How does GPS help predict volcanic eruptions? The ground swells slightly before an eruption. GPS devices can detect the swelling.

GPS satellites can see into the cone of the volcano.

The magma carries a GPS device as it travels. Scientists can track the flow of magma by adding more GPS devices to magma.

GPS devices can detect when gases leave a volcano before an eruption.

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.

l dont know l am s sorry

the answer is 75.0%.