{"id":266,"date":"2025-07-01T03:24:15","date_gmt":"2025-07-01T03:24:15","guid":{"rendered":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/?post_type=chapter&#038;p=266"},"modified":"2026-01-09T19:47:39","modified_gmt":"2026-01-09T19:47:39","slug":"post-lab-questions-5","status":"web-only","type":"chapter","link":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/chapter\/post-lab-questions-5\/","title":{"raw":"Post-Lab Questions","rendered":"Post-Lab Questions"},"content":{"raw":"<h2>Directions: Answer each of the following questions. All work must be shown to receive credit for calculations.<\/h2>\r\n<ol>\r\n \t<li>Compare your measurements from metric ruler 1 and metric ruler 2. Which ruler allowed you to report measurements with more significant figures? \u00a0Why is this the case?<\/li>\r\n \t<li>Looking at the area calculations from both sets of data (Metric Rulers 1 and 2), did the level of precision in your original measurements affect the number of significant figures in the calculated area? Provide one example from your data tables.<\/li>\r\n \t<li>A lab partner uses metric ruler 1 to measure a rectangle and reports a length of 4.36 cm. Based on what you know about metric ruler 1\u2019s precision, explain whether this is a reasonable measurement. What would be a more appropriate way to record this value?<\/li>\r\n \t<li>Two students calculate the perimeter of the same rectangle using measurements from metric ruler 1. Which answer is more appropriate, and why? What does the difference in significant figures communicate about the precision of their measurements?<\/li>\r\n<\/ol>\r\n<ul>\r\n \t<li data-start=\"1025\" data-end=\"1046\">Student A: 24.3 cm<\/li>\r\n \t<li data-start=\"1050\" data-end=\"1227\">\r\n<p data-start=\"1052\" data-end=\"1227\">Student B: 24.30 cm<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1052\" data-end=\"1227\">\u00a0 \u00a0 \u00a0 5. During the lab, you used a ruler where the smallest scale division was 0.1 cm. Suppose you measured the length of a rectangle and found it to be exactly 3.2 cm according to the markings. How should you record this measurement to correctly reflect the uncertainty based on the tool's precision?<\/p>\r\n\r\n<h3><strong>Licenses and Attribution<\/strong><\/h3>\r\n<h4>CC Licensed Content, Original<\/h4>\r\n<span data-teams=\"true\">This educational material includes AI-generated content from ChatGPT by OpenAI. The original content created by Carol Stallworth from Hillsborough Community College is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (<a id=\"menur5so\" class=\"fui-Link ___1q1shib f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1s184ao f1mk8lai fnbmjn9 f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/deed.en\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/deed.en\" rel=\"noreferrer noopener\" aria-label=\"Link CC BY-NC 4.0\">CC BY-NC 4.0<\/a>).<\/span>\r\n\r\nAll images in this textbook generated with DALL-E are licensed under the terms provided by OpenAI, allowing for their free use, modification, and distribution with appropriate attribution.","rendered":"<h2>Directions: Answer each of the following questions. All work must be shown to receive credit for calculations.<\/h2>\n<ol>\n<li>Compare your measurements from metric ruler 1 and metric ruler 2. Which ruler allowed you to report measurements with more significant figures? \u00a0Why is this the case?<\/li>\n<li>Looking at the area calculations from both sets of data (Metric Rulers 1 and 2), did the level of precision in your original measurements affect the number of significant figures in the calculated area? Provide one example from your data tables.<\/li>\n<li>A lab partner uses metric ruler 1 to measure a rectangle and reports a length of 4.36 cm. Based on what you know about metric ruler 1\u2019s precision, explain whether this is a reasonable measurement. What would be a more appropriate way to record this value?<\/li>\n<li>Two students calculate the perimeter of the same rectangle using measurements from metric ruler 1. Which answer is more appropriate, and why? What does the difference in significant figures communicate about the precision of their measurements?<\/li>\n<\/ol>\n<ul>\n<li data-start=\"1025\" data-end=\"1046\">Student A: 24.3 cm<\/li>\n<li data-start=\"1050\" data-end=\"1227\">\n<p data-start=\"1052\" data-end=\"1227\">Student B: 24.30 cm<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1052\" data-end=\"1227\">\u00a0 \u00a0 \u00a0 5. During the lab, you used a ruler where the smallest scale division was 0.1 cm. Suppose you measured the length of a rectangle and found it to be exactly 3.2 cm according to the markings. How should you record this measurement to correctly reflect the uncertainty based on the tool&#8217;s precision?<\/p>\n<h3><strong>Licenses and Attribution<\/strong><\/h3>\n<h4>CC Licensed Content, Original<\/h4>\n<p><span data-teams=\"true\">This educational material includes AI-generated content from ChatGPT by OpenAI. The original content created by Carol Stallworth from Hillsborough Community College is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (<a id=\"menur5so\" class=\"fui-Link ___1q1shib f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1s184ao f1mk8lai fnbmjn9 f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/deed.en\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/deed.en\" rel=\"noreferrer noopener\" aria-label=\"Link CC BY-NC 4.0\">CC BY-NC 4.0<\/a>).<\/span><\/p>\n<p>All images in this textbook generated with DALL-E are licensed under the terms provided by OpenAI, allowing for their free use, modification, and distribution with appropriate attribution.<\/p>\n","protected":false},"author":125,"menu_order":4,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-266","chapter","type-chapter","status-web-only","hentry"],"part":257,"_links":{"self":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapters\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/wp\/v2\/users\/125"}],"version-history":[{"count":22,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapters\/266\/revisions"}],"predecessor-version":[{"id":981,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapters\/266\/revisions\/981"}],"part":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/parts\/257"}],"metadata":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapters\/266\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/wp\/v2\/media?parent=266"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/pressbooks\/v2\/chapter-type?post=266"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/wp\/v2\/contributor?post=266"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/wp-json\/wp\/v2\/license?post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}