Question

100.00g of MgCl2 is weighed out for an experiment; how many moles does this comprise?

Answer 1

1.05mol

Step-by-step explanation:

Given parameters:

Mass of MgCl₂ = 100g

Unknown:

Number of moles = ?

Solution:

The number of moles in a compound can be derived using the expression below:

Number of moles =
`(mass)/(molar mass)`

Molar mass of MgCl₂ = 24 + 2(35.5) = 95g/mol

So',

Number of moles =
`(100)/(95)` = 1.05mol