At what volume of added base is the ph calculated by working an equilibrium problem based on the initial concentration and ka of the weak acid?

Scientific theories can be formed after many hypotheses, experiments, and observations have been made that all validate the same idea. Once a theory is established and used to make accurate predictions, it is set in stone as a fact.

Halley's comet is a comet that passes close to Earth every 75 years. Based on this passage, which gravitational attraction has the most influence on the movement of this astronomical object? A. Attraction between the comet and Jupiter B.

What is true of all particles of gas enclosed within a container?

Which of the following is the best definition of ethics? A) guidelines for good behavior B) laws that require scientists to research certain things C) the needs of society

How does the mass of an object change when it acquires a positive charge?

A standing wave is established in an organ pipe that is closed at one end. What is located at the open and closed ends of the pipe?

When all parts of a circuit are composed of conducting materials, the circuit is said to be A. parallel. B. closed. C. open. D. shorted.

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.