which of these would be directly related to the science of ecology?
a: uncovering the genetic makeup of the eastern cottontail rabbit
b: developing strains of corn that can withstand a combination of drought and high winds
c: learning about foods that benefit the heart and blood vessels
d: studying how the mayfly population affects the number of trout in a stream !

The answer is:

D.) studying how the mayfly population affects the number of trout in a stream

If its correct, I'm happy to help XD

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.

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