Exhibit 1-1 Consider the following figure that is a blow-up view of a region of a 50 mL burette to answer the following question(s). The density of ethanol was measured in two steps. The first step involved measuring its volume using a burette. The mass of this volume was then measured.
-Refer to Exhibit 1-1. In the reported measurement above for the volume of the ethanol displaced from the burette (given in milliliters), what digit is the digit of uncertainty ?

Question

Exhibit 1-1 Consider the following figure that is a blow-up view of a region of a 50 mL burette to answer the following question(s).  The density of ethanol was measured in two steps. The first step involved measuring its volume using a burette. The mass of this volume was then measured.
-Refer to Exhibit 1-1. In the reported measurement above for the volume of the ethanol displaced from the burette (given in milliliters), what digit is the digit of uncertainty ?

Quizplus · Accepted Answer

The digit of uncertainty is the last digit that is uncertain or estimated. In this case, the burette has graduation of 0.1 mL, so the volume measured can only be estimated to the nearest 0.1 mL. Therefore, the hundredths place (0.01) is the digit of uncertainty.

Exhibit 1-1 Consider the Following Figure That Is a Blow-Up