What are the concentrations of hydroxide and hydronium ions in a solution with a pH of 10.2? (4 points) 1.4 x 10−4 M H3O+ and 7.1 x 10−11 M OH−

3.8 x 10−6 M H3O+ and 2.6 x 10−9 M OH−

8.3 x 10−9 M H3O+ and 1.2 x 10−6 M OH−

6.3 x 10−11 M H3O+ and 1.6 x 10−4 M OH−

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.

Draw metallic bonding if two copper

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?