How many moles and atoms of gold are present in 49-25 g of gold? (Atomic mass of gold=97u)

A gold sample contains 90% of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?

A gold sample contains 90% of gold and the rest copper. How many atoms of gold are present in one gram of this sample of gold?

Calculate the number of gold atoms in 300 mg of a gold ring of 20 carat gold (atomic mass of gold = 197, pure gold is 24 carat).

Gold crystallizes in the face centred cubic lattice. Calculate the approximate number of unit cells in 2 mg of gold. (Atomic mass of gold= 197u).

Gold cystallises in the face cubic lattice. Calculate the approximate number of unit cells in 2 mg of gold. (atomic mass of gold=197u).

Metallic gold crystallizes in the face centered cubic lattice. What is the approximate number of unit cells in 2.0 g of gold ? (Atomic mass of gold is 197 amu)