{"id":238158,"date":"2025-06-17T21:00:17","date_gmt":"2025-06-17T21:00:17","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=238158"},"modified":"2025-06-17T21:00:19","modified_gmt":"2025-06-17T21:00:19","slug":"what-is-the-accepted-molecular-weight-of-the-substance-benzoic-acid-c6h5cooh","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/17\/what-is-the-accepted-molecular-weight-of-the-substance-benzoic-acid-c6h5cooh\/","title":{"rendered":"What is the accepted molecular weight of the substance benzoic acid (C6H5COOH)"},"content":{"rendered":"\n

What is the accepted molecular weight of the substance benzoic acid (C6H5COOH)? Use the molecular formula to calculate the mass.<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer:<\/strong>
The accepted molecular weight (molar mass) of benzoic acid (C\u2086H\u2085COOH) is 122.12 g\/mol<\/strong>.<\/p>\n\n\n\n

Explanation:<\/strong><\/h3>\n\n\n\n

To calculate the molecular weight of benzoic acid, we use its molecular formula: C\u2086H\u2085COOH<\/strong>, which can also be written as C\u2087H\u2086O\u2082<\/strong>. This formula tells us that benzoic acid contains:<\/p>\n\n\n\n

    \n
  • 7 carbon (C) atoms<\/li>\n\n\n\n
  • 6 hydrogen (H) atoms<\/li>\n\n\n\n
  • 2 oxygen (O) atoms<\/li>\n<\/ul>\n\n\n\n

    Now, we calculate the molecular weight using the atomic masses of each element:<\/p>\n\n\n\n

      \n
    • Carbon (C): 12.01 g\/mol<\/li>\n\n\n\n
    • Hydrogen (H): 1.008 g\/mol<\/li>\n\n\n\n
    • Oxygen (O): 16.00 g\/mol<\/li>\n<\/ul>\n\n\n\n

      Step-by-step calculation:<\/h3>\n\n\n\n
        \n
      • 7 carbon atoms \u00d7 12.01 g\/mol = 84.07 g\/mol<\/li>\n\n\n\n
      • 6 hydrogen atoms \u00d7 1.008 g\/mol = 6.048 g\/mol<\/li>\n\n\n\n
      • 2 oxygen atoms \u00d7 16.00 g\/mol = 32.00 g\/mol<\/li>\n<\/ul>\n\n\n\n

        Now, add all the contributions together:<\/p>\n\n\n\n

        84.07 + 6.048 + 32.00 = 122.118 g\/mol<\/strong><\/p>\n\n\n\n

        When rounded to two decimal places, the molecular weight is 122.12 g\/mol<\/strong>.<\/p>\n\n\n\n

        Importance of Molecular Weight:<\/h3>\n\n\n\n

        Molecular weight is crucial in chemistry for converting between grams and moles, which is essential for stoichiometric calculations. In experiments involving freezing point depression, boiling point elevation, or determining colligative properties, accurate molar masses are needed for correct interpretations.<\/p>\n\n\n\n

        Benzoic acid is often used in physical chemistry experiments due to its well-defined molecular mass and stability. Its accurate molecular weight helps predict behaviors like solubility, reaction stoichiometry, and thermodynamic properties in various solvents.<\/p>\n\n\n\n

        Thus, using the molecular formula and atomic masses from the periodic table, the accepted molecular weight of benzoic acid is calculated to be 122.12 g\/mol<\/strong>.<\/p>\n\n\n\n

        \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

        What is the accepted molecular weight of the substance benzoic acid (C6H5COOH)? Use the molecular formula to calculate the mass. The Correct Answer and Explanation is: Correct Answer:The accepted molecular weight (molar mass) of benzoic acid (C\u2086H\u2085COOH) is 122.12 g\/mol. Explanation: To calculate the molecular weight of benzoic acid, we use its molecular formula: C\u2086H\u2085COOH, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-238158","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=238158"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238158\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=238158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=238158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=238158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}