# Problems 3. The diagram labeled “Before Reaction" depicts a mixture of S and O2 (molecules in...

###### Question:

Problems 3. The diagram labeled “Before Reaction" depicts a mixture of S and O2 (molecules in a closed container a. Draw a diagram that depicts the results after the mixture reacts as completely as possible according to the equation: 2S + 302 → 2803. Note that matter should be conserved – there should be the same number of sulfur atoms (squares) and oxygen atoms (circles) present after the reaction as there was before. Before Reaction After Reaction b. From the starting quantities shown in the depiction, which reactant, S or 02, was consumed completely? c. Which reactant was left over "i.e., in excess"? 4. Corundum, the mineral that forms rubies and sapphires, has a chemical formula of Al2O3. a. How many oxygen atoms are there in 5.00 x 1010 molecules of corundum? b. How many aluminum atoms are there is 7.00 moles of corundum?

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