Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature.
The two systems must not be touching each another.
One system must have higher kinetic energy than the other system.
The thermal energy of one system must be the same as the thermal energy of the other system.

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.

the answer is   c.) 1575 j.

explanation: