You hold a handful of rocks and a handful of feathers. The rocks feel heavier than
the feathers, even though you hold the same amount of both. Which of the following is true?
a) The rocks have more mass, and therefore contain more matter, than the
feathers.
b) The feathers have more mass, and therefore contain more matter, than the
rocks.
c) The rocks and feathers have the same mass.
d) The rocks and feathers have the same amount of matter.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

The metal is named first