Empty crucible and lid
Crucible, lid and Mg
Crucible, lid, and combustion product
42.39g
42.66g
0419 Mo
42.39-41.98
1. (2 pts) Determine the mass of the magnesium used.
Directions: Show all work in the space provided and write your answers on the lines with correct
significant figures and units! Using the data below please perform the following calculations:
Mass:
41.98g
0.00168 mil Ma
2. (2 pts) Determine the number of moles of magnesium used.
0.410Mg
24 3glnel
3. (2 pts) Determine the mass of magnesium oxide formed.
0.41g Mg
0.0256g Mg0
0.0072150
10 g
0.0184 -0.0256
4. (2 pts) Determine the mass of oxygen that combined with the magnesium.
5. (2 pts) Calculate the number of moles of oxygen atoms that were used.
= 1 My
07. For 60
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6. (2 pts) Calculate the ratio between moles of magnesium used and moles of oxygen used.
ON mil Ma
0.0184 m My
0.0073
O(£។
7. (2 pts) Based on your experimental data, write the empirical formula for magnesium oxide.
1
8. (2 pts) Calculate the percent error in your determination of the magnesium: oxygen mole ratio,
using 1.00 as the accepted value.