How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask R.R. Jha Your Own Question

R.R. Jha
R.R. Jha, Tutor
Category: Homework
Satisfied Customers: 5420
Experience:  B.Tech
Type Your Homework Question Here...
R.R. Jha is online now
A new question is answered every 9 seconds

how do I calculate nmoles from mmol/L? Molecular weight is

Resolved Question:

how do I calculate nmoles from mmol/L?
Molecular weight is 68.99527
Stock solution is 0.020 mmol/L
Volume is 1mL

What is the nmole value? and how do I work it out?
Submitted: 2 years ago.
Category: Homework
Expert:  R.R. Jha replied 2 years ago.
Hi,

Number of moles
= Molarity x Volume
= (0.020 mmol/L) x (0.001 L)
= 0.00002 mmol
= 0.02 nmol


Let me know if any question.

Please click Accept
Regards
Customer: replied 2 years ago.

is that the correct calculation to answer the following?

"determine the activity of NO3 reductase in leaf tissue as nmoles NO2 produced per minute per gram of tissue"?

As I was under the impression this question was asking about mass rather than concentration?

Expert:  R.R. Jha replied 2 years ago.
I guess you wish to convert nmoles to mass.

mass
= number of moles x Molecular weight
= (0.02*10^-9 mol) x 68.99527 g
= 1.38 nanogram
Customer: replied 2 years ago.

Last question and I will accept answer.

 

Is nanogram the same as nmol?

 

I am very confused as to what the question is asking?

I created a standard curve in mmol/L but I need to plot absorbance against nmoles not mmol/L is this a mass or a concentration?

 

Thanks for your time

Expert:  R.R. Jha replied 2 years ago.
nmol is a numeric unit to count number of entities, just like hundreds, thousands, or millions.
1 nmol = 6.022 x 10^14

Nanogram is unit of weight.
1 nanogram = 10^-9 grams

mmol/L is a concentration, as it defines number of entities per litre of solution.
nmoles is just number of entities (atoms, ions or molecules).


Regards
Customer: replied 2 years ago.

So how do I calculate nmol from mmol/L?

 

Is it the first reply you sent, or the second?

Expert:  R.R. Jha replied 2 years ago.
It was the first answer I posted above.
It's easy to see that if volume is 1 mL, number of mmol/L is same as number of nmol.
Customer: replied 2 years ago.

Thanks,

 

I've really tied myself in knots with this one and I know it should be so easy just cannot get my head round it.

 

 

Expert:  R.R. Jha replied 2 years ago.
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
If you've already paid for this answer, simply Login.
R.R. Jha, Tutor
Category: Homework
Satisfied Customers: 5420
Experience: B.Tech
R.R. Jha and 4 other Homework Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
< Last | Next >
  • http://ww2.justanswer.com/uploads/BU/BusinessTutor/2012-2-2_115741_Kouki2.64x64.jpg Manal Elkhoshkhany's Avatar

    Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
  • http://ww2.justanswer.com/uploads/LI/lindaus/2012-6-10_04811_IMG20120609164157.64x64.jpg Linda_us's Avatar

    Linda_us

    Finance, Accounts & Homework Tutor

    Satisfied Customers:

    3121
    Post Graduate Diploma in Management (MBA)
  • http://ww2.justanswer.com/uploads/ComputersGuru/2010-02-13_051118_Photo41.JPG LogicPro's Avatar

    LogicPro

    Engineer

    Satisfied Customers:

    3035
    Expert in Java C++ C C# VB Javascript Design SQL HTML
  • http://ww2.justanswer.com/uploads/lanis/2009-4-1_233717_phput9xef_c1pm.jpg Lani S.'s Avatar

    Lani S.

    Tutor

    Satisfied Customers:

    2457
    Registered Nurse, Internet Researcher, Private Tutor
  • http://ww2.justanswer.com/uploads/chooser77/2009-08-18_162025_Chris.jpg Chris M.'s Avatar

    Chris M.

    M.S.W. Social Work

    Satisfied Customers:

    2341
    Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
  • http://ww2.justanswer.com/uploads/JawaadAhmed/2009-6-27_12137_SIs_SHadi.jpg F. Naz's Avatar

    F. Naz

    Chartered Accountant

    Satisfied Customers:

    1975
    Experience with chartered accountancy
  • http://ww2.justanswer.com/uploads/JK/jkcpa/2011-1-16_182614_jkcpa.64x64.jpg Bizhelp's Avatar

    Bizhelp

    CPA

    Satisfied Customers:

    1873
    Bachelors Degree and CPA with Accounting work experience
 
 
 

Related Homework Questions