The Ksp expression for Hg₂Br₂ is Ksp=[Hg₂²⁺] [Br⁻]² and for Fe(OH)₂ it is Ksp=[Fe²⁺] [OH⁻]². How do I know when the 2 stays inside the brackets and when it goes outside the brackets? Thank you!

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

Which formula can be used to calculate the molar mass of hydrogen peroxide

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.