mmol to mol

[Carson Yoshida 3H]

If a problem gives us the amount of substance in mmol do we have to convert that to mol in order to plug it in to the P=nRT/V equation?

[Gianna McNiel 1I]

I would convert it to moles. You could probably leave it as long as you keep mmols consistent throughout the entire calculation, but I think it'd be better to just convert it in the beginning.

[Andrew Nguyen 3L]

I personally think it's better to convert to moles. The constants often match up better and molarity (M) uses moles per liter. So using mmol might mess up an equilbrium calculation with non-one coefficients in the front

[Hope_Hayashida_3E]

It's probably better to convert to moles, especially as a precautionary measure since most equations use the unit of moles. It usually doesn't matter in formulas where the units cancel out (i.e. M1V1=M2V2), but for PV=nRT, the n has to be in moles.

[samaagwani-disc2L]

When a problem gives you concentration in grams or mmols or even gives you volume in ml or any unit other than L, it is always best to convert. Since we want the final answer to be mol.L^-1, try your best to always notice the units and convert concentration to mols and volume to Liters. Remember, 1 mmol = 0.001 mols and 1 mL = 0.001 Liters. When given grams, find the molar mass from the periodic table and divide the given grams value by the molar mass to obtain the value in mols. Hope this helps:)

[Callie Phung 2J]

For any problem actually, I don't think you need to convert to millimoles as long as all your other units are in milliliters, milligrams, etc.

For instance, if you are given 2 mL and 3 mmol:
p(2) = 3RT
2/3 = RT/p

Whereas if you convert both to Liters and moles, respectively:
p(0.002)=0.003RT
0.002/0.003 = RT/p, and 0.002/0.003 is equivalent to 2/3, so
2/3 = RT/p (same equation as above)

I think they're the same as long as the units are consistent with the milli prefix. But to be extra cautious, it never hurts to convert.

[John_Sunthorn_3B]

Yes, you should. "n" is the amount of moles that you are using, and the universal gas constant R is in L.atm/mol.K or J/mol.K. It is important to keep all the units consistent. You may not necessarily have to in some instances, but I personally would just get into the habit of converting everything to moles (and overall just using the units generally used in these equations) to avoid confusion and leaving less room for error.

[joannar]

I believe it would be best to convert to moles only because it does help keep the calculation consistent and also because most equations use mole unit! And to convert, 1mmol is equivalent to 0.001 mol

[janice]

You should convert mmol to mol to match the unit of the constant R.

[jennacostello8]

Whenever a problem gives me mmol, I usually convert to mol just to be safe. It is usually best to convert to mol.

[Mariet Garcia 1E]

Yes, you should convert it either in the beginning or at the end, just make sure you are being consistent and using the same units throughout your work.

[Levon_Avedian_2H]

Is mmol or mol more efficient in calculations and why?

[tristenaguinaldo]

Is mmol or mol more efficient in calculations and why?

mols are easier to use than mmol because that is the unit that the equation uses so it takes out any steps afterwards that you would have to do if you used mmol

[Ashlinn_Limjoco_1I]

Since most equations requires moles, I think a safe bet would be to always convert to moles.

[Jinhee Lee 3B]

Hello! I suggest that you use mol when calculating PV=nRT. n is in the unit moles!

[205750231]

Since the SI units for the amount of a substance is moles, you should convert the amount of mmol of a given substance to mol. This can be done before or after plugging the concentration into the ideal gas law equation, but I would do it before to avoid any mathematical problems or confusion.

[005754640]

Yes, because the n in the formula specifies for mol. Otherwise you would not get the correct answer.

[Kirsten Yu 2K]

I would convert to moles. I've found that doing so significantly helps to reduce my number of silly calculation errors

[Ananya Ravikumar 1I]

Yes, it would be convenient to convert it to mol because all R values we are provided use mol and not another exponent of mol. even if you do not convert mmol to mol, just make sure to convert everything else to mmol so the units check out.

[005999765]

I believe it would be best to convert to moles because it helps keep the calculations consistent. Most equations are also in moles per unit.

[Giacomo Carter 2D]

I think a good rule of thumb is to use the basic SI unit like moles and L instead of mmol or mL then you just make sure you are not creating any unnecessary mistakes.

[Kayleen Priscillia 2C]

The ideal gas equation deals with mols, so you must convert it from mmols to mols.

[306022612]

In most problems you want everything to be in SI units. Unless the problem is specifically asking for it in mmol, I would convert to moles as this is the norm for conditions.

[Kaitlin Lemke 2K]

Yes, I would recommend converting mmol to mol when using the P=nRT/V equation.

Whatever system of units you use, it is best to be consistent. Since the constant "R" uses the unit of mols, it is best to convert mmol to mol. You'll have to do the extra calculation to convert to the correct units at some point anyways -- might as well do it in the beginning so you have less work as well as less of a chance of forgetting to do it later on.

Good luck! :)

[Avani Pammidimukkala 2F]

If a problem gives the amount of a substance in mmols, it would be better to convert the amount into moles before plugging it into the PV = nRT equation. However, if the other values are also in their "millimeter" form, it is not necessary to convert the values.

[Emily Ng 3D]

I think it would be best to convert to mol since the n in the equation is in moles.

[Jenifer_Fonseca]

What I usually do is first convert it from the beginning, especially when we are including the R constant it just keeps the calculations more organized and can help avoid mistakes.

[Jude Marting 2l]

Hi, seeing as the PV=nRT equation requires moles I would definitely convert mmols to mols.

[Anahi C 2F]

I would convert it to mole due to the value of R. However, if it gives you a R value where it uses mmol instead of mole, then it would be okay to leave the value of 'n' as mmol.

[205898077]

Since "n" is representative of moles I would convert to moles and use that so the units are consistent.

[Sofi Ghasemzadeh 2G]

While you can use mmol as long as you are consistent throughout the calculations, it might get confusing. Therefore, it is best, in my opinion at least, to convert to moles straight away and use that unit consistently. Additionally, n is the SI unit, and it represents moles, not mmol.