Be(NO3)2 Determine what the coefficient will be to have 30 Oxygen (O) atoms.
Then, count how many atoms are in the new chemical formula.
Ве:
N:
O :

Must be negative.substance increases

Answer246 k;

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. polyethylene is a plastic material called thermoplastic. one very useful property of thermoplastic is that when it is heated it turns into liquid, which can be molded into desired shape and size. also the material do not dissolve at room temperature.