April 21, 2014

Search: Lab Math-Dilutions

Number of results: 217,374

One other thing: when you do this, make sure to shake it vigorously for at least 45 seconds if doing it by hand, but I would prefer that you use a vortexer for at least 45 seconds to make sure that it is mixed properly. I know when I needed to make dilutions or needed a dilute...
Friday, August 2, 2013 at 12:54pm by Devron

You are given 10 L of a DNA stock solution that has 1.0 g target DNA/L. The target DNA molecule is 2.9 kb in length. Describe a set of serial dilutions that would yield a standard curve with the following concentrations: 2 x10^7 copies/L, 2x10^6 copies/L, 2x 10^5 copies/...
Monday, April 7, 2014 at 4:34pm by Meena

Lab Math-Dilutions
You have 1.50mL of a urine specimen. The assay you are about to perform requires a 1/25 dilution of this specimen. How much water must be added to the specimen to achieve this dilution? I know this is simple but I am not coming up with the right answer. Thank you to whoever ...
Monday, January 16, 2012 at 11:45pm by Morgan

During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl. For lab, it is necessary make the following dilutions (Fill in the blanks): 5μL of Stock Ab + 195μL of buffer to make a 1:____ dilution at _______μg...
Tuesday, September 13, 2011 at 1:40pm by gabrielle

I suppose the long way, and I don't know of a short way, is to prepare dilutions of H2SO4 and test each of the dilutions with some metal, say Zn metal. You will need to set some benchmarks before you start of what you mean by "stop showing signs of acidic reaction."
Saturday, July 2, 2011 at 6:50pm by DrBob222

Lab Math-Dilutions
Look at iat this way. 1 mL sample + 24 mL H2O 2 mL sample + 48 mL H2O So 1.5 + (24+12) mL H2O
Monday, January 16, 2012 at 11:45pm by DrBob222

I have a 2000ppm benzoic acid solution.I want to prepare a 20ppm benzoic acid solution.Is it better to 1) do serial dilutions i.e. from 2000 to 200 to 20ppm or 2) prepare 20ppm standard fresh when required( take 10ul of 2000ppm stock and top up to 1ml in a LC vial with 990ul ...
Saturday, September 11, 2010 at 8:22pm by chloe

Chem Lab Help
I wanted to know if any one has done the Determination of ASA Content of Tablets Lab Report. I need help doing the post lab questions
Tuesday, December 4, 2012 at 2:21am by Latica

How can lab practices and safety precautions help reduce hazards in a lab setting? How do you handle blood cultures and pathogenic strains in a lab to minimize contamination?
Friday, May 3, 2013 at 12:06pm by Sara

I really need help with my science lab. I was sick when we did the lab on Thursday and Friday was a snowday so I did not get to get the observations off my peers. My teacher has allowed people one more day and I do not understand this Lab at all. If someone could help me write...
Monday, March 5, 2007 at 6:47pm by Scott

Lab in general
I just read my syllabus for lab and I am kind of shocked at what it says. I do know that I have to write out procedures of the lab in my nbk before coming to lab but I just read that it says "You will NOT be allowed to refer to you textbook/handout during the lab period" Is ...
Monday, September 3, 2007 at 1:31pm by ~christina~

How much water did you add? How many dilutions did you make?
Thursday, June 27, 2013 at 12:18am by DrBob222

Chemistry Titration Lab HELP!
Go to google and type in titrations lab. The 6th result "Performing Titration Lab" has lots of information and even a virtual titration tool that you can use to get the hang of it!
Wednesday, June 11, 2008 at 2:11pm by BADAMS

You need a standard to see how good the chemistry and/or your lab techniques are. If you don't come up with the right answer then either the procedure is not very good or your lab technique is lousy.
Saturday, October 1, 2011 at 1:29pm by DrBob222

I am doing an ap biology lab on plant photosynthesis. It's specifically lab # 4 on plant pigments and photosynthesis and it's on question # 8 on Exercise 4B: Photosynthesis/ The Light Reaction. Identify the function of each of the cuvettes. I already have gone to the lab bench...
Sunday, November 2, 2008 at 7:12pm by Roger

1)Write the general equation used to determine the volume of stock required to make a given concentration of standard? Define any terms you used. ----use the 100ml flasks to create four serial dilutions of the stock 10,000uM nitrate solution that has been provided. Prepare ...
Friday, April 23, 2010 at 3:12pm by josh

It's for dilutions AND this type problem when the reaction between the acid and base is 1:1 as it is in this case.
Sunday, September 6, 2009 at 5:01pm by DrBob222

I'm not really sure what that is, but basically in our lab we just had like yeast, water, and baking soda. Then some of the test tubes we covered with a thin plastic film. It was stretchy and i'm trying to write my lab report so i'm trying to get the right word...
Sunday, March 9, 2008 at 10:03pm by Quick question

Chem Lab Math!
What's the molarity of the solution? 1,000 mL x 1.037 g/mL x 0.37 = ?g HCHO. ?g HCHO/molar mass = moles and that is the molarity since the solution is 1 L.Abut 13M but you need to do that more accurately than I. final M = about 13M x (1.00/500) x (1.00/5.00) = ? (Note: ...
Sunday, March 18, 2012 at 9:41pm by DrBob222

Biology Lab gr 12
hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab with sand, and it is with a ...
Tuesday, February 26, 2008 at 6:30pm by INSANELY URGENT

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving with this particle.
Thursday, March 10, 2011 at 4:54pm by libby

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving with this particle.
Thursday, March 10, 2011 at 4:54pm by libby

depict the following dilutions series: 1:4 1:16 1:64 IN A FINAL VOLUME OF 200ML
Wednesday, October 5, 2011 at 12:19pm by shaknocka

How do I find the molarity of NaCl for different dilutions? You calculate the number of moles per liter of solution.
Sunday, April 8, 2007 at 9:37pm by Colleen

Why wouldn't you do this reaction directly in a lab (and would rather use Hess' Law to determine the enthalpy of formation)?: 1/2N2(g) + 2H2(g)+ 1/2Cl2(g) -> NH4Cl(s) I don't think the reactants are that dangerous...? It's still pretty safe to do in a lab, isn't it? Are ...
Monday, February 18, 2013 at 7:48pm by a Canadian

chemistry dilutions
you have 47 mL of a 2 M stock solution that must be diluted to .5 M how much water should you add
Thursday, May 5, 2011 at 9:32pm by Kristin

The equations and numbers may be exact; however, the answers obtained may not be the exact answer to the problem. So there will be an absolute and a relative error associated with the lab answer. I don't know what kind of virtual lab you performed; however, one such example ...
Tuesday, June 21, 2011 at 2:21pm by DrBob222

Doing it in the lab IS one way of solving some of these problems and lab work is quite important; however, one must ALSO know how to calculate the answers. A good chemist must know how to do both; that is, must be good in the lab as well as in theory. In this case, the problem...
Monday, October 29, 2007 at 4:00am by DrBob222

Organic Chemistry
You haven't supplied any details of what you did in the lab. We don't know where you are, much less what you did in the lab.
Monday, March 15, 2010 at 11:56pm by DrBob222

Has anyone written up a Lab for the Sponge Capsule lab? I am trying to do a graph
Sunday, September 9, 2012 at 7:39pm by Gen

what can be the source of error in lab of forces equilibrium,force board lab?
Thursday, September 26, 2013 at 4:15pm by Riana

what can be the source of error in lab of forces equilibrium,force board lab?
Thursday, September 26, 2013 at 6:01pm by Riana

hi, has anyone done the lab on 1.2 lab : constant velocity? it's about ticker tape. thanks
Wednesday, March 11, 2009 at 6:26pm by ashley

Biology Lab
What tense do you use when writing a discussion in a formal lab?
Friday, October 30, 2009 at 6:53pm by Moi

Sources of error for lab
It is hard for us to know how the lab was accomplished. Was the ramp straight, or bowed?
Saturday, September 15, 2007 at 7:39pm by bobpursley

can someone just come to my house and do my lab for me????
Sunday, December 14, 2008 at 8:56pm by none

bio lab
This is a lab question that should have experimental data to go along with it.
Thursday, March 13, 2008 at 12:01am by Ast

chem lab (webwork)
D is correct - based on the first paragraph of the lab instructions for week 2.
Saturday, April 3, 2010 at 12:02am by UCI student 2

When doing a virtual lab everything is exact, but why would they still ask for absolute and relative errors?
Tuesday, June 21, 2011 at 2:21pm by Diana

Oh...okay but the lab question was actually a fill in sheet for the actual lab when I do it. Thanks Dr.Bob =)
Monday, September 3, 2007 at 12:11am by ~christina~

I did a lab on pressure and depth today. This lab was to simply submerge a plastic tube into a large graduated cynlinder to find the relationship between the two. I found that as the depth increases, so does the pressure. One of the questions I'm stuck on for part of my lab ...
Monday, January 11, 2010 at 7:21pm by CL

I just did a lab on potential difference/voltage, resistance, and current. What would be good title for my lab? Thank You.
Tuesday, April 8, 2008 at 8:38pm by Tom

I did a lab on the potential difference and how it relates to the number of batteries connected. What would be a good title for my lab?
Tuesday, April 15, 2008 at 5:57pm by Tom

Science (Lab)
The first sentence i made a mistake i mean So I have to DO this lab for sci sorry about that
Saturday, October 8, 2011 at 2:27pm by Laruen

If you have the same lab as me read the introduction part of the lab... it has the answers for #1 and #2.... still stuck on #3 though
Sunday, November 28, 2010 at 11:34pm by Crzycoll

I did a virtual lab on acceleration on gravity on earth. That number is 9.81 m/s ^2. I don't understand the error that could have came out of this
Tuesday, June 21, 2011 at 2:21pm by Diana

Chemistry Lab
Some of this I'm sure you know how to do? If you want to show the experiment perhaps we can help you through it but no one here will write your lab report for you.
Sunday, October 28, 2012 at 9:35pm by DrBob222

Chemistry 2 Lab
Nevermind. I got it. It would help if I looked at the concentration data that my lab book gives me complete the problem:)
Tuesday, March 19, 2013 at 6:50pm by Robby

Honors Chemistry
We did a lab in class on Friday where we stuck a metal loop in various chemicals and stuck it in the flame of a Bunsen burner and we observed the flame's colors as the different metals went in. For every lab we do, we have to write a writeup which involves a graph. How could I...
Sunday, September 20, 2009 at 11:36pm by Emily

Is this a dry lab? If you did this in the lab you should know what you happened.
Monday, December 10, 2012 at 10:33am by DrBob222

to Math Mate
Kelly, Don't worry, I didn't forget about you. I will get back to you, hoping you would be reading up on simple harmonic motion in the mean time. It is a lab, and you will have to write it up. The better you understand the subject matter, the faster you will be able to finish ...
Monday, June 1, 2009 at 6:04pm by MathMate

i have to write lab report based on my determination of chemical formula & in lab we did experiment & found out the formula was cucl2*2h2o, in my lab report i have to start with mole to mole ratio how can i start writing that?
Wednesday, May 29, 2013 at 9:59am by Niki

Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture. ( post lab question for the Banana oil lab)
Tuesday, July 9, 2013 at 4:43pm by chelsea

I had to do the same exact lab...
Monday, June 19, 2006 at 4:17pm by asagga

Physics Lab
I'm doing a lab on centripetal force but I'm not sure how to make the graphs. If you search for "centripetal force lab" on Google and click "I'm Feeling Lucky" it will take you to the exact lab I'm doing. I'm supposed to graph Fc vs. Vt, Fc vs. Vt^2, and Fc vs. e^Vt, but I don...
Thursday, December 18, 2008 at 11:48pm by Bob

hcs 577
Evidentally you haven't been involved in the health care system. You go to a doctor, Dr. A. Before you see Dr. A, a medical records clerk scans your insurance card and completes the necessary paper work. Dr. A examines you. Dr. A's nurse draws blood and sends it Lab X to be ...
Monday, September 13, 2010 at 8:01pm by Ms. Sue

A subatomic particle has a 410ns lifetime in its own rest frame. If it moves through the lab at 0.970 c, how far does it travel before decaying, as measured in the lab?
Thursday, April 3, 2014 at 11:39pm by Amy

My science class is pretty small. There are just 18 students in the class. My teacher, Mr. Burnett, has an unusual system for picking lab partners. He has given each student a number from 1 to 18, and on lab days, he pulls two numbers out of a bag to match people up. During ...
Tuesday, November 1, 2011 at 12:22pm by Linda

Chemistry Titration Lab HELP!
i have a titration lab with sodium hydroxide with an unknown vinegar all i know is we have 0.3 M sodium hydroxide solution (250 mL)and a 50ml burette that when titration was done the avg. of 3 trials was 27.7 mL im not sure what id write for the hypothesis of this lab or what ...
Wednesday, June 11, 2008 at 2:11pm by student

hey UCI! a. HCl b. HNO3 c. NaOh d. K2CO3, also in the lab we did. it all depends on the cation (k, li, and na) which one has the highest mass e. AlCl3 (that was in the lab we did.)
Wednesday, January 12, 2011 at 9:47pm by anonymous

In the frame of reference of the slower particle (as seen in the lab) the speed of the other particle is +0.920c. To get the lab speed of the faster particle, you have to do a transformation back to lab coordinates, with a relative velocity of 0.580c Th relativistic formula ...
Sunday, April 13, 2008 at 12:42pm by drwls

Chemistry: Bunsen Burner Lab
Hi! I have recently completed a bunsen burner lab and need help with a few conclusion questions: 1) What kind(s) of energy is released by the reaction of fuel and air in this system? 2) Which part of the Bunsen flame is hottest? How do you know? ->I researched it and know ...
Monday, February 6, 2012 at 9:48pm by Cicilia

FACS - Reading Assignment (Q2) Check
3. Explain - Why are foods-lab tasks moved from one person to another? Answer - The reason why are foods-lab tasks moved from one person to another is because when team members work together to complete tasks in the school foods lab, the whole group benefits. am i correct?????
Sunday, April 22, 2012 at 4:32pm by Laruen

2 litres of acetronitrile is accidently spilt in a school lab of dimensions 40x20x10m and most evaporates calculate the ambient concentration of acetonitrile reach assuming that there are no air changes in the lab
Sunday, April 4, 2010 at 11:44pm by Heather

Psyics Lab ASAP
I have a lab where for accuracy I got -.32% and for precision I got 100.6%? What does that mean?
Tuesday, August 28, 2007 at 8:22pm by Jules

chemistry; Lab questions help=)
Perhaps another tutor will know the details of the lab but I don't. If you care to post a summary of the procedure perhaps I can help.
Thursday, November 12, 2009 at 5:13pm by DrBob222

I always have trouble with making an hypothesis for a lab. I was wondering if someone can help me come up with a hypothesis for a formation of salt lab. Thanks!
Saturday, November 13, 2010 at 4:25pm by Jennifer

Science 7R (Lab questions)
We did a lab today at science and for homework we have to answer questions about the Lab. I need help on 2. 12. Name two ways that a plant and animal cells differ in structure? 13. How are plant and animal cells different in function? She said that we have t write it in ...
Thursday, December 1, 2011 at 5:26pm by Laruen

In my science lab we tested anaerobic vs aerobic respiration. for the anaerobic we covered the test tubes with a plastic film. what is the term for that?
Sunday, March 9, 2008 at 10:03pm by Quick question

AP Chemistry
This is an Advance placement chemistry class. We were told to fine the materials needed to do this lab, and the procedure. i need this info so i can physically do the lab.
Tuesday, March 22, 2011 at 9:48pm by meghan

Tristan is laying 12" x 18" tiles on the lab floor. If the lab measures 15 feet by 18 feet, how many tiles does Tristan need, assuning there's no waste.
Thursday, February 6, 2014 at 7:58am by Anonymous

I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question I'm stuck on is " older bottles of benzaldehyde are often contaminated with ...
Tuesday, July 16, 2013 at 4:38pm by hayley

biochemistry with more info that was needed
these are pre-lab questions, so i haven't been given a ph yet. These are questions due before lab starts.
Sunday, January 27, 2008 at 5:35pm by stew

sorry this question is out of a lab and i didnt think that nobody would understand the change in temperature since they havent done the lab but that does answer my question.
Thursday, February 4, 2010 at 8:31pm by lelia

Organic Chemistry
JYD, that is word for word the question in my lab manual for the lab due today. Any chance you are in Orgo Lab at UNC Chapel Hill? To clarify the question DrBob222, is there a difference between the oxidation states of the other carbons in isoborneol and the carbon bonded to ...
Monday, March 24, 2008 at 9:05pm by LadyLiz

Currently studying for an lab exam. Just have a few question about a typical Iodine Clock reaction lab. In an typical Iodine Clock reaction lab what would be the state of effect of an increase in the initial concentration of thiosulfate ion (S2O3 2-) and the increase in the ...
Friday, February 15, 2013 at 12:52pm by AhmadM

the biology class has a lab every days. the earth science class has a lab every three days . which class day do they both have class ?
Tuesday, October 22, 2013 at 6:26pm by mike

for intro in a lab report do u have to write the relevance to the world? ( if yes where would it go , after purpose?)and what would be a good hypothesis in a lab for acceleration due to gravity?
Sunday, October 11, 2009 at 7:53pm by just wondering

A research lab is planning to explore the North Pole. Ten members of the lab each have a dog team. There are 56 dogs in all. If there are only 7- and 5-dog teams, how many of each will there be
Wednesday, March 23, 2011 at 3:39pm by ASAP PLEASE

Physics Lab
If Fc is the centripetal force, it is equal to mV^2/R, NOT mg. The Fc vs Vt^2 graph should be a straight line. I don't know enough about your lab experiment to help more than that.
Thursday, December 18, 2008 at 11:48pm by drwls

Thanks I was thinking the same thing when my professor actually asked this question on our lab report well now I see why no one in lab could figure out the answer. Will print your rtesponse and share. Thank you I knew we were not all confused.
Friday, January 30, 2009 at 9:36am by Lumina

In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?
Tuesday, September 13, 2011 at 1:37pm by roshan

e) In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?
Tuesday, September 13, 2011 at 8:27pm by Priya

I understand that I already did the lab... these are the results from the lab.... I did two trial I am having trouble finding the volume of O2 STP and the mole STP what do I use to figure out those volumes
Wednesday, October 17, 2007 at 9:41pm by Taylor

oh ok..i just wasnt sure if the vinegar was acetic acid because the procedure saud determining the concentration of acetic acid in an unkown sample of vinegar. thank you very much though! oh one last question, i understand the purpose of lab and how to conduct the lab but im ...
Sunday, December 14, 2008 at 8:56pm by student

Chemistry lab
I did a copper cycle lab and my final weight of the copper is less than what i started with. Where did the lost copper go?
Sunday, April 24, 2011 at 3:39pm by Lindy

lab directions
i have to do a lab on finding the melting point , but i do not understand these instructions : for the known sample raise the temp until it is within 10 to 20 C of known value, and then lower the rate of heating to 2-3 C per minute ?? please explain with the temperature of 120 C
Thursday, September 8, 2011 at 9:16pm by lon

Can anyone tell me what happens when you do the diffusion lab? It is the one where you take food coloring and drop it into hot, cold and room temperature water and tell the differences.I need all the info.... please help.
Wednesday, April 2, 2008 at 8:46pm by Molly

In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 16% of your total grade, each major test is worth 21%, ...
Sunday, June 3, 2012 at 1:39pm by Ashley

Pharmacy Tech
Rx: Prostaglandin E 10mcg/mL If the stock container of prostaglandin E is 100 mg/mL, how many 9-mL dilutions are required to prepare the ordered concentration?
Saturday, January 1, 2011 at 9:52am by Isha

Chemistry lab
In my lab class I am having to write a lab experiment and preform it tomorrow. It deals with specific heat of unknown metal and density. the first part you have boil water with the metal in it, and then put it in a cup and measure the temp change. I have completed to specific ...
Monday, November 5, 2012 at 1:41pm by Paco

I am doing this exact same lab. Was your answer- test tube a, b, and c have an excess of CuSO4 -correct? That is the same answer I got from doing the lab, and that is what I would recommend answering.
Saturday, November 14, 2009 at 3:22pm by AOP student

If you have a .045 M solution of sodium hydroxide, how many mL of the solution do you need to neutralize 6.5 mL of a .055 M sulfuric acid solution? do i use the equation M1V1 = M2V2?? or is that for dilutions
Sunday, September 6, 2009 at 5:01pm by sam

Hello, I am doing a physics experiment regarding rotational motion and equilibrium. We have the following lab setup and are supposed to find the unknown mass. How should I approach this? file:///C:/Users/Rahul/Desktop/Lab%20Drawing.jpg
Wednesday, February 9, 2011 at 6:18pm by Rahul

I have never had a student post an entire lab online. Do you want me to do it for you? I will be happy to critique your thinking or work. This is a very elementary lab, I have done this for elementary school teachers.
Sunday, February 1, 2009 at 11:02am by bobpursley

Hello, what is the format of "affiliation" in a lab report? A lab report? Are you sure this isn't a science assignment?? ??
Tuesday, December 5, 2006 at 9:58am by Kate

Yeah...but I didn't get it from there if that's what your thinking..It's from my lab book that I just got a week ago Dr.Bob. Technically I wanted to go and figure out what would theoretically happen if I mixed them before my actual lab I would have done the same if I was doing...
Monday, September 3, 2007 at 12:11am by ~christina~

I did a lab in chemistry about weighing table salt and sand and mixing it with water and pouring it through a funnel. One of my lab quetions was, What are some possible sources of error in this activity? First of all, I don't know what this question means. Can anyone please ...
Saturday, August 28, 2010 at 6:04pm by Jennifer

In the lab I had a strip of magnesium that weighed 0.029 grams and I added 15 milliliters of 0.5 M hydrochloric acid into a flask and I never used any water during the lab. So I don't really understand where I would get the water vapor pressure.
Sunday, July 15, 2012 at 12:07am by Zach

Sources of error for lab
when doing a chromotography lab what are the sorces of error
Saturday, September 15, 2007 at 7:39pm by Anonymous

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