Q2. Write the formulas of some common compounds:- Compound Formula Water Carbon dioxide Carbon monoxide Sulphur dioxide Nitric acid Sulphuric acid
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- Pure water has a pH of 7.0 (neutral); however, natural, unpolluted rainwater actually has a pH of about 5.6 (acidic).[Recall from Experiment 1 that pH is a measure of the hydrogen ion (H+) concentration.] The acidity of rainwater comes from the natural presence of three substances (CO2, NO, and SO2) found in the troposphere (the lowest layer of the atmosphere). As is seen in Table I, carbon dioxide (CO2) is present in the greatest concentration and therefore contributes the most to the natural acidity of rainwater.
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Answer: (A) Water has the chemical formula H2O.
(B) Carbon dioxide is made up of one carbon atom and two oxygen atoms. Therefore, its formula is CO2.
(C) Carbon monoxide is made up of one carbon atom and one oxygen atom. Therefore, its formula is CO.
(D) Sulfur dioxide (also sulphur dioxide, sulfurous anhydride, or sulphurous anhydride) has the chemical formula SO2.
(E)Nitric acid has the chemical formula HNO₃.
(D)Sulphuric acid has the chemical formula H₂SO₄.
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