Which is formed when a standard hydrogen half-cell is connected with a salt bridge to a standard zinc half-cell?

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it