{"id":32519,"date":"2025-06-22T15:05:15","date_gmt":"2025-06-22T15:05:15","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=32519"},"modified":"2025-06-22T15:05:16","modified_gmt":"2025-06-22T15:05:16","slug":"determine-the-percent-composition-of-each-element-in-nh4br-2","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/determine-the-percent-composition-of-each-element-in-nh4br-2\/","title":{"rendered":"Determine the percent composition of each element in NH4Br"},"content":{"rendered":"\n
Determine the percent composition of each element in NH4Br. It should be rounded to the nearest percent. 2.) 3.25 x 10^25 atoms of neon gas (Ne) equals how many moles of neon gas (Ne)? 3.) How many moles of Al can be produced from 10.87g of Ag? Al(NO3)3(s) + 3Ag —> Al + 3AgNO3 4.) How many grams of N2 are needed to produce 2.17 mol of NH3 when reacted according to this chemical equation? N2(g) + 3H2(g) —> 2NH3(g)<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n
1. Percent Composition of NH\u2084Br<\/strong><\/h3>\n\n\n\n
Molar masses:<\/strong><\/p>\n\n\n\n
\n
N = 14 g\/mol<\/li>\n\n\n\n
H = 1 g\/mol \u00d7 4 = 4 g\/mol<\/li>\n\n\n\n
Br = 79.9 g\/mol<\/li>\n<\/ul>\n\n\n\n
Molar mass of NH\u2084Br = 14 + 4 + 79.9 = 97.9 g\/mol<\/strong><\/p>\n\n\n\n
Molar mass of N\u2082 = 28.02 g\/mol<\/strong><\/p>\n\n\n\n
Mass = 1.085 mol \u00d7 28.02 g\/mol \u2248 30.4 g<\/strong><\/p>\n\n\n\n
Answer:<\/strong> 30 grams of N\u2082<\/p>\n\n\n\n\n\n\n\n
Explanation (Summary of Concepts Used)<\/strong><\/h3>\n\n\n\n
These problems use key chemistry concepts: percent composition, mole conversions, and stoichiometry. Percent composition requires dividing each element\u2019s mass by the total molar mass and multiplying by 100. Converting atoms to moles uses Avogadro\u2019s number. Stoichiometry problems follow balanced chemical equations and molar ratios. For mass-to-mole or mole-to-mass conversions, the molar mass from the periodic table bridges between grams and moles. Each solution here ensures correct scientific methodology and proper rounding to the nearest whole number where needed.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"
Determine the percent composition of each element in NH4Br. It should be rounded to the nearest percent. 2.) 3.25 x 10^25 atoms of neon gas (Ne) equals how many moles of neon gas (Ne)? 3.) How many moles of Al can be produced from 10.87g of Ag? Al(NO3)3(s) + 3Ag —> Al + 3AgNO3 4.) […]<\/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-32519","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32519","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=32519"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32519\/revisions"}],"predecessor-version":[{"id":32521,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32519\/revisions\/32521"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=32519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=32519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=32519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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