Comments on: The Mole and Avogadro’s Number http://www.ridofwarts.com/the-mole-and-avogadros-number/ Wed, 11 Aug 2010 16:39:29 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: blackrooftops http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2814 blackrooftops Thu, 15 Jul 2010 22:58:13 +0000 #comment-2814 this is the only video that made me understand. thank you so much this is the only video that made me understand. thank you so much

]]> By: brianmenendez http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2815 brianmenendez Mon, 21 Jun 2010 12:39:58 +0000 #comment-2815 @nbableful the third part sounds the most accurate @nbableful the third part sounds the most accurate

]]> By: nbableful http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2816 nbableful Sat, 19 Jun 2010 00:20:37 +0000 #comment-2816 @brianmenendez The third part; Another approach to determining Avogadro�s number starts with careful measurements of the density of an ultrapure sample of a material on the macroscopic scale. The density of this material on the atomic scale is then measured by using x-ray diffraction techniques to determine the number of atoms per unit cell in the crystal and the distance between the equivalent points that define the unit cell (see Physical Review Letters, 1974, 33, 464). @brianmenendez

The third part;
Another approach to determining Avogadro�s number starts with careful measurements of the density of an ultrapure sample of a material on the macroscopic scale. The density of this material on the atomic scale is then measured by using x-ray diffraction techniques to determine the number of atoms per unit cell in the crystal and the distance between the equivalent points that define the unit cell (see Physical Review Letters, 1974, 33, 464).

]]> By: nbableful http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2817 nbableful Sat, 19 Jun 2010 00:20:14 +0000 #comment-2817 @brianmenendez The second part; The best estimate of the value of a Faraday, according to the National Institute of Standards and Technology (NIST), is 96,485.3383 coulombs per mole of electrons. The best estimate of the charge on an electron based on modern experiments is 1.60217653 x 10-19 coulombs per electron. If you divide the charge on a mole of electrons by the charge on a single electron @brianmenendez

The second part;

The best estimate of the value of a Faraday, according to the National Institute of Standards and Technology (NIST), is 96,485.3383 coulombs per mole of electrons. The best estimate of the charge on an electron based on modern experiments is 1.60217653 x 10-19 coulombs per electron. If you divide the charge on a mole of electrons by the charge on a single electron

]]> By: nbableful http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2818 nbableful Sat, 19 Jun 2010 00:19:54 +0000 #comment-2818 @brianmenendez The first part: Accurate determinations of Avogadros number require the measurement of a single quantity on both the atomic and macroscopic scales using the same unit of measurement. This became possible for the first time when American physicist Robert Millikan measured the charge on an electron. The charge on a mole of electrons had been known for some time and is the constant called the Faraday. @brianmenendez
The first part:
Accurate determinations of Avogadros number require the measurement of a single quantity on both the atomic and macroscopic scales using the same unit of measurement. This became possible for the first time when American physicist Robert Millikan measured the charge on an electron. The charge on a mole of electrons had been known for some time and is the constant called the Faraday.

]]> By: nbableful http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2819 nbableful Fri, 18 Jun 2010 23:43:01 +0000 #comment-2819 nice job!!!!!! nice job!!!!!!

]]> By: jonwatt107 http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2820 jonwatt107 Thu, 17 Jun 2010 02:24:47 +0000 #comment-2820 thank you for speaking clearly and helping me understand this so much better. keep up the good work! thank you for speaking clearly and helping me understand this so much better. keep up the good work!

]]> By: brianmenendez http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2821 brianmenendez Wed, 16 Jun 2010 14:30:53 +0000 #comment-2821 so how do you know that is true? how do you know there are 6.02 x 10^23 atoms in one gram of carbon? It's not like you can count each individual atom, so how do you know avagadros # is true? so how do you know that is true?

how do you know there are 6.02 x 10^23 atoms in one gram of carbon? It’s not like you can count each individual atom, so how do you know avagadros # is true?

]]> By: lequief http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2822 lequief Wed, 16 Jun 2010 02:56:28 +0000 #comment-2822 hey idk who u are but u helped me alot with understanding this new languauge. thanks for dedicating the time to help those in need. thank u hey idk who u are but u helped me alot with understanding this new languauge. thanks for dedicating the time to help those in need. thank u

]]> By: MrKiter888 http://www.ridofwarts.com/the-mole-and-avogadros-number/comment-page-1/#comment-2823 MrKiter888 Tue, 15 Jun 2010 17:45:25 +0000 #comment-2823 I really value your videos, you're the best chemistry teacher I've ever had. I'm an IB student and could really need some help with understanding the steps taken to solve chemical equations, mass and gaseous relationships, and molar volume of a gas and those types of calculations. You're the best! I really value your videos, you’re the best chemistry teacher I’ve ever had. I’m an IB student and could really need some help with understanding the steps taken to solve chemical equations, mass and gaseous relationships, and molar volume of a gas and those types of calculations. You’re the best!

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