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Questions (39)
A. The amount of an employee's income that an employer sends directly to the federal, state, or local tax authority
B. Taxes,
14 answers
10,783 views
A kicker strikes a ball with a strong force.
a) Explain the evidence that shows the ball is not filled with liquid? b) Describe
0 answers
409 views
what are some ideas for science fair projects gr.8?!?! and please give an experiment with it thank u!!
1 answer
752 views
what contributions has the arab society made to the canadian society?!?
ANSWER IN COMPLETE SENTENCES PLEASE AND EXPLAIN!!!!
1 answer
525 views
The current-density magnitude in a certain circular wire is J = (2.75 × 10
10 ⁄ )r 2 , where r is the radial distance out to
1 answer
2,039 views
does anyone know a poem about seashores and it has to be aroung grade 6 level thank u?
2 answers
529 views
what is an irregular polygon.
what is congruent. what are corresponding angles. what are corresponding sides. FULL SENTENCES
1 answer
516 views
can anyone plz tell me a gud story if u were evr a shape for example this wut my friend her shape was a rectangle she wrote that
0 answers
448 views
what are the characteristics of plants and animals
1 answer
735 views
y'=xy/2ln y how do you solve the differential equation by seperation of variables
1 answer
463 views
what is the material between 2900 kilometers and 5200 kilometers below earths surface inferred to be
3 answers
924 views
what comes next?
O,T,T,F,F,S,S,E,......
4 answers
506 views
Which sentence is better?
1. Between May 15, 1941-July 17, 1941, DiMaggio held the longest consecutive game hitting streak (56
2 answers
586 views
Which sentence is better?
1. On May 15, 1941-July 17, 1941, DiMaggio held the longest consecutive game hitting streak (56 games).
1 answer
525 views
I am doing a Frayer model and my spelling word is region.
That is a non-characteristic for region? Thank you for your help.
4 answers
470 views
what is the meaning of life?
1 answer
427 views
What is the effect of cyclohexane as the solvent in the electrophilic aromatic substitution of acetanilide by bromine?
1 answer
972 views
What is the effect of using cyclohexane as the solvent in the bromination of acetanilide?
1 answer
1,096 views
Why can't we add charcoal to benzoic acid in purification by sublimation
1 answer
698 views
"experiment: spectrophotometric determination of the acid dissociation constant of methyl red"
1. Why is pH plotted against
0 answers
544 views
"experiment: spectrophotometric determination of the acid dissociation constant of methyl red"
1. Why are matched cells used in
2 answers
747 views
Why is it important that the sequence of addition of reagents be followed? What could possibly go wrong when this is not
1 answer
644 views
Why is it important that the sequence of addition of reagents be followed? What could possibly go wrong when this is not
0 answers
690 views
I'm sorry but I still don't understand the concept of spectral analysis and the baseline. What does these words mean and what
1 answer
511 views
Why is an Fe3+ solution instead of an Fe2+ solution used in calibrating the spectrophotometer?
Note: hydroxylamine hydroxide is
0 answers
509 views
Why should an Fe3+ solution be used in calibrating the spectrophotometer for the spectrophotometric determination of iron in
1 answer
1,222 views
1. Why Beer's law is expressed in terms of absorbance instead of transmittance?
2. What is the significance of spectral scanning?
5 answers
728 views
In experiment concerning potentiometric determination of puriy and Ka of KHP, we obtained an experimental pKa of 5.04 and when
1 answer
675 views
Based on the experimental data, I was able to calculate the experimental pKa value which is 5.04 and the literature value of the
1 answer
651 views
what does it mean if I got a % relative error that is higher than 100%?
- would it mean that I did the experiment erroneously?
3 answers
501 views
The phosphorus in a completely dried fertilizer sample weighing 0.4498 grams was precipitated as MgNH4PO4*6H2O. The precipitate
2 answers
897 views
Please help me through this problem...
A 0.5117 gram fertilizer containing phsphorus was oven dried. The weight of the dried
3 answers
674 views
experiment: Gravimetric determination of moisture in fertilizer samples
1. What are the advantages of weighing by difference to
0 answers
781 views
1. What are other methods of moisture determination besides oven drying?
2. During the drying of samples, the weight is
0 answers
544 views
Topic: Iodometry
1. the reason why the Cu2+ solution has to be titrated immediately after addition of KI - I thought, because if
0 answers
529 views
Topic: Iodometry
1. the reason why the Cu2+ solution has to be titrated immediately after addition of KI Answered above.
0 answers
560 views
Topic: Iodometry
1. The importance of precipitating the Cu2+ ions using NH3 and redissolving it with acetic acid 2. What are
0 answers
735 views
What is an aliquot factor?
It is a whole divisor. For instance 5 is an aliquot factor of 15, and 15 is an aliquot factor of 150.
1 answer
1,716 views
Where can I find the answers to these questions in my text, "fundamentals of analytical chemistry" by skoog, west, holler and
0 answers
582 views
Answers (23)
1. B Correct 2. A Correct 3. B C STUDY GUID 88-93 4. B Correct 5. A Correct 6. B Correct 7. D A STUDY GUIDE 95 8. B Correct 9. C Correct 10. D B STUDY GUIDE 86-87 11. A Correct 12. B Correct 13. D Correct 14. A Correct 15. A D STUDY GUID 86-88 16. C B
D0 Light box
well not really because graphs are used to display your data, and just the date would be considered as ur info not the display.
its wrong!
u measure
i think its nombre
pollution, landfills, animals homes destroyed, less space on earth,
do u mean sling?
Well - Two fractions equivalent to 2/5: 4/10 an d6/15. - Two fractions equivalent to 7/11: 14/22 and 21/33. - Two fractions equivalent to 150/325: 300/650 and 450/975. To solve this you should of multiplied each fraction by a number (E.G. 2/2) For 2/5, I
Its name is methyl ethanoate. First, you must find the carboxylate part. In your case, this is ethanoate. Next, determine what is attached to the O (not the one double bonded to C) of the carboxylate. In your case, this is CH3 and you would call this
ln(K1/K2)=(∆Horxn/R)((1/T2)-(1/T1)) ln((6.5x10^-2)/K2)=((-49.5 kJmol^-1)/R)((1/(250+273.15))-(1/(100+273.15))) That's it! Just solve for K2. Don't forget that your R must have the units of kJ/molK. Hope this helps. Cheers!
you have 157.5 mmol of AgNO3 and 243 mmol of MgCl2. From the balanced chemical equation, 1 mol of MgCl2 would consume 2 moles of AgNO3. It would then require 315 mmol of AgNO3 to completely consume the MgCl2. Therefore, AgNO3 is the limiting reactant and
Here is another one: J,F,M,A,M,J,J,A,.....
Hint: The answer is not "E".
I think he did set more than 1 0r 2 records, right?
Power & greed are sometimes the main cause of war because: Power: You are strong & want to gain more land, food, things, etc... Definition: The possession of control or command over others; authority. Ability to do or act; capability of doing or
Actually, I wanted to use the sentence below: During May 15-July 17, 1941, DiMaggio held the longest consecutive game hitting streak (56 games). Does that make sense? **It makes more sense because it was during that year, not between it. Thanks!!
which sentence is correct, #2 or #3? SraJMcGin chose #2 & Ms. Sue chose #3. I do not know which one to choose..... HELP!!
How did you get that answer then?
I'm sorry yes. could you tell me what is a non characteristic of region? Please help, thank you.
what is apectral scanning? I really don't have an idea on this. As for the baseline, we indicated a range of 350 nm to 600 nm in the spectrophotometer and found that lambda max is at 510.4 nm. What then is the significance of the baseline?
Based on the experimental data, I was able to calculate the experimental pKa value which is 5.04 and the literature value of the pKa for KHP is 5.51. If I would be computing for the relative error between the two pKa's it would be 8.52994555%. But then,
So, the moisture content (as received) is ((0.5117-0.4998)/0.5117)* 100 = 2.326% and the the moisture content (dry basis) is ((0.1*0.4998)/0.5117)*100 = 9.767% and when the sample is completely dried, it would weigh 0.4998-(0.1*0.4998) = 0.4498 Am I right?
