Electronic Transitions are often described in terms of ninitial (where the electron starts out) and nfinal (where the electron moves to). Which of these transitions involves the absorption of the most energetic photon? Group of answer choices ninitial=1 and nfinal=4 ninitial=4 and nfinal=1 ninitial=2 and nfinal=1 ninitial=1 and nfinal=3

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.