please answer question 12 with given information!

Assume your unknown carbonate is a pure compound. Use your mean % carbonate (from calculation 10 , or 11 if you had to do it) and appropriate calculations to decide whether your unknown is more likely to be an alkali metal carbonate or an alkaline earth metal carbonate. (5 marks) 8. Calculate the % carbonate (by mass) in each unknown sample. ( 2 marks) % Carbonate = mabs/mass of Sample y 100 =0.07797g/0.1675=46.5% Titration 2: Titration 3: 9. Calculate the average % carbonate in your unknown. ( 1 mark) Average=3(46.5%+44%+43.5%)=44.6% 10. Calculate the % deviation from the mean for all 3 samples. No need to show sample calculations