How many formula units are in 35.5 mol carbon dioxide?

Answer 1

Not trying to be rude, if it is a covalent compound like Carbon dioxide we should not use the word formula units, we should rather use molecules because the formula units should be used only incase of Ionic compounds. Assuming you were asking for the molecules the answer would be

Just multiply with the Avogadro number

35.5 X (6.02 X 10 ²³) = 2.14 X 10 ²⁴