The following measurements were made to determine the density of a material whose value was, according to the Handbook of Chemistry and Physics, 1.24 g/mL Trial #1 1.20 g/mL Trial #2 1.22 g/mL Trial #3 1.22 g/mL a. make a general comment on the accuracy of these results b. make a general comment on the precision of these results c. what may have caused these results?

Please find the comments for a, b and c below

Explanation:

According to the question, density of a material based on the Handbook of Chemistry and Physics is 1.24 g/mL. This represents the accepted or true value for the density of that material. However, measured values are as follows;

Trial #1: 1.20 g/mL

Trial #2: 1.22 g/mL

Trial #3: 1.22 g/mL

a) Based on the observation of the measured/experimental values in each trial, one would say they are ACCURATE because they are close to the accepted value of 1.24g/mL

b) Precision is a function of how close the repeated values are to one another rather than that to the accepted value. In this case, the experimental values are close to one another, hence, are said to be PRECISE.

c) The difference in results of the measured values in comparison to that of the accepted value (handbook) can be attributed to ERRORS during measurement called EXPERIMENTAL ERROR.

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