Calculate the mass of 2.94*10^ 17 atoms of hafnium.

1 answer

The atomic mass of hafnium is 178.49 g/mol, which means that one mole of hafnium contains 6.022 x 10^23 atoms.

To calculate the mass of 2.94 x 10^17 atoms of hafnium, we can use the following formula:

mass = (number of atoms/molecular or atomic mass) x molar mass

mass = (2.94 x 10^17/6.022 x 10^23) x 178.49 g/mol

mass = 2.94 x 10^17/6.022 x 10^23 x 178.49 g

mass = 3.48 x 10^-6 g

Therefore, the mass of 2.94 x 10^17 atoms of hafnium is approximately 3.48 x 10^-6 g.