An electromagnetic wave has a frequency of 45,000,000 Hz. What is this frequency in scientific notation?
O A. 4,5*10^8 HZ
B. 4.5 * 10^8 HZ
O c. 4.5*10^7 HZ
D. 4.5*10^8 HZ​

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

How many formula units in 2.63 mols of nacl?