Calculate the molarity (M) of a solution prepared by dissolving 1.00g of ethanol (C2H6O) in enough water to give a final volume of 101 mL.
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1MHz=1^6 Hz = 1s^-1. Calculate the broadcast wavelenght of the radio station 97.90 FM Green light has a frequency of about 6.00*10^14 s^-1 what is the energy of green light? Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (nm ), where 1nm=10^-9 m. What is the energy of the X-rays?