medium · Enhanced ACT science
In a chemistry experiment, a student adds 10.0 g of NaCl to 100 mL of water and measures the temperature change.
To improve the 'precision' of the experiment, which of the following should the student do?
- Use a thermometer that measures to the nearest 10 degrees
- Change the independent variable to use KCl instead of NaCl
- Wait longer between trials to ensure the water is cold
- Perform multiple trials and calculate the average result
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