2. A major abiotic factor in fresh- water ecosystems is the
a. source of the water.
b. speed of the water.
C. width of the stream or river.
d. None of the above

What is the formula for calcium iodide

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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