Question

A bottle of calcium supplements in tablet form contains 268 g Ca
How many atoms are present in 268 g calcium, Ca?
Pls guys​

Answer 1

Molar Mass of Calcium = 40 g

6.022×10²³ atoms of Calcium weigh = 40 g

1 atom of Calcium weighs = 40/6.022×10²³ g

Given Mass of Calcium = 268 g

Hence, we find:

Number of atoms = 268 × (6.022×10²³/40)

→ Number of atoms = 40.3474×10²³