{"id":43306,"date":"2025-06-29T17:55:33","date_gmt":"2025-06-29T17:55:33","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=43306"},"modified":"2025-06-29T17:55:34","modified_gmt":"2025-06-29T17:55:34","slug":"washing-soda-or-sodium-carbonate-na2co3-has-a-molar-mass-of-105-988-g","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/washing-soda-or-sodium-carbonate-na2co3-has-a-molar-mass-of-105-988-g\/","title":{"rendered":"Washing soda (or sodium carbonate, Na2CO3) has a molar mass of 105.988 g."},"content":{"rendered":"\n<p>Washing soda (or sodium carbonate, Na2CO3) has a molar mass of 105.988 g. How many moles of sodium are there in 46 grams of washing soda?<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>To determine how many moles of sodium are present in 46 grams of washing soda (sodium carbonate, Na2CO3), we need to follow these steps:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Find the molar mass of Na2CO3<\/h3>\n\n\n\n<p>The chemical formula for washing soda is Na2CO3, which means it contains:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>2 sodium (Na) atoms<\/strong><\/li>\n\n\n\n<li><strong>1 carbon (C) atom<\/strong><\/li>\n\n\n\n<li><strong>3 oxygen (O) atoms<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The atomic masses (approximate) are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sodium (Na): 22.99 g\/mol<\/li>\n\n\n\n<li>Carbon (C): 12.01 g\/mol<\/li>\n\n\n\n<li>Oxygen (O): 16.00 g\/mol<\/li>\n<\/ul>\n\n\n\n<p>Now, let&#8217;s calculate the molar mass of Na2CO3:Molar&nbsp;mass&nbsp;of&nbsp;Na2CO3=(2\u00d722.99)+(1\u00d712.01)+(3\u00d716.00)\\text{Molar mass of Na2CO3} = (2 \\times 22.99) + (1 \\times 12.01) + (3 \\times 16.00) Molar&nbsp;mass&nbsp;of&nbsp;Na2CO3=(2\u00d722.99)+(1\u00d712.01)+(3\u00d716.00)=45.98+12.01+48.00=105.99\u2009g\/mol= 45.98 + 12.01 + 48.00 = 105.99 \\, \\text{g\/mol}=45.98+12.01+48.00=105.99g\/mol<\/p>\n\n\n\n<p>This confirms the molar mass is approximately <strong>105.99 g\/mol<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Determine the number of moles of Na2CO3 in 46 grams<\/h3>\n\n\n\n<p>To find the number of moles of Na2CO3 in 46 grams, we use the formula:moles&nbsp;of&nbsp;Na2CO3=massmolar&nbsp;mass\\text{moles of Na2CO3} = \\frac{\\text{mass}}{\\text{molar mass}} moles&nbsp;of&nbsp;Na2CO3=molar&nbsp;massmass\u200bmoles&nbsp;of&nbsp;Na2CO3=46\u2009g105.99\u2009g\/mol\u22480.4346\u2009mol\\text{moles of Na2CO3} = \\frac{46 \\, \\text{g}}{105.99 \\, \\text{g\/mol}} \\approx 0.4346 \\, \\text{mol}moles&nbsp;of&nbsp;Na2CO3=105.99g\/mol46g\u200b\u22480.4346mol<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Determine the number of moles of sodium (Na)<\/h3>\n\n\n\n<p>Since each formula unit of Na2CO3 contains <strong>2 sodium (Na) atoms<\/strong>, the number of moles of sodium is:moles&nbsp;of&nbsp;Na=2\u00d7moles&nbsp;of&nbsp;Na2CO3\\text{moles of Na} = 2 \\times \\text{moles of Na2CO3}moles&nbsp;of&nbsp;Na=2\u00d7moles&nbsp;of&nbsp;Na2CO3moles&nbsp;of&nbsp;Na=2\u00d70.4346\u2009mol=0.8692\u2009mol\\text{moles of Na} = 2 \\times 0.4346 \\, \\text{mol} = 0.8692 \\, \\text{mol}moles&nbsp;of&nbsp;Na=2\u00d70.4346mol=0.8692mol<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>In 46 grams of washing soda, there are approximately <strong>0.869 moles of sodium<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-466.jpeg\" alt=\"\" class=\"wp-image-43307\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-466.jpeg 1024w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-466-300x300.jpeg 300w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-466-150x150.jpeg 150w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-466-768x768.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Washing soda (or sodium carbonate, Na2CO3) has a molar mass of 105.988 g. How many moles of sodium are there in 46 grams of washing soda? The Correct Answer and Explanation is: To determine how many moles of sodium are present in 46 grams of washing soda (sodium carbonate, Na2CO3), we need to follow these [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-43306","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/43306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=43306"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/43306\/revisions"}],"predecessor-version":[{"id":43308,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/43306\/revisions\/43308"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=43306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=43306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=43306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}