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

1.33moles

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  =  

 So;

 Number of moles of LiF  =   = 1.33moles

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b is the correct answer

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