The southern United States experiences periodic occurrences of severe cold and drought conditions. Which weather phenomenon most likely causes this and why? La Niña, because the jet stream is displaced southwards La Niña, because the jet stream is displaced northwards El Niño, because of increased upwelling of cooler waters El Niño, because of decreased upwelling of cooler waters

a

Explanation:

but I'm not 100% sure

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.