Question

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

Answer 1

Answer = 6.19 x 10^6

Answer 2

`6.19*10}^(6)` g of Oxygen

Step-by-step 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*(1molO)/(6.022*10^(23)atomsO)*(16gO)/(1molO)*(1*10^(9)g)/(1g)=6.19*10}^(6)` g of Oxygen