Question

There are _______ oxygen ions in 1 mole of Na2O.

A. 6.0 x 10^23 O2 ions
B. 1.2 x 10^24 O2 ions
C. 3.0 x 10^23 ions
D. None of these

Answer 1

Did you see my response to the question yesterday about the pH 9.05 and the answer was 0.298 but the data base rejected it. My response to day was that I obtained 0.299M. If you used 4.2E-10 for Kb, then you are allowed only two significant figures in the answer and I would round it to 0.30. Let me know how that comes out.

There are 6.02E23 molecules in a mole of anything. There is 1 mol O ions in 1 mol Na2O.