A 1.0 M solution of NaCl has a final concentration of 0.20 M and a final volume of 200 mL, what was the initial volume of the NaCl solution in mL?

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

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

What type of reaction fuels the processes seen here?