Study this image. The Continental crust and Lithosphere on the right are moving left toward the Continental crust and Lithosphere on the left that are moving right and pushing down below the Asthenosphere. A layer of Ancient oceanic crust is beneath the Lithosphere on the right. Which feature forms at this plate boundary? mountains rift valleys volcanoes island chains

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.

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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explanation:

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the answers would be

the first one and the second one