Samantha & ryan are investigating an unknown substance. they make the following observations about the substance: 1. it is black 2. it has a dull luster 3. it weighs 6.50 g 4. it is solid 5. it is roughly 2 inches long 6. it does not conduct electricity 7. it takes up a volume of 2.00 ml 8. it has a density of 3.25 g/ml some of these properties will change if more sample were added to their observations. some will stay the same. which properties will change? choose the numbers a) 1,2,3,8 b) 3,5,7,8 c) 3,5,7 eliminate d) 3,6,8

The answer is C). If more sample were added, it would become longer than 2 inches, it would be heavier and weigh more, and because there is more it would take up more volume. However the density would not change as density is m/V and if it is the same sample mass and volume would increase at the same rate.

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.

It's called the falling actionwrong subject by the way