{"id":208541,"date":"2025-04-27T18:56:11","date_gmt":"2025-04-27T18:56:11","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=208541"},"modified":"2025-04-27T18:56:23","modified_gmt":"2025-04-27T18:56:23","slug":"a-reaction-produces-0-819-moles-of-h2o","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/27\/a-reaction-produces-0-819-moles-of-h2o\/","title":{"rendered":"A reaction produces 0.819 moles of H2O"},"content":{"rendered":"\n<p>A reaction produces 0.819 moles of H2O. How many molecules are produced?<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Final Answer:<\/h3>\n\n\n\n<p>The number of molecules produced = <strong>4.93 \u00d7 10\u00b2\u00b3 molecules<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Full Explanation:<\/h3>\n\n\n\n<p>In this problem, you are given the amount of water produced in <strong>moles<\/strong> and asked to find out how many <strong>individual molecules<\/strong> of water (<strong>H\u2082O<\/strong>) that represents.<\/p>\n\n\n\n<p>To solve this, you need to know about <strong>Avogadro&#8217;s number<\/strong>, which is a fundamental constant in chemistry:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Avogadro&#8217;s number<\/strong> = ( 6.022 \\times 10^{23} ) particles (atoms, molecules, ions, etc.) per mole.<\/li>\n<\/ul>\n\n\n\n<p>This number tells us that <strong>one mole<\/strong> of any substance contains exactly ( 6.022 \\times 10^{23} ) of its representative particles.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 1: Set up the conversion<\/strong><\/p>\n\n\n\n<p>Since 1 mole = ( 6.022 \\times 10^{23} ) molecules, if you have 0.819 moles of H\u2082O, you can find the number of molecules by multiplying:<\/p>\n\n\n\n<p>[<br>\\text{Number of molecules} = 0.819 \\times (6.022 \\times 10^{23})<br>]<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 2: Perform the calculation<\/strong><\/p>\n\n\n\n<p>First multiply the numbers:<\/p>\n\n\n\n<p>[<br>0.819 \\times 6.022 = 4.931<br>]<\/p>\n\n\n\n<p>Then attach the ( 10^{23} ):<\/p>\n\n\n\n<p>[<br>4.931 \\times 10^{23}<br>]<\/p>\n\n\n\n<p>Thus:<\/p>\n\n\n\n<p>[<br>\\text{Number of molecules} = 4.93 \\times 10^{23} \\text{ molecules}<br>]<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 3: Double-check units<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Moles<\/strong> cancel out.<\/li>\n\n\n\n<li>The answer is correctly left in <strong>molecules<\/strong>, which is the quantity the question asked for.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Given<\/strong>: 0.819 moles of H\u2082O<\/li>\n\n\n\n<li><strong>Use<\/strong>: Avogadro\u2019s number ( (6.022 \\times 10^{23}) )<\/li>\n\n\n\n<li><strong>Multiply<\/strong>: ( 0.819 \\times 6.022 \\times 10^{23} )<\/li>\n\n\n\n<li><strong>Result<\/strong>: ( 4.93 \\times 10^{23} ) molecules of H\u2082O<\/li>\n<\/ul>\n\n\n\n<p>Understanding this process is very important because converting between <strong>moles<\/strong> and <strong>particles<\/strong> is a skill used in almost all areas of chemistry, especially when studying chemical reactions, stoichiometry, and molecular behavior!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A reaction produces 0.819 moles of H2O. How many molecules are produced? The correct answer and explanation is : Final Answer: The number of molecules produced = 4.93 \u00d7 10\u00b2\u00b3 molecules. Full Explanation: In this problem, you are given the amount of water produced in moles and asked to find out how many individual molecules [&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-208541","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208541","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=208541"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208541\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}