What should the student do after he has collected and analyzed his data?

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Can someone me with questions 15 to 17 plz.