Monday
April 21, 2014

Search: chem experiment:

Number of results: 17,656

chem
My question below was asking about the experiment that you are doing. The handout is obviously about this experiment. If we do not know the experiment, how are we going to answer these questions?
Sunday, July 27, 2008 at 12:53pm by ~christina~

chem
experimental error is part of any experiment.suggest two possible sources of error on the experiment of the mole ratio of NaCL to that of NaHCO3.
Wednesday, February 29, 2012 at 2:15pm by audu

chem lab
I don't know the experiment you are doing but it's probably a titration experiment. The indicator turning pink (assume the indicator was phenolphthalein) means there was base in the flask at the beginning.
Monday, April 7, 2008 at 11:23pm by DrBob222

chem.
Why don't you try copying the problem exactly as it appears in your worksheet/notes/homework? If it is an experiment, explain in detail what the experiment is about and the procedure. Perhaps the trouble comes from trying to restate the problem in your own words.
Saturday, March 19, 2011 at 3:20pm by DrBob222

CHEM
I think an appropriate comment is that the effective nuclear charge is nothing more than a semi-empirical concept and empirical concepts actually don't explain anything. They are there and they work and they are based on experiment but by experiment we know where the electron ...
Wednesday, December 10, 2008 at 4:51pm by DrBob222

Gr.12 Chem - PLEASE CHECK MY ANSWER
This is a great opportunity for you to experiment. The slime I have seen made usually becomes harder with more kneading; therefore, I would try more water as a separate experiment.
Wednesday, May 28, 2008 at 2:40pm by DrBob222

physics/chem
n Fig. 21-41, three identical conducting spheres initially have the following charges: sphere A, 7Q; sphere B, -8Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two experiments are conducted. In ...
Monday, March 31, 2008 at 1:28am by dave

physics
does anyone know who conducted the experiment or a credible description of the experiment that helped prove Einstein's thought experiment: the twin paradox? as in the experiment in which one cesium-beam atomic clock stays on Earth, while another one takes flight and the time ...
Sunday, January 10, 2010 at 12:47pm by frank

chem
I have no idea what experiment 4 is nor what role the benzoic acid played in the experiment. However, g benzoic acid in the 20.5 mL is M x L x molar mass = grams. 5.256M x 0.0205 L x 122.12 = ?grams.
Monday, February 4, 2013 at 12:41am by DrBob222

Chem
2ClO2 + 2OH- --> ClO2- + H2O Experiment 1, M of [ClO2] = .060 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .0248 Experiment 2, M of [ClO2] = .020 M of [OH-] = .030 Rate of disappearance of ClO2 (M/s) = .00276 Experiment 3, M of [ClO2] = .020 M of [OH-] = .090 ...
Sunday, February 10, 2008 at 11:53pm by Anonymous

chem
An optical rotation study gives a result of alpha=+140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, and not -220 degrees. -could polarimetry experiment be used to find the r and s isomer?
Tuesday, November 18, 2008 at 12:49pm by Jason

AP Chem
i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of gases Experiment: stick cotton ends of a Q-tip (one soaked in HCl and one in NH3) into either end of a drinking straw and measure where precipitate is
Tuesday, December 11, 2007 at 7:03pm by Blair

Physics
A very important experiment was carried out at the end of the 1800ís involving testing for the speed of the earth through the ether. (a) State the name of this experiment (b) Describe why the light beams are perpendicular to each other at one stage of the experiment. (c) What...
Monday, August 31, 2009 at 6:00am by Alfred

chem
We have no idea which experiment you are doing and how you are doing it.
Wednesday, September 29, 2010 at 12:03am by DrBob222

chem
What's the experiment? What's the reaction? What complex?
Wednesday, November 16, 2011 at 3:09am by DrBob222

Chem
It would depend on the experiment
Wednesday, February 5, 2014 at 8:49pm by bobpursley

chemistry
You need to tell me more about the experiment. Perhaps another volunteer has some experience with an experiment of this type and can chime in. What did you do with the data? What was the purpose of the experiment?
Sunday, September 27, 2009 at 9:03pm by DrBob222

Chem
If the superscripts are as you have them, then take any experiment and write the rate expression. For example, experiment #1, rate = x = k(O3)^1(NO)^1 Plug in 0.002 for (O3) and 0.001 for (NO) and solve for k. You must solve for k in terms of x if you don't have a value of x ...
Monday, February 18, 2008 at 7:06pm by DrBob222

chem
Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'? A. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give the "corrected volume". B. A blank is composed of the...
Friday, August 15, 2008 at 6:25pm by Anonymous

chem
It would be nice to know what experiment you are discussing.
Sunday, November 14, 2010 at 6:25pm by DrBob222

biology
my quations are without changing appratus in an experiment how can the reliability of the experiment result be improved and also why can small changes in room temperature during the experiment be ignored thank you!!
Wednesday, October 29, 2008 at 4:38pm by lila

chem
If 20.5 mL of a 5.256 M solution of benzoic acid is used in an experiment similar to experiment 4, how many grams of benzoic acid is in the starting solution? (molar mass of benzoic acid = 122.12 g/mol) Be sure to pay attention to significant figures. The answers are all in ...
Monday, February 4, 2013 at 12:41am by alice

chem
Would you mind sharing the secret of what you're doing? What experiment are you conducting? How are you doing it?
Saturday, October 16, 2010 at 3:33pm by DrBob222

ap chem
What type of experiment can be done to determine if a material is paramagnetic?
Wednesday, January 2, 2013 at 10:41am by mary

chem
It's difficult to answer without knowing the details of the experiment.
Sunday, March 2, 2014 at 7:00pm by DrBob222

Science
1. The ? is the part of an experiment that is not being tested and is used for comparison. (7 words) 2. The ? describes the steps you use during an experiment. (9 words) 3. After an experiment, scientists write a ? which summarizes their experiment and results. (10 words) 4. ...
Tuesday, August 26, 2008 at 8:20pm by Happyface

Science
Here is my answer for the first one I set up a controlled experiment by getting all matirals that I need for my experiment and then using the scientific method to do my experiment. Im working on the others
Sunday, November 6, 2011 at 7:51pm by Laruen

Chemistry
Did you not do the experiment? How did you set up the experiment? What did you learn from the experiment?
Wednesday, September 12, 2012 at 3:25am by DrBob222

chem
Is this an experiment you have done? Is the H really H^+? Are that any concentrations or partial pressure given?
Sunday, November 16, 2008 at 11:01pm by DrBob222

Chem
We need to to AT LEAST two things. What is EW? What experiment did you do and the procedure?
Monday, March 15, 2010 at 6:46pm by DrBob222

Chem Will somebody Please help me
There isn't enough information posted to know how you conducted the experiment.
Wednesday, February 20, 2013 at 10:34pm by DrBob222

chem experiment:
You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hessí Law: is the algebraic addition of chemical equations yields a net equation whose enthalpy of reaction is the ...
Thursday, May 17, 2007 at 11:23am by rob

Science organic chem
Yea, I'm talking about the experiment Nino said.
Tuesday, April 27, 2010 at 3:07pm by Dana

psychology
When an experimenter's expectations about a behavior influence the results of his experiment, it is called a a.placebo effect b.self-fulfilling prophecy c.single-blind experiment d.double-blind experiment
Monday, April 7, 2014 at 9:40pm by Indigo

Science Fair
Yes, I figured that out, but it has to be some sort of experiment. And adding up the calories and fat grams isn't really an experiment. So, is there any way I can form this into an experiment? I was hoping somebody would have an idea on that. And Thanks! Yes I do know what I ...
Friday, November 9, 2007 at 4:04pm by Truffles

Org. Chem.
this is a problem from an experiment we did not perform, but have to answer... that is why I do not know what values to use for the division?
Tuesday, September 22, 2009 at 12:06am by CM

chem 101
We don't know what experiment you are performing? My crystal ball is cloudy today and I can't even guess what you are doing.
Wednesday, September 29, 2010 at 11:40am by DrBob222

chem
how does the tepmperature , pressure and mole parameter explain the suddden collapse of the can in imploding the can experiment?
Sunday, October 28, 2012 at 10:13am by Lala08

chem
You must explain the problem since we don't now what experiment you are doing. Note the correct spelling of celsius.
Wednesday, March 30, 2011 at 11:06pm by DrBob222

chemistry
hey thanks for the help. well exactly the main point of my question was that I'm doing a experiment in titration and my topic is to determine the percentage of iron in steel wool but i couldn't get procedures on how to carry out the experiment. But if you have other ways to ...
Monday, May 17, 2010 at 6:20am by piah

Gen Chem II
You conduct another experiment on silver condensation. You add 8.0 g of silver nitrate to 200 mL of pure water. You attach a single 850 mAh AAA battery (at 1.3 V) to the electrochemical cell. You can assume that the entire battery charge is useable for electroplating. You get ...
Monday, November 18, 2013 at 10:25pm by kyle

Science organic chem
You need to tell us specifically what experiment you are talking about and the equilibrium you have.
Tuesday, April 27, 2010 at 3:07pm by DrBob222

Chem
When conducting an experiment on determining density, what would the variable be? not the mass or temperature...can't figure it out. Thanks -MC
Wednesday, February 5, 2014 at 8:49pm by mysterychicken

Chemistry
I don't see anything wrong with your calculations, although I don't know exactly how the experiment was to be conducted. It would appear to me that since your teacher gave you a made up experiment with numbers that s/he gave you bad data OR the numbers were made up wrong on ...
Wednesday, July 28, 2010 at 1:39pm by DrBob222

chem.
I really don't understanf how jameschadwick discovered the neutron. iread websites and read the 18 pg. article but what was his experiment?
Sunday, December 12, 2010 at 5:06pm by tj

chem
(5) The equivalent weight of the KMnO4 is 158.034/5 = about 31. I can't help you with the others because you didn't include all of the informatin from the experiment.
Thursday, October 27, 2011 at 9:43pm by DrBob222

science
i had to make up an experiment for school. but my teacher said it wasn't an experiment. my hypothesis is that there is a relationship between divorce rates and teens school grades. how do i make this into an experiment. please help!
Wednesday, May 18, 2011 at 5:46pm by Todd L

CHEM 1LB
Which of the following safety precautions is unnecessary for the 'Mass Percent of ASA' experiment? A. Safety goggles should be worn. B. Do not ingest the aspirin used in this experiment as it may be contaminated with other chemicals. C. The FeCl3solution is acidic and ...
Friday, January 21, 2011 at 5:48pm by Shawn Tabrizi

Chem Help!!!!
In an experiment, 0.771g Cr(s)reacts completely with 0.712g O2 to form a single solid compound. Write a balanced equation
Monday, February 25, 2013 at 1:22pm by Lisa

Chemistry
I am getting stuck on this problem. I got x=1 and y=1 when I used experiment 2/1 and then experiment 3/2. However I am unsure what to do next. The formula I'm using is Rate=K(NO)^x(Cl2)^y is this correct? I am getting 37.77 as an answer when I plug in values into experiment 2...
Monday, July 30, 2012 at 1:57pm by Anonymous

chem.
determine the quantity of NaOH whose concentration is 15% w/v to neutralize 176g H2SO4 , this is the exact problem and no its not an experiment. sorry to bother someone of you
Saturday, March 19, 2011 at 4:10pm by auro

Gen Chem
epsom salts, household ammonia, and rubbing alcohol are also consumer chemicals that could be used in this experiment. what are the chemical formulas for these substances?
Monday, October 22, 2012 at 7:27pm by Andrea

Mat/116
An experiment is underway to test the effect of extreme temperatures on a newly developed liquid. Two hours into the experiment the temperature of the liquid measured to be -17 degrees celsius. After eight hours of the experiment the temperature of the liquid is -47 degrees ...
Sunday, February 23, 2014 at 10:56am by Carla

CHEM HELP
i did an experiment useing 2.5 grams of nahco3 and we got 1.60 grams of nacl
Tuesday, January 2, 2007 at 6:26pm by karyn

science experiment (bouncing egg)
From what I've read, (I've not performed an experiment on one), coke contains acids (citric, phosphoric, carbonic, etc) and these dissolve an egg shell just as vinegar does. So coke can make an egg bounce. You may want to post the details of your experiment.
Sunday, September 18, 2011 at 4:59pm by DrBob222

chem expirement!
You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hessí Law: is the algebraic addition of chemical equations yields a net equation whose enthalpy of reaction is the ...
Thursday, May 17, 2007 at 12:28pm by rob

mat/116
need an expression only to this word problem: An experiment is underway to test the extreme effect of a newly developed liquid. Two hours into the experiment the temperature if the liquid measured to be -17 degrees Celsius. After eight hours of h experiment the temperature of ...
Sunday, February 23, 2014 at 6:24pm by csrla

Chem.
2KClO3 (s) ---> 2KCl (s) + 3O2 (g) For every mole of KClO3 that decomposes in the above experiment, how many grams of oxygen gas are produced? A.) 3 B.) 16 C.) 48
Saturday, September 29, 2012 at 9:52pm by Anonymous

Chem.
Both of these questions must refer to an experiment you have done or are doing. Not enough information is given to answer the questions.
Monday, November 2, 2009 at 10:37pm by DrBob222

Chem
In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39 c. What pressure does the gas exert if it is assumed to be ideal?
Wednesday, June 29, 2011 at 9:17am by Chris

Biology
hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind affects body ...
Friday, November 9, 2012 at 8:50am by Cara

Science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable. Is...
Wednesday, September 11, 2013 at 7:03pm by Anonymous

science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable. Is...
Wednesday, September 11, 2013 at 10:21pm by Anonymous

Science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable. Is...
Thursday, September 12, 2013 at 9:45am by Anonymous

science
If an experiment disproves a scientist's hypothesis, what should the scientist do next? 1. Develop a testable question. 2. Revise the hypothesis and try the experiment again. 3. Develop a theory based on the data gathered in the experiment. 4. Change the dependent variable. Is...
Thursday, September 12, 2013 at 12:06pm by Anonymous

Chem
I did an experiment for creating an ester. So basically I added an acid to an alcohol. We were to also add H2SO4 solution. Why did we add that?
Wednesday, March 25, 2009 at 11:28pm by Lena

chem
In an experiment 4.0 g of ferrous ammonium sulphate, FeSO4.(NH4)2SO4.6H2O, is used. Since the oxalate in in excess, calculate the theoretical yield of the iron complex?
Wednesday, November 16, 2011 at 3:09am by Anonymous

Physics
I have an experiment in which I drop a tennis ball ,, and measure its rebound height in every bounce. one of the question regarding this experiment is - were the collisions elastic or not ? support with evidence. How do these forces magnitude compare with the weight of the ...
Sunday, July 31, 2011 at 11:53am by AfterLife

chem-calorimetry
I don't know enough about your experiment to answer. Are you using a bomb calorimeter of constant volume? A syrofoam cup calorimeter?
Monday, March 31, 2008 at 10:26pm by DrBob222

chem
(5) In this experiment MnO4-is reduced to Mn 2+ by the unknown. What is the equivalent weight of MnO4- for this experiment? 52.68 (6) How many equivalents of electrons were transferred from the unknown solution? (7) What is the Normality of the 1.00 mL of the unknown solution...
Thursday, October 27, 2011 at 9:43pm by bry

Chemistry
In the experiment of Nucleophilic substitution reactions: Competing Nucleophiles 1)what would happen if all the solids in the nucleophile medium were not dissolved? How might this affect the outcome of the experiment? 2)Explain the order of elution you observed while ...
Tuesday, February 16, 2010 at 8:50pm by Jennifer

Chem
O3 + NO --> O2 + NO2 Write the rate law equation for the reaction. Explain how you obtained your answer. Experiment 1: [O3] .0010 [NO] .0010 Rate of formation of NO2 x Experiment 2: [O3] .0010 [NO] .0020 Rate of formation of NO2 2x Experiment 3: [O3] .0020 [NO] .0010 Rate ...
Monday, February 18, 2008 at 7:06pm by Anonymous

chem
You need to looke these up in a table. I assume you have a lab manual or an experiment from which these questions come. There should be a table associated with it.
Sunday, May 4, 2008 at 6:24pm by DrBob222

general chem
Please help me with this questions. Three hypotheses regarding the interaction of the oil, sugar and salt with water. What experiment(s) will you do to test hypotheses?
Monday, September 1, 2008 at 6:49pm by Anonymous

chem
Given that the density of the supplied vinegar solution in this experiment is 1.025 g/mL, calculate the % acetic acid found in the vinegar sample.
Tuesday, April 15, 2014 at 8:45am by john

org. chem
why is it easier to remove excess acetic acid from the products than excess isopentyl alcohol? from the products of what? Did you perform an experiment in class and this is one of the lab questions? If so you will need to explain what you did in some detail; otherwise, we're ...
Wednesday, March 7, 2007 at 7:36pm by Richard

chem
write the net ionic equation for the unknown titration reaction in this experiment. KHC8H4O4(aq) + NaOH(aq)----> KNaC8H4O4 + H2O(l)
Monday, April 7, 2008 at 11:18pm by natash

Science organic chem
she is talking about conversion of benzaldehyde to benzilic acid. in a second part of the experiment where you convert benzoin to benzil, during the reflux, red gas is evolving
Tuesday, April 27, 2010 at 3:07pm by Nino

egg protection device
Hi. I need to know how to make an egg protection device out of straws and duct tape. Thanks. Experiment! Experiment! Experiment!
Saturday, January 13, 2007 at 7:48pm by Anonymous

gen chem 2
In the chemical kinetics experiment, determine the dilution of the stock bleach solution. The bleach used will be around 5.5% (weight/volume). Convert this to molarity
Tuesday, February 8, 2011 at 6:59pm by jen

chem
After obtaining a greenish color in an experiment what does this tellyou about the relative concentrations of H^+ and OH^- in the solution? pls help i really need a simople explanations about this.
Monday, December 3, 2012 at 1:51am by akira 12

3rd grade
Please make your question clearer. Are you doing the experiment? What experiment is it?
Saturday, March 13, 2010 at 10:39am by GuruBlue

chemistry
An experiment is considered a controlled experiment if it contains tests with chemicals.
Wednesday, April 6, 2011 at 5:19pm by Ashley Jones

psychology
What implications do the results of an experiment have for subjects that were not observed in the experiment?
Monday, March 4, 2013 at 12:17am by jenna

8th grade science
After an experiment scientists write a . which summarizes their experiment and results?
Wednesday, September 2, 2009 at 11:36pm by Anonymous

science - controlled experiment
an experiment that has followed all of the safety rules and is not out of control
Wednesday, December 13, 2006 at 6:29am by lexy

Chemistry
What reaction or experiment was performed? I have no idea. Is this a question about a lab experiment you were supposed to do?
Monday, June 13, 2011 at 6:39pm by drwls

science
It would help if you proofread your questions before you posted them. All can be involved in an experiment, but none of them "is an experiment."
Thursday, September 22, 2011 at 7:34pm by PsyDAG

physics
I would experiment on this. Take two cans of cola, freeze one, then try the experiment.
Saturday, March 3, 2012 at 4:04pm by bobpursley

psychology
D, double blind experiment. This is why you need both the experimenter and experiment to be unaware of the situations outcome.
Monday, April 7, 2014 at 9:40pm by playax0902

chemistry
In one experiment, the reaction of 1.00 g mercury and an excess of sulfur yielded 1.16 g of a sulfide of mercury as the sole product. In a second experiment, the same sulfide was produced in the reaction of 1.52g mercury and 1.02g sulfur. a) What mass of the sulfide of mercury...
Saturday, September 20, 2008 at 1:12am by lisa

Chemistry
Which experiment? My crystal ball is cloudy; I can't predict what experiment you are doing.
Saturday, September 28, 2013 at 10:03pm by DrBob222

Science
What is the difference between a controlled experiment and a natural experiment?
Tuesday, December 31, 2013 at 1:18pm by Smiley

Chemistry
student did the Synthesis of Salicylic Acid experiment using 3.93 g of methyl salicylate. This was the limiting reagent for his experiment. What is the theoretical yield of salicylic acid for his experiment? The theoretical yield is:
Tuesday, November 16, 2010 at 3:17pm by Lena

Science
sunlight is fine, that's what they used in the experiment that I saw. I did something more complicated with this but in another experiment with spinach circles.
Friday, April 4, 2008 at 10:11pm by ~christina~

psychology
What was the first experiment in which B.F. skinner tested the theory of operant conditioning? Details on the experiment? Any help would be appreciated. =)
Sunday, October 5, 2008 at 8:52pm by alexa

biology
an experiment with only two products used which are yest and sugar what are the outcomes? the procedure to conduct this experiment?
Wednesday, October 20, 2010 at 2:47pm by help needed

psychology
The task is to redesign Milgram's experiment so no one is hurt, physically or emotionally. However, from my understanding, the experiment is designed to test how far subjects will obey an authority figure even if it means inflicting pain on another. To inform the subject, in ...
Saturday, December 10, 2011 at 12:53am by Amanda

Statistics
2. (TCO 5) A company produces electronic equipments claims that 98% of their products never need any kind of maintenance. We selected 10 of their products and we wanted to know the probability that 8 of them never need maintenance. Choose the best answer of the following: (...
Friday, March 1, 2013 at 9:57pm by JAR

Chem
In the |Molecular Geometry Lab 1. List three ways in which models used in this experiment are inaccurate representations of orbitals? 2.explain why the ClF3 molecule is not a trigonal planar molecule?
Tuesday, November 2, 2010 at 12:17pm by Leon

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>

Search
Members