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

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .