You're asking how many grams are in a mole of Li₂O. Here's how to calculate that:

1. Find the molar mass of Li₂O

* Lithium (Li): 6.941 g/mol (from the periodic table)

* Oxygen (O): 15.9994 g/mol (from the periodic table)

* Li₂O: (2 * 6.941 g/mol) + 15.9994 g/mol = 29.8814 g/mol

2. Grams in one mole of Li₂O

Since the molar mass of Li₂O is 29.8814 g/mol, there are 29.8814 grams in one mole of Li₂O.