Answer:
4.96 x 10²²atoms
Explanation:
Given parameters
Mass of Ba = 11.3g
Unknown:
Number of atoms = ?
Solution:
To solve this problem, we need to find the number of moles of Ba first and then the number of atoms it contains.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Ba = 137.3g/mol
Number of moles = [tex]\frac{11.3}{137.3}[/tex] = 0.08mole
1 mole of a substance contains 6.02 x 10²³ atoms
0.08 mole of Ba will contain 0.08 x 6.02 x 10²³ atoms = 4.96 x 10²²atoms
