The mass of a single platinum atom is 3.24×10-22 grams. How many platinum atoms would there be in 274 milligrams of platinum?

Determine the mass in grams of 7.94 × 10²¹ atoms of zinc. (The mass of one mole of zinc is 65.39 g.)

Determine the mass in grams of 8.85 × 1023 atoms of zinc. ( The mass of one mole of zinc is 65.39g.)

A one carat diamond which is made of the element carbon, weighs 0.200 grams. The average mass of a carbon atom is 12.0 atomic mass units(Amu). If 1 amu= 1.661*10^-24 grams, how many carbon atoms are present in a one carat diamond?

Determine the mass in grams of 8.71 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01 g.)

The mass of a single nickel atom is 9.75×10-23 grams. How many nickel atoms would there be in 182 milligrams of nickel? atoms

The mass of a single copper atom is 1.06×10-22 grams. How many copper atoms would there be in 177 milligrams of copper?atoms

What is the mass in grams of 7.33 x 1023 atoms of lead?   How many lead atoms are there in 20.1 grams of lead?

Determine the mass in grams of 8.14 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55 g.)

What is the mass in grams of 3.61 x10^23 atoms of copper?     How many copper atoms are there in 24.0 grams of copper?