Which of the following chemical reactions is not an oxidation-reduction reaction?

cuso4 + bacl2 yields baso4 + cucl2

n2 + 3h2 yields 2nh3

zn + h2so4 yields znso4 + h2

2na + cl 2 yields 2nacl

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.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+