Posts by candy

Total # Posts: 399

PSY/315
Is a coefficient of variation a better measure of dispersion than variance?

chemistry
Which of the following are properties of basic solutions? a.They turn the dye litmus red. b.They taste sour. c.They feel slippery. d.They react with active metals to produce hydrogen gas.

Literature quick question
Thanks for all the help!!

Literature quick question
I am doing an argumentative essay on chemtrails and I need some help on the opposing side (what's their agrument). I have 2 points so far and I need three the 2 so far are: 1. Some say that the lines are contrails 2. Some say it's condensation from the jet engines when...

chemistry
I AM NOT SURE EXACTLY WHAT I SHOULD DO

chemistry
Which molecule or compound below contains a polar covalent bond? Student Response A. NCl3 B. C2H4 C. ZnS D. AgCl E. LiI

Chemistry-help needed
Posted by candy on Monday, March 28, 2011 at 3:15pm. 0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownish-yellow to green...

chemistry - help
0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownish-yellow to green. 1ml of 0.1M perchloric acid is equivalent to 34....

Chemistry-help needed
0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownish-yellow to green. 1ml of 0.1M perchloric acid is equivalent to 34....

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?

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

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?

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?

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.

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 ...

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?

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

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

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

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 ...

Algebra/ A.S.A.P
thank you

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...

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

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...

ALGEBRA
A-HA! I see now. Thank you.

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 ...

PLEASE HELP/ALGEBRA 1
Thank you so much

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

math
I got it. Great! Thanks!

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?

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?

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

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

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

Chemistry-pls help urgent
this 17% ammonia is to dissolve my chloride ppt

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, ...

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.

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.

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

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?

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 ...

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 ...

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 ...

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

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 ...

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...

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 ...

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 (...

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 ...

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 ...

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...

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

math
write in standard form using numbers - Two thousand twelve ten-thousandths?

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! :)

Homework
thanks writeateacher!

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

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...

English
thanks!

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! (...

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

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.

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

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 ...

Math
Which % is lower 1.9% or 00131%?

engineering
why exponential model may be better choice for modelling data than the linear model.

math
A)4

Math
376.8 in.2

Algebra
29 C + C a right?

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

chemistry
Hey amanda what was the correct answer for g

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

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

math
How would you solve the problem (y^2-4w)^2

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?

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

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...

anthropology
Navajo Witchcraft

math
e = .02(190) = 3.8 right?

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.

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.

chemistry
If its w/v...i think the answer is 25 grams

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...

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 ...

math
FALSE

math
so approx. 9 gal.

math
how many real-number solutions does the equation have?

geometry
triangle, quadrilateral, and hexagon

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

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 ...

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)

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

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!

math
Which chart would be more effective a bar graph or pie chart?

Math
That helped, Thanks!

ALGEBRA
a. e = .02(175) = 3.5 b. e = .02(190) = 3.8

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.

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...

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

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

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

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