Question

What is the mass in grams of 3.5 mol of the element gold, Au?
Please explain how to do it, I am confused!! Thank you(:

Answer 1

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