What are the concentrations of H3O+ and OH − in each of the following?
(a) 1.87 M NaOH
H3O+
M
OH −
M

(b) 0.29 M Sr(OH)2
H3O+
M
OH −
M

(c) 0.059 M HClO4
H3O+
M
OH −
M

(d) 0.75 M HCl
H3O+
M
OH −
M