What is the mass of 4.50 mol #Fe#?
Elemental iron has a molar mass of
So the mass of the given molar quantity?
n - number of moles
m - mass of substance
M - molar mass (same as atomic weight on periodic table)
4.50 moles (n) has been given to you.
Now find the molar mass (M) of Fe. If you look into your periodic table, the molar mass of Fe is 55.9 g/mol.
To find the mass of substance (m), you need to flip over the formula, therefore,
The mass (m) of Fe is:
Note: It is rounded to the nearest one decimal place.
4.50 moles of Fe should give you 251.6 grams of Fe.