State two features that are shown by all molecules

characteristics of molecules are:

1. Molecules have definite size and mass.

2. Molecules have space between them.  

3. Molecules are in constant random motion.

4. A molecule has only one configuration

5. The mass is equal to sum of masses of all individual atoms in molecular structure

If correct please give brainliest

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All the molecules have definate size and definate mass, According to their function. :D