March 28, 2017

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Number of results: 35,044

Gen Chem II
Thanks for the information Dr. Bob. Would you be able to work it out so that I can actually see the steps with the numbers and follow from there. The question was on Vitamin K from Sunday at 2:44pm which you answered at 3:45pm. Thanks again. I am looking to get a tutor since I...
February 11, 2013 by Nefret

chem-follow up question to previous post
how do you calculate the molar mass?
October 6, 2010 by sara

follow up(for Count Iblis)
i have a follow up question for a previous post How do you know 2B is (20 "+" B) and not (2 "x" B) _______________________________________ to me this question does not make sense... it comes from a review packet for the SAT _______________________________________ Q: If 299 is ...
August 31, 2007 by manny

chem: Drbob222
Hi I have a follow up to a question that was answered previously. New question: So when the HPO4(2-) reacts with the NaOH, will the equation be this?: HPO4^(2-) + NaOH --> H2O + NaPO4(2-) But how do I write the equation for the H2PO4^- and HCl? H2PO4^- + HCl --> Here is ...
January 30, 2012 by jean

PHY: To AJAYB, follow up on previous response
First, I'd like to thank you for your response to my question. However, I had some follow up questions on your response from Saturday, July 28, 2012 at 8:27am. If you could take a look at that post and get back to me, it would be greatly appreciated.
July 29, 2012 by Dan

Chemistry (Analytical) followup
Thanks DrBob for answering the question! I was assuming it was something similar to that, but my confusion is that a follow up question is asking what happens to the dissolved Ca2+ if the pH is reduced to 2, so the pH has some effect, but I don't know what.
February 8, 2014 by Nathan Berry

life science , geography , history and math literecy
I am a grade 11 student and want to follow careers linked to geograpy . My problem is that most of the careers I am in interested in want pure math and im doing math literecy . My question is that , Is it possible for me to start mathematics in University so that I can follow ...
September 29, 2013 by felicia

so i posted this question yesturday and got some help. which is the stuff below. can you look at the last thing i said which was the answer i got by doing what DrBob222 said to do and tell me if its correct.(the question is the first section) thanks chem - hannah, A salt ...
November 10, 2010 by hannah

chem- drbob222 please help
my original question was: how do i figure this out?? How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25°C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February 23, ...
February 23, 2011 by Rebekah

Chem Help!
I really need help with this question for my chem H.W. 1) On a summer day in Breckenridge, Colorado, the atmospheric pressure is 525 mm Hg. What is this air pressure in atmospheres? (round to the hundredths place) atm
April 10, 2008 by Lisa

For Mathguru_ from statistic question on Tuesday April 10, 2007 follow up question- what if I wasn't given the standard deviation either- how would I solve this problem Other tutors can help, but without the previous information, it is impossible to help you. Please repost ...
April 11, 2007 by Angel

chem repost!
when drawing molecular shapes, how do you decide which atoms go on axial or equtorial? (the more electronegative goes on _____) please help, my textbook confuses me with exmaples that follow both sides!
November 11, 2007 by alex

Write a net ionic equation for the reaction that occurs when excess nitric acid (aq) and potassium sulfite (aq) are combined. Note: Sulfites follow the same solubility trends as sulfates.
October 27, 2015 by jim

K => I answered your question at bottom or next pg
I helped the best I could on your organic chem question
March 15, 2008 by ~christina~

I know that Reiny has answered this question on how to simplify this, but what steps do I follow? (r^2 s)^5
January 24, 2014 by Anonymous

2+7x8/4= 9x2=18 or 56/4+2=16 do i follow M.D.A.S or do I follow the problem? these have no parentheses.
December 1, 2008 by chauncey

English III
What is the theme of follow the poem Follow the Drinking Gourd? Give examples.
March 18, 2009 by James

This is a follow up on my other question: I need help on Mitosis, and cell reproduction.
October 1, 2010 by Lina

CHEM (DrBob222)
I had posted the question to that previous chem question, regarding Mo & V...they said that it should have been correct. What I am thinking that I was missing...must have been that I did not include 4s & then just not fill it. I had excluded it from my electron filling ...
November 26, 2007 by K

Sorry I wrote that wrong. The exact question from the textbook says, 'Comment of the effect of concrentration of reaction time.' I don't really understand the question.
January 7, 2012 by Arnold

U.S. Government
I'm struggling with answering this question and I would appreciate any help one could offer. I'm needing to answer the following question in paragraph form: Which one of these two philosophies do you think the Supreme Court should follow: judicial activism or judicial restraint?
October 16, 2010 by Susie

Chem question?
I have a homework question that says, If you were dissolving table salt in a beaker of water, what would a saturated solution look like (macroscopically)?
May 27, 2008 by Lisa

Chem help!
I need help for this question in combining gas law P1V1/T1=P2V2/T2. P1V1/T1=P2V2/T2 P1 is 1.5 atm V1 is a question mark. T1 is -20 °C K P2 is 2.6 atm V2 is 750 mL with a blank box underneath it. T2 is -5 °C K. How can I combine this question?
May 2, 2008 by Lizy

1.“Follow-up” or “followup” can be a noun or an adjective. A) True B) False I answered A 2. Select the 2 correctly punctuated sentences: A) His followup appointment is in 2 weeks. B) His follow up appointment is in 2 weeks. C) His follow-up appointment is in 2 weeks. I...
November 28, 2012 by Marie

Chem Home Work Help!
I am a bit confuse with a question from a home work that I need to do by today please help! HW question... 1) A sample of neon gas occupies 8.77 L at 20°C. What is the pressure, in atmospheres, exerted by 1.45 mol of this gas? When you've gotten the answer to this question ...
April 29, 2008 by Sujeil

I have a really urgent question. I am wondering wheter or not esters are polar and what types of intermolular forces they have. can anybody answer this question nvm
December 19, 2006 by steff

Chem simple question
how many mL of .135M Sr(OH)2 are needed to neutralize 35ml of .157M HCL I know the answer came out to 20.4 ml My only question is how do I convert HCL to Sr(OH)2
September 29, 2013 by Julie

In writing and balancing equations using sulfur chemists usually use the empirical formula, S, rather than the molecular formula. Why? I'm not sure how to answer this question.
March 2, 2016 by em

1. What evidence did ancient Greek astronomers have that Earth does NOT move? The answer is because of the lack of parallax, but then there's a follow-up question... 2. How do we knoew it DOES?
May 3, 2009 by Sally

Grammar and hyphens
Select the sentence which is correctly punctuated. A) He will follow-up in 4 weeks. B) He will follow up in 4 weeks. My answer is B
October 31, 2012 by Marie

org. chem
The question asks, "draw the hemiacetal obtained by addition of ethanol 2-methylpentanal" My question is how to do this problem? I know you can't actually draw it out on this site. However so I know how to do it on the upcoming test. Thanks :)
February 11, 2013 by meghan

science(chem 11)
did a lab on separation of salt and sand. the initial mass that my teacher gave me was the stock mixture that was: salt= 54.79g; sand= 97.90g. after the experiment my mass were as follow: salt= 1.35g; sand= 3.17g. question #1 was asking about the % composition of the mixture ...
October 14, 2016 by Annon

Language Arts (help Ms. Sue)
•What traits do leaders have? •What motivates individuals to follow the crowd? •How can others help us understand our own behavior? •When is it good to follow what others are doing? When is it bad to be a follower?
April 28, 2016 by FluttershyK22

Follow up to Angie's question? If both sides are not = then why is there an equal sign? And is the answer 2 or both 2 and -1? Thanks!
July 7, 2009 by Alicia

another chem question
Examine the following unbalanced chemical equation: CO(little2) + C --> CO Which of the following is the correctly balanced form of this equation? 2CO(little2) + C --> CO CO(little2) + C -->2CO CO(little2) + C(little2) --> CO CO(little2) + C -->C(little2)O ...
August 5, 2005 by alf

I have a question for chem 1LD webworks number 4. it asks to repeat the previous question steps and find the delta H for the high spin and low spin for Fe(ox)3 3- but calculate with B3LYP, 6-31G* instead of a semi-empirical
July 17, 2012 by Billy

what is the verbal phrase in this sentence? Victoria taught Priscilla to swim with the family dogs. Is it to swim with the family dogs or just to swim? In this sentence, what is the verbal phrase? He decided to follow Carol and the pig into the deep water. Is it to follow or ...
February 26, 2015 by kelley

Select the correctly punctuated sentence: A) He will follow up in 2 weeks. B) He will followup in 2 weeks. C) He will follow-up in 2 weeks. Answer A
November 27, 2012 by Marie

For the question(s) that follow, consider the following equation. 2Mg + O2¨ 2MgO How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?
April 27, 2010 by Anonymous

I had a Bio lab about gel electrophoresis and PCR. for each lab, we have to make up thoughtful, detailed questions. You don't have to answer the questions so please don't go through the trouble by answering them. The first question is about something we did in lab. My question...
December 1, 2009 by Anonymous

These sets of numbers all follow logical patterns. Which numbers replace the question marks? ( 00001, 00011, 00101, ?, 01001 )
December 16, 2008 by Tina

y912f / Spanish
Please go back to those two where I asked you to follow the 4 steps. I will NOT supply the answers until you do that! You need to proove to me that you can and will follow those 4 steps first! Sra
May 11, 2009 by SraJMcGin

The rate constant for a reaction is 4.65 L mol-1s-1. The overall order of the reaction is: zero first second third I am having trouble with the order of reactions. I don't understand this question. this is an assignment question but i have no idea how to do it.
September 25, 2010 by lucylu

What does the question in my post mean?
What does the following question mean? -- How can you live within a democracy that expects you to participate, to hold an opinion and vote and thereby control and be responsible for your society—but at the same time, you must surrender and follow the will of others if even ...
November 15, 2007 by Anonymous

These sets of numbers all follow logical patterns. Which numbers replace the question marks? ( 1, 8, ?, 64, 125 ) ( 00001, 00011, 00101, ?, 01001 ) ( 17,23,?,18,20,25,21,9,15,16 )
December 15, 2008 by Tina

These sets of numbers all follow logical patterns. Which numbers replace the question marks? ( 1, 8, ?, 64, 125 ) ( 00001, 00011, 00101, ?, 01001 ) ( 17,23,?,18,20,25,21,9,15,16 )
December 16, 2008 by Tina

Algebra-Another question
Evaluate 4log(4)8 Possible answers are: 4 0 8 1 Where do I start-I don't have an example to follow? Please give me a direction do I evaluate log(4)8 first
November 15, 2010 by Jesse

first, thanks so much Bob for helping me!!!! Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g NaCl/1mole NaCl)=0.278 g NaCl...
September 17, 2009 by Ally

physics - follow up question
so, (3.75)(4) + (.5)(3.75)(49) or 106.875 radians that's not the correct answer, so is it just the second part to find the additional angle? (.5)(3.75)(49) = 91.875 but it too is incorrect, what am I missing?
February 2, 2017 by luc

Hyphens are so confusing, so I'm asking for a little help. 2. Select the sentence which is correctly punctuated. A) He came in for his follow up. B) He came in for his followup. My answer: B 4. Select the sentence which is correctly punctuated. A) He will follow-up in 4 weeks...
February 14, 2012 by Jenny

Basic chem question
3dz2 how many orbitals can this have?? what is the z?
October 21, 2008 by Sally

no typeo dr bob... the question reads.. 0.788g/cc
July 17, 2013 by Leslie

Calc pt2
Original question: Posted by Lost One on Tuesday, March 5, 2013 at 12:04pm. Let f(x) = (2/3)x^3 - 2x + 1 with a restricted domain of [1,infinity]. What is the value of (f-1)'(x) when x = 13? •Calc - Steve, Tuesday, March 5, 2013 at 12:58pm since x = f^-1(y) and dx/dy = 1/y' ...
March 5, 2013 by Lost One

Follow on the Sall Sue question earlier. What frequency would be required for sally and her cheerful and hard-wroking partner to produce the standing wave with three nodes. Identify the steps.
April 23, 2010 by CJ

Responded to the original post and follow up at original site. If you have trouble finding it I can come back and paste the asnwer here. !
November 1, 2006 by DrBob222

Dr bob, can you check my reply to chem question from andy thanx
May 10, 2010 by Andy

honors Chem B
How do I find specific heat? from previous question.
September 1, 2011 by Deahna

no question - just thank you "drbob", you've answered a few of my questions.
July 14, 2012 by student

english--Please help me!!!
"Most Americans would follow a thinker rather than become one themselves." Please help me explain that sentence, and also give me examples!!!who is a thinker?? in what situation do they follow the thinker, and why????
January 27, 2011 by Vivian

us history
The Insular Cases stated that a.island territories do not have the full benefit of the American Constitution. b.the Constitution does not necessarily follow the flag. c.the Constitution does follow the flag. d.none of the above were true. I think it is B
January 17, 2009 by phil

how do u set up with problem How would you prepare 165 mL of a 0.0317 m solution of benzoic acid (C7H6O2) in chloroform (CHCl3)? Just follow the definition of molarity. M = mols per L of solution I am assuming the m is molarity. But if it is molality, then molality is mols per...
June 30, 2006 by UTramos

General Chem
So for Chem we have to answer a question asking why graphing is a more accurate method for measuring density than manually calculating the density. I originally thought that manually calculating was better, but my teacher told me that I would have to back that up with a lot of...
September 22, 2013 by Anonymous

Chem Question?
I answered this question already, but would like you to check if the answer I provided was right. If for some reason my answer was not right please provide me with the right answer. 1)The air in the inner tube of the tire of a racing bike has a pressure of 115 psi. Convert ...
May 5, 2008 by Lisa

Advice...about chemistry degree Dr.Bob
Based on the question topic posted by Britney below titled:In your opinion (your answer to this reminded me of something) (I posted the same thing there but I thought it was improper to piggyback on that post so I posted this under a new topic) I don't know where to start but ...
March 25, 2008 by ~christina~

When the question asks for the qualitative pH of NH3, how would I find the answer?
November 1, 2010 by nicole

science again last question
Can a chemical characteristic for the element Neon be that it is toxic to the air? thanks agian and that's the last question!! thank you!!! I'd say not. Try the chemical or physical properties listed here: http://environmentalchemistry.com/yogi/periodic/Ne.html#Chemical I don'...
November 15, 2006 by James

ndicate which species in each pair has the higher ionization energy. Choose at least one answer. a. Between K and I, I b. Between K and I, K c. Between Al and Al+, Al d. Between Al and Al+, Al+ e. Between Ar and Cl-, Ar f. Between Ar and Cl-, Cl- g. Between Mg and Ca, Mg h. ...
November 9, 2012 by Anonymous

Please check my answer(Social Studies)
In the Mayflower compact, why do the pilgrims "all due submission and obedience"? To show that they will remain sevants of God To show that they will follow the colony's rule•• To show that they will elect a colonial leader To show that they will follow the king of England
September 13, 2016 by Josh ticklish

Road surface
Follow-on from a previous question: is there a component of any vertical force resulting from the braking force a braking vehicle?
April 26, 2013 by Raymond

third grade hw help
My third grade is needing help with his science homework please the question is as follow List as many resources as you can that you use during one day? Thanks!
January 19, 2011 by Nicky

help me i hev a lab You need to post a question with details about what yo don't understand.
March 21, 2007 by cool

basic chem lab question
what is the mass of a typical 50 ml glass beaker in grams
September 21, 2008 by al

Hi in this question A typical intravenous dose of I-125 for a thyroid diagnostic test is 100 u Ci. What is this dosage in megabecquerels (MBq)? (3.7 x 1010 Bq = 1 Ci) my book solved it like this: 100 u Ci * 1Ci/1x10^6uCi * 3.7x10^10/1Ci * 1MBg/1 x 10^6 Bq = 3.7 MBq. My ...
May 2, 2011 by Blaze

I have a question concerning Spring Semester
Im a freshman in college and I just took Chem1, Trig, and Drama (12units). I am planning on taking Chem2, Pre-Calc, and Art1 for spring sem. (13units). I'm not sure if this is too much to take for next semester considering two five unit classes or should I add another class? ...
December 22, 2011 by L.Bianchessi

chem lab
I'm doing a lab on helium and hydrogen emission spectra. so I got violet 20.35cm blue/green 21.70cm green 22.75 light green 23.08 yellow 27.70 red 31.70 faint red 33.95 and I also have the wavelenghts for helium spectra, its given. like for ex. violet is 380-420, my question ...
April 28, 2008 by natash

this is a follow up question from my last one with the exact question If you dissolve 200 g of salt in 20 l of water, what is the density of that solution of salty water? Hint: In this particular example, assume that the total volume doesn’t change when salt is added to ...
February 25, 2017 by dean

I am a co-op student in a Grade 1 class have been preparing lessons have to develop a language lesson on Valentine's Day vocabulary and follow up with an activity I am being tested on this I just need a good idea once I have the idea the rest will follow
February 5, 2008 by Taunya

Health (Ms. Sue)
Compare the steps you should follow when helping a choking adult with those you should follow when helping a choking infant.
January 7, 2014 by Victoria

Health (Ms. Sue)
Compare the steps you should follow when helping a choking adult with those you should follow when helping a choking infant.
January 7, 2014 by Victoria

to bobpursley
My classmates friends want me to post their questions as well.Thats why there are multiple names is there a problem. Yes. You are posting duplicate or even triplicate questions. That is silly. If we have answered one, the answers to the others follow. People here are ...
November 3, 2006 by minemine

sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-axis ...
March 28, 2012 by shakti

sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-axis ...
March 28, 2012 by shakti

Hi , I have this question and I do not know what steps to follow. Please help guide me. It will be really appreciated. Calculate the extent of oxidation in a stream where water it's in equilibrium with atmospheric oxygen and had a pH pic 6.5 (a(H3O+) =antilog (-6.5) ). The ...
December 10, 2016 by Sarah

physics: BOB or DRWLS follow up question
What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i understand what you both did, but why can't you use the V = Vo + at equation and solve for acceleration there and use that in the EF = ma equation?
November 21, 2007 by beckii

Chem Help PLEASE!
Asked earlier but got no reply :/ hopefully I get one now cause I'm really stuck and can't completely my assignment cause of one question.. How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH ...
March 14, 2012 by Taylor

Follow this link please! It is an interactive question that I just cannot figure out webwork.math.nau.edu/webwork2/CFisher_136/Continuity/3/?user=aed73&effectiveUser=aed73&key=KwyySMKGHvKe32dogu0ViC6rI90u7iI9&displayMode=jsMath&showOldAnswers=1
September 16, 2011 by Aly

Calculate the H+ ion concentration given the following pH readings: a) 2.00 b) 9.50 c) 10.40 d)-125(is this a reasonable question neee help
November 30, 2012 by akira 12

DrBob222-re: chem question
Sorry, I did make an error when I posted the earlier question: It should have said: A solution has [OH-] = 2.0 x 10-^14 M. The [H+] in this solution is? I hope you can help. Thank you. Sorry about the earlier error.
April 23, 2015 by Cassandra

key contributors to Christianity's's impact on philosophy http://ca.answers.yahoo.com/question/index.php?qid=20061025190551AAhv40b Here's an interesting response to this same question. There are some good ideas here to follow up on. Please note that we don't do students' ...
January 31, 2007 by Shaun Clarke

vocab help
i need 3 sentences using wretched plz help Please do not post the same question twice. Please follow directions below and let us know what you have come up with. We will give you feedback on the sentences you write.
May 17, 2007 by anonymous

What do question about Aluminum, hand this is some general question about it can someone help me to answer them Why is it wise to clean the aluminum? Why is the reaction done in the hood? Why must suspended solids be removed from the basic solution? Why is an ethanol-water ...
July 27, 2008 by Josh

I have a question on this question would I forgo the sqaure root on this on because there is no sqaure except on the products side which is 2HI? I am lost because I set up ICE then got to: 54=(4X-0.09)^2/x*x Kc=[HI]^2/[x][x] At a particular temperature, Kc = 54 for the ...
March 23, 2010 by CC

When you are driving a golf ball,a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept incontact with the ball as long as possible.Why does this technique allow you to hit the ball farther ?
June 26, 2012 by brandy

Hi Steve, You helped me with a question earlier today about finding surface area of a triangular prism with the base being an equilateral triangle . I got the answer 386.6 Is this correct.? I tried to follow your equation and am having a bit of trouble. Thanks for all your help.
December 3, 2012 by Cherie

physical science
When you are driving a golf ball, a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball farther?
June 28, 2011 by Micah

physical science
When you are driving a golf ball, a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball farther?
June 28, 2011 by Micah

Which of the following is true regarding a restrictive adjectival clause? A. It will follow a general noun and is not set off by commas. B. It will be set off by commas. C. It will typically include the relative pronoun which. D. It will follow a proper noun.
June 14, 2013 by Cherokee

Chem II
When you are given a list of compounds that all have the same 0.2 m and the question which has the highest boiling point, how do you figure this?
June 6, 2008 by Ken

life skills
how do you make a good mission stement essay? Generally, a good mission statement will follow the outline below: 1. Who are you? 2. What do you do? 3. Why do you do it? 4. What is your promise? 5. Why is that your promise? 6. How will you fulfill your promises and expectations...
September 30, 2006 by Ana

Calculate the number of grams of Fe formed when 0.300kg of Fe2O3 reacts. Equation: Fe2O3+CO-->Fe+CO2 converted .300kg to 300g Balanced Fe2O3+3CO-->2Fe+3CO2 So I started by trying this: 300gFe2O3(1molFe2O3/159.687gFe2O3)...and then I don't know where I would go from there...
September 16, 2012 by Ezra

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