20 POINTSSS This ecosystem has very few plants and a limited number of animal species. What two non-living factors limit the plants and
animals that
live here?
A)
sandy soil and lots of rainfall
B)
little sunlight and little water
low temperature and little rainfall
D)
high temperature and little rainfall

D) High temperature and little rainfall

Explanation:

The desert has sunlight  and the other two don't make sense, because there is not much rainfall and the temp is high

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.