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Which one represents the correct sum of the following reactions?
3 CH
2 NII,
2 N2O
N,
3 CO, + 4 NH
3 H,
A2 Co, + 2 110 CH + 30,
(B 3 C + 2 NO + 2 NHỊ ) 3 CON + 4 NHI
( C ) 3 CH4 + 2NO + 3 CO + 4 NHI
(D) 3 CH + 2 NaOH -> 3 CO + 2 NH4 + N + 3 H

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).

can you attach the

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.