Thursday
September 29, 2016

Posts by candy

Total # Posts: 389

Chemistry-help needed
Can we use an ACS/AR grade chemical for UV spectrophotometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
February 21, 2011

business
4. List at least three steps that make-up a workable plan and explain why each is important.
February 21, 2011

Chemistry-pls help
Can we use an AR grade chemical for UV spectrophotometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
February 17, 2011

Chemistry-help needed
Can we use an AR grade chemical for UV spectrometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?
February 17, 2011

Chemistry - help thanks
A supplier provides "Chemical A, 98%, for synthesis". Another supplier provides "Chemical A,98%, Lab grade" Are they equivalent? Which is better for analytical use? Thanks.
January 13, 2011

Chemistry-help
How does a "chemical for synthesis" compare with the same chemical(ACS grade)when used in analytical testing? Posted by candy on Tuesday, January 11, 2011 at 2:10pm. Chemicals are supplied in different grades,e.g. ACS,AR...etc.What do we mean when we say that the ...
January 12, 2011

Chemistry
Chemicals are supplied in different grades,e.g. ACS,AR...etc.What do we mean when we say that the chemical is for synthesis?
January 11, 2011

Chemistry
We are always told to use freshly prepared potassium iodide (KI) for titrations. Why?
January 8, 2011

Chemistry
Are the following chemicals light sensitive? 1) Potassium Iodide (KI) 2) Sodium thiosulphate (Na2S2O3)
January 8, 2011

geometry
For an octahedron, V =__8__, F = __6__, and E = __12___.
December 13, 2010

soc 120
These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 6/26/2011 Time Spent: 1 h , 21 min , 13 secs Points Received: 22 / 25 (88%) Question Type: # Of ...
December 12, 2010

Algebra/ A.S.A.P
thank you
November 27, 2010

Algebra/ A.S.A.P
Need help. I want to cut an extremely long problem that I just solved however I am trying to find out how -1.9 = -0.02t equals T= 93.0??? I tried dividing, multiplying and subtracting -1.9 and 0.02 together. 93.0 as the final answer was also rounded to the nearest tenth. Thank...
November 27, 2010

ALGEBRA/ PLEASE HELP
oh yes!! ur right. my mistake...thank u so much :)
November 22, 2010

ALGEBRA/ PLEASE HELP
Am I correct? Find the slope and the y intercept of y = - 10/3x - 9/2. The slope is -10/3 because this is what is in front of x and the y - intercept is (0, -9/2)? The second question is I need to find the slope of a graph that was provided for me. The y intercept is (0,6) and...
November 22, 2010

ALGEBRA
A-HA! I see now. Thank you.
November 20, 2010

ALGEBRA
I need to find a slope and y intercept of the line and write the fractional answers in lowest terms. 2y+8x+3=12+8x; I would like to try this one and get your input. 2y+8x-8x-12-3; 2y/2 = 9/2; y = 9/2 however I did not find the slope. I don't think there is one in this ...
November 20, 2010

PLEASE HELP/ALGEBRA 1
Thank you so much
November 19, 2010

PLEASE HELP/ALGEBRA 1
PLEASE HELP THANK YOU. I need to evaluate this equation with the following inputs. F(x) = 5x -12 Input: 3 and 2
November 19, 2010

math
I got it. Great! Thanks!
November 17, 2010

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
November 10, 2010

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
November 10, 2010

English
Which sentence is correct? 1) Check the manufacturing dates of the products. or 2) Check the manufacture dates of the products.
October 17, 2010

English
Which sentence is correct? 1) This product is due for retest. or 2) This product is due for retesting.
October 17, 2010

Chemistry-pls help urgent
Hi, if I want to prepare a w/v solution, how do I prepare it? Thanks a lot.
October 12, 2010

Chemistry-pls help urgent
this 17% ammonia is to dissolve my chloride ppt
October 12, 2010

Chemistry-pls help urgent
Posted by candy on Tuesday, October 12, 2010 at 5:04pm. 1) How do I prepare 2M nitric acid from 65% concentrated nitric acid? 2) How do I prepare 17% ammonia from 25% concentrated ammonia? Please show calculation steps. Thanks. Chemistry -pls help urgent - DrBob222, Tuesday, ...
October 12, 2010

Chemistry -pls help urgent
Assuming it is w/w as is the case for most acids and conc ammonia, can you show me the steps using 69% HNO3 and 28% ammonia? I have density of 69% HNO3 as 1.42g/ml & 28% ammonia as 0.88g/ml.
October 12, 2010

Chemistry -pls help urgent
1) How do I prepare 2M nitric acid from 65% concentrated nitric acid? 2) How do I prepare 17% ammonia from 25% concentrated ammonia? Please show calculation steps. Thanks.
October 12, 2010

Chemistry
1) What is the pH of 3M KCl? 2) In general, is Ag2SO4 considered soluble in water?
September 25, 2010

Chemistry
Thank you very much. Another question, why do we need to add 1ml of dilute nitric acid to the 50ppm standard NaCl solution before adding AgNO3?
September 24, 2010

Chemistry
This is a limit test for chlorides. 1.0g of NaOH sample was dissolved in 5ml of deionized water, acidified with 4ml of concentrated nitric acid (65%) and diluted to 15ml with deionized water. (Test tube A) 10ml of 50ppm Standard NaCl solution was prepared. 5ml of water was ...
September 24, 2010

Chemistry -thanks
Hi,there was an error with the procedure. 1.0g NaOH sample was dissolved in 5ml of water and acidified with 4ml of conc. nitric acid,not dilute nitric acid. This was then made up to 15ml with water.After acidifying with conc. nitric acid instead of dilute nitric acid, no such ...
September 23, 2010

Chemistry - urgent help needed
The following is part of a procedure for a limit test for sulphates in an NaOH sample:- Dissolve 3.0g of NaOH in 6ml of deionized water, adjust to pH 7 with 12M HCl (about 6.2ml) and dilute to 15ml with deionized water. When about 6ml of 12M HCl was added, a white ppt was ...
September 22, 2010

Chemistry - pls help
Doesn't my 4ml HNO3 acidify the solution? What should I do then? Add another 1ml of dilute Nitric acid?
September 22, 2010

Chemistry - pls help
This is a limit test for chlorides. 1.0g of NaOH sample was dissolved in 5ml of deionized water, acidified with 4ml of dilute nitric acid and diluted to 15ml with deionized water. (Test tube A) 10ml of 50ppm Standard NaCl solution was prepared. 5ml of water was added, follwed ...
September 22, 2010

Chemistry - more advice needed thanks
I obtained a lot of dirty brown ppt the moment the mixture was poured into AgNO3 solution. Does this mean my NaOH sample contains a lot of chlorides? Could other silver halides be present? However for my control solution of 50ppm sodium chloride solution,a cloudy white ppt was...
September 21, 2010

Chemistry - bobpursley pls help
Posted by candy on Tuesday, September 21, 2010 at 3:12pm. Yes, my NaOH is granular. Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on ...
September 21, 2010

Chemistry - help
I obtained a lot of dirty brown ppt the moment the mixture was poured into AgNO3 solution. Does this mean my NaOH sample contains a lot of chlorides? Could other silver halides be present? However for my control solution of 50ppm sodium chloride solution,a turbid solution (...
September 21, 2010

Chemistry - help
This is a test for chlorides in NaOH sample. 1.0g of NaOH was dissolved in 5ml of distilled water, acidified with 4ml of dilute nitric acid and diluted to 15ml with distilled water. This mixture was poured into a test tube containing 1ml of AgNO3 solution. However, I obtained ...
September 21, 2010

Chemistry - repost
Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on Tuesday, September 21, 2010 at 10:03am. The following is part of a procedure for a limit ...
September 21, 2010

Chemistry - urgent
The following is part of a procedure for a limit test for sulphates in an NaOH sample:- Dissolve 3.0g of NaOH in 6ml of deionized water, adjust to pH 7 with HCl (approx.7.5ml) and dilute to 15ml with deionized water. Please explain how to perform this procedure. Conc HCl or 1M...
September 21, 2010

math
how do you write twenty-two millionths? (in standard form using numbers)
September 18, 2010

math
write in standard form using numbers - Two thousand twelve ten-thousandths?
September 18, 2010

English
Oh my gosh! I wrote as anonymous because I was kinda embarrased about posting too many questions! Thank you soooo much for answering all my questions, and very fast,too! Thanks for also being extremely dedicated! It would be cool if you were my teacher in real life! :)
August 5, 2010

Homework
thanks writeateacher!
August 4, 2010

Homework
ps I haven't had the chance to get any of the books so far :(
August 4, 2010

Homework
I am going to a school for gifted kids on September and I am very excited! However, they gave me like 5 packets of hard homework that are very time consuming. On top of that, I have to read countless books, write book reports about them, and then choose 1 book and write like a...
August 4, 2010

English
thanks!
August 4, 2010

English
Are these correct? Here, I am supposed to label the sentences interrogative,exclamatory,imperative, and declarative. Then, I have to put the correct punctuation mark beside it. 1.Look at the apes Look at the ape (imperative) 2. How clever they are How clever they are! (...
August 4, 2010

English
thank you Ms.Sue! You werew a big help! The adverb is clearly early.
August 4, 2010

English
Can anybody explain to me howe to find the adverb in a sentence? For example 1.Maria rose early and watched the sun rise.
August 4, 2010

Math
Thank you Ms.Sue! Once again, you saved my educational career! I don't know what I'd do without you!
August 4, 2010

Math
Please help me! I found the mean temperature in a week in July, which was 87 5/7 degrees. I found the median temperature of the week, too which was 89 degress. Now can anybody help me compare the mean and median temperatures? This means a lot to e and I want to make a good ...
August 4, 2010

Math
Which % is lower 1.9% or 00131%?
July 29, 2010

engineering
why exponential model may be better choice for modelling data than the linear model.
June 19, 2010

math
A)4
May 30, 2010

Math
376.8 in.2
May 23, 2010

Algebra
29 C + C a right?
May 23, 2010

Math/ Probability
We have then only 6 positions to play with: 6 * 5 * 4 * 3 * 2 * 1 = 6! = 720
May 19, 2010

chemistry
Hey amanda what was the correct answer for g
May 7, 2010

algebra
-5x - 5y = -6 -5/2x - 5/2y = -6 a) (-2,2) b) (-2,-2) c)none d)infinite number of solutions and the answer i picked was c thanks
May 3, 2010

algebra
what is the solution of the following linear system? 5x - 2y = 15 5/3x - y = 5 a)(-2,1) b) none c)(3,0) d) inifinite number if solutions
April 29, 2010

math
How would you solve the problem (y^2-4w)^2
April 21, 2010

physical science
A butterfly at eye level is 18 cm in front of an plane mirror. You are behind the butterfly, 45 cm from the mirror. What is the distance between your eye and the image of the butterfly in the mirror?
April 5, 2010

MATH157
9-3= 6 We have then only 6 positions left to play with: 6 * 5 * 4 * 3 * 2 * 1 = 6! = 720
April 1, 2010

Statistics
Determine which of the four levels of measurement (nominal, ordinal, interval, or ratio) is most appropriate for each of the situations below. (2 points each part) 4a. The temperature of 10 light bulbs left burning for 5 hours 4b. The sample of pillows on the shelf categorized...
February 26, 2010

anthropology
Navajo Witchcraft
February 19, 2010

math
e = .02(190) = 3.8 right?
February 19, 2010

Physics
A penny is dropped from the observation deck of the Empire State building (370 m above ground). With what velocity does it strike the ground? Ignore air resistance. answer is in____ m/s.
February 7, 2010

Physics
An airplane lands and starts down the runway at a southwest velocity of 43 m/s. What constant acceleration allows it to come to a stop in 1.2 km?Answer is in ___ m/s2.
February 7, 2010

math 157
Sorry this is the right one.... The amount of background noise is important to television news reporters. One station developed the formula N = -r^2 + 12t + 54 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How...
December 15, 2009

math 157
The amount of background noise is important to television news reporters. One station developed the formula N = -r2 + 12t + 54 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How many seconds after the speaker ...
December 15, 2009

math
FALSE
November 20, 2009

math
so approx. 9 gal.
November 11, 2009

math
how many real-number solutions does the equation have?
November 8, 2009

geometry
triangle, quadrilateral, and hexagon
October 24, 2009

math
convert into a fraction, mixed number, or whole number 62 1/2%
October 18, 2009

philosophy
Hey everyone! If anyone of you know the answer to the below please let me know!! 1) How do dreams figure into Descartes conclusions in the first meditation about our beliefs? 2) Why does Descartes think that clear and distinct perception much be infallible? 3)Why does ...
October 17, 2009

world history quick question
If you were a Native American in 1492 how might your opinion of Columbus changed? (Not a homework question just curious of your opinion)
September 20, 2009

world history quick question
I have: - He enslaved the natives and took their land -he Christianized and civilized the natives
September 20, 2009

world history quick question
How did Christopher Columbus change the Native American lives I need 5 reasons and I only have 2. (I need 3 more)? Plz help!
September 20, 2009

math
Which chart would be more effective a bar graph or pie chart?
September 19, 2009

Math
That helped, Thanks!
September 18, 2009

ALGEBRA
a. e = .02(175) = 3.5 b. e = .02(190) = 3.8
September 16, 2009

question about math (law of syllogism/detachment)
Does anyone know about the law of syllogism and law of detachment. If so, can you check my work.
September 13, 2009

French
Can you check these: Directions: State whether the sentences are vrai or faux? 1. Un bagage à main est une très grande valise. Answer: faux 2. Avant un voyage on fait ses valises. Answer: vrai 3. Un vol intérieur est un vol entre deux pays. Answer: vrai 4...
September 11, 2009

World History
(This is no homework question I was just curious) Without the invention of the printing press would the reformation still occurred?
September 9, 2009

World History
from your point of view do you think his choice of leaving the catholic church was right?
September 9, 2009

World History
When Henry viii broke away from the Catholic church was his reasoning justifiable? I really need help for this question.
September 9, 2009

World History
How do catholics gain salvation? How do lutherans gain salvation?
September 9, 2009

World History
Is the answer this: To brake away from the Catholic Church he called on the German Princes to overthrow the papacy in Germany and establish a reformed German Church.
September 9, 2009

World History
How did Marin Luther brake away from the Catholic Church?
September 9, 2009

finanace
After a protracted legal case, Joe won a settlement that will pay him $11,000 each year for the next ten years. If the market interest rates are currently 5%, exactly how much should the court invest today, assuming end of year payments, so there will be nothing left in the ...
September 8, 2009

math
8+4(2+7)/3=20
August 26, 2009

math
how do you solve this equation: 12n=9(n+10)
August 26, 2009

MATH Prob.
We have then only 6 positions to play with: 6 * 5 * 4 * 3 * 2 * 1 = 6! = 720
August 12, 2009

business statistics
The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines were to have ȭ = 413/6 miles and s= 42.8 miles, would this tend to cast doubt on the reported ...
July 30, 2009

Conflict Resolution and Team Dynamics
Define conflict and explain how constructive and destructive conflicts are different
July 29, 2009

math
We have then only 6 positions to play with: 6 * 5 * 4 * 3 * 2 * 1 = 6! = 720
July 29, 2009

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. Next>>