Answer: 1. The chemical formula of the negative polyatomic ion present in an aqueous nitric acid solution is nitrate, which has a chemical formula of NO3-.
2. The solubility of sulfur dioxide (SO2) in water is negatively affected by an increase in water temperature. This means that as the temperature of water increases, the solubility of SO2 in water decreases. This is because the solubility of gases in water generally decreases with increasing temperature, due to the decrease in gas molecules' ability to dissolve in water. Therefore, when water temperature increases, the amount of SO2 that can dissolve in the water decreases, resulting in less acidic rainfall.
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