If 100. mL of 0.400 M Na2SO4 is added to 200. mL of 0.600 M NaCl, ...

[a0266361136]

If 100. mL of 0.400 M Na2SO4 is added to 200. mL of 0.600 M NaCl, what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.
 
  A) 0.534 M
  B) 0.667 M
  C) 1.00 M
  D) 1.40 M

Question 2

Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74  1014 Hz.
 
  A) 633 nm
  B) 158 nm
  C) 142 nm
  D) 704 nm
  E) 466 nm

[katheyjon]

Answer to Question 1

B

Answer to Question 2

A

[a0266361136]

Excellent

[hollysheppard095]

Gracias!