How many lone pairs are on the central atom in BCl3

Thorium-234 has a half life of about 25 days. What percent of the thorium will remain after 125 days

At the same temperature and pressure, which state of matter has the highest density?

The temperature of a gas is increased. Which statement best explains the effect that is has on the motion of gas particles

Which two parts of an atom determine the atom's mass?

What are the 5 categories of the food chain?

Which statement is true according to the kinetic theory? 1. Moles of different gases with the same mas and temperature always have the same average density. 2.

A substance with a pH of 9 has A) no H30 + ions or OH - ions. B) more H30 + ions than OH - ions. C) more OH - ions than H30 + ions. D) the same number of H30 + ions as it does OH - ions.

Consider the following quantities used in thermodynamics: E, H, q, w, S, G. How many of them are state functions? a. 2 b. 0 c. 3 d. 1 e. 4

What are some good problem statements

A 5.00L reaction vessel is filled with 1.00mol of H2, 1.00mol of I2, and 2.50mol of HI. If equilibrium constant for the reaction is 129 at 500k, what are the equilibrium concentrations of all species?