{"id":2826,"date":"2012-11-23T18:33:30","date_gmt":"2012-11-23T18:33:30","guid":{"rendered":"http:\/\/testpreparations.com\/help\/?p=2826"},"modified":"2014-12-02T08:31:56","modified_gmt":"2014-12-02T08:31:56","slug":"chemistry-review-molar-mass","status":"publish","type":"post","link":"https:\/\/schooltutoring.com\/scholarship\/2012\/11\/23\/chemistry-review-molar-mass\/","title":{"rendered":"Chemistry Review: Molar Mass"},"content":{"rendered":"

Molar mass is used to convert moles to grams. If we look at 1 atom of carbon-1, it has a mass of 12 amu. 12 grams is equal to 1 mole of carbon-12, which has 6.02×1023<\/sup> atoms. Thus, 1 mole of any element has a mass in grams that is numerically equivalent to its atomic mass.<\/p>\n

For example, the atomic mass of hydrogen is 1.01 amu. This means that 1 mole of hydrogen is 1.01 g. Thus, the molar mass of hydrogen is 1.01 g\/mole.<\/p>\n

To get the molar mass for a compound, you add up all the molar masses of the atoms in the compound. For example, a water molecule is made up of 2 hydrogen atoms and 1 oxygen atom. To get the molar mass of water, you would add up the molar masses of 2 hydrogens (2 x 1.01 g) and 1 oxygen (1 x 16 g). The molar mass of water would then be 18.016 g\/mole.<\/p>\n

 <\/p>\n

Example: <\/strong>If you had 7 g of nitrogen, how many moles of nitrogen do you have?<\/p>\n

1) Figure out what the molar mass of nitrogen is.<\/p>\n

Since the atomic mass of nitrogen is 14.01 amu, the molar mass of nitrogen is 14.01 g\/mole.<\/p>\n

2) Divide the amount of nitrogen you have by the molar mass.<\/p>\n

(7 g) \/ (14.01 g\/mole) = 0.4996 mole<\/p>\n

Therefore, you have 0.4996 mole of nitrogen.<\/p>\n

 <\/p>\n

Example: <\/strong>If you had 3.4 moles of calcium, how many grams of calcium do you have?<\/p>\n

1) Figure out what the molar mass of calcium is.<\/p>\n

Since the atomic mass of calcium is 40.078 amu, the molar mass of calcium is 40.078 g\/mole.<\/p>\n

2) Multiply the number of moles of calcium you have by the molar mass.<\/p>\n

(3.4 moles) x (40.078 g\/mole) = 136.2652 g<\/p>\n

Therefore, you have 136.2652 g of calcium.<\/p>\n

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This article was written for you by Samantha<\/strong>, one of the tutors with SchoolTutoring Academy<\/span>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Molar mass is used to convert moles to grams. If we look at 1 atom of carbon-1, it has a mass of 12 amu. 12 grams is equal to 1 mole of carbon-12, which has 6.02×1023 atoms. Thus, 1 mole of any element has a mass in grams that is numerically equivalent to its atomic […]<\/p>\n","protected":false},"author":6,"featured_media":1954,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2841,16],"tags":[3120,3121,3122,3422],"class_list":["post-2826","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-act","category-science","tag-how-do-you-calculate-number-of-moles","tag-how-do-you-convert-between-grams-and-moles","tag-how-do-you-convert-between-moles-and-grams","tag-what-is-molar-mass"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts\/2826","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/comments?post=2826"}],"version-history":[{"count":0,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts\/2826\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/media\/1954"}],"wp:attachment":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/media?parent=2826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/categories?post=2826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/tags?post=2826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}