Answer: C
Explanation: This is because of a nice thing called guessing
Covalent bonding is when electrons are shared between atoms.
You should never heat chemicals in a closed system (closed bottle or flask) because it might explode.
The answer for The question is (D)The density changed
Answer:
The AH+ for Br2() is 0 kJ/mol.
The AH+ for Hg() is 0 kJ/mol.
The AH; for N261) is 0 kJ/mol.
Explanation: