1- What is the wavelength of light (in nm) if the frequency is 4.2 x 10^14 (1/sec)? 2- What is the wavelength of light (in nm) if the energy of the

1-     What is the wavelength of light (in nm) if the frequency is 4.2 x 10^14 (1/sec)?

2-     What is the wavelength of light (in nm) if the energy of the wave is 2.54 x 10^-19 J?

3-     What is the final concentration of a solution if 157-mL of a 3.4-M solution was diluted to 310-mL?

4-     What is the final concentration of a solution if 15-mL of a 1.5-M solution was diluted to 100-mL and this process was repeated two more times?