, Why do you think the foam is used, and how do you think it functions?

Answers

I think you forgot to put the image

Which has more thermal energy: a snowman or a lit match?

Group of answer choices

snowman

lit match

No answer text provided.

Answers

a lit match would have more thermal energy because the match conducts heat which is a form of thermal energy

snowman is the answer buddy

I need some help with this oddly specific science question Why are sea breezes felt during the day and land breezes at night?

A.
The land and the air above it heats and cools slower than the water, causing a land breeze at night and a sea breeze during the day.

B.
The land and the air above it heats and cools faster than the water, causing a land breeze at night and a sea breeze during the day.

C.
High tides cool off the beach, causing a land breeze at night and a sea breeze during the day.

D.
High tides cool off the beach, causing a sea breeze at night and a land breeze during the day.

Answers

B should be correct

What are the physical properties of the cookie/cracker? List 3 or more.

Answers

Answer

cookie

shape:circle

texture: bumpy rough on side

color:brown

size: bigger than a quarter

Explanation:

I cant see it so just describe the color shape size texture

Answer:

1. Delicious

2. Soft

3. Cronchyy (ik its crunchy )

4. Best foods you will ever eat

Explanation:

Try it for yourself!

Which food combination produces a protein complete meal?
white rice and broccoli
brown rice and beans
white bread and cheese
peanut butter and jelly

Answers

Answer:

brown rice and beans

Explanation:

because the rice is really filling and healthy while beans have proteins

Answer:

the second option

Explanation:

hope this helps

This is for science

Identifying an Unknown Substance (continued)

Which of these substances do you think is the unknown substance the criminal used to make a
hole in the glass? (highlight one)
A hydrobromic acid

B hydrofluoric acid

C iodine monochloride

D perchloric acid

Explain your answer.

Answers

Answer:D

Explanation:Hydrochloric acid is highly corrosive and can permanently damage and etch your glass.

Pretty sure the answer is d

Another oddly specific question reeeeeeeeee. What causes the difference in air pressure around the Earth? A.
The warm air sinks at the poles and cold air rises at the equator.

B.
The warm air rises at the equator and cold air rises at the poles.

C.
The warm air sinks at the equator and cold air rises at the poles.

D.
The warm air rises at the equator and cold air sinks at the poles.

Answers

Answer:

Explanation:

Answer: The answer would be A!

Explanation: Hope I helped you! ^^

Where does the fuel people use to heat homes and power cars come from?

A. the remains of plants and animals that lived long ago
B. sedimentary rock that is thousands of years old
C. factories make it from rocks
D. inside fossils found deep in canyons

Answers

It’s probably A. Since natural gas and petroleum comes from plants and coal comes from animals both from millions of years ago that when they died, they were buried under layers of soil and dirt, then after millions of years where humans then extracted oil and more.

Answer: im pretty sure its A

Explanation:

hi person

Why is it not easy to replace a link in a food chain?

The decomposers will not decompose another type of organisms.
There are not enough plants to replace the previous organisms.
There are not enough animals to replace the previous organism.
There may be limited type of natural predators organisms may have.

Answers

Answer:

D-the last option

Explanation:

I think I'm correct.

A truck was carrying a substance in a tank. The molecules of that substance were moving away from each other. The truck parked overnight in a place where energy transferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after energy was transferred out of them.

Answers

Answer:It might have been what was in the substance like salt for the mattter

Explanation:

After parking overnight, where energy transferred out of the substance, in the morning, the substance was a gas. Hence, the molecules were moving away from each other too

Please help, I'll give 5 stars and brainliest!

Answers

Huh. Is this supposed to be biology?

1. Potential
2. Gravity and weigh and height
3. Stretched
4. Elastic potential energy and stored
5. Chemical energy first then thermal energy
I don’t know if this is actually all correct but I tried my best

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