Question

plz answer this questions

Answer 1

9......no. of moles = molar mass/ given mass

       therefore, no. of moles = 23/ 4.6

                 no. of moles = 5 mol

10......

A polyatomic ion is an ion made up of two or more no. of atoms

        Examples: The hydroxide cation (OH-)

                   phosphate cation (PO43-)