El nitrito se determina por la reacción de Griess, que proporciona un compuesto coloreado que se absorbe a 550 nm y en una celda de 2cm , los resultados obtenidos para la disolución patrón de nitritos y para una muestra desconocida se presenta en la tabla adjunta . Calcule la concentración de nitrito en la muestra

Which best describes how johannes kepler developed his laws of planetary motion

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)