A flask containing 23.21 mL of a liquid weighs 146.3 g with the liquid in the flask and 131.8 g when empty. Calculate the density of the liquid in g>mL to the correct number of significant digits.

검증된 단계별 안내

Calculate the mass of the liquid by subtracting the mass of the empty flask from the mass of the flask with the liquid: 146.3 \(\text{ g}\) - 131.8 \(\text{ g}\).

Determine the volume of the liquid, which is given as 23.21 \(\text{ mL}\).

Use the formula for density: \( \text{Density} = \frac{\text{Mass}}{\text{Volume}} \).

Substitute the mass of the liquid and the volume into the density formula.

Ensure the final answer is expressed with the correct number of significant figures based on the given data.

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주요 개념

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Density

Density is defined as the mass of a substance divided by its volume, typically expressed in grams per milliliter (g/mL) for liquids. It provides a measure of how much mass is contained in a given volume and is a crucial property for identifying substances and understanding their behavior in different contexts.

Significant Figures

Significant figures are the digits in a number that contribute to its precision. When performing calculations, especially in chemistry, it is essential to report results with the correct number of significant figures based on the precision of the measurements involved, ensuring that the final answer reflects the accuracy of the data.

Mass and Volume Measurement

In this context, mass is measured using a balance, while volume is determined using a graduated cylinder or similar device. The difference in mass between the full flask and the empty flask gives the mass of the liquid, and the volume is directly provided, allowing for the calculation of density by applying the formula density = mass/volume.