1.) How many photons are produced in a laser pulse of 0.643 J at 575 nm? 2.)A certain rifle bullet has a mass of 5.01 g. Calculate the de Broglie wavelength of the bullet traveling at 1649 miles per hour. Consult the table of physical constants as needed.
3.) What element forms an ion with an electronic configuration of [Ne] and a −2 charge?

A typical laser pulse used in MALDI is about 60 microjoules/pulse at 337 nm. At 337 nm the power is about 6 x 10^-19 J/photon. Doing the math suggests that of 10^14 photons are in a typical desorption pulse

Explanation:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.