Is mixing NaoH and (Cu(No3)2) chemical reaction or physical be detailed and use scientific information

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

what are the two models

explanation:

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer