Question

which of the following is a possible way to describe the components in the reaction below?
2ag(s) + i₂(s) → 2agi(s)
hint: all components must be of the same scale, pairing moles with moles and particles with particles.
2 atoms ag : 1 molecule i₂ : 2 formula units agi
2 moles ag : 1 molecule i₂ : 2 formula units agi
2 atoms ag : 1 mole i₂ : 2 moles agi
2 moles ag : 1 mole i₂ : 2 formula units agi

Explanation:

Step1: Check the scale of components

According to the hint, all components must be of the same scale. In the first option, \(2\) atoms \(Ag\) (particle scale), \(1\) molecule \(I_{2}\) (particle scale), \(2\) formula units \(AgI\) (particle scale).

Step2: Analyze other options

• Second option: \(2\) moles \(Ag\) (mole scale) vs \(1\) molecule \(I_{2}\) (particle scale) - different scales.
• Third option: \(2\) atoms \(Ag\) (particle scale) vs \(1\) mole \(I_{2}\) (mole scale) - different scales.
• Fourth option: \(2\) moles \(Ag\) (mole scale) vs \(2\) formula units \(AgI\) (particle scale) - different scales.

Answer:

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