6p Determine the number of atoms in a solid square disc of pure Silicon with sides measuring 6.9 cm and a thickness of 1.6 mm. Assume the atomic weight and density of Si are 0.0280855 g/millimole and 2330 kg/cu m, respectively. Apply definitions of density, volume, mole and atomic weight. Avogadro's No = 6.0221E23 atoms/mole Express algebraic solution in terms of s, th, AW and rho. Elem Silicon Symb S th AW Si 6.9 1.6 0.0280855 2330.0