How can a magnetic field be used to generate an electric current? a. when a magnet moves near a wire, the domains in the magnet line up and flow through the wire as electric current. b. electric current flows when a stationary magnet causes the magnetic field to change. c. electrons in a wire flow when a stationary magnet causes the electrical field to change. d. when a magnet moves near a wire, its changing field causes the electrons in the wire to flow as electric current.

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.