If a buffer solution is 0.120 M in a weak acid (Ka = 2.0 * 10-5) and 0.440 M in its conjugate base, what is the pH?

The notation for the nuclide 13755Cs gives information about (1) mass number, only (2) atomic number. only (3) both mass number and atomic number (4) neither mass number nor atomic number

How many moles of carbon are in 7.87*10^7 carbon atoms

How many feet are there in 341 centimeters

The nitrogen and hydrogen atoms that make up ammonia are held together by

The electric force between a charged foam cup and a positively charged metal sphere is 2.12 newtons. If the charge on the cup is 2.0 * 10-6 coulombs and the charge on the metal sphere is 2.

The closeness of a measurement to its actual value is a measure of its A. usefulness. B. reproducibility. C. precision. D. accuracy.

At 300 k the pressure inside a gas filled container is 500 kPa if the pressure inside decreses to 100kpa but the volume remains the same what is the final temperature of the gas

The SI unit for current is: joules volts ohms amps

In chemical reactions, there is a conservation of what?

If the temperature of water increases as you heat it, the temperature is the independent variable. True False