Explain a reason Kevin used a stopper in his experimental setup AND what could happen to the mass of the products of this reaction if the stopper were not used.
Kevin likely used a stopper in his experimental setup to prevent any gases or vapors produced during the reaction from escaping. If the stopper were not used, the gases or vapors could escape into the surrounding environment, leading to a loss of mass in the products of the reaction. This loss of mass could result in inaccurate measurements and calculations of the reactants and products involved in the reaction. By using a stopper, Kevin ensures that all reactants and products remain contained within the system, allowing for more precise and accurate measurements.
