Final answer:
The mass of the piece of glass is 67.95 g, which is provided in the question. For the jewelry example, the density is found to be 10.52 g/cm³, and it could potentially be made of silver based on the density.
Step-by-step explanation:
The student is asking about the mass of a piece of glass that they have measured. However, the mass has already been given as 67.95 g. The confusion seems to come from the presentation of information which includes measurements of length, height, and width and their relevance to the calculation of density, not mass. Regardless, given the mass of the glass is stated in the question, the correct answer is already provided, which is 67.95 g.
To address the provided example problem relating to jewelry:
- Determine the density of this piece of jewelry: Density is calculated as mass divided by volume. To find the volume of the jewelry, we calculate the difference in water level in the graduated cylinder before and after submerging the jewelry (61.2 mL - 48.6 mL = 12.6 mL). Converting the volume to cubic centimeters (since 1 mL = 1 cm³) and using the given mass (132.6 g), the density is density = mass / volume = 132.6 g / 12.6 cm³ = 10.52 g/cm³.
- Assuming that the jewelry is made from only one substance, what substance is it likely to be? Comparing the calculated density with common densities for various materials, the jewelry could potentially be made of silver, which has a density approximately in the range of that calculated density.