Question

You obtain a sample of lithium flouride with a mas of 100 g. How many moles of lithium flouride are there in the sample.

Answer 1

`\huge{ \boxed{3.86 \: mol}}`

Step-by-step explanation:

The number of moles of the lithium fluoride sample LiF can be found by using the formula:

`n = (m)/(M)`

where:

m is the mass in grams

M is the molar mass in g/mol

n is the number of moles

From the question:

m = 100 g

Molar mass (M) of LiF = 25.94 g/mol

`\therefore \: n = (100)/(25.94) \\ = 3.86 \: mol`