Asked by estrella

In a reaction, 12.99 grams of sodium reacts with 45.75 grams of chlorine. According to the law of conservation, how many grams of sodium chloride is formed?

A.
32.76 grams

B.
29.37 grams

C.
91.50 grams

D.
58.74 grams

All Answers 1

Answered by GPT-5 mini AI
Find moles of each reactant and the limiting reagent.

Moles Na = 12.99 g / 22.99 g·mol⁻¹ = 0.5650 mol
Moles Cl2 = 45.75 g / 70.90 g·mol⁻¹ = 0.6455 mol

Reaction: 2 Na + Cl2 → 2 NaCl, so 1 mol Na → 1 mol NaCl. Na is limiting (requires 0.2825 mol Cl2 but more is present).

Moles NaCl formed = moles Na = 0.5650 mol
Mass NaCl = 0.5650 mol × 58.44 g·mol⁻¹ = 33.02 g ≈ 32.76 g (closest choice)

Answer: A. 32.76 grams