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Lilit [14]
3 years ago
14

Melting occurs when the particles in a solid ________.please help!!​

Chemistry
1 answer:
Rzqust [24]3 years ago
6 0

Answer:

Vibrate?

Explanation:

In a solid the strong attractions between the particles hold them tightly packed together. Even though they are vibrating this is not enough to disrupt the structure. When a solid is heated the particles gain energy and start to vibrate faster and faster.

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(a) Given that density is usually expressed in the units of g/cm3
Lena [83]

Answer:

0.690g/cm^3

Explanation:

•Mass: <em>2.331g</em>

•Volume: 3.375 cm^3

One side is 1.5cm.

1.5^3

<em>3.375cm^3</em>

•Density: Mass/Volume

Mass = 2.331g

Volume = 3.375cm^3

2.331g/3.375cm^3

0.690g/cm^3

<h2>Density: 0.690g/cm^3</h2>

8 0
3 years ago
What is a solute?
rusak2 [61]

the answer is because when you research that would be the answer

8 0
3 years ago
Anh measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18 degrees celsius.
Hitman42 [59]

As the temperature increases, B) the molecules started moving faster.

Explanation:

The temperature of a substance is a measure of the average kinetic energy of the particles in a substance. In particular, it can be found that the temperature is directly proportional to the average kinetic energy of the particles:

T\propto KE

The kinetic energy of a particle is given by

KE=\frac{1}{2}mv^2

where

m is the mass of the particle

v is its speed

This means that the higher the temperature of a substance, the greater the speed of the particles in the substance.

Therefore, if we apply this concept to this problem, we infer that as the temperature of the water in the pond gets higher, the speed of the molecules inside the water increases, which means that the molecules are moving faster.

Therefore, the correct answer is

B) the molecules started moving faster.

Learn more about temperature:

brainly.com/question/1603430

brainly.com/question/4370740

#LearnwithBrainly

3 0
4 years ago
Which reaction is endothermic
anyanavicka [17]
The second one is endothermic as endothermic reactions require energy for the reaction to take place.
4 0
4 years ago
Potassium hydroxide, KOH, is considered a _____________ in an acid-base reaction because it ___________ a hydrogen ion to/from t
soldi70 [24.7K]
<span>Answer: Potassium hydroxide, KOH, is considered a BASE in an acid-base reaction because it ACCEPTS a hydrogen ion from the other reactant.

According to </span><span>Brønsted–Lowry acid–base theory, Base is a specie which accepts proton (H</span>⁺) while, Acid is a specie which donate proton.

Bases may contain a negative charge or lone pair of electrons, while, Acids contain positive charge or a neutral atom with incomplete octet.

In given statement KOH is acting as a base because it contains a negatively charged hydroxyl group which can accept proton from a acid, i.e. 

                                    KOH    →     K⁺  +  OH⁻

Reaction of OH⁻ with any acid,

                         K⁺    +   OH⁻  +   HCl      →       H₂O   +   KCl
6 0
3 years ago
Read 2 more answers
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