Answer
To calculate the number of atoms, molar mass is multiplied with Avogadro's number
(a): 0.0778 x 6.022 x $10^{23}$ = 4.69 x $10^{22}$ atoms
(b): 1.44 x 6.022 x $10^{23}$ = 8.73 x $10^{23}$ atoms
(c): 55.8 x x 6.022 x $10^{23}$ = 3.36 x $10^{24}$ atoms
Work Step by Step
To calculate the number of atoms, molar mass is multiplied with Avogadro's number:
(a): 0.0778 x 6.022 x $10^{23}$ = 4.69 x $10^{22}$ atoms
(b): 1.44 x 6.022 x $10^{23}$ = 8.73 x $10^{23}$ atoms
(c): 55.8 x x 6.022 x $10^{23}$ = 3.36 x $10^{24}$ atoms
