Mary Smith obtained a density of 2.226 g/mL for a metal sample. Using a different method, Joseph Henry obtained a value of 2.335 g/mL for the same metal sample. Which student’s value is more accurate? Use the definition of accuracy to explain your answer.

We need true value to find out who is more accurate.

Explanation:

Precision refers to the closeness of two or more measurements to each other.

Accuracy refers to the closeness of a measured value to a standard or known value.

For Example: If you weigh a given substance five times and you get 3.0 kg each time. Then the measurement is very precise.

For Example: If the mass of a substance is 3.0 kg and one person weighed 3.05 kg and another person weighed 3.2 kg. Then, the weight measured by first person is more accurate.

According to the question:

Density measured by Mary = 2.226 g /ml

Density measured by Joseph= 2.335 g /ml

As, the standard or known value is not given, we can not know which student’s value is more accurate