Chemistry Middle School

please help :(
.......

Please Help :(.......

Answers

Answer 1
False



Explanation:
It’s not true
Answer 2
The answer is false

Related Questions

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

please answer , please

please answer , please

Answers

I should pay attention to class next time

Protists and Fungi Quiz

Answers

Answer:

thank you for the points

Explanation:

C₇H₆O₂ + O₂ -->CO₂ +H₂O Find the chemical reaction

Answers

Answer:

Air

Explanation:

idrk im just an idiot

Abstract. Carbonic acid (H2CO3) forms in small amounts when CO2 dissolves in H2O, yet decomposes rapidly under ambient conditions of temperature and pressure. Despite its fleeting existence, H2CO3 plays an important role in the global carbon cycle and in biological carbonate-containing systems.



I’m not sure if this is right

Hi can someone plz help me!! I’m behind on this and I really need help on it. I will try to mark as brainliest

Hi can someone plz help me!! Im behind on this and I really need help on it. I will try to mark as brainliest

Answers

You just need to do what it says. Build the model or use some things as substitutes if you are missing an ingredient and write down what you identified.

There isn't really much better help I could give, sorry. I hope this helps.

What is the series of energy transfers shown in the picture below?

A) chemical to mechanical to electrical to thermal
B) mechanical to chemical to thermal to electrical
C) electrical to thermal to mechanical to chemical
D) thermal to mechanical to electrical to chemical

What is the series of energy transfers shown in the picture below?A) chemical to mechanical to electrical

Answers

Answer:

The correct answer is A.

A is the correct answer

Pls could help me complete the "standart form" part :(

Pls could help me complete the "standart form" part :(

Answers

Answer:

I don’t know bro

Explanation: WHY DID U REMOVE THIS

Do you think rayon when burnt will stick to the body like other synthetic fibers?

Answers

In other words, since rayon is made from the plant fiber it does not get stick to our body while we burn it
it will not stick to the body most likely

Please help me on this question I'm confusied on it

Please help me on this question I'm confusied on it

Answers

Answer:

So you need to look for the average speed of each car, which would allow you to then enter the numbers.

Explanation:

Hope this helps! Have a great say! :)

Find the average speed of the car and enter those numbers.

When the air inside a school gets warmer (temperature increases), the molecules of air move faster and farther apart. True Or False?

Answers

Answer: The answer is false

Answer:

The answer is False

Explanation:

If you want a visual representation, take water. When its left at room temperature the molecules are moving but not very fast. If you bring that water to a boil, the molecules move a lot faster and get closes together. If you were to freeze that water inside a closed container you would see the water inside expand because the molecules grow further apart.

To answer the question, while the molecules do move faster, they do not move further apart.

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s

kinetic energy is given as

2) when speed is 3 m/s

kinetic energy is given as

3) when speed is 4 m/s

kinetic energy is given as

4) when speed is 5 m/s

kinetic energy is given as

5) when speed is 6 m/s

kinetic energy is given as

What do you see happen to the wave on the string when you increase the amplitude?

Answers

Answer:

Amplitude is how "tall" a wave is from its centre point. When you increase the amplitude of a wave, the wave becomes stretched vertically, becoming "taller."

An air_______is a large section of air that has an even temperature, humidity, and pressure. They carry their own weather.

Answers

Answer:

mass is the answer

An air mass is the answer

Imagine that scientists have found a planet with an outer layer divided into plates made of hard, solid rock, but the mantle below the plates is made of hard, solid rock instead of soft, solid rock as it is on Earth.

Do you think plate motion would take place on that planet? Why or why not?

Answers

No because the way the plates move is because earth has soft rock under the surface

The layer of planets is made of crust, mantle, and core. The tectonic plate motion on the newly found planet will not occur as it has a hard and solid mantle.

What are tectonic plates?

Tectonic plates are defined as sold rocks that make up the mantle layer of the lithosphere of the planet. They are massive and irregular in shape that can move under high pressure and temperature conditions to form mountains and landscapes.

The plate tectonic of the planet is composed of hard, solid rock that will not be able to move or solid like that of Earth as they are hard enough to show the movement of sliding over each other unlike the soft, solid rock of Earth's lithosphere.

Therefore, the plate tectonic of the planet with hard, solid rocks will not show any movements.

Learn more about tectonic plates, here:

https://brainly.com/question/28259981

#SPJ2

How does blood flow into the right atrium?(A)through the aorta.(B)through the pulmonary artery.(C)through the left ventricle.(D)through the vena cava. plz help if you don't know do not anwer

Answers

(d) is the answer!!!!!!!!

In addition to carbon dioxide, what other two ingredients does a plant need for photosynthesis? ( A: water and sunlight B: Sunlight and soil C: sunlight and oxygen D: water and oxygen)

Answers

In addition to carbon dioxide, water and sunlight are the two ingredients that a plant need for photosynthesis. Therefore, the correct option is option A.

What is photosynthesis?

Green plants along with certain other organisms convert sunlight into chemical energy through a process called photosynthesis. Light energy is gathered and utilised during photosynthesis by green plants to change moisture, carbon dioxide, plus minerals into oxygen- and energy-rich organic molecules.

It is impossible to overstate the role that photosynthesis plays in sustaining life on Earth. There'd soon be food or even other organic materials on Earth if photosynthesis stopped. The majority of life would vanish, and eventually, the atmosphere of Earth would contain almost no gaseous oxygen. In addition to carbon dioxide, water and sunlight are the two ingredients that a plant need for photosynthesis.

Therefore, the correct option is option A.

To know more about photosynthesis, here:

https://brainly.com/question/29775046

#SPJ2

I'll give Brainliest!!!
Which of the following is not a physical change?
A.sublimation of iodine C. tearing a piece of cloth
B. burning of wax in a candle D. dissolving sugar in a tea

Answers

Answer: B. Burning of wax in a candle

Explanation: Burning of wax is a chemical change due to the combustion of fuel in the presence of oxygen to produce carbon dioxide. A physical change part of it is when the wax of candle melts and the shape is lost.

The answer would be B.

Please help me por favor :'(

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

The diagram shows Ned’s movement as he left his house and traveled to different places throughout the day.

A line, which turns at labeled black boxes with a key showing how far 1 mile is on the line. The line starts at V Ned's House and runs right to W Pet Store then down and right to X Library then right to Y Swimming Pool then up and right to Z Gym.
Which reference point should be used to find out how far Ned traveled when he went from the pet store to the swimming pool?

V
W
X
Z

Answers

Answer:

w

Explanation:

Answer:

w

Explanation:

im taking the test rn

Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex

Answers

Answer:

The answer is C.

Explanation:

Please give brainliest

Answer:

D

Explanation:

complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.

The atomic number of an element:
Question 2 options:

Tells you the mass of the atom

Tells you the number of energy levels there are around the atom

Tells you the identity of the atom

Tells you how many valence electrons the atom has

Answers

The answer would be C, it tells you the identity of the atom.

Write a summary of what you have learned about how incoming forces and outgoing forces are related (newton's cradle)

Answers

Newton's Cradle is a classic physics demonstration that illustrates the principles of conservation of momentum and energy, as well as the relationship between incoming and outgoing forces. The device consists of a series of equally spaced, suspended metal balls (typically five) that are aligned in a horizontal row. When one ball is lifted and released, it strikes the next ball in line, causing a transfer of force through the remaining balls, ultimately resulting in the last ball swinging outward. This process repeats as the balls continue to collide.

The relationship between incoming and outgoing forces in Newton's Cradle can be understood through the following concepts:

Conservation of Momentum: In a closed system with no external forces, the total momentum before a collision is equal to the total momentum after the collision. In Newton's Cradle, the momentum of the incoming ball is transferred through the stationary balls and eventually to the last ball, which swings outward with a momentum equal to the initial ball's momentum.
Conservation of Energy: Similarly, the total mechanical energy (kinetic and potential) in a closed system remains constant. In the context of Newton's Cradle, the kinetic energy of the incoming ball is transferred through the stationary balls, and eventually to the last ball, which swings outward with kinetic energy equal to that of the incoming ball. Potential energy is also involved as the balls swing and momentarily come to rest at their highest points.
Elastic Collisions: Newton's Cradle demonstrates nearly perfect elastic collisions, wherein both momentum and kinetic energy are conserved. In reality, some energy is lost to heat and sound, making the collisions slightly inelastic. However, the demonstration is still a useful approximation for understanding the transfer of forces.
Force Transfer: The incoming force exerted by the first ball is transmitted through the intervening balls to the last ball without causing any significant movement of the middle balls. This occurs because the balls are very close together and the time taken for the force to be transferred is minimal, allowing the middle balls to remain nearly stationary.
In summary, Newton's Cradle demonstrates the relationship between incoming and outgoing forces through the principles of conservation of momentum and energy, elastic collisions, and force transfer. The device provides a clear visual representation of these fundamental concepts in physics.
Newton's Cradle is a classic physics demonstration that illustrates the conservation of momentum and energy. The cradle consists of a row of suspended metal spheres that are free to swing back and forth. When one of the spheres is lifted and released, it swings down and collides with the next sphere in the row. This collision causes the first sphere to come to a stop and transfers its momentum and energy to the second sphere, which in turn transfers it to the third sphere, and so on. The incoming force from the first sphere is transferred through the chain of spheres as outgoing forces, causing the last sphere to swing upward to the same height as the first. The total momentum and energy of the system remain constant throughout the process, demonstrating the principle of conservation of momentum and energy.

You are to write a poem or song about the planets and the information you submit have to be true about each planet.

Answers

someone added the answer already hope that helps you out

Answer:

our solar system includes the sun and all the planets moons dwarf planets and asteroids that orbit around it the four planets closest to the sun include mercury venus earth and mars these inner planets are made of rock and metals they are quite small compared to the outer planets the four outer planets are called gas giants because they are made mostly of gases the outer planets include jupiter saturn uranus and neptune the most well-known dwarf planet in our solar system is Pluto

What is the age for rock layer C?

Younger than 80 million years

Younger than 40 million years

older than 120 million years

Older than 180 million years but younger
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message
Support your answer for question 5. What information in the diagram suports your answer?

What is the age for rock layer C? Younger than 80 million yearsYounger than 40 million yearsolder than

Answers

Answer:

The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A.

Explanation:

Answer:

4.36 billion years

Explanation:

Before this study, the oldest dated rocks were from a body of rock known as the Acasta Gneiss in the Northwest Territories, which are 4.03 billion years old.

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Answers

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

C the atom becomes positively charged

Who was settling in Minnesota after the Civil War and why?

Answers

I think it’s the British

would you use baking powder to see whether or not it is an acid or a substance? yes/no?

Answers

Yes you would use it

Answer:

yes.

Explanation:

If you have a liquid and you want to know if it is acidic, an easy way to tell is to mix in a little baking soda. The baking soda reacts with acids to produce bubbles.

You may be familiar with building a homemade kitchen volcano. You mix vinegar (an acid) with baking soda. It foams up as the baking soda reacts with the acid. This is in essence what you can do to test if a solution is acidic or not. If there is no acid present, the solution will not bubble when you add the baking soda.

What is the main way viruses cause disease in the body
A. By feeding directly on your body parts
B. By using your body's cells to make new viruses
C. By absorbing nutrients from your bloodstream
D. By breaking down your body's cells for nutrients

What is the main way viruses cause disease in the bodyA. By feeding directly on your body partsB. By

Answers

I think the answer is B

Answer:

the answer is B

Explanation:

this is because viruses need to enter a host cell to start reproduce. they usually use your cell to create "virus making factories".

hope it helps

no problems

What evidence do scientists have to support the big bang theory as the origin of the universe?

Answers

Explanation:

Two major scientific discoveries provide strong support for the Big Bang theory: • Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.

Answer:

Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.

Explanation:

Someone please help me if right I’ll give you 5$

Someone please help me if right Ill give you 5$

Answers

Answer:DId you even read it you have to that in your lab class and  says you need other information aint no way i can answer that

Explanation:

The answer above is correct just pass it
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