Friday

December 19, 2014

December 19, 2014

Total # Posts: 893

**Redox Titration questions!**

Oh goodness, I'm such a pain! I need some help with these! How do I calculate the percentage? How do I start it? 2. Imagine that you ran a similar titration using a different iron sample with 0.02 M KMnO4 as the titrant. Calculate the percent of iron in the sample if the ...
*June 11, 2008*

**Chemistry Titration Lab HELP!**

Okay, finished some Chem quizes, and now here's number 3, with DrBob222's directions (hope I did this right: Titration using 50mL of HBr acid with 37.7mL of 0.57 M NaOH base. Home many M NaOH base in titration (mol= M * L) 0.57 * 0.0377 L= 0.21489mol NaOH base. ...
*June 11, 2008*

**Chemistry Titration Lab HELP!**

Okay, for number 1 and number 2, they were both for an experiment that was online, sorry for the confusion- I think I'll be fine answering it! If anything, I'll ask about it with specific detail- thank you guys!
*June 11, 2008*

**Chemistry Titration Lab HELP!**

Oh, thanks SO much DrBob222! I'm going to go step by step the way you dictated it! I'm going to try and work it out right now!
*June 11, 2008*

**Chemistry Titration Lab HELP!**

Oh, PERFECT! Thanks you so much! I'll check the 7th one right now!
*June 11, 2008*

**Chemistry Titration Lab HELP!**

Hi everyone! I just got a new lab that I MUST complete today, and it's about titration- I have absolutely no clue how to do it, it just doesn't make sense to me! I hope that someone can help explain to me how to do it so I can finish ASAP!! Thanks a lot, -Angel Lab--...
*June 11, 2008*

**french**

je m'arrete means i stop myself j'arrete means i stop or i am stopping
*June 7, 2008*

**Biology**

Does anyone know of a good site with information about chinese forget-me-nots also known as cynoglossum amabile?
*June 7, 2008*

**CHEM LAB!!! Must finish!!!**

Thanks to DrBob222 for the help, but it only answered a few questions! PLEASE help answer, anyone? This is a chemistry lab on boiling point, and I need some help with these questions!- Thanks! (Info): You are going to take a trip. On this trip you will be stopping at different...
*May 30, 2008*

**Chemistry test HELP!**

THANK YOU! You are great!!!
*May 30, 2008*

**Chemistry test HELP!**

Oops! Choices: insoluble, immiscible, soluble, unsaturated, saturated ,supersaturated, osmosis, reverse osmosis, semi-permeable membrane, non-volatile, boiling point, freezing point, capillary tubes, atmosphere, volatile, solvent, condensation, evaporation, higher, lower
*May 30, 2008*

**Chemistry test HELP!**

A/an _____ solution is able to dissolve more solute. Choices: insoluble immiscible soluble unsaturated saturated supersaturated osmosis reverse osmosis semi-permeable membrane non-volatile boiling point freezing point capillary tubes atmosphere volatile solvent condensation ...
*May 30, 2008*

**Chemistry**

On question 4b- what would the boiling point be, I can't figure it out? I'm not sure how to answer it!
*May 30, 2008*

**Chemistry**

Thanks for the help!!! Any other answers would be much appreciated- THANK YOU SO MUCH! The lab is much easer to understand now!
*May 30, 2008*

**Chemistry**

This is a chemistry lab on boiling point, and I need some help with these questions!- Thanks! (Info): You are going to take a trip. On this trip you will be stopping at different sites with varying altitudes. At each site you will compare the change in pressure and boiling ...
*May 30, 2008*

**Decimal fractions**

i need help............... explaning decimals
*April 24, 2008*

**science**

I need to find out the connection between chromosomes and schizophrenia for a paper
*April 14, 2008*

**environmental science**

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost into the air. Most of ...
*April 13, 2008*

**environmental science**

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost into the air. Most of ...
*April 13, 2008*

**english**

(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers has been accompanied ...
*April 13, 2008*

**Critical Thinking**

Thanks, you're a gem!!
*April 13, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

her brother said he wanted his palm red
*April 6, 2008*

**math**

how would i work this out sari has 7/12 yards of material does she have more or less than 8 yards of cloths?
*March 31, 2008*

**math**

how do you find the area of irregular figures
*March 25, 2008*

**chemistry**

what is the electron geometry of F^2, HF ?
*March 18, 2008*

**Chemistry**

like dissolves like. polar solvent dissolves polar substances and non polar solvent dissolves non polar substances.
*March 17, 2008*

**Chemistry**

Of the following, _______ is a correct statment of Boyle's law.
*March 17, 2008*

**economics**

For me, or shall I say my book the CA= EX-IM, which you also wrote balance of trade. I know that perfect economy is when the supply equals demand. But I can't see why a surplus for a country is bad!! More money means that the country can save more and therefore invest more...
*March 16, 2008*

**economics**

is a large current account surplus ever a negative situation for a country?
*March 16, 2008*

**chemistry**

how to draw the structure of (AlHAtCl_2)^-
*March 11, 2008*

**Physical Science**

A microwave oven has a power requirement of 1248 W. A frozen dinner requires 4.1 min to heat on full power. How much electrical energy (in kWh) is used?
*March 10, 2008*

**scientist**

In What role does Galileo play in for the theories of geocentric and heliocentric?
*February 11, 2008*

**Economics**

What is the difference between NNP(national net product) and GNP (Gross national product)?? For me it seems the same!!!
*January 20, 2008*

**literature**

the label detective novel is an example of
*December 16, 2007*

**social studies**

how did the cotton gin affect production?
*December 11, 2007*

**science**

How does science work together to forecast hurricanes ?
*December 3, 2007*

**science**

1.Explain how scientists work together to forecast hurricanes? 2.What damage can occur from a storm surge? 3. where does a tropical strom get its energy? 4. Which statment BEST describes a hurricane? A.Its wind are at least 119km per hour OR B. It forms within a thunderstrom
*December 3, 2007*

**chemistry**

Explain what subatomic particles mke up an atom and how are they arranged
*October 15, 2007*

**Chemistry**

Explain what subatomic particles mke up an atom and how are they arranged
*October 15, 2007*

**Word Problem**

W= 336/4=84ft where did you get the 4 you divided by?
*October 10, 2007*

**Word Problem**

A developer wants to enclose a retangular grassy lot that borders a city street for parking. If the developer has 336 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed. I went back and worked the problem again to make ...
*October 10, 2007*

**Word Problem**

I have a couple of questions. Could you please check one of them and help me with one? 1. You have a 256 feet of fencing to enclose a retangular region. Find the demensions of the rectangle that maximize the enclosed area? This is what I did: a=xy 2x+2y=236 I subtacted 2x from...
*October 9, 2007*

**english**

i need to know about criteria in evaluating a subject. the essay is 1400 words long, and i have to use criteria to evaluate the subject, then within that, judge each criterion. is the criterion the facts about the topic, or is it who, when, what...?
*September 28, 2007*

**chemistry**

Doing the same problem, and i dont either
*September 16, 2007*

**Math(Geometry)**

Thanks so much for posting these questions!! I was stuck on number 15 too. Then i found this site and it helped so much.
*August 22, 2007*

**math**

Rewrite the equation 4x – 6y = –30 as a function of x. Subtract 4x from both sides of the equation. Then divide both sides by -6. You should end up with an equation for y, as a function of x.
*August 5, 2007*

**maths**

The data in table below gives marks for an exam of a particular tutors students in 2005 and 2006. Year students marks on the exam 2005 75 86 91 65 83 75 88 90 66 99 2006 60 78 75 98 79 90 80 88 81 90 from the following choose two options which are true about the table above. a...
*May 19, 2007*

**math 3rd grade**

what is an arrary ? look for the answer in the back of your math book...there may be a glossary An array is a table of numbers. can you help me with my math homework on internet
*May 1, 2007*

**MATH**

45.98 mg
*April 29, 2007*

**MATH**

I need to find the gratest possible error for each of the following measurments. 45.98mg 12 1/4 in. 54.4cm
*April 29, 2007*

**maths**

for this quadratic equation: y2-4y-16 = 0 which two options are correct solutions, rounded to three decimal places? 1) -4.483 2) -3.243 3)-2.472 4) -1.472 5) -0.536 6) 5.243 7) 6.472 8) 12.443 You have to use the quadratic equation, we will be happy to check your work. the ...
*April 15, 2007*

**maths**

for this quadratic equation: y2-4y-16 = 0 which two options are correct solutions, rounded to three decimal places? 1) -4.483 2) -3.243 3)-2.472 4) -1.472 5) -0.536 6) 5.243 7) 6.472 8) 12.443 Use the quadratic equation, we will be happy to critique your solution.
*April 15, 2007*

**math**

Baseball Nick throws a baseball upward with an initial velocity of 60 feet per second. What is the maximum height of the ball after Nick releases the ball? Formula for the problem - h(t)=v0t-16t^2, h(t)= the height of an object in feet, v0=an object's initial velocity in ...
*April 14, 2007*

**earth science**

how can the interactions between the earth systems affect the climate?? any one help me i dont knw where to start and i need to write 700 words on it Step one is to read your S103 course materials rather than try to get someone else to answer it for you.
*April 14, 2007*

**chemistry**

what is the clinical importance of doing the amino acid sequence determination Since this is not my area of expertise, I searched Google under the key words "amino acid sequence determination" to get these possible sources: http://en.wikipedia.org/wiki/...
*April 13, 2007*

**Statistics**

Here is one that I really would like to know if I have the right answers- In data from a sample of 400 cases, a variable has a 95% confidence interval of 54.3 to 54.7 find the following: Mean, standard deviation and standard error. I have come up with the following Mean 54.5 ...
*April 12, 2007*

**statistics**

The average time in data to process orders received by a metal fabrication company is to be estimated. A sample of 20 orders is randomly selected from a total of 200 orders processed over a 6 month period and the sample mean is 5.4 days with a standard deviation of 1.2 days. ...
*April 11, 2007*

**Statistics**

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*

**Statistics**

data from sample of 400 cases, variable has 95% confidence interval of 54.3 to 54.7 I found the mean- how do i find standard error- step by step please. Standard error = sd/√n Note: sd = standard deviation; n = sample size. You'll need to determine the standard ...
*April 10, 2007*

**math**

what does x= to 4-2x=7x+13 add two x to both sides 4=9x+13 subtract 13 from both sides. -9=9x divide both sides by nine. 4-2x=7x+13 add 2x to both sides 4-2x + 2x =7x+13 + 2x 4 = 9x + 13 add -13 to both sides 4 - 13 = 9x + 13 - 13 -9 = 9x divide both sides by 9 -1 =x
*April 9, 2007*

**sceince**

what difference would there be in the product cells at telophase II of the meiosis if there had been one crossing over at a position half way betwwen the huntington disease gene and the centromere from one pair of autosomes (chromosome 4)has a short arm and a long arm on the ...
*April 7, 2007*

**science**

You move a 300N object 2 meters in 3 seconds. a. How much work do you do? b. What is your power?
*March 27, 2007*

**Economics**

What is the differemce between "the law of one price" and "PPP"? Check this site for explanations. http://internationalecon.com/Finance/Fch30/F30-1.php
*March 24, 2007*

**MATH**

HOW DO I SOLVE A QUADRATIC EQUATION BY FACTORING? Do you have a specific one? You factor it in this form: (x-a)(x-b)=0 then both factors , x-a, and x-b can be set equal to zero, and then x=a, and x=b.
*March 21, 2007*

**math**

5yd=how many feet There are three feet per yard. Do the multiplication three feet in a yard times 5
*March 14, 2007*

**chemistry**

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40m2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the diameter of an...
*March 9, 2007*

**law**

what is sexual orientation http://en.wikipedia.org/wiki/Sexual_orientation Sexual orientation is whether a person prefers people of his/her own gender or people of the other gender.
*February 2, 2007*

**Chemistry**

a scientist has 0.46 mL of a solution. how would she convert this volume to microliters?
*January 25, 2007*

**again economics**

Thx for answering before... This time I can find a anything about the 45 degree model which I have to charaterize! I'm not quite sure what you mean by "characterize" so I can only hope the following will help you: http://www.amosweb.com/cgi-bin/awb_nav.pl?s=wpd&c...
*January 7, 2007*

**Economics**

I need help!! I got this question: Derive the IS/LM-model from the 45-degree model and the money market... Ideas...help anything! Thank you for using the Jiskha Homework Help Forum. Since you ask for "anything" here are some things I found re: IS/LM: http://www....
*January 7, 2007*

**Economics**

Microeconomics: Describe the diff. market forms ( I've done that) Under which equlibria and under which circumstances is sustainable profir possible? ( I am lost)
*January 5, 2007*

**Accounting**

Here is another question I am having trouble with, please help!!!! 3. The following totals for the month of March were taken from the payroll registrar of the X company: Salaries (all subject to social security & Medicare taxes $14,000 Federal income taxes withheld 3,500 ...
*December 5, 2006*

**Account**

Here is my question, please help!!! 5. Assume that Z company's chief financial officer gave you the following information: net sales, $3,800,000; cost of goods sold, $2,100,000; extraordinary gain (net of income taxes of of $7,000), $25,000; loss from discontinued ...
*December 5, 2006*

**math**

please help 5*10(-8 is a power for the ten) That would be 0.00000005 (seven zeroes after the decimal point) in decimal form. Do you have some other question about that number? Most of us would prefer you write that number as 5*10^-8 when typing scientific-notation on this ...
*November 24, 2006*

**science**

how do like electric chares react to each other? Like charges (both +, or both -) repel each other. Unlike charges attract each other.
*November 14, 2006*

**English**

Essay...What comparisons (similarities) are there between The Necklace by Guy de Maupassant and The Brother Grimm's verison of Cinderella? http://www.bartleby.com/195/20.html http://www.pitt.edu/~dash/grimm021.html They are both above, good short reads. I will be happy to ...
*October 17, 2006*

**science**

what is a earthquake look it up in a dictionary science is hard but hang in there If you want to read about earthquakes, an encyclopedia can give much information. Look on plate tectonics. The core of the earth is very hot and consists of molten magma. There are a number of &...
*October 10, 2006*

**Math**

Actually. it only takes 1 time to subtract 2 from 101 to get to 0. See, When you subtract 2 from 101 that's 99. But then you have to do it again. The problem is that you'll be subtracting 2 from 99. It's confusing i know.
*October 10, 2006*

**Accounting**

For each of the following items, give an example of a business transaction that has the described effect on the accounting equation: Increase an asset and increase a liability: Increase one asset and decrease another asset. Decrease an asset and decrease owner's equity. ...
*October 1, 2006*

**Math**

17.45 inches
*August 30, 2006*

**mathh (unit rate)**

okay I NEED HELP FAST!! if it cost $6.98 dollars for 24 cans of juice how much money would it be for 1 can of juice PLEASE RESPOND QUICKLY I NEED IT FOR TOMMOROW!! :) thanks
*August 22, 2006*

**sociology**

OMG! I am loving this site. I can't believe that I am the only one stumbling here in ETH125. Thanks for the hints from finding the answer on this week 2 question. I have been trying to google but have not gotten far on the different ways to measure prejudice. By the way, I...
*July 20, 2006*

**math check**

Posted by TchrWill on Thursday, July 14, 2005 at 5:44pm. 2.)The sum of four consecutive odd integers is -336. Set up an equation AND solve for all of the integers. Two ways to approach this. -336/4 = -84 making the 4 consecutive odd numbers -81, -83, -85 and -87. Alternatively...
*July 17, 2005*

**word problem**

13.
*July 16, 2005*

**word problem**

13.
*July 16, 2005*

**math**

just a little stuck can you help me out? 1.)Sales (in millions) of a company are modeled by the expression for x items produced and sold (in millions). If 4 (million)items are produced and sold, what would the sales be? 2.)The sum of four consecutive odd integers is -336. Set ...
*July 14, 2005*

**math**

what type of system would this be? y = 5x - 1 y = (1/5)x - 1 linear system one line intersecting with another line
*July 11, 2005*

**math**

x/2=3y/5 can you show me how you got the answer please y=3/4x-2 I don't think it is correct. Starting over To solve for y first multiply both sides by 5 (5)x/2=3y/5 (5) Cancel 5 on right side to get 5x/2=3y Now multiply both sides by 1/3 to get 5x/6=y
*July 7, 2005*

**Math**

A retired couple needs $12,000 per year in income to supplement their Social Security. They have $150,000 to invest to obtain this income. They have decided on two investment options: AA bonds yielding 10% per annum and a bank CD yielding 5%. (a) How much should be invested in...
*July 7, 2005*

**math**

I am a little lost on my homework can someone help me with these problems please! With a GM MasterCard, 5% of the amount charged is credited toward a rebate on the purchase of a new car. Express the R as a function of the amount charged A Write a formula that describes the ...
*July 4, 2005*

**Algebra**

If the temperature on the ground is 70 degrees fernhet, then the temperature at A feet above the ground can be found from the expression -0.0035A + 70. I need to find the temperature at the following altitudes a. 8,000 feet b. 12,000 feet c. 24,000 feet I am trying to ...
*June 24, 2005*

**Algebra**

Regarding real-life applications, when would a linear inequality be more appropriate to use than a linear equation? Give examples to help me better thanks a lot! When driving a car, the speed at any time should be less than or equal to the speed limit. A check written on an ...
*June 24, 2005*

**unscrambling word**

rivamoec
*June 14, 2005*

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