mtchar329 mtchar329

17-01-2022
Chemistry

contestada

A sample of crushed rock is found to have 4.81 x1021 atoms of gold, how many moles of gold are present in this sample?

7.99 x 10^-3 moles

1.57 x10^-1 moles

1.25 x 10^3 moles

2.47 x10^5 moles

Respuesta :

Gurpreti Gurpreti

31-01-2022

Answer:

7.99 x 10^-3 moles

Explanation:

Use the Avogadro constant of 6.02 x 10^23

Number of moles of gold

= (4.81 x 10^21) ÷ (6.02 x 10^23)

= 7.99 x 10^-3 moles

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