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how many iron (III) ions are there in 5.00g of Fe2O3?

how many iron (III) ions are there in 5.00g of Fe2O3?

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Answer #1

mass of Fe2O3 = 5.00gram

molar mass of Fe2O3 = 159.69 gram/mole

1 mole of compound contains Avagadro numberof ion

number of Iron(III) ions present in 159.69 grams of Fe2O3= 2x 6.023 x 10^23 ions

number of Iron(III) present in 5.00 grams =?

                                                      = 2x6.023 x 10^23 x 5.00/159.69 = 0.3772

number of Iron(III) ions present in 5.00 grams of Fe2O3.

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