$\lambda=\frac{h}{p}$

905409193
Posts: 89
Joined: Wed Sep 30, 2020 10:06 pm

One of the Sampling Q's explained that we needed to use Avogadro's number but I'm not too familiar with it. What is it and when should we use it?

Lillian Ma 1I
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Avogadro's number is 6.02 x 10^23 mol^-1, and it's used to describe an amount of something like molecules, atoms, or formula units.

Mahika More 1H
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It is used to describe the number of molecules or atoms per mole. If you have some amount of moles you can use Avogadro's number to convert.

jasmineculilap_3F
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Avogadro's number means that 1 mole (mol) is equal to 6.0221 * 10^23 particles. Particles can refer to molecules/atoms/formula units. You usually use it when you need to convert moles to atoms/molecules. For example, the mass on the periodic table is molar mass so you would divide by avogadro's number to get the mass of a single atom.

Grace_Remphrey_2J
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Joined: Wed Sep 30, 2020 9:54 pm

Hello! The answers above are super helpful, but I'm definitely a visual learner so I found a youtube video that explains super clearly! Hope this helps.

Edwin Liang 1I
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Avogadro's number is 6.02214 * 10^23 units. These units tell us the amount of "stuff" in a mole. For example, there are 6.02214 * 10^23 atoms of Nitrogen in a Mole of Nitrogen.

905409193
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Sweet! Thank you!!!

Posts: 88
Joined: Wed Sep 30, 2020 9:38 pm

Avogadro's number is 6.022 x 10^23, and you would use it when looking for formula units, atoms, photons, and any particle (just not moles or grams).

Diana Aguilar 3H
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Avogadro's number is 6.022*10^23 and it is used to describe the amount of something there is in a mole.

Kiana Javier 3G
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Joined: Wed Sep 30, 2020 10:11 pm

On top of what everyone else has said, it was helpful for me to remember to use Avogadro's number when converting kJmol^-1 to J. Your last step in this conversion would be to divide by Avogadro's number to cancel the mol^-1 out and have your answer in just J. This came up for me when solving the Audio-Visual Modules, and I couldn't seem to get the answer right because I was forgetting this last step. Hope this helps!

Ethan Goode 2H
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Avogadro's number basically is just a way of converting something from moles to particles or vice versa. It relates the number of moles to number of atoms or particles.

Katie Nye 2F
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Avogadro's number is 6.02 x 10^23. It identifies how many particles are in a mole and is often used in unit conversions between moles and particles.

jessicaosuna_1F
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Hi! I use it whenever I need to add mol-1 to the ratio for the answer or when I need to cancel out mol to get my units to match.

Posts: 88
Joined: Wed Sep 30, 2020 10:00 pm

Basically use Avogadro's number whenever you are trying to convert to moles or from moles into individual particles of the substance.

Aliya Roserie 3I
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Joined: Fri Aug 09, 2019 12:16 am

We can use Avogadro's number in order to convert to a unit of necessity such as molecules, atoms, etc.

Joshua Swift
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Joined: Wed Sep 30, 2020 9:50 pm

You want to use Avogadro's number hen you are given moles but the question asks for an answer in terms of one atom, molecule, formula unit, etc.

Talia Dini - 3I
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Joined: Wed Sep 30, 2020 9:32 pm

Hi! Avogadro's number is 6.02x10^23 mol^-1. This number is usually used to describe the number of atoms or formula units.

Yolanda_Xing_3A
Posts: 43
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Avogadro's number is 6.02x10^23. It is the conversation number between mol and number of particles. 6.02x10^23 Particles equals one mol.

Hasan Mirza 3F
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Joined: Wed Sep 30, 2020 10:00 pm

Avogadro's' number is the constant number of any type of particle in a mole. For example, when you are given the molar mass of Hydrogen, that is the weight of 6.022x10^23 hydrogen atoms.

David Jen 1J
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Joined: Wed Sep 30, 2020 9:33 pm

Avogadro's number represents the number of atoms in one mole. Thus, we should use it whenever a question asks for something regarding atoms.

Samudrala_Vaishnavi 3A
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Avogadro's number is approximated by 6.022*10^23 and it basically represents the number of atoms in a mole of any element which is different from the individual atomic mass. You can multiply the moles of something by Avogadro's number to get the atom amount of it. You can divide by Avogadro's number to get the mole value of something in atoms, photons, or formula units.

CesarLec1
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