describe how you would make a 2.5L solution of pb(NO3)2 with a concentration of 0.45 M. support your description with calculations.​

answer; economic order quantity;

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

b. is the answer hoped i