Examine the reactants of the incomplete double-displacement reaction. 2nacl + h2so4 → which of the answer choices correctly predicts the product of the double-displacement reaction? a. na2so4cl + h2 b.2naclh2so4 c. na2so4 + 2hcl d.2na + cl + h2 + so4

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.