A sample of sodium reacts completely with 0.355 kg of chlorine, forming 585 g of sodium chloride. What mass of sodium reacted?

The mass of sodium that reacted is 230 grams

Explanation:

The balance equation of the reaction is first written.

sodium = Na

Chlorine = Cl2

sodium chloride = NaCl

2Na + Cl2 → 2NaCl

from the balance equation we calculate the molar mass involve in the reaction

Molar mass of sodium from the equation = 23 (2) = 46 g

molar mass of sodium chloride from the eqaution = 23 * 2 + 35.5 * 2 = 46 + 71 = 117 g

If 46g of sodium is in 117 g of sodium chloride

? gram will be in 585 g of sodium chloride

cross multiply

46 * 585/117 = 26910/117 = 230 g

The mass of sodium that reacted is 230 grams