NEED HELP ASP Of the following compounds:

1. gold
2. mercury
3. Ag
4. W
5. Li
6. Be
7. nickel
8. oxygen

When involved in an ionic compound the elements which have multiple charges and therefore must be indicated in Roman numerals (in ascending order) are:

(Example: metal (V) non- metal)

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).