The Case of the Missing Subscripts: The Sequel

Random Science or elements Quiz

Can you name the missing single-digit integer that correctly completes each chemical formula?

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Chemical Name and FormulaMissing Subcript
Trirhenium Nonachloride: Cl__Re3
Ethane: C2H__
Hydrogen Peroxide: H2O__
Sodium Bicarbonate: NaHCO__
Heptaphosphorus Octafluoride: P7F__
Hemin: C34H32ClFeN__O4
Barium Fluoride: BaF__
Potassium Carbonate: K__CO3
Chemical Name and FormulaMissing Subcript
Hydrogen Cyanide: HCN__
Dinitrogen Tetroxide: N2O__
Ammonium Oxalate: C2H__N2O4
Sulfuric Acid: H2SO__
Lead (IV) Chromate: Pb(CrO__)2
Methanol: C__H3OH
1-Pentanol: C__H12O

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