La masa de un clavo es de 14 g y contiene 80 % de hierro. Hallar la cantidad de átomos de hierro en el clavo.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?