Question

MgCl2(s) → Mg2+(aq) + 2Cl^-(aq)

How many total ions?

2.0 x 10^5 N2O3
How many total atoms?
How many nitrogen atoms and oxygen atoms?

Answer 1

1 Mg ion and 2 chloride ions in 1 molecule of MgCl2.

2E5 what?