Equilibrium systems exist throughout nature.

True or False?

What can you say about the relative strength of chloroform-acetone interactions compared to the acetone-acetone and chloroform-chloroform interactions?

What role does the salt bridge play in voltaic cell

Mary discovered that the cell membrane of a bacteria act like a fence because it keeps some things in and other things out a. observation b. analogy c. inference

Which of the following statements is true? A. Sound waves are the only waves that reflect. B. An echo is a sound wave reflection. C. In reflection, all of the initial energy of the sound wave bounces back. D.

What is the mass of 2.50 * 1022 molecules of NaOH (Molar mass = 40.0 g/mol) ?

Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid. CO2 + H2O - --> H2CO3

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)