CAN SOMEONE PLEASE HELP ME OUT WITH THESE 2 QUESTIONS? ILL GIVE YOU A GOOD RATING!!

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

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What must happen before a body cell can begin mitotic cell division