Question

neetu presented a silver lamp on her birthday. the lamp contains 3.022*10^23 of atoms of silver . what is the mass of the silver lamp and cost of it. if 1 gram of the silver is rs.60{atomic mass=108 u: atomic number=6.023810^23}

Answer 1

According to Avogadro Number

$6.022 * 10^{23} atom = 108 gm$
Or, $1 atom = \frac{108 gm}{6.022 * 10^{23} }$
Or, $3.022 * 10^{23} atoms = \frac{108 gm}{6.022 * 10^{23}}*3.022*10^{23} = 54.2 gm$

If 1 gm = Rs. 60 Therefore 54.2 gm = Rs 3252