Question

How many moles of gold (Au # 79) are in 357.80 grams of gold?

Answer 1

`moles_(Au)=1.8166molAu`

Step-by-step explanation:

Hello,

In this case, since one mole of an element is related with its atomic mass, for gold whose atomic mass is 196.96657 g/mol, the corresponding number of moles turn out:

`moles_(Au)=357.80gAu* (1molAu)/(196.96657g Au) \\\\moles_(Au)=1.8166molAu`

Best regards.

Answer 2

1.82moles

Step-by-step explanation:

Mass = 357.80g

Molar mass of gold (Au) = 196.97g/mol

Number of moles = mass / molar mass

Number of moles = 357.80 / 196.97

Number of moles = 1.8165 moles

The number of moles is approximately 1.82molespresent in 357.80g of Au