Fe + O2 \u2192 Fe2O3 This equation is unbalanced. Which of the following is the correct balanced equation for this reaction? A. 4Fe + 3O2 \u2192 2Fe2O3 B. 3Fe + 4O2 \u2192 2Fe2O3 C. 2Fe + 4O2 \u2192 3Fe2O3 D. 3Fe + 3O2 \u2192 4Fe2O3 E. 4Fe + 4O2 \u2192 3Fe2O3<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct answer is: A. 4Fe + 3O\u2082 \u2192 2Fe\u2082O\u2083<\/strong><\/p>\n\n\n\n To balance a chemical equation, we must ensure that the number of atoms of each element is the same on both sides of the equation. In this reaction, iron (Fe) reacts with oxygen (O\u2082) to form iron(III) oxide (Fe\u2082O\u2083). Here\u2019s how we balance it step-by-step:<\/p>\n\n\n\n The unbalanced equation for the reaction is: In the compound Fe\u2082O\u2083, there are 2 atoms of Fe. To balance the Fe atoms, we need 2 Fe atoms on the reactant side: In Fe\u2082O\u2083, there are 3 oxygen atoms. However, on the reactant side, oxygen is in the form of O\u2082 molecules, so we have pairs of oxygen atoms. To balance the oxygen, we need to make the total number of oxygen atoms on both sides equal.<\/p>\n\n\n\n Since each O\u2082 molecule has 2 oxygen atoms, we can use 3 O\u2082 molecules to get a total of 6 oxygen atoms: To balance the iron atoms, we need a total of 4 Fe atoms on the reactant side to match 2 molecules of Fe\u2082O\u2083: Now, we have 4 Fe atoms and 6 O atoms on both sides. This makes the equation: This is the balanced equation, confirming that option A is correct. Balancing chemical equations is essential to reflect the conservation of mass, ensuring that atoms are neither created nor destroyed in chemical reactions.<\/p>\n","protected":false},"excerpt":{"rendered":" Fe + O2 \u2192 Fe2O3 This equation is unbalanced. Which of the following is the correct balanced equation for this reaction? A. 4Fe + 3O2 \u2192 2Fe2O3 B. 3Fe + 4O2 \u2192 2Fe2O3 C. 2Fe + 4O2 \u2192 3Fe2O3 D. 3Fe + 3O2 \u2192 4Fe2O3 E. 4Fe + 4O2 \u2192 3Fe2O3 The Correct Answer and […]<\/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-161564","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/161564","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=161564"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/161564\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=161564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=161564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=161564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation<\/h3>\n\n\n\n
Step 1: Write the Unbalanced Equation<\/h4>\n\n\n\n
[
\\text{Fe} + \\text{O}_2 \\rightarrow \\text{Fe}_2\\text{O}_3
]<\/p>\n\n\n\nStep 2: Balance the Iron (Fe) Atoms<\/h4>\n\n\n\n
[
2\\text{Fe} + \\text{O}_2 \\rightarrow \\text{Fe}_2\\text{O}_3
]
This equation is still unbalanced because the oxygen atoms do not match on both sides.<\/p>\n\n\n\nStep 3: Balance the Oxygen (O) Atoms<\/h4>\n\n\n\n
[
2\\text{Fe} + 3\\text{O}_2 \\rightarrow \\text{Fe}_2\\text{O}_3
]
Now, we have balanced the oxygen, but we need more iron atoms on the reactant side.<\/p>\n\n\n\nStep 4: Adjust Iron Atoms to Match<\/h4>\n\n\n\n
[
4\\text{Fe} + 3\\text{O}_2 \\rightarrow 2\\text{Fe}_2\\text{O}_3
]<\/p>\n\n\n\nFinal Balanced Equation<\/h4>\n\n\n\n
[
4\\text{Fe} + 3\\text{O}_2 \\rightarrow 2\\text{Fe}_2\\text{O}_3
]<\/p>\n\n\n\n