1. A sample of aluminum, Al, weighing 0.254 gm was oxidized, giving 0.480 gm
of the oxide. Calculate the empirical formula of aluminum oxide from this data.
(Use, at.wt. of Al=26.98 gm/mole, at.wt. of O=16.00 gm/mole)
(You must show all steps of the calculations, with units)

2. Write a balanced chemical reaction showing the reaction of aluminum
with oxygen to give aluminum oxide.

3. Write a balanced chemical reaction showing the reaction of carbon with oxygen gas
to give carbon dioxide gas. How many grams of oxygen are needed to react completely
with 0.234 gm of carbon?

4. A sample of 0.234 gm of carbon is placed in a closed stainless steel bomb
with 0.502 gm of oxygen gas, O2. The mixture is ignited and the carbon reacts
to give carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?

5. Write balanced chemical equations for all the reactions involved in
the Mg empirical formula experiment.