Question

Calculate the no.Of potassium ions present in 7.45 g of potassium oxide

Answer 1

Answer:

=> Number of moles of K2O in given sample = Total mass/molar mass

= 7.45/(39 + 39 + 16)

= 7.45/94

=> Number of molecules = Number of moles x Avogadro's Number

= (7.45/94) x N

=> Number of ions = Number of molecules x 3

= (7.45/94) x N x 3

Explanation: