{"id":36518,"date":"2025-06-25T07:48:46","date_gmt":"2025-06-25T07:48:46","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=36518"},"modified":"2025-06-25T07:48:48","modified_gmt":"2025-06-25T07:48:48","slug":"which-of-these-compounds-contains-the-greatest-mass-percentage-of-nitrogen","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/which-of-these-compounds-contains-the-greatest-mass-percentage-of-nitrogen\/","title":{"rendered":"Which of these compounds contains the greatest mass percentage of nitrogen"},"content":{"rendered":"\n

Which of these compounds contains the greatest mass percentage of nitrogen? <\/p>\n\n\n\n

Select one: a. CH3NH2 b. NaNH2 c. Al(CN)3 d. Pb(N3)2<\/p>\n\n\n\n

The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is: d. Pb(N\u2083)\u2082<\/strong><\/p>\n\n\n\n

\n\n\n\n

To find which compound contains the greatest mass percentage of nitrogen, we need to calculate the mass percentage of nitrogen<\/strong> in each compound. This is done using the formula:<\/p>\n\n\n\n

Mass % of nitrogen = (Total mass of nitrogen atoms in the compound \u00f7 Molar mass of the compound) \u00d7 100<\/strong><\/p>\n\n\n\n

a. CH\u2083NH\u2082 (Methylamine)<\/h3>\n\n\n\n
    \n
  • C: 12.01 g\/mol<\/li>\n\n\n\n
  • H: 5 \u00d7 1.008 = 5.04 g\/mol<\/li>\n\n\n\n
  • N: 14.01 g\/mol<\/li>\n\n\n\n
  • Total molar mass = 12.01 + 5.04 + 14.01 = 31.06 g\/mol<\/li>\n\n\n\n
  • Nitrogen mass = 14.01 g<\/li>\n\n\n\n
  • %N = (14.01 \/ 31.06) \u00d7 100 \u2248 45.1%<\/strong><\/li>\n<\/ul>\n\n\n\n

    b. NaNH\u2082 (Sodium amide)<\/h3>\n\n\n\n
      \n
    • Na: 22.99 g\/mol<\/li>\n\n\n\n
    • N: 14.01 g\/mol<\/li>\n\n\n\n
    • H: 2 \u00d7 1.008 = 2.016 g\/mol<\/li>\n\n\n\n
    • Total molar mass = 22.99 + 14.01 + 2.016 = 39.02 g\/mol<\/li>\n\n\n\n
    • %N = (14.01 \/ 39.02) \u00d7 100 \u2248 35.9%<\/strong><\/li>\n<\/ul>\n\n\n\n

      c. Al(CN)\u2083 (Aluminum cyanide)<\/h3>\n\n\n\n
        \n
      • Al: 26.98 g\/mol<\/li>\n\n\n\n
      • CN: 3 \u00d7 (12.01 + 14.01) = 3 \u00d7 26.02 = 78.06 g\/mol<\/li>\n\n\n\n
      • Total molar mass = 26.98 + 78.06 = 105.04 g\/mol<\/li>\n\n\n\n
      • Nitrogen: 3 \u00d7 14.01 = 42.03 g<\/li>\n\n\n\n
      • %N = (42.03 \/ 105.04) \u00d7 100 \u2248 40.0%<\/strong><\/li>\n<\/ul>\n\n\n\n

        d. Pb(N\u2083)\u2082 (Lead azide)<\/h3>\n\n\n\n
          \n
        • Pb: 207.2 g\/mol<\/li>\n\n\n\n
        • N\u2083: 2 \u00d7 (3 \u00d7 14.01) = 2 \u00d7 42.03 = 84.06 g\/mol<\/li>\n\n\n\n
        • Total molar mass = 207.2 + 84.06 = 291.26 g\/mol<\/li>\n\n\n\n
        • %N = (84.06 \/ 291.26) \u00d7 100 \u2248 28.9%<\/strong><\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          Although CH\u2083NH\u2082 has a high percentage, it is actually CH\u2083NH\u2082 that has the highest nitrogen mass percentage<\/strong>, not Pb(N\u2083)\u2082.<\/p>\n\n\n\n

          Correction:<\/strong>
          Let us compare the results again:<\/p>\n\n\n\n

            \n
          • a. CH\u2083NH\u2082 \u2192 45.1%<\/li>\n\n\n\n
          • b. NaNH\u2082 \u2192 35.9%<\/li>\n\n\n\n
          • c. Al(CN)\u2083 \u2192 40.0%<\/li>\n\n\n\n
          • d. Pb(N\u2083)\u2082 \u2192 28.9%<\/li>\n<\/ul>\n\n\n\n

            Correct Answer: a. CH\u2083NH\u2082<\/strong><\/p>\n\n\n\n

            \n\n\n\n

            Final Answer: a. CH\u2083NH\u2082<\/strong><\/h3>\n\n\n\n

            Explanation:<\/strong>
            CH\u2083NH\u2082 (methylamine) has the highest nitrogen mass percentage because its molecular mass is relatively low while it contains one nitrogen atom. When calculating mass percentages, compounds with small molar masses and a significant portion made up of nitrogen tend to have higher nitrogen percentages. Even though Pb(N\u2083)\u2082 contains more nitrogen atoms, its very heavy lead atom reduces the overall percentage contribution from nitrogen. Therefore, CH\u2083NH\u2082 contains the greatest mass percentage of nitrogen.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Which of these compounds contains the greatest mass percentage of nitrogen? Select one: a. CH3NH2 b. NaNH2 c. Al(CN)3 d. Pb(N3)2 The correct answer and explanation is: The correct answer is: d. Pb(N\u2083)\u2082 To find which compound contains the greatest mass percentage of nitrogen, we need to calculate the mass percentage of nitrogen in each […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36518","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=36518"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36518\/revisions"}],"predecessor-version":[{"id":36521,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/36518\/revisions\/36521"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=36518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=36518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=36518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}