The work function (ϕ) of a metal is the minimum energy needed to remove an electron from its surface. (a) Is it easier to remove an electron from a gaseous silver atom or from the surface of solid silver (ϕ = 7.59×10−19 J; IE = 731 kJ/mol)? (b) Explain the results in terms of the electron-sea model of metallic bonding.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

How many moles are in 123.0 grams of kclo4?