A sample of iron metal is described as being $2\mathrm{.}35$molFe. How many iron atoms are present in this sample.

How many atoms of gold are present in $5\mathrm{.}07{10}^{-3}$mol.

How many lead$-206$ atoms are present in $8\mathrm{.}27{10}^{-3}$molPb.

How many mass of sulfur are present in a sample containing $6\mathrm{.}65{10}^{22}$ atoms? What is the mass of this sample?

What is the mass of $2\mathrm{.}35{10}^{24}$ atoms of $Cu?$

How many He atoms are present in a $22\mathrm{.}6g$ of sample of he gas?