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1.2.2 Calculate the mass of a mole of a species from its formula IB Chemistry SL

Adding up the atomic mass for every atom in a formula will give you the mass of 1 mole in g/mol eg CaCO3 = 40+12+16+16+16 = 100g/mol So in 100g of calcium carbonate I would find 6x10^23 molecules. 6x10^23 of anything is called 1 mole, just like 12 of anything can be called a dozen. Use the equation "mass = moles x Molar Mass" if you have more than 1 mole.
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