A single grain of sand occupies a volume of about 0.004 cubic millimeters. Based on your previous answer, how many
grains of sand are on Earth's beaches?
There are 109 cubic millimeters in each cubic meter. Express your answer to the correct number of significant figures.
There are
10
grains of sand on the beaches.

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next