Answer:
8.386 × 10^-23 moles
Explanation:
We are given;
- Number of atoms of Ba is 50.5 atoms
We are required to determine the number of moles
- We need to know that 1 mole of an element contains atoms equivalent to the Avogadro's number, 6.022 × 10^23.
- Therefore, 1 mole of an element contains 6.022 × 10^23 atoms
In this case;
1 mole of Ba contains 6.022 × 10^23 atoms
Number of moles = 50.5 atoms ÷ 6.022 × 10^23 atoms
= 8.386 × 10^-23 moles
The number of moles in 50.5 atoms of Ba is 8.386 × 10^-23 moles
