The mass in grams of 2.75 x 1021atoms of li is. a. 0.3017 g c. 3.017 g b. 0.0317 g d. 0.00317 g

The  mass   in   grams  of   2.75   x10^21  is  calculated  as
by  use  of  avogadros law
 1mole  =  6.02  x  10  ^23 atoms
what   of   2.75  x  10^23  atom
  2.75  x 10^21atoms  x  1mole/  6.02  x  10^23=  4.568  x10  ^-3moles
mass  is  therefore =  moles  x  molar  mass  of  lithium(6.941)
that  is   (4.568  x  10^-3)  x  6.941 =0.0317 grams

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy