Find the mass (grams) in 2.60 mol of lithium?

To calculate the number of mass, we use this formula

Number of mole = mass / molar mass

Since we are given the number of mole

Number of mole = 2.60mol

Mass = ? g

Molar mass of Li = 6.941g/mol

2.60mol = mass / 6.941 g/mol

Mass = 2.60 * 6.941

= 18.0466g

Therefore, the number of mass is 18.0466g