A student completed the experiment but found that the total amount of material recovered weighed more than the original sample. what is the most likely cause of this error and how may it be corrected?
A student found that the mass of the naphathalene collected (0.055), was less than the mass determined by difference (0.404). what would account for the smaller amount of naphthalene collected?
Mothballs in a clothes closet gradually disappear over time. What happens to this material?