Question

1. What is the mass of 2.65×1023 atoms of lithium? grams

Answer 1

Answer: 3.05 grams

Step-by-step explanation:

To find the mass in grams, we need to use Avogadro's number and the molar mass of lithium.

Avogadro's number: 6.022×10²³ atoms/mol

Molar mass: 6.94 g/mol

`2.65*10^2^3 atoms*(mol)/(6.022*10^2^3 atoms) *(6.94g)/(mol) =3.05 g`