Explain why a beaker containing hydrogen peroxide solution and a small amount of manganese(IV) oxide catalyst loses mass over the course of the reaction.
A student plotted the loss of mass of the beaker and its contents against time. To find the rate of reaction at a specific time, they drew a tangent to the curve. The tangent line passes through the points (32 s,0.27 g)(32\text{ s}, 0.27\text{ g})(32 s,0.27 g) and (96 s,1.15 g)(96\text{ s}, 1.15\text{ g})(96 s,1.15 g).
Determine the rate of reaction represented by this tangent. Give your answer to 2 significant figures and include the appropriate units.