In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains
a. two carbon atoms. b. two oxygen atoms. c. a polyatomic ion. d. an ionic bond.

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

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

Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.