Chemistry Middle School

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

I NEED HELP WITH THIS PLEASE

Answers

Answer 1

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:

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

Related Questions

-273 degrees = absolute zero

Group of answer choices

Celsius

Fahrenheit

Kelvin

Answers

Answer:

-273 degrees Celsius = zero degrees Kelvin = -459.67 Fahrenheit

Explanation:

If a scientist wants to make molecules move slower, what should they do? A. decrease their kinetic energy B. Transfer energy out of them C. Put them in a freezer D. All of the above

Answers

The answer is D because it’s D
The answer is D all of the abound

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

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.

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

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.

Why does mantle rock begin to sink back towards the lower mantle from the area closest to the crust?
(Science/Plate Tectonic Movement)

Answers

Answer: Convection Currents

Explanation: The mantle rock is solid and denser because it is cooler. This means it will sink closer to lower mantle as warmer, lense dense rock/magma moves upwards.

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!

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

Help me please!!!!!!!!!

Answers

Answer:Pores,collar,spicules

Geologic and fossil evidence suggests that all landmasses were once connected in a supercontinent named PangaeaWhat geologic phenomenon can exp the change from Pangaea to the current arrangement of continents?

A. Changes in tectonic plate positions

B. Changes in volcanic activity in the oceans

C. Changes in rock weathering and soil erosion

D. Changes in oceanic currents and temperatures

Answers

Answer:

A

Explanation:

continental drift

The answer is A , hope this helps!

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

Which of the following statements about fats is FALSE?
They are insoluble, making them good for long-term energy storage within the body.
They are used to make cell membranes.
They dissolve easily in the body’s fluids.
They can affect blood pressure, inflammation and the immune system.

Answers

Answer:

They dissolve easily in the body’s fluids

The answer is: The dissolve easily in the body’s fluids.

Fats don’t dissolve easily.

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

C. And for the rest not sure
8 is C.
9 is A.
6 is B.

Used to measure temperature in 8th grade science.

Group of answer choices

Celsius

Fahrenheit

Kelvin

Answers

Answer:

Fahrenheit

Explanation:

What is the effect of climate on ice?
How does ice affect water systems?

Answers

The effect is that it melts the ice and affects the climate by not have drinking water
The ice will either melt or freeze even more because of the climate this can affect water systems by either adding water from the ice melting and affecting the salt balance in the ocean and if the water freezes more the opposite will happen

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:

What vocabulary word describes this "section" of rock layers

Answers

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

What is a typical way for the driver to change the motion of the car?



A. apply a horizontal force by using the brakes




B. change the mass of the car




C. balance the forces acting on the car




D. remove the friction between the car and the road

Answers

Answer:

Explanation: the friction between the ground and the car will most definitely not change unless you rather balance the force out or force to use brakes

Its is C balance the forces acting on the car



I hope this helped :)

Help Please! its another cell functions

Answers

Answer: last option!

Explanation:

Answer:

The oxygen molecules will spread out evenly and many will enter the cell by passing through tiny openings in the membrane.

Explanation:

A cell membrane will allow the oxygen to enter by diffusion. Diffusion is the movement of particles from an are of higher concentration to an area of lower concentration. Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion.

How does brittleness of graphite compare to diamonds?

Graphite is more brittle than diamonds.
Graphite is less brittle than diamonds.
Graphite has the same brittleness to diamonds.
Graphite and diamonds are both very brittle.

Answers

The first one I think

Answer:

A

Explanation:

Because Graphite is more brittle than diamonds.

hope this work.

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 type of energy is the transfer of heat?

Question 2 options:

sound


potential


thermal


elastic

Answers

Thermal








Hope this helped
Thermal I have learned it thermal is the transfer of heat.

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

compare and contrast the benefits with the potential negative effects of utilizing hydraulic fracturing to produce oil.

Answers

Answer:

k

Explanation:

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

HELP PLEASE I dont understand this (7th Grade science)

Answers

For the second one it is physical
The first is chemical

Please answer each question! Due today! Will mark brainliest!

1.) How does hydrokinetic energy connect to magnetism?
2.) How does hydrokinetic energy connect to circuits?
3.) How does hydrokinetic energy connect to magnets?
4.) How does hydrokinetic energy connect to electrical charges?
5.) How does hydrokinetic energy connect to the parts of waves?

Answers

Answer:

1.They generate power only from the kinetic energy of moving water (current).

2.relating to the motions of fluids or the forces which produce or affect such motions — compare hydrostatic.

3. It uses water motion to generate a high-pressure liquid rather than electricity.

4. tidal currents, ocean currents or river currents into electrical power.

5.When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.

Explanation:

PLEASE HELP ASAP
Avanti works in a bookstore. She has four books and is going to place them in two stacks. The diagram above shows the books before they touch. Use the information in the diagram to answer the question.
How did the temperatures of the four books compare before they touched?

Answers

They were different and they could be the top book was different from the bottom
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