When solid ice at 0 Celsius melts and becomes liquid water, there is no change in temperature while melting. A. true
B. false

True

Explanation:

It's true. All the energy that is absorbed is used to break the bonds from the solid ice to liquid water. The temperature remains at 0 while this process is going on.

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.