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16 April, 08:55

By making several measurements with the same balance, a chemist obtained values of 5.224 g, 5.235 g, and 5.259 g for the mass of a sample. Without knowing the actual mass of the sample, we can tell that these measurements have.

a) good precision

b) good accuracy

c) poor precision

d) poor accuracy

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Answers (1)
  1. 16 April, 10:49
    0
    a) Measurements have a good precision.

    Explanation:

    Accuracy is the proximity of the data to the value considered as real, in this situation we do not know the real value and we do not know if the data is accurate or not, so we can discard options b and d.

    Now, precision is the proximity of the data obtained among themselves and that is what we can observe, so the appropriate answer is the option a.
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