Consider the reaction below. If 8.75 g of CH4 reacts with 18.95 g of O2 and 6.85 g of H2O is collected, what is the percent yield of H2O? Show clear work. [Atomic masses: C = 12.01 g, H = 1.008 g, O = 16.00 g] CH4 + O2 _ CO2 + H2O (unbalanced).

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.

Which metals are called noble metals