Question

Calculate the mass (in ng) of 2.33 x 1020 atoms of oxygen.

Answer 1

Answer:

$6.19*10}^{6}$ g of Oxygen

Explanation:

In order to answer the question the Avogadro´s number is needed:

Avogadro´s number = $6.022*10^{23}$$mol^{-1}$

Calculate the mass using the Avogadro´s number:

$2.33*10^{20}atomsO*\frac{1molO}{6.022*10^{23}atomsO}*\frac{16gO}{1molO}*\frac{1*10^{9}g}{1g}=6.19*10}^{6}$ g of Oxygen

Answer 2

Answer = 6.19 x 10^6