Sodium reacts with chlorine gas to form sodium chloride. what mass of sodium chloride is produced if 92.0 g sodium reacts with excess chlorine?

234 g

Explanation:

We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.

M_r:      22.99                58.44

              2Na  +  Cl₂ ⟶ 2NaCl

Mass/g: 92.0

1. Calculate the moles of Na

Moles Na = 92.0 × 1/22.99

Moles Na = 4.002 mol Na

2. Calculate the moles of NaCl

The molar ratio is 2 mol NaCl:2 mol Na.

Moles of NaCl = 4.002 × 2/2

Moles of NaCl = 4.002 mol NaCl

3. Calculate the mass of NaCl

Mass of NaCl = 4.002 × 58.44

Mass of NaCl = 234 g

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