11. The ratio of the rates of diffusion of a given element to that of helium is 4. What will be the molecular weight of the element? a. 0.25 b. 4 d. 7 C. 2

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.