Chemistry Middle School

predict how many paper clips a 7.5 V battery would pick up for both the 25-
coll electromagnet and the 50-coll electromagnet.
per clips
a 7.5 V battery woua pick up for both the 25-

Answers

Answer 1

Answer:

B. is correct

Explanation:

Related Questions

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.

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

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!!!

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.

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.

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.

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

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:

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

Which water feature is often associated with condensation?
Frozen lakes
The ocean
Clouds and fog
Water vapor rising from plants

Answers

I think it is water vapor since condensation is the process of water vapor going back to liquid water.

Clouds and fog are water features often associated with condensation. The correct option is C.

The process by which water vapour, a gaseous form of water, changes into liquid water is called condensation.

When warm, moist air meets a cooler surface or when the air itself cools, it happens. As a result of this cooling, water vapour loses energy and condenses into tiny water droplets or ice crystals, which are what are seen as clouds or fog.

Even though the ocean and frozen lakes are both connected to water, condensation is not a direct result of either of these. As opposed to condensation, water vapour rising from plants is a result of transpiration.

Thus, the correct option is C.

For more details regarding Condensation, visit:

https://brainly.com/question/956180

#SPJ6

Your question seems incomplete, the probable complete question is:

Which water feature is often associated with condensation?

A. Frozen lakes

B. The ocean

C. Clouds and fog

D. Water vapor rising from plants

What vocabulary word describes this "section" of rock layers

Answers

What section? I need more info :(
Crust? Because it’s the surface

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

Answers

Answer:

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume. The moving particles are called charge carriers, which may be one of several types of particles, depending on the conductor. An electrical insulator is a material in which the electron does not flow freely or the atom of the insulator have tightly bound electrons whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field.

help with thisss please :)​

Answers

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

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

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:

A

Explanation:

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

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!

please help b4 i literally will get killedd PLZZZ.

Answers

This is the answer
1st choice

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

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

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!

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

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

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.

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 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!

10 points for 5 questions plz help I need this done in the next 30 mins or like ASAP pleeeeeesssssssssssssssssssssssssssssssssss
i also am puting more out tooooooo

Answers

For question 34 I have high hopes it’s D

Answer

im thinking its D or E

Explanation:

Can some someone plz help

Answers

Answer:

ummmmmmmmmmmmmmmmmmmm

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

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.

How do landmasses impact the movement of air and water?



(A) They stop all movement of both air and water.


(B) They speed up the air and water and allow it to pass though.


(C) They change the direction and slow them down.


(D) They slow down the air but speed up the water.

Answers

I think that the correct answer would be b
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