Question 4 Adam dissolved magnesium carbonate (MgCO3) in hydrochloric acid (HCI) to form a solution of
magnesium chloride (MgCl2), carbon dioxide (CO2) and water (H20).
a. Write the word equation for the reaction

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.