A coating of cobalt that is 0.005cm thick is deposited on a plate that is 0.5cm^2 in total area. How many atoms of cobalt are deposited in a plate? (given density of cobalt = 8.9g cm ^-3 , atomic mass of Co = 59 amu)

Asked by Diya | 26th Apr, 2018, 01:48: AM

Expert Answer:

Thickness= 0.005 cm
Area =0.5 cm2
Density of Co = 8.9gcm-3
Molar mass of Co = 59 
Therefore, 2.27×1020 atoms of cobalt are deposited on a plate.

Answered by Varsha | 26th Apr, 2018, 12:36: PM