{"id":233431,"date":"2025-06-13T06:20:49","date_gmt":"2025-06-13T06:20:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233431"},"modified":"2025-06-13T06:20:52","modified_gmt":"2025-06-13T06:20:52","slug":"what-is-the-molar-mass-of-p-4","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/13\/what-is-the-molar-mass-of-p-4\/","title":{"rendered":"What is the molar mass of P 4"},"content":{"rendered":"\n<p> What is the molar mass of P 4<br>? 123.9 g 31.00 g 60.53 g 6.02<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answer: 123.9 g\/mol<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (Textbook Style):<\/strong><\/h3>\n\n\n\n<p>To calculate the <strong>molar mass<\/strong> of a compound or molecule, we add together the atomic masses of all atoms present in one mole of that substance. In this case, the molecule is <strong>P\u2084<\/strong>, which is a molecule made up of <strong>four phosphorus (P)<\/strong> atoms.<\/p>\n\n\n\n<p>The <strong>atomic mass<\/strong> of a single phosphorus atom is approximately <strong>31.00 g\/mol<\/strong> (as found on the periodic table).Molar&nbsp;mass&nbsp;of&nbsp;P\u2084=4\u00d7Atomic&nbsp;mass&nbsp;of&nbsp;P=4\u00d731.00\u2009g\/mol=124.00\u2009g\/mol\\text{Molar mass of P\u2084} = 4 \\times \\text{Atomic mass of P} = 4 \\times 31.00 \\, \\text{g\/mol} = 124.00 \\, \\text{g\/mol}Molar&nbsp;mass&nbsp;of&nbsp;P\u2084=4\u00d7Atomic&nbsp;mass&nbsp;of&nbsp;P=4\u00d731.00g\/mol=124.00g\/mol<\/p>\n\n\n\n<p>However, due to rounding differences in atomic masses (sometimes listed as 30.97 g\/mol), the accepted molar mass of P\u2084 is typically cited as <strong>123.9 g\/mol<\/strong> in chemistry references and textbooks.<\/p>\n\n\n\n<p>This means that <strong>one mole of P\u2084 molecules<\/strong> (which contains 6.022\u00d710236.022 \\times 10^{23}6.022\u00d71023 molecules, based on Avogadro\u2019s number) weighs <strong>123.9 grams<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Understanding the Choices:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>31.00 g<\/strong> \u2014 This is the mass of <strong>one atom<\/strong> of phosphorus (not P\u2084).<\/li>\n\n\n\n<li><strong>60.53 g<\/strong> \u2014 Incorrect and does not relate directly to any molar relationship in P\u2084.<\/li>\n\n\n\n<li><strong>6.02<\/strong> \u2014 Possibly confused with <strong>Avogadro&#8217;s number (6.022 \u00d7 10\u00b2\u00b3)<\/strong>, not a mass.<\/li>\n\n\n\n<li>\u2705 <strong>123.9 g<\/strong> \u2014 <strong>Correct answer<\/strong>: The molar mass of <strong>P\u2084<\/strong> (tetraphosphorus).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>In conclusion, the correct molar mass of <strong>P\u2084<\/strong> is <strong>123.9 g\/mol<\/strong>, calculated by multiplying the atomic mass of phosphorus by 4. This value is essential in stoichiometry and chemical calculations involving molecular phosphorus.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-237.jpeg\" alt=\"\" class=\"wp-image-233432\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What is the molar mass of P 4? 123.9 g 31.00 g 60.53 g 6.02 The Correct Answer and Explanation is: Correct Answer: 123.9 g\/mol Explanation (Textbook Style): To calculate the molar mass of a compound or molecule, we add together the atomic masses of all atoms present in one mole of that substance. In [&hellip;]<\/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-233431","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233431","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=233431"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233431\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}