Question

2ag(s) + i₂(s) → 2agi(s)
what is the correct ratio of particles of the substances in the chemical equation?
2 moles ag : 1 mole i₂ : 2 moles agi
2 atoms ag : 1 molecule i₂ : 2 formula units agi
1 atom ag : 1 molecule i₂ : 2 molecules agi
2 molecules ag : 1 molecule i₂ : 2 molecules agi

Explanation:

Step1: Analyze the chemical formula of substances

• \(Ag\) is an atomic substance, so it is represented by atoms.
• \(I_{2}\) is a molecular substance (\(I_{2}\) molecule), so it is represented by molecules.
• \(AgI\) is an ionic compound, so it is represented by formula units.

Step2: Check the stoichiometric coefficients in the chemical equation

The balanced chemical equation is \(2Ag(s)+I_{2}(s)\to 2AgI(s)\). The stoichiometric coefficients are \(2\) for \(Ag\), \(1\) for \(I_{2}\), and \(2\) for \(AgI\).

Answer:

2 atoms \(Ag\): 1 molecule \(I_{2}\): 2 formula units \(AgI\)