Which formula represents an empirical formula
O (1) CH,2
(2) C, H,
(3) CuH
O (4) CH

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Compare and contrast physical changes with chemical changes.