chloride i think
AS + CL2-----> ASCL
Forms an ion. e.g if chlorine loses an electron it will go form Cl2 ---> cl2+
Single replacement. The F2 replaces Cl to form HF and Cl2.
It would produce Barium oxide (BaO) and Chlorine gas (Cl2) BaCl2 + O2 --> BaO + Cl2
Yes. Gasses can dissolve in water.
It is equal to zero. In pure elemental form.
Cl, chlorine is an element, Cl2 is the molecular form of the element. When 'free' chlorine is so reactive that it will react with itself to form diatomic (2 atoms) molecules, but it is still an element.
Cl2 (properly written the 2 would be a subscript - but that's tough to do here) represents a diatomic molecule of chlorine. At standard conditions, this is the form pure chlorine takes.
They form the diatomic Chlorine molecule Cl2
2KBr + Cl2 ----> 2KCl + Br2
Balanced equation for Sodium and Chlorine is: 2Na + Cl2 --> 2NaCl