Question

A sample 10.3 mL of water based on a density calculation should have a mass of 10.3 g. The mass of the sample is measured 5 times giving very similar values:

9.8872 g, 9.8875 g, 9.8871 g, 9.8872 g, and 9.8874 g.

In terms of accuracy and precision...

(A) The measurement is both accurate and precise
(B) The measurement is neither accurate nor precise
(C) The measurement is accurate but not precise
(D) The measurement is not accurate but is precise
(E) The average of the values is accurate

Answer 1

The measurement is precise but not accurate.

Step-by-step explanation:

The measurements provided for the mass of the water sample are very similar, indicating precision. However, the average of the values deviates from the expected mass of 10.3 g, indicating inaccuracy. Therefore, the measurement is precise but not accurate. The average of the values is not accurate either.