Since everyone is doing a fabulous job on the homework. I thought it would be fun to review balancing chemical equations. For these problems, balance the equation first then do the stoichiometry as described in the question.
7:30PM - A student notified me that several answers in the key were incorrect. Thank you. I have updated the key and they are all correct now! If you ever think you got it but the answer doesn't match - double check your work and then send me a message I'll double check. Stick to your guns if you are confident in your knowledge!