What is the pH of an aqueous solution at 25.0 C in which OH- is ...

[bobthebuilder]

What is the pH of an aqueous solution at 25.0 C in which OH- is 0.0030 M?
 
  A) 5.81
  B) -11.48
  C) 2.52
  D) -2.52
  E) 11.48

Question 2

It takes 258 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect?
 
  A) 464
  B) 233
  C) 165
  D) 725
  E) 552

[kswal303]

Answer to Question 1

E

Answer to Question 2

A

[bobthebuilder]

TYSM

[billybob123]

Excellent