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Avogadros Number

Posted: Tue Jul 04, 2017 3:17 pm
by Sarahi Cota-Felix 1C
As I was working on some of the practice problems in the textbook, Avogadro number came out and I am not sure if we will need it for this upcoming test, if so can someone please explain its concept because it confused me.

Re: Avogadros Number

Posted: Tue Jul 04, 2017 6:06 pm
by Chem_Mod
Avogadro's number is 6.022 x 10^23. It represents the number of molecules in one mole of that substance. You usually use this value for the problems in the fundamental chapters of the book. Whenever you need to convert from grams to moles to molecules to atoms, this value is needed as a conversion factor.

Re: Avogadros Number

Posted: Mon Oct 02, 2017 3:09 pm
by Nhan Nguyen 2F
The Avogadro's number is 6.022 x 10^23 and this number is what defines 1 mole. A "Mole" is similar to the use of "dozen" (12) or "gross" (144). All of these numbers are used to group a certain amount of stuff (such as electrons, atoms, molecules,etc).

** I'd like to note that the Avogadro's number is slightly different than Avogradro's constant in terms of units. Avogadro's number has no units, whereas Avogadro's constant is 6.022 x 10^23 mol^-1!

Re: Avogadros Number

Posted: Mon Oct 02, 2017 11:36 pm
by Emma Miltenberger 2I
Dr. Lavelle mentioned in class today that we will be given a periodic table, list of equations, and list of constants for every test. Avogadro's number should be listed on this list of constants so you do not need to worry about memorizing it. However, you should be familiar with how to use it since it is so common in chemistry. Avogadro's number, 6.022*10^23, indicates the number of atoms or molecules in one mole of substance. Therefore, using dimensional analysis, you can convert between number of atoms, moles, and molar mass of a substance.

Re: Avogadros Number

Posted: Tue Oct 03, 2017 12:23 am
by Daniel Vo 1B
Part of the reason why Avogadro's number comes up a lot is that it's the number of atomic mass units that would weight 1 gram; if you had 1 mole of just neutrons you would have the equivalent of 1 gram. In a way, you can think of it as another conversion factor, like 12 inches in a foot, 6.022*10^23 atomic mass units in 1 gram.

Re: Avogadros Number

Posted: Thu Oct 05, 2017 7:14 pm
by Manasvi Paudel 1A
Avogadro's number will be one of the constants that is supplied on a sheet that we can use on the test but I would suggest memorizing it as well! It will be used throughout the year for different purposes, however for the test tomorrow, it will be used in conversion equations. It represents the number of units in one mole of any substance; so if you need to convert anything to molecules, 6.022 x 10^23 is essential to know.

Re: Avogadros Number

Posted: Thu Oct 05, 2017 7:30 pm
by Rachel Lu_dis1H
Avogadro's number is 6.022x10^23. A mole is a unit used to describe an amount of chemical substances (like a mole of Carbon or a mole of H20). 1 mole = 6.022x10^23. Moles is comparable to using the world "dozen" which means 12. If I say I have two dozen eggs I would have 24 eggs. If I say I have a mole of pencils, then I would have 6.022x10^23 pencils. It's just a quicker and easier way to measure large quantities of things since molecules, atoms, etc. are so small.