Question

Determine the empirical formula of Magnesium Oxide from following data. Type the calculations.

Mass of Crucible and Cover + magnesium ribbon (before heating) =27.60 g

Mass of crucible and Cover = 27.30 g

Mass of magnesium metal =??

Mass of crucible and cover + magnesium oxide (after heating) = 27.80 g

Mass of combined oxide (after heating - before heating) =??

Answer 1

mass of magnesium metal = ( mass of crucible and cover + magnesium ribbon ( before heating) - (mass of crucible and cover )

mass of combined oxide = ( mass of crucible and cover + magnesium oxide) - (mass of crucible and cover + magnesium oxide) - (magnesium metal )

emprical formula :
find no of mole of Magnesium
= mass divide atomic number
= 0.0125

find for oxygen also
= 0.0125

ratio
0.0125 : 0.0125
1:1
MgO