What is the mass in grams of 3.5 mol of the element gold, au?
explain how to do it, i am you(:

Atomic mass of Au = 196.9 g/mole 

it means that 1 mole of Au = 196.9 g 

so 3.5 moles of Au = 196.9 X 3.5 = 689.15 g

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