So the quation is asking for the grams of the element Lithium.
We are given the number of moles of Li which is 0.325 mol
To calculate the mass, we need to use the following equation:
n=m/M where n is the number of moles, m is the mass and M is the molar mass of Li.
Now re-arrange this equation:
m= n x M
= 0.325 mol x 6.94
= 2.26 g