Final answer:
To find the number of moles in 58.9g of Cobalt (Co), you divide by the molar mass, which gives approximately 1 mole. For 118g, you get approximately 2 moles. To find the number of atoms, multiply the number of moles by Avogadro's number, resulting in 6.022 × 1023 atoms for 58.9g and 1.2044 × 1024 atoms for 118g.
Step-by-step explanation:
To calculate the number of moles and atoms in 58.9g or 118g of Cobalt (Co), we use the molar mass of Co, which is approximately 58.93 g/mol. For 58.9g of Co, the calculation is simple because it's essentially one mole:
58.9 g Co × (1 mol Co/58.93 g Co) = 1 mol Co
For 118g of Co:
118 g Co × (1 mol Co/58.93 g Co) = 2 moles Co
To find the number of atoms, we multiply the moles by Avogadro's number (6.022 × 1023 atoms/mol).
For 58.9g of Co:
1 mol Co × (6.022 × 1023 atoms/mol) = 6.022 × 1023 atoms
For 118g of Co:
2 moles Co × (6.022 × 1023 atoms/mol) = 1.2044 × 1024 atoms