Science Quiz / A Third Case of the Missing Subscripts

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

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Chemical Name and FormulaMissing Subscript
Benzene: C__H6
1-Nonyne: C__H16
Carbon Dioxide: CO__
Silver Cyanide: AgC__N
Acetone: (CH__)2CO
Oxygen (elemental, standard conditions): O__
Sulfur (elemental, standard conditions): S__
Diphosphorus Pentoxide: P2O__
Chemical Name and FormulaMissing Subscript
1,3-Dichloroprop-1-ene: C3H__Cl2
Lead (elemental, standard conditions): Pb__
Rubidium phosphide: Rb__P
Ethanol: C2H__O
2,3-Dimethylheptane: C__H20
Hydrochloric Acid: H__Cl
Cyclobutanol: C4H8O__

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