Question

A. what is difference between
1. A molecule and an atom?
2. A solid and a gas?
3. glycerine in water and kerosene in water?
4. A bottle of soda and a bottle of water?
5. A physical change and a chemical change?
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Answer 1

Answer:

1.According to science atom is the smallest unit of an element that can or cannot exist freely. While on the other hand, a molecule is a set of atoms that are held together with the help of a bond and is the smallest unit of a compound. ... Moreover, an atom contains a nucleus (made up of neutrons and protons) and electrons.

2.Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

3.kerosene is a miscible liquid whereas glycerine is not a miscible liquid

4.The liquid in the soda bottle is under high pressure. When you open the bottle, the dissolved carbon dioxide is depressurized and wants to rapidly expand. Thus effervescence is seen when a bottle of soda is opened.

5.In a nutshell, a chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced

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