Which action destroys topsoil?

I think it erosion

Explanation:

Well erosion washes away top soil

Wind Erosion

Explanation:

Wind erosion is the detachment , transportation and redeposition of soil particles by wind. The most familiar result of wind erosion is the loss of topsoil and nutrients which reduces the soil's ability to produce crops.

Hope it helps you and pls mark as brainliest : )

passing a magnet thought the

mixture , because iron gets attracted to magnet .

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.