Question

8. What is the mass of copper in a sample of copper(I) chloride weighing 6.93 g ?*

Answer 1

4.5g

Step-by-step explanation:

Given parameters:

Mass of copper(i)chloride = 6.93g

Unknown:

Mass of copper = ?

Solution:

Formula of the compound = CuCl

atomic mass of Cu = 63.6g/mol, atomic mass of Cl = 35.5g/mol

Molecular mass = 63.6 + 35.5 = 99.1g/mol

So,

The mass of copper =
`(63.6)/(99.1)` x 6.93 = 4.5g