Avogadros Number

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Sarahi Cota-Felix 1C
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Avogadros Number

Postby Sarahi Cota-Felix 1C » Tue Jul 04, 2017 3:17 pm

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.

Chem_Mod
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Re: Avogadros Number

Postby Chem_Mod » Tue Jul 04, 2017 6:06 pm

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.

Nhan Nguyen 2F
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Re: Avogadros Number

Postby Nhan Nguyen 2F » Mon Oct 02, 2017 3:09 pm

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!

Emma Miltenberger 2I
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Re: Avogadros Number

Postby Emma Miltenberger 2I » Mon Oct 02, 2017 11:36 pm

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.

Daniel Vo 1B
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Re: Avogadros Number

Postby Daniel Vo 1B » Tue Oct 03, 2017 12:23 am

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.

Manasvi Paudel 1A
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Re: Avogadros Number

Postby Manasvi Paudel 1A » Thu Oct 05, 2017 7:14 pm

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.

Rachel Lu_dis1H
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Re: Avogadros Number

Postby Rachel Lu_dis1H » Thu Oct 05, 2017 7:30 pm

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.


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