# c101_f10_1006 - Molar mass(Chapter 2.7 and 2.8 1 dozen = 12...

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Molar mass (Chapter 2.7 and 2.8) 1 dozen = 12 “things” or items (1 dozen eggs = 12 eggs) 1 mole = 6.02214199 x 10 23 “things” or items (1 mole eggs = 6.02214199 x 10 23 eggs) Avogadro’s number, N A = 6.022 x10 23 items/mol The mole unit connects the nanoscale (atoms, molecules, etc.) to the macroscale (human scale). 1 mole of copper atoms = 1 mol Cu = 6.022 x 10 23 atoms Cu 24 pennies Molar mass : the mass in grams of one mole of any substance (elements or compounds). Also known as atomic mass, atomic weight, molecular weight (MW), and formula weight (FW), but these terms can be misleading. What is the molar mass (MM) of an element?

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Chemistry 101 Fall 2010 For carbon-12 ( 12 C), the molar mass is 1 mole 12 C = 6.022 x 10 23 atoms 12 C = 12 g 12 C. 12 C is defined to be exactly 12 g. MM of 12 C = exactly 12 g/mol. What is the MM of carbon from the periodic table? Isotope Atomic mass (g) Molar mass (g/mol) Abundance 12 C 1.992646 x 10 -23 12 (exactly) 98.93% 13 C 2.15928 x 10
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c101_f10_1006 - Molar mass(Chapter 2.7 and 2.8 1 dozen = 12...

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