KewlKid123
KewlKid123
16-10-2018
Chemistry
contestada
How many moles are there in 545g of Fe2O3 ?
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jamiexx
jamiexx
16-10-2018
To calculate the number of moles, the equation is mass of substance divided by the molar mass of substance.
Molar mass of Fe2O3 is the relative atomic mas of all the elements from the substance added up, which makes 55.845x2 + 16.0 x3 = 159.69g mol-1
So the number of moles is
545g / 159.69gmol-1
=3.41 mol (corrected to 3 sig. fig.)
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