CHEMICAL FORMULAE// STOICHIOMETRY

Question 1

common ionic compounds

Answer 1

iron(II) -> Fe^2+
copper (II) -> Cu^2+
chromium (III) -> Cr^3+
hydroxide -> OH^-
nitrate ->NO3^-
sulfate -> SO4^2-
carbonate -> CO3^2-
ammonium --> NH^4+
hydrogen carbonate -> HCO3^-

Question 2

Symbol for relative atomic mass

Answer 2

Ar

Question 3

how to calculate relative atomic mass

Answer 3

100