Multiple Choice
Passage
Sulfur is the 10th most abundant element on Earth and is an essential element in biological systems. Sulfur can form a variety of chemical compounds and will react with nearly every element except Au, Pt, Ir, Te, and the noble gases. A list of several common inorganic compounds of sulfur is given in Table 1.Table 1 Selected Common Inorganic Sulfur Compounds
Reduction of elemental sulfur by bacteria during anaerobic digestion produces the toxic, foul-smelling gas H2S. Oxidation of elemental sulfur via combustion or volcanic processes yields gases of SO2 and SO3. When dissolved in water, both SO2 and SO3 produce acidic solutions, and SO3 reacts with water to form the acid H2SO4. Neutralization of H2SO4 can provide a variety of salts, including Na2SO4.Elemental sulfur can also react with halogen gases to form sulfur halides such as the industrially important insulator gas SF6 and the synthetic reagent S2Cl2. S2Cl2 facilitates the formation of other sulfur compounds. For example, reacting S2Cl2 with NH3 produces the sulfur pnictide S4N4.
-The anion SO32− and sulfur trioxide, SO3, have the same elemental composition. These two chemical species are:
A) the same compound, because both have the same elemental composition.
B) the same compound, because both have the same number of electrons and bonding configuration.
C) different compounds, because the atoms in SO32− are held together by ionic bonds.
D) different compounds, because SO32− has two more electrons and a different bonding configuration.
Correct Answer:

Verified
Correct Answer:
Verified
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