A photon has a wavelength of 624 nm. calculate the energy of the photon in joules

Which of these is a good conductor? 1) wood 2) air 3 ) silver 4) paper

When a sample of gas is cooled, it condenses into a liquid. In which of the following ways do the molecules of the original gas sample compare with the molecules of the liquid? a. The molecules weigh less as a gas than they do as a liquid. b.

The molecular weight of NaCl is 58.44 grams/moles. How many grams of NaCl are found in a beaket with 100 ml of a 0.0050 M solution

Salt seems to disappear when it is poured into water. Use the terms mixture, solution, and dissolve to explain what happens

1) Which pure substance is composed of more than one element? A. carbon B. gold C. water D. sodium

What is the mass of 4.6 moles of helium gas?

In the process of ionization, what is the relationship between the second ionization energy and the third ionization energy?

What are examples of convection?

Find the mass of 1 mole of cuprous oxide, or cu2o. assume the atomic mass of copper is 64 and oxygen is 16.

Ice (H2O) melting at 273 K and 1 atm has = 6.01 kJ/mol and = 6.01 kJ/mol while water vaporizing under the same conditions has = 37.6 kJ/mol and = 40.7 kJ/mol. Why is there such a large difference between and, but not for and?