In a chemical equation, which symbol should be used to indicate that a substance is in solution?
(s)
(g)

(ag)

 In a chemical equation, (aq) should be used to indicate that a substance is in solution.

Explanation:

The chemical reaction is represented by putting the reactants at left side of the arrow and products on the right side of the arrow.  The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The liquids are designated  by symbol (l) and gases are designated  by symbol (g).

In a chemical equation, (aq) should be used to indicate that a substance is in solution.

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

answer: c.

explanation: