Author Question: If 100. mL of 0.400 M Na2SO4 is added to 200. mL of 0.600 M NaCl, what is the concentration of Na+ ... (Read 109 times)

a0266361136 · **on:** Aug 27, 2018

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