{"id":218276,"date":"2025-05-23T14:07:02","date_gmt":"2025-05-23T14:07:02","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=218276"},"modified":"2025-05-23T14:07:04","modified_gmt":"2025-05-23T14:07:04","slug":"number-of-n-atoms-in-0-650mol-nh3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/23\/number-of-n-atoms-in-0-650mol-nh3\/","title":{"rendered":"Number of N atoms in 0.650mol NH3."},"content":{"rendered":"\n

Number of N atoms in 0.650mol NH3.<\/p>\n\n\n\n

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

Correct Answer:<\/h3>\n\n\n\n

To find the number of nitrogen atoms in 0.650 mol<\/strong> of ammonia (NH\u2083), we follow this step:<\/p>\n\n\n\n

Each NH\u2083 molecule contains 1 nitrogen atom<\/strong>.<\/p>\n\n\n\n

So, in 0.650 mol of NH\u2083<\/strong>, there are: 0.650 mol NH\u2083\u00d76.022\u00d71023 molecules1 mol\u00d71 N atom1 NH\u2083 molecule=3.91\u00d71023 N atoms0.650 \\text{ mol NH\u2083} \\times \\frac{6.022 \\times 10^{23} \\text{ molecules}}{1 \\text{ mol}} \\times \\frac{1 \\text{ N atom}}{1 \\text{ NH\u2083 molecule}} = 3.91 \\times 10^{23} \\text{ N atoms}<\/p>\n\n\n\n

Final Answer:<\/h3>\n\n\n\n

3.91 \u00d7 10\u00b2\u00b3 nitrogen atoms<\/strong><\/p>\n\n\n\n

\n\n\n\n

<\/h3>\n\n\n\n

In chemistry, the mole (mol) is a fundamental unit used to express amounts of a chemical substance. One mole of any substance contains Avogadro\u2019s number<\/strong> of entities (atoms, molecules, ions, etc.), which is 6.022 \u00d7 10\u00b2\u00b3<\/strong>. This very large number helps us translate between the microscopic scale of atoms and molecules and the macroscopic scale we observe in the laboratory.<\/p>\n\n\n\n

Ammonia (NH\u2083) is a molecule composed of 1 nitrogen (N) atom<\/strong> and 3 hydrogen (H) atoms<\/strong>. So for each individual molecule of NH\u2083, there is exactly one nitrogen atom.<\/p>\n\n\n\n

When we are told we have 0.650 moles of NH\u2083<\/strong>, we can use Avogadro\u2019s number to calculate the total number of molecules in that sample: 0.650 mol\u00d76.022\u00d71023 molecules\/mol=3.9143\u00d71023 molecules0.650 \\text{ mol} \\times 6.022 \\times 10^{23} \\text{ molecules\/mol} = 3.9143 \\times 10^{23} \\text{ molecules}<\/p>\n\n\n\n

Since each molecule contains one nitrogen atom<\/strong>, the number of nitrogen atoms is the same as the number of molecules: 3.9143\u00d71023 nitrogen atoms3.9143 \\times 10^{23} \\text{ nitrogen atoms}<\/p>\n\n\n\n

Rounding to three significant figures, which matches the precision of the given quantity (0.650 mol), we get: 3.91\u00d71023 nitrogen atoms\\boxed{3.91 \\times 10^{23} \\text{ nitrogen atoms}}<\/p>\n\n\n\n

This problem emphasizes a key point in stoichiometry: the mole-to-particle relationship<\/strong> is essential for converting between macroscopic quantities (like grams or moles) and the microscopic world (like atoms or molecules).<\/p>\n\n\n\n

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

Number of N atoms in 0.650mol NH3. The Correct Answer and Explanation is: Correct Answer: To find the number of nitrogen atoms in 0.650 mol of ammonia (NH\u2083), we follow this step: Each NH\u2083 molecule contains 1 nitrogen atom. So, in 0.650 mol of NH\u2083, there are: 0.650 mol NH\u2083\u00d76.022\u00d71023 molecules1 mol\u00d71 N atom1 NH\u2083 molecule=3.91\u00d71023 N atoms0.650 \\text{ mol NH\u2083} \\times \\frac{6.022 \\times 10^{23} […]<\/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-218276","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218276","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=218276"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218276\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=218276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=218276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=218276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}