Four research teams measured the density of a new alloy, and what each team wrote in its team notebook is shown in the table below. Suppose a later and more reliable measurement gives 10.7 g cm³ for the density of the same alloy. Decide which of the earlier measurements was the most accurate, and which was the most precise. team A B C D what was written in the notebook *8.7g/cm³ "9.7g/cm² ± 0.2g cm² 10.9g/cm² ± 9.0% "between 11.2g/cm² and 12.2g cm²³- most accurate most precise measurement measurement O O O 0 000 X 5

Four research teams measured the density of a new alloy, and what each team wrote in its team notebook is shown in the table below. Suppose a later and more reliable measurement gives 10.7 g cm³ for the density of the same alloy. Decide which of the earlier measurements was the most accurate, and which was the most precise. team A B C D what was written in the notebook *8.7g/cm³ "9.7g/cm² ± 0.2g cm² 10.9g/cm² ± 9.0% "between 11.2g/cm² and 12.2g cm²³- most accurate most precise measurement measurement O O O 0 000 X 5

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 113CP: On October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120)....

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On October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120). Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2% Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass. Does this account for the difference in mass among die pennies in Exercise 120? Assume the volume of the individual metals that make up each penny can be added together to give the overall volume of the penny, and assume each penny is the same size. (Density of Cu = 8.96 g/cm3; density of Zn = 7.14 g/cm3).
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Four research teams measured the density of a new alloy, and what each team wrote in its team notebook is shown in the table below. 3 Suppose a later and more reliable measurement gives 3.1 g/cm³ for the density of the same alloy. Decide which of the earlier measurements was the most accurate, and which was the most precise. team A B C D what was written in the notebook 3,₁₁ "2.1 g/cm³ "between 3.6g/cm³ and 4.6g/cm³ 3,₁₁ 3 3,₁₁ "2.9g/cm³ +1.0g/cm³ "1.1 g/cm³ ± 20.%" most precise most accurate measurement measurement OO X Ś
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A hypothetical metal has a theoretical density of 11.47 g/cm3. This metal adopts a cubic crystal structure with an edge length of 0.387 nm and atomic radius of 0.137 nm. Find the atomic weight of this metal in g/mol. NA = 6.022 x 1023 atoms/mol. Express your answer in two decimal places only. Do not put the units.
Four research teams measured the density of a new alloy, and what each team wrote in its team notebook is shown in the table below. 3 Suppose a later and more reliable measurement gives 7.70 g/cm° for the density of the same alloy. Decide which of the earlier measurements was the most accurate, and which was the most precise. what was written most accurate most precise team in the notebook measurement measurement A 3 "between 7.75g/cm° and 7.85g/cm³" 3 В "7.72g/cm° ± 0.02g/cm` %3D C "7.6g/cm³" 3 D "7.50g/cm°± 0.10%"