{"id":234428,"date":"2025-06-14T06:15:03","date_gmt":"2025-06-14T06:15:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=234428"},"modified":"2025-06-14T06:15:05","modified_gmt":"2025-06-14T06:15:05","slug":"when-this-chemical-equation-al-o2-%e2%86%92-al2o3-is-balanced-the-coefficients-in-order-from-left-to-right-are-4-3-2-2-1-1-4-3-3-2-3-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/14\/when-this-chemical-equation-al-o2-%e2%86%92-al2o3-is-balanced-the-coefficients-in-order-from-left-to-right-are-4-3-2-2-1-1-4-3-3-2-3-2\/","title":{"rendered":"When this chemical equation, Al + O2 \u2192 Al2O3, is balanced, the coefficients (in order from left to right) are 4, 3, 2 2, 1, 1 4, 3, 3 2, 3, 2"},"content":{"rendered":"\n<p><br>When this chemical equation, Al + O2 \u2192 Al2O3, is balanced, the coefficients (in order from left to right) are 4, 3, 2 2, 1, 1 4, 3, 3 2, 3, 2<\/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>The correct answer is: <strong>4, 3, 2<\/strong><\/p>\n\n\n\n<p>That means the <strong>balanced equation is<\/strong>:<\/p>\n\n\n\n<p><strong>4Al + 3O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Detailed Explanation (Textbook Style):<\/h3>\n\n\n\n<p>Balancing chemical equations is essential in chemistry because it reflects the <strong>Law of Conservation of Mass<\/strong>, which states that matter cannot be created or destroyed in a chemical reaction. Therefore, the number of atoms for each element must be the same on both sides of the equation.<\/p>\n\n\n\n<p>Let\u2019s break down the process of balancing the unbalanced chemical equation:<\/p>\n\n\n\n<p><strong>Unbalanced Equation:<\/strong><\/p>\n\n\n\n<p><strong>Al + O\u2082 \u2192 Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Count atoms on both sides<\/h3>\n\n\n\n<p>Start by analyzing the number of atoms for each element:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Left side:<\/strong><br>Al = 1<br>O = 2 (from O\u2082)<\/li>\n\n\n\n<li><strong>Right side (in Al\u2082O\u2083):<\/strong><br>Al = 2<br>O = 3<\/li>\n<\/ul>\n\n\n\n<p>As we can see, the atoms do not match, so we must find coefficients (whole numbers in front of each compound or element) to make them equal.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Balance aluminum (Al)<\/h3>\n\n\n\n<p>There are 2 Al atoms in <strong>Al\u2082O\u2083<\/strong>, so to balance Al on the left side, we place a <strong>4<\/strong> in front of Al:<\/p>\n\n\n\n<p><strong>4Al + O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<p>This gives:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Al = 4 (on the left)<\/li>\n\n\n\n<li>Al = 4 (from 2 \u00d7 Al\u2082 on the right) \u2705<\/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\">Step 3: Balance oxygen (O)<\/h3>\n\n\n\n<p>There are 3 oxygen atoms in <strong>1<\/strong> Al\u2082O\u2083, so in <strong>2Al\u2082O\u2083<\/strong>, we have:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O = 2 \u00d7 3 = 6<\/li>\n<\/ul>\n\n\n\n<p>On the left, O\u2082 has 2 oxygen atoms. To get 6 atoms, we place a <strong>3<\/strong> in front of O\u2082:<\/p>\n\n\n\n<p><strong>4Al + 3O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<p>Now:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O = 3 \u00d7 2 = 6 (on the left)<\/li>\n\n\n\n<li>O = 6 (on the right) \u2705<\/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\">Final Check:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Al: 4 on both sides \u2705<\/li>\n\n\n\n<li>O: 6 on both sides \u2705<\/li>\n<\/ul>\n\n\n\n<p>The equation is now fully balanced.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Final Balanced Equation:<\/h3>\n\n\n\n<p><strong>4Al + 3O\u2082 \u2192 2Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<p>So, the correct coefficients <strong>in order from left to right<\/strong> are:<\/p>\n\n\n\n<p><strong>4, 3, 2<\/strong> \u2705<\/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-banner8-406.jpeg\" alt=\"\" class=\"wp-image-234429\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>When this chemical equation, Al + O2 \u2192 Al2O3, is balanced, the coefficients (in order from left to right) are 4, 3, 2 2, 1, 1 4, 3, 3 2, 3, 2 The Correct Answer and Explanation is: The correct answer is: 4, 3, 2 That means the balanced equation is: 4Al + 3O\u2082 \u2192 [&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 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