Sara measured the amount of potassium nitrate (KNO3) that could be dissolved in 100 grams of water at different temperatures. She repeated the test five times. The data from Sara's experiment is listed in the table below.
Temperature Mass of KNO3 in 100 g Water Average Mass
KNO3
Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
0°C 12.8 g 12.9 g 13.2 g 12.7 g 13.1 g 12.9 g
20°C 31.9 g 32.1 g 32.3 g 31.8 g 31.7 g 32.0 g
40°C 62.8 g 64.3 g 64.1 g 63.8 g 64.5 g 63.9
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