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Empirical formula for arsenic oxide

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How to start from from grams to determine % to then calculate the empirical formula.

As and O combine
1.626g sample of a compound has 1.232g of As

© BrainMass Inc. brainmass.com September 21, 2018, 1:37 pm ad1c9bdddf - https://brainmass.com/chemistry/stoichiometry/empirical-formula-arsenic-oxide-60597

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Let call the unknown compound AsxOy

The molecular weight of AsxOy=75x+16y (g)

Since 1.626g sample ...

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