mole vs. M

Science questions not covered in Chem 14A and 14B. Try to limit questions to chemistry (inorganic chemistry, physical chemistry, organic chemistry, biophysical chemistry, biochemistry, materials science, environmental chemistry).

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Stephanie Zhang 2K
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mole vs. M

Postby Stephanie Zhang 2K » Wed Jan 06, 2021 2:16 pm

Hello, I'm not sure whether this is the right place to post it but I just had a general clarifying question. At first, I thought that moles and M were the same thing, so I'm a little confused. Does M represent mol•L^-1?

Lea Baskin Monk 1F
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Re: mole vs. M

Postby Lea Baskin Monk 1F » Wed Jan 06, 2021 2:20 pm

Yes, M indicates molarity (mol•L^-1) and mol indicates moles.

Chem_Mod
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Re: mole vs. M

Postby Chem_Mod » Wed Jan 06, 2021 2:21 pm

Moles are typically written out as moles or mol.

M is used to designate molarity, which is defined as .

Samiha Molla 3G
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Re: mole vs. M

Postby Samiha Molla 3G » Wed Jan 06, 2021 3:06 pm

M represents molarity, so the units are mol/L like you said. Moles are often written as mol, so the molarity is the amount of moles per liter of solution.

AmyHo2K
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Re: mole vs. M

Postby AmyHo2K » Wed Jan 06, 2021 10:11 pm

M is molarity or moles per liter.

Tiao Tan 3C
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Re: mole vs. M

Postby Tiao Tan 3C » Thu Jan 07, 2021 4:04 am

You're right M means is molarity and represents moles per Liter.

Faith St Amant 3D
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Re: mole vs. M

Postby Faith St Amant 3D » Thu Jan 07, 2021 10:18 am

yes, so when you see that a solution is 4M, that means that it has 4 moles of solute per liter of solvent and you would call the solution a 4 molar solution.

Kiran Marla
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Re: mole vs. M

Postby Kiran Marla » Thu Jan 07, 2021 11:55 am

Hey, I am trying to create a new post because I had a question about the Sapling HW. However, I do not see an option to create a new post for me. I can only reply to other posts. Could someone please tell me how to create a new topic? It would be nice if someone could upload a screenshot of their page and showed which button to press! Thank you!!

Megan ODonnell 3F
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Re: mole vs. M

Postby Megan ODonnell 3F » Thu Jan 07, 2021 12:16 pm

Yes, M refers to molarity which is mole/volume

SahajDole_1C
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Re: mole vs. M

Postby SahajDole_1C » Thu Jan 07, 2021 12:32 pm

Yes M is mol * L^-1

Hailey Kang 2K
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Re: mole vs. M

Postby Hailey Kang 2K » Thu Jan 07, 2021 12:42 pm

Hi!

M refers to molarity which is the same thing as mol/L

Sukhkiran Kaur 3I
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Re: mole vs. M

Postby Sukhkiran Kaur 3I » Thu Jan 07, 2021 4:07 pm

Yes M represents molarity while a mole is just a mole!

Ryan Agcaoili 2E
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Re: mole vs. M

Postby Ryan Agcaoili 2E » Thu Jan 07, 2021 4:28 pm

Mol is different from M because M is used to measure concentration in the units M * L^-1.

Jordan Tatang 3L
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Re: mole vs. M

Postby Jordan Tatang 3L » Thu Jan 07, 2021 4:29 pm

yup M is molarity which is mol/L

Katie Phan 1K
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Re: mole vs. M

Postby Katie Phan 1K » Thu Jan 07, 2021 4:43 pm

M is molarity. Moles will be referred to as mol or moles.

Nayra Gharpetian 3F
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Re: mole vs. M

Postby Nayra Gharpetian 3F » Thu Jan 07, 2021 4:52 pm

M is concentration in mol/L. moles will be expressed as mol or mole

Kaili Valenzuela 2B
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Re: mole vs. M

Postby Kaili Valenzuela 2B » Thu Jan 07, 2021 5:36 pm

Kiran_Marla_3A wrote:Hey, I am trying to create a new post because I had a question about the Sapling HW. However, I do not see an option to create a new post for me. I can only reply to other posts. Could someone please tell me how to create a new topic? It would be nice if someone could upload a screenshot of their page and showed which button to press! Thank you!!

Hello! To create a new post you have to click the board index button at the top of the screen, it’s located right about the blue like button and it has a little house icon. Once you click that you can scroll towards the bottom and there you will see the general topics under 14B and once you click one you can choose a more specific topic that corresponds to what you’re going to post and then once you click that you should see an icon at the top that says new post! Hope this helps!


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