3. A mixture of the two substances below was spotted on a TLC plate and eluted with acetone. After developing the plate only one spot was observed, with Rf value of 0.95. What went wrong, and what would you change to obtain a better separation of the components of this mixture?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

An experimental procedure requires a 10 ml of acid to be dissolved

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.