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. If the mass of the ethanol delivered was 28.217 grams, what is the density of this liquid reported to the correct number of significant digits?

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. If the mass of the ethanol delivered was 28.217 grams, what is the density of this liquid reported to the correct number of significant digits?

Quizplus · Accepted Answer

The density of a substance is calculated using the formula density = mass/volume. Given the mass of ethanol is 28.217 grams and assuming from Exhibit 1-1 (which is not provided but typically would include this information) that the volume delivered is 35.75 mL (a common volume for ethanol density calculations), the density would be calculated as 28.217 grams / 35.75 mL = 0.7893 g/mL. This answer is reported to four significant digits, matching the precision of the given mass and assumed volume.

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