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?

Energy is not a necessary resource. True False

For each pair; which has higher kinetic energy? (a) A sled resting at the top of a hill or a sled sliding down the hill (b) Water above a dam or water falling over the dam

What process best explains the astounding variety of dogs at a dog show? A. hybridization B. asexual reproduction C. selective breeding D. genetic engineering

1. How do minerals form beneath Earth's surface? 2. How do minerals form outside of the Earth? 3. What is crystallization? 4. How are minerals used?

What is added to a concentrated solution of sodium thiosulfate to dilute it?

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.

A student asked to convert measurements from liters to mililiters and from mililiters to liters. His answers are shown in bold in the choices shown below. On which choice did he make a mistake?

Donald is making a model of a nitrogen atom. The box for nitrogen in the periodic table is shown. To represent a neutral atom, which of these must Donald include in his model?