I'm on a ridiculous pace for completing a year's worth of Chemistry... I have two weeks left to finish over a semester's worth, so I'm struggling to learn all the concepts thoroughly and get decent grades. And so I keep getting stuck on problems. This problem is really giving me a headache: From the equation 2 NaHCO3 --> Na2CO3 + CO2 + H2O, how many liters of CO2 at STP will be produced by 8.4 g NaHCO3? a. 1.21 L b. 1.12 L c. 12.1 L d. 11.2 L I believe the first lengthy equation, "2 NaHCO3 etc." is extraneous. The next steps that I've taken are calculating the total gram mass of NaHCO3, 84 grams, meaning 8.4 grams is 1/10 of NaHCO3. If this is so, I'm figuring there will be 1/10 as many grams of CO2, meaning 44 grams of CO2. 44 grams to liters is, at a conversion factor of 1000 grams per liter, .044 liters... I'm obviously way off, but I'm clueless as to what else I'm supposed to be doing. I can't find any similar problems in all the other practice problems in my textbook or syllabus to give me a clue. I'm homeschooled, so no teachers to talk to. Help?