What is the mass of 6.40 moles of copper(II)chloride (CuCl2)?

860. g CuCl₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

[Given] 6.40 mol CuCl₂

[Solve] g CuCl₂

Step 2: Identify Conversions

[PT] Molar Mass of Cu: 63.55 g/mol

[PT] Molar Mass of Cl: 35.45 g/mol

Molar Mass of CuCl₂: 63.55 + 2(35.45) = 134.45 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

860.48 g CuCl₂ ≈ 860. g CuCl₂

1. they vary with a higher number because boiling is way hotter than melting