Answer:When a substance undergoes a chemical change some of the chemical changes can be reversed with a chemical change.
Explanation:
A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.
<u>Explanation:</u>
There are 3 states of matter:
<u>Solid state:</u> In this state of matter, the particles are closely packed and they do not have any space between them. Thus, this state of matter has the highest intermolecular forces of attraction between them.
The kinetic energy of the solid particles is the least.
<u>Liquid state:</u> In this state of matter, the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. The intermolecular forces between the particles are less as compared to the solid state.
The kinetic energy of the liquid particles lie in the intermediate of solid and gases.
<u>Gaseous state:</u> In this state, the particles are loosely arranged and have a lot of space between them. Thus, this state of matter has the lowest intermolecular forces of attraction between them.
The kinetic energy of the gaseous particles is the highest.
- <u>Conversion of solid to liquid:</u>
The spacing between the particles increases and so does the kinetic energy. The particles which were closely packed, on getting converted to liquid particles are now present in random and irregular pattern.
- <u>Conversion of liquid to gas:</u>
The spacing between the particles increases and so does the kinetic energy. The particles which were present in irregular pattern, on getting converted to gas particles are now loosely arranged.
The coefficient of O2 is 19 since their are 38 oxygen atoms on the product side and each O2 molecule has 2 atoms. 38/2=19
Answer:
yes
Explanation:
neutrons give neutral charge, if the amount if protons and electrons are equal then they would cancel each other out and the atom would be neutral charged.