The work function of an element is the energy required to remove an electron from the surface of the solid. the work function for rhodium is 480.5 kj/mol (that is, it takes 480.5 kj of energy to remove 1 mole of electrons from 1 mole of rh atoms on the surface of rh metal). what is the maximum wavelength of light that can remove an electron from an atom in rhodium metal?

Explanation:

Given that:

The work function of the rhodium = 480.5 kJ/mol

It means that

1 mole of electrons can be removed by applying of 480.5 kJ of energy.

Also,

1 mole =

So,

electrons can be removed by applying of 480.5 kJ of energy.

1 electron can be removed by applying of of energy.

Energy required =

Also,

1 kJ = 1000 J

So,

Energy required =

Also,

Where,  

h is Plank's constant having value

c is the speed of light having value

So,

Also,

1 m = 10⁻⁹ nm

So,

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.