Question

part 1 of 3
find the mass of 2.99 mol cl₂.
answer in units of g. answer in units of g.

1. 195.25
2. 240.69
3. 129.22
4. 243.53
5. 144.13
6. 175.37
7. 137.03
8. 212.29
9. 167.56
10. 198.09

Explanation:

Step1: Find molar mass of Cl₂

Molar mass of Cl is 35.45 g/mol, so for Cl₂, it's \(2\times35.45 = 70.90\) g/mol.

Step2: Calculate mass using \(m = n\times M\)

Given \(n = 2.99\) mol, \(M = 70.90\) g/mol.
\(m = 2.99\times70.90 = 2.99\times70.9\)
\(2.99\times70.9 = (3 - 0.01)\times70.9 = 3\times70.9 - 0.01\times70.9 = 212.7 - 0.709 = 211.991\approx212.29\) (considering possible rounding in molar mass).

Answer:

1. 212.29