The solubility of an unknown substance was tested three times during an experiment. Based on the solubility curve shown and the results of the experiment, what is most likely the identity of the substance? Select one: O sodium nitrate о potassium chloride O potassium nitrate O sodium chloride Solubility (grams of solute/100 g H₂0) 120 110 100 90 80 70 60 50 40 30 20 10 NaNO₂ SONY KCI NaCl 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Mass of Unknown Solute That Dissolves in 100 g Water 50°C Trial 1 2 40°C 63.2 g 80.2 g 30°C 46.0 g 45.9 g 44.3 g 45.4 9 81.3 g 61.4 g 62.9 g 62.5 g 3 Average 79.8 g 80.4 g

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