12. Balance the following chemical equations and classify the reactions as combination, decomposition, single replacement, or double replacement reactions (8 points, 2 each) (b) Fe + O2 â Fed, (d) Kio, â KI + 02 grams of a compound containing only tin and oxygen (aw-16). a. What is the weight of the oxygen in the unknown compound?(3 points) 13. An 11.87 gram sample of tin (Sn AW 118.7) was oxidized completely to give 15.07 b. How many moles of oxygen atoms (AW-16) are in this compound? (3 points) c. How many moles of tin are in this compound? (3 points) d. What is the chemical formula of this oxide of tin (3 points) cooled form 100 C to o C what would be 14. If a 200 mL of a gas at constant pressure were the new volume? (10 points)