Chemistry 30 A i really need help it is on Stoichiomety about moles and grams?

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you Received a gift of 6,000 trillion gold atoms. this is a very large #/ it is 6.0 followed by 21 zeros or 6.0 * 10^21. Express this amount in moles and in grams. also calculate the monetary value of the gift in US dollars. given that 1.0 g of Gold is worth $30.0
A) mass in moles
B) mass in grams
c) dollar value
 
Use Avogadro's number, 6.022 x 10^23 atoms per mole to change your 6,000 trillion gold atoms to that many gold moles.
Then use the number of gold moles, and find gold (chemical symbol Au) molar mass, which is 196.97 grams per mole. This will give you grams of Au.
Now use this number you found and change it to Dollar value!
 
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