a reaction is in equilibrium as shown: a + b c + d. calculate the equilibrium constant if the final concentrations stabilize at:

a = 9.60 m
b = 10.0 m
c = 4.00 m
d = 4.00 m

What is the h+ concentration for an aqueous solution with poh = 4.01 at 25 ∘c? express your answer to two significant figures and include the appropriate units.

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

There are main groups in the modern periodic table of elements