A student obtains a silvery piece of metal of an unknown identity. She weighs th
ID: 480453 • Letter: A
Question
A student obtains a silvery piece of metal of an unknown identity. She weighs the metal and the mass is 56.58 g. When she places the metal in a graduated cylinder that initially contains 25.8 mL of water, the final volume reading on the graduated cylinder is 32.2 mL Calculate the density of unknown metal sample. (Show your calculations with units.) Use the density information in your textbook or the CRC to determine the Identity of the metal from these possible unknowns: chromium, cadmium, molybdenum, nickel, or zinc. If you use the internet, cite your source. Calculate the percent error of the measured value. (Show your calculations with units.) Is the density measurement accurate? Is the density measurement precise? Explain.Explanation / Answer
From the given data
a. density of metal = 56.58 g/(32.2 - 25.8) ml = 8.84 g/ml
b. Identity of metal = Cadmium
c. % error = (8.84 - 8.87) x 100/8.7 = 1.61%
d. the measurement is thus close to being accrate and for precision we need more sets of data.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.