1. The empirical formula of the compound HC2H3O2 is … 2. The formula of Iron (III) nitrate hemi hydrate is ………………………………

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1. The empirical formula of the compoundHC2H3O2 is …
2. The formula of Iron (III) nitrate hemi hydrate is……………………………………………………and the molar mass of this compoundis
3. A contaminate water sample is believed to have one or more ofthe following metal ions. { Pb2+, Ca2+,Na+}. A student is asked to remove these ions fromthe water by forming a solid when adding an anion. Describe whatanions the students must add to the water sample and what is theformula of the solids that will form.