{"id":234905,"date":"2025-06-14T14:48:35","date_gmt":"2025-06-14T14:48:35","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=234905"},"modified":"2025-06-14T14:48:36","modified_gmt":"2025-06-14T14:48:36","slug":"what-will-be-the-mass-of-100-atoms-of-hydrogen","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/14\/what-will-be-the-mass-of-100-atoms-of-hydrogen\/","title":{"rendered":"What will be the mass of 100 atoms of hydrogen"},"content":{"rendered":"\n<p>What will be the mass of 100 atoms of hydrogen? A. 100 g B. 1.66 \u00d7 10^-22 g C. 6.023 \u00d7 10^23 g D. 100 \u00d7 6.023 \u00d7 10^23 g<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answer: B. 1.66 \u00d7 10\u207b\u00b2\u00b2 g<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>To determine the mass of 100 atoms of hydrogen, begin by recalling that the mass of one hydrogen atom is approximately <strong>1.66 \u00d7 10\u207b\u00b2\u2074 grams<\/strong>. This value originates from dividing the molar mass of hydrogen (1.008 g\/mol) by <strong>Avogadro\u2019s number<\/strong>, which is <strong>6.022 \u00d7 10\u00b2\u00b3 atoms\/mol<\/strong>. Mass&nbsp;of&nbsp;one&nbsp;hydrogen&nbsp;atom\u22481.008&nbsp;g\/mol6.022\u00d71023&nbsp;atoms\/mol\u22481.66\u00d710\u221224&nbsp;g\\text{Mass of one hydrogen atom} \u2248 \\frac{1.008\\ \\text{g\/mol}}{6.022 \u00d7 10^{23}\\ \\text{atoms\/mol}} \u2248 1.66 \u00d7 10^{-24}\\ \\text{g}Mass&nbsp;of&nbsp;one&nbsp;hydrogen&nbsp;atom\u22486.022\u00d71023&nbsp;atoms\/mol1.008&nbsp;g\/mol\u200b\u22481.66\u00d710\u221224&nbsp;g<\/p>\n\n\n\n<p>To find the mass of 100 hydrogen atoms, multiply the mass of one atom by 100: Mass&nbsp;of&nbsp;100&nbsp;H&nbsp;atoms=100\u00d71.66\u00d710\u221224&nbsp;g=1.66\u00d710\u221222&nbsp;g\\text{Mass of 100 H atoms} = 100 \u00d7 1.66 \u00d7 10^{-24}\\ \\text{g} = 1.66 \u00d7 10^{-22}\\ \\text{g}Mass&nbsp;of&nbsp;100&nbsp;H&nbsp;atoms=100\u00d71.66\u00d710\u221224&nbsp;g=1.66\u00d710\u221222&nbsp;g<\/p>\n\n\n\n<p>Thus, the correct answer is <strong>option B<\/strong>.<\/p>\n\n\n\n<p>The other options are incorrect for the following reasons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Option A (100 g):<\/strong> This represents the approximate mass of <strong>100 moles<\/strong> of hydrogen atoms, not 100 individual atoms. One mole contains <strong>6.022 \u00d7 10\u00b2\u00b3 atoms<\/strong>, far more than 100.<\/li>\n\n\n\n<li><strong>Option C (6.023 \u00d7 10\u00b2\u00b3 g):<\/strong> This is a misrepresentation; it implies that the mass of <strong>one mole of hydrogen atoms<\/strong> is <strong>6.023 \u00d7 10\u00b2\u00b3 grams<\/strong>, which is incorrect. The mass of one mole of hydrogen atoms is only about <strong>1 gram<\/strong>.<\/li>\n\n\n\n<li><strong>Option D (100 \u00d7 6.023 \u00d7 10\u00b2\u00b3 g):<\/strong> This equals <strong>6.023 \u00d7 10\u00b2\u2075 g<\/strong>, which suggests an enormous and unrealistic quantity of hydrogen. This does not match the problem&#8217;s scale of just 100 atoms.<\/li>\n<\/ul>\n\n\n\n<p>By careful use of atomic mass and Avogadro\u2019s number, the true mass of 100 hydrogen atoms is best represented by <strong>1.66 \u00d7 10\u207b\u00b2\u00b2 grams<\/strong>.<\/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-banner8-524.jpeg\" alt=\"\" class=\"wp-image-234906\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What will be the mass of 100 atoms of hydrogen? A. 100 g B. 1.66 \u00d7 10^-22 g C. 6.023 \u00d7 10^23 g D. 100 \u00d7 6.023 \u00d7 10^23 g The Correct Answer and Explanation is: Correct Answer: B. 1.66 \u00d7 10\u207b\u00b2\u00b2 g To determine the mass of 100 atoms of hydrogen, begin by recalling [&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-234905","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234905","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=234905"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/234905\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=234905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=234905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=234905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}