When measuring the density of chloroform (CHCl3) at 20°C, one chemist obtained values of 1.495 g/mL, 1.476 g/mL, and 1.485 g/mL. Another chemist performed the same experiment and obtained values of 1.487 g/mL, 1.490 g/mL and 1.488 g/mL. The accepted density of chloroform at 20°C is 1.489 g/mL. How would you compare the accuracy and precision of the first chemist's measurements to those of the second chemist?

The second chemist is more precise and accurate

Explanation:

Accuracy refers to how close the measured value is to the accepted value. Precision refers to how close together the values of replicate measurements are to each other.

If we look at the work of the second chemist, we will notice that the values from each single measurement does not vary widely from each other. This implies that the measurements are precise.

Similarly, the three values obtained from the three replicate measurements of the density of chloroform are all close to the accepted value. Hence they are more accurate than those off the first chemist

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