Calculate the number of copper atoms in 0.3175g of copper

A 0.005 cm thick coating of copper is deposited on a plate of 0.5 m^(2) total area. Calculate the number of copper atoms deposited on the plate (density of copper = 7.2 g cm^(-3) , atomic mass = 63.5).

Calculate the number of atoms in (a) 4.5 g atoms of potassium (b) 0.2 g atoms of chlorine (c ) 1.2 g molecules of nitrogen

Atomic number of copper is:

Calculate the molar mass of copper sulphate.

Assume that each of copper atom has one free electron. Estimate the number of free electrons in 1 mg of copper. Given that atomic weight of copper =63.5 and Avogadro number =6.02xx10^(23) . What is the charge possessed by these free electrons?

A steady current of 10.0 A is maintained in a copper voltameter . Calculate the time required to deposit 2.5 g of copper . Relative atomic mass of copper = 63.5 g .

During the electrolysis process 4 A electric current flows through a copper sulphate solution for 5 minutes. Determine the number of copper atoms deposited at the cathode.