Question

calculate the mass of 1.050 5 multiplied 10 ki power 23 molecules of carbon dioxide

Answer 1

Mass of no. Of molecules is the no. Of moles multiplied by the molar mass.

No. Of molecules is the no. Of moles multiplied by Avogadro's no. I.e. NA.

Unit mass is the addition of the atomic mass multiplied by the subscript.