Write the Molecular, Ionic and Net ionic equations for the following reactions. Indicate the spectator ion. Reason why the solid is precipitated 1) CuSO4 (aq) + H2S (aq) ........> CuS (s) + H2SO4 (aq) 2)BaCl2 (aq) + K2CO3(aq) ........> BaCO3(s) + 2KCl (aq) Carry out the following operations and express the result to the correct number of significant figures: 1) 12 X 2143.1 2) 3.09 + 7.0 3) (2.2 x 10-3) (1.40 x 106) 4) 12.07 + 1.222 5) 595.2 x (24.33 -16.271)