Question

How many grams of Magnesium are in 3 moles of Magnesium (Mg)?

Answer 1

To find out how many grams of Magnesium there are in 3 moles of Mg we need to us its atomic mass: 24.3 g/mol

So:

24.3 g of Mg ---- 1 mol of Mg

x g of Mg ---- 3 moles of Mg

x = 72.9 g of Mg

Answer: 72.9 g of Mg