Asked by For St Joseph School,Imphal,Sagaiprou

Calculate the number of potassium ions present in 7.45g of potassium oxide (atomic mass of K=39u)?
Answered by bobpursley
K2O potassium oxide
moles K2O=mass/formula mass= 7.45/(2*39+16)=.079moles
number K ions= 2*.079*avagradros number