Question

How many moles of LiF are present in 34.58 g?

O 0.3998 mol
O 1.333 mol
2.500 mol
36.32 mol

Answer 1

1.33moles

Step-by-step explanation:

Given parameters:

Mass of LiF = 34.58g

Unknown:

Number of moles of LiF = ?

Solution:

To solve this problem, we need to find the molar mass of LiF first.

Molar mass of LiF = 7 + 19 = 26g/mol

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

So;

Number of moles of LiF =
`(34.58)/(26)` = 1.33moles