What is the hydroxide ion concentration of a solution with a pH of 3.0?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?