Question

if the known mass of an object is 2.5 grams, which of the following measurements is most accurate? 2.49 g 2.75 g 4.29 g 0.26 g

Explanation:

Step1: Calculate absolute error for 2.49 g

Absolute error is $|2.5 - 2.49| = 0.01$ g.

Step2: Calculate absolute error for 2.75 g

Absolute error is $|2.5 - 2.75| = 0.25$ g.

Step3: Calculate absolute error for 4.29 g

Absolute error is $|2.5 - 4.29| = 1.79$ g.

Step4: Calculate absolute error for 0.26 g

Absolute error is $|2.5 - 0.26| = 2.24$ g.

Step5: Compare absolute errors

The smallest absolute error is 0.01 g, corresponding to 2.49 g.

Answer:

2.49 g