Write the balanced COMPLETE ionic equation for the reaction when KOH and Cu(NO₃)₂ are mixed in aqueous solution. If no reaction occurs, write only NR.

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

What are the first three quantum numbers for the electrons located in subshell 2s?