Rays of light incident on a lens and parallel to the principal axis of the lens converge a. in back of the lens. b. at the focal point of the lens. c. at the center of curvature of the lens. d. in front of the lens.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

What occurs when a cell engulfs large food particals