Answer:
A and C represent elements while B and D represent Compounds
Explanation:
chemical elements cannot be broken down into simpler substances by any chemical reaction. While A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds
The answer is 1815.15 mm hg
The coorect answer would be A
In a neutral compound, the charges must balance, the net
charge should be zero.
Since the charge of Fe is 3+ and that of O is 2-, therefore,
there should be 2 Fe 3+ ions per 3 O2- ions in order to have a net charge of
zero.
