Chapter 2: Problem 46
Define accuracy and precision.
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These are the key concepts you need to understand to accurately answer the question.
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Chapter 2: Problem 46
Define accuracy and precision.
These are the key concepts you need to understand to accurately answer the question.
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The accepted density for copper is 8.96 g/mL. Calculate the percent error for each of these measurements. \(\begin{array}{ll}{\text { a. } 8.86 \mathrm{g} / \mathrm{mL}} & {\text { c. } 9.00 \mathrm{g} / \mathrm{mL}} \\ {\text { b. } 8.92 \mathrm{g} / \mathrm{mL}} & {\text { d. } 8.98 \mathrm{g} / \mathrm{mL}}\end{array}\)
Determine the number of significant figures in each measurement \(\begin{array}{ll}{\text { a. } 508.0 L} & {\text { c. } 1.0200 \times 10^{5} \mathrm{kg}} \\ {\text { b. } 820,400.0 \mathrm{L}} & {\text { d. } 807,000 \mathrm{kg}}\end{array}\)
Zinc Two separate masses of zinc were measured on a laboratory balance. The first zinc sample had a mass of 210.10 g, and the second zinc sample had a mass of 235.10 g. The two samples were combined. The volume of the combined sample was found to be 62.3 \(\mathrm{mL}\) . Express the mass and density of the zinc sample in the correct number of significant figures.
When multiplying 602.4 \(\mathrm{m}\) by \(3.72 \mathrm{m},\) which value determines the number of significant figures in the answer? Explain.
Challenge Vinegar is 5\(\%\) acetic acid by mass and has a density of 1.02 \(\mathrm{g} / \mathrm{mL}\) .What mass of acetic acid, in grams, is present in 185 \(\mathrm{mL}\) of vinegar?
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