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boyakko [2]
2 years ago
11

Explain how particles move before during and after melting

Chemistry
2 answers:
kirill115 [55]2 years ago
6 0

Answer:

(What happens to particles during melting?)

When a solid is heated the particles gain energy and start to vibrate faster and faster the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid The particles in the liquid are the same as in the solid but they have more energy

(particles after melting after melting?)

during melting, the particles start to move about staying close to their neighbouring particles then move more freely

Explanation:

Aleksandr-060686 [28]2 years ago
3 0

Answer:

Particles would move more freely, while still staying close together depending on the shape of the liquid

Explanation:

Melting is the process of going from a solid to a liquid due to the increase in heat/energy. This increase in heat/energy increases the speed at which the atoms within the object moves. Lets say we had an ice cube. While it is a cube, the particles inside the cube are slow and compact, staying close together.

When enough energy is gained, this makes the particles begin to move faster, gaining heat and energy which results in the ice cube melting and moving more freely than normal.

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A chemist dissolves 614. mg of pure hydrochloric acid in enough water to make up 400 mL of solution. Calculate the pH of the sol
tatuchka [14]

Answer:

The pH of the solution is 1.38.

Explanation:

Mass of HCl = 614 mg = 0.614 g

Moles of HCl = \frac{0.614 g}{36.5 g/ mol}=0.01682 mol

Concentration of HCl :

Concentration =\frac{Moles}{\text{Volume of solution in L}}

On adding 0.01682 moles to 400 mL of water that 0.4 L of water.

[HCl]=\frac{0.01682 mol}{0.4 L}=0.04205 M

HCl(s)+H_2O(l)\rightarrow H_3O^+(aq)+Cl^-(aq)

1 mole of HCl gives 1 mole of hydronium ion and 1 mole of chloride ions in an aqueous solution.

Then 0.04205 mol/L of HCl will give:

1\times 0.04205 M =0.04205 mol/L of hydronium ions.

[H_3O^+]=0.04205 M

pH=-\log [H_3O^+]

pH=-\log [0.04205 M]=1.38

The pH of the solution is 1.38.

7 0
3 years ago
. If you constructed graphs, what trends do they indicate in your data?
klasskru [66]

Answer:

A linear pattern is a continuous decrease or increase in numbers over time. On a graph, this data appears as a straight line angled diagonally up or down (the angle may be steep or shallow). So the trend either can be upward or downward.

Explanation:

7 0
3 years ago
- What is the concentration of hydrogen ions if the pH is 12?
ELEN [110]

Answer:

1 x 10^-12 mol dm^-3

Explanation:

[H+] = 10 ^ -pH

Therefore, pH 12 = 1 x 10^-12 hydrogen ion concentration

4 0
3 years ago
An element with a mass number of 11 and an atomic number of 5 has how many<br> neutrons?
Goryan [66]

Answer:

6 neutrons

Explanation:

6 neutrons

Boron having an atomic number of 5 means that it will have 5 protons. 11 atomic mass units in total. Neutrons also have a atomic mass unit of 1. So there are 6 neutrons

7 0
3 years ago
What 2 instruments are commonly used to measure air pressure?
levacccp [35]
<span>I think it is the barometer and aneroid barometer</span>
8 0
3 years ago
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