Substances Y and Z can act as oxidizing agents. Substance Y is green and substance Z is yellow. They can form the ions Y- and Z-, respectively - both of which are colorless. When a green solution of Y is mixed with a colorless solution containing Z- ions, the color changes from green to yellow. What are the products of the reaction

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

List four observations that indicate that a chemical reaction may be taking place

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.