Can someone do this for me i fr didn't understand a thing in science class if done correctly u get 10p+:)

Given the table below, what is the chemical formula for a compound between rb and the nitrate ion no3 -1? nitrate ion no3 -1 phosphate po4 -3 sulfate so4 -2 acetate c2h3o2 -1 ammonium nh4 +1 chromate cro4 -2 carbonate co3 -2 dichromate cr2o7 -2 permanganate mno4 -1 sulfite so3 -2 rbno3 rb2no3 rb(no3)2 rb2(no3)3

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

What does the symbol (–hfus) indicate in a phase change?