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Sav [38]
3 years ago
8

THE RIGHT ANSWER WILL RECIEVE A BRAINLEST AND POINTS AND THANXS!!!

Chemistry
2 answers:
olya-2409 [2.1K]3 years ago
7 0

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.


Answer: If a new substance is formed its a chemical change if there is no change its a physical change.

Molodets [167]3 years ago
3 0
If you can't revert the change using physical means then it is a chemical other wise it is a physical, such as rusting, you can't revert it, but freezing you can heat it and get the thing you started with back
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Please help I will give extra points
Svetllana [295]
I think that it would be 12
7 0
3 years ago
Read 2 more answers
Will was riding his bike when a dog ran out in front of him. he slammed on his brakes. during this quick stop, some of the mecha
riadik2000 [5.3K]

Answer is: heat energy.

Braking is the process of controlling the velocity of an object (in this example bicycle) by inhibiting its motion.

Mechanical energy can be either kinetic or potential energy and has to do with the energy of position and motion of an object.

Kinetic energy is energy of the speed of an object and how much mass it has; basically how the object is moving.

Potential energy is type of energy is stored energy; it can be increased by getting into a higher position and/or stretching an object such as a rubber band.

A mechanical brake applies a friction force to convert the kinetic energy of the bicycle into heat energy which then dissipates into the atmosphere.

3 0
4 years ago
Read 2 more answers
A sample of carbon dioxide has a mass of 54.0 g.
cluponka [151]

Since 1 molecule =1 mole

So 1 mole has 44grams

4 0
3 years ago
Use condensed electron configurations and Lewis electron-dot symbols to depict the ions formed from each of the following atoms,
Dennis_Churaev [7]

The formula for Cs and S is Cs₂S.

For Cs and S,

Ions formed will be Cs⁺ and S²⁻

As cesium belongs to group 1A and sulfur belongs to group 6A. Therefore, the condensed electronic configuration is -

For Cs is [Xe} 6s¹ and for S is [Ne] 3s²3p⁴.

Cs have 1 valence electron and S have 6 valence electrons.

Hence to attain a stable electronic configuration, both two Cs atoms lose one electron and form Cs⁺ and these two electrons will be accepted by one S atom to form S²⁻.

Therefore the formula for the compound is Cs₂S as Cs donate 1 electron and S will accept 2 electrons from Cs.

The formula is Cs₂S.

To learn more about electronic configuration, visit: brainly.com/question/15051483

#SPJ4

6 0
2 years ago
How does the energy of the atoms in a hot cup of coffee compare to the energy of the atoms in a piece of ice?
Nonamiya [84]

Answer:

The atoms in the cup of coffee have more energy.

Explanation:

The difference between the hot cup of coffee and the piece of ice is their temperature. The hot cup of coffee has a higher temperature than the ice.

The relationship between the energy and temperature is a direct relationship. This means that higher temperature means higher kinetic energy and vice versa.

Since the hot cup of coffee has  a higher temperature, it means it also have the highest amount of energy. The correct option is;

The atoms in the cup of coffee have more energy.

5 0
4 years ago
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