Question

Empirical Formula of Magnesium Oxide Compound Group Data: For these calculations, obtain the data shown on the previous page for two other groups. Make calculations here using your data and the data from the two other groups. Average Moles of Magnesium (mol) O. 0181 O.0025 Standard Deviation in Moles of Magnesium (mol) Average Moles of Oxygen (mol) rolo2 O. 00683 3:2 Standard Deviation in Moles of Oxygen (mol) Mole Ratio of Magnesium to Oxygen Calculations (Show all calculations used to produce the above data here.) I. Calculate the mass of oxygen from the total mass of the magnesium oxide compound formed. 74 O.SIS L Mess Ox ngin Calculate the mole ratio of the magnesium to oxygen: 2. meteso 1 Calculate the empirical formula for the magnesium oxide compound: 3. Calculate the standard deviation in the class measurements for the magnesium and oxygen: 4. 018 0LL 02 0.0184 3 3 On-60114 Ok-0.0 ionl-e. 3-1 eui-0.01.e1401 Lo. aly-0.0102 78 Empirical Formula of Magneslum Oxide 2O.002S 3-13010065

How do I calculate the emperical formula for the magnesium oxide compound?

Answer 1

Solution: Empirical formula = Mg3O2

Calculation:

Since, mol ratio of magnesium to oxygen is 1.5.

It means oxide contains 1 mol of oxygen and 1.5 mol of Mg.

Thus, it can be written as,

Mg(1.5) O(1)

For conversion into whole numbers, we must multiply by 2,

Thus, empirical formula becomes as,

Mg3O2