Friday
August 22, 2014

Posts by jake


Total # Posts: 1,717

AP Chemistry!!!!
For our test in a few days, we heard that there was something for pi and sigma bonds overlapping...can someone explain to me the "hybridizaiton" of where they overlap?? I dont understand it.
November 11, 2008

maths
Find the roots of z^6 + 1 and hence resolve z^6 + 1into read quadratic factors; deduce that cos3x = 4[cos(x) -cos(pi/6)][(cos(x) -cos(pi/2)][(cos(x) -cos(5pi/6)]
November 10, 2008

maths
Find the roots of z^6 + 1 and hence resolve z^6 + 1into read quadratic factors; deduce that cos3x = 4[cos(x) -cos(pi/6)][(cos(x) -cos(pi/2)][(cos(x) -cos(5pi/6)]
November 10, 2008

organic
Explain why glucose undergoes mutarotation
November 8, 2008

Organic
Are any of the following a tertiary amine 2-methyl-2-butanamine N-Methyl-1-butanamine N-Methyl-2-butanamine
November 8, 2008

chemistry
C6H5NO2+? = C6H5N2Cl
November 8, 2008

chemistry
The reaction of sec-butylmagnesium bromide with formaldehyde followed by hydrolysis yields? 2,2-dimethyl-1-pentanol 2-butanol 2-methyl-1-butanol 2-pentanol 2,2-dimethyl-1-propanol
November 8, 2008

chemistry
what is the best combination for preparing CH3CH2CH2CH2OCH3 is CH3CH2CH2CH2OH+NaOCH3 CH3CH2CH2CH2ONa+NaOCH3 CH3CH2CH2CH2Br+NaOCH3 CH3CH2CH2CH2Br+CH3Br
November 8, 2008

organic
which phenol is the most acidic? phenol 2-methyl-6-nitrophenol 3-methyl-5-nitrophenol 2,6-dimethyl-3-nitrophenol 2,4,6-trimethylphenol
November 8, 2008

chemistry
what is the best synthesis of 2-methyl-2-pentene (CH3)2C=CHCH2CH3? 1.(CH3)2CHCH2CH2CH3+F2,heat 2. KOC(CH3)2 1.(CH3)2CHCH2CH2CH3+Cl2,heat2.NaOCH2CH3 1.(CH3)2CHCH2CH2CH3+Br2,heat2.NaOCH3 1.(CH3)2CHCh2CH2CH3+I2,heat2.NaOCH2CH3
November 8, 2008

o chem
Which is not correct? glucose is a reducing sugar glucose has six carbon atoms glucose undergoes mutarotation glucose is a disaccharide glucose is an aldose
November 7, 2008

o chem
a-D-glucose and b-d-glucose can best be described as? -diasteromers -constitutional isomers -different conformations -enantiomers -keto-enol isomers
November 7, 2008

7th grade pre algebra
The Answer is: Chicken Wings
November 6, 2008

math
estimate quotient and divide (how do you estimate the quotient? 552 divided by 71,520 I dont understand the steps.
November 6, 2008

science
why is mitosis important?
November 2, 2008

7th grade algebra
Are you trying to say this disproves the Associative property? because the associative property is only if the operation contains all and ONLY addition signs or all and ONLY multiplication signs. Not if it contains both.
October 17, 2008

Math
Using only addition and subtraction, without changing the order of the digits, and having just three operations, form an equation out of 123456789 that equals 100.
October 14, 2008

Science
What bird is considered a sign of the coming spring?
October 4, 2008

3rd grade art
He is doing a book report. (Old school.) LOL
October 4, 2008

nonfiction
just took test 100 answers are crrect
October 1, 2008

math 7th grade
well if you're trying to find the difference: 20 - (-10) = 20 + 10. So the difference is 30. You can just add it's opposite. Ex. -30 - -20. That = -30 + 20. therefore the answer is -10.
September 22, 2008

science plzzz help
Mass vs. Weight: Although the terms mass and weight are used almost interchangeably, there is a difference between them. Mass is a measure of the quantity of matter, which is constant all over the universe. Weight is proportional to mass but depends on location in the universe...
September 21, 2008

science plzzz help
I'm not entirely sure but I think the main difference is that mass is used in relation to the metric system (metric syst. is used universally in compiling data from scientific findings)and I think weight is used in the customary system. LOL! All I remember is our Chem ...
September 21, 2008

Math
i can't find these patterns. my mom and dad tried to. first problem 64,__,___,___,32 second problems 61,___, ___, ___, 81
September 18, 2008

Algebra
a+6a-9=30
September 17, 2008

Math
How do you solve the following equation x2 - 5x = 14 x2 - 5 x - 14 = 0 (x - 7) (x + 2) = 0 x = 7 or x = -2 How do I explain this to my son who was not taught this way???
September 9, 2008

8th Grade Algebra...HELP!
yes
September 4, 2008

algebra
Is the LCM for xy, y3 = x3y3, y3
September 4, 2008

Science
It is an imaginary line that goes around the center of the earth to separate the northern hemisphere (top) from the southern hemisphere (bottom)
September 4, 2008

chemistry
I would say temperature because increasing temperature would cause molecules speed up and increase volume and decreasing temperature usually decreases molecular speed and causes volume to decrease (except for water)
September 4, 2008

Chemistry/hydrolysis of ATP
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. Explain the chemical process that occurred in ...
August 28, 2008

Men's Health
I was wondering if someone know's aof a web-site that may be able to help me I have to look up the following and explian them also benefits and risks of them thanks ( Basically what effects good/bad have on Men's health) Epimedium Leaf Chinese Dodder Seed Ginseg ...
August 7, 2008

ORGANIC CHEMISTRY
by x in the first one did you mean OH
July 27, 2008

ORGANIC CHEMISTRY
WHAT IS THE BEST COMBINATION OF REACTANTS FOR CH3CH2CH2CH2OCH3
July 27, 2008

ORGANIC CHEMISTRY
WHICH ONE OF THE FOLLOWING ALKYL HALIDES GIVES THE HIGHEST RATIO OF SUBSTITUTION TO ELIMINATION ON TREATMENT WITH SODUM ETHOXIDE IN ETHANOL 1-BROMOPENTANE 2-BROMOPENTANE 3-BROMOPENTANE 1-BROMO-2-METHYLBUTANE 2-BROMO-2-METHYLBUTANE
July 27, 2008

organic chemistry
How many stereogenic carbon atoms does the alkaloid morphine have?
July 26, 2008

o chemistry
are the Cl, CH3, and H on opposite sides or on the same sides
July 26, 2008

o chemistry
What is the newman projection of meso-2,3-dichlorobutane?
July 26, 2008

o chem
chlorination of nitrobenzene under conditions of electrophilic aromatic substitution occurs? a. Faster than chlorination of benzene and gives a mixture containing mostly o- and p-chloronitrobenzene. b. faster than chlorination benzene and gives mostly m-chloronitrobenzene. c. ...
July 19, 2008

history
The Christian Church helped preserve what traditions in the German kingdoms.
July 14, 2008

arithmetic
1/2
June 24, 2008

physics
15g iron (c=450 J/kg K) bolt is heated from 21 C to 312 C. It is then plunged into a 2kg of 15 C water (c= 4180 J/kg K) into a 4.6kg alum. tub (c=903 J/kg K) What is the final temp. (Tf) of the water and the tub? for some reason..., i got 0.472 C for final temp of tub and -14....
June 10, 2008

arithmetic
Actually he could earn $2141+ if he put the money in the the bank for 5 years and he would have immediate access to it if he needed it.
June 9, 2008

Chemistry
A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg2Cl2...
May 28, 2008

algebra
two records and three tapes cost $31.three records and two tapes cost $29.find the total cost of each record and each tape
May 26, 2008

history
Who is roberto clemente?
May 23, 2008

math
Find the area between each curve and the x axis for the given interval. y=16x-x^3 from x = 0 to x = 4 Thanks ahead of time.
May 14, 2008

Statistics
.0069
May 14, 2008

Electronics/Circuits
Just a simple one... which symbol should I use to represent a strain gauge on circuit diagram? Thanks
May 11, 2008

Algebra 2
5/2(x-1), 1/2x, 3/2(x-1)^2=?
April 30, 2008

MATH
the class president plans to randomly select a committee of three people from three boys and five girls. How many committees are possible?
April 16, 2008

math/trigonometry
solve secx/2=cosx/2 over the interval[0,2pi) without using a calculator
April 14, 2008

Physics
Does the uncertainty principle tell us that we can never know anything for certain?
April 2, 2008

Physics
We don't notice the wavelength of moving matter in our common experience. Is this because the wavelength is extraordinarily large or extraordinarily small?
April 2, 2008

Physics
If a cannonball and a BB have the same speed, which has the longer wavelength?
April 2, 2008

Physics
If you shine an ultraviolet light on the metal ball of a negatively charged electroscope, it will discharge. But if the electroscope is positivelely charged, it won't discharge. Why?
April 2, 2008

music
what is soldja boys tone or rythym :)
April 1, 2008

history
President Taft's secretary of the interior, Richard A. Ballinger, disapproved of conservationist controls of western lands? true or false if false then what.
March 25, 2008

history
Who did The republican party run for president during the 1912 elections? Democratic Party? Socialist Party?
March 25, 2008

history
Who did the Progressive Party run for president in the 1912 election?
March 25, 2008

math
How do I do the LCM?
March 23, 2008

Math(Easy Survey Please Help)
I need 75 of these surveys filled out to do a regression analysis for Economics. Just answer the 10 easy questions for me please. 1. Do you exercise or work out on a regular basis? 2. Are you male or female? 3. Do you smoke? 4. How many carbonated soft drinks do you consume in...
March 22, 2008

AP Chemistry
i'm having trouble balancing the redox reaction for the iodine clock lab. The redox reaction inovlves a hydrogen sulfite ion and iodate ion in an acidified solution. i have the final balanced equation, 5 HSO3 + 2 IO3 ---> I2 + 5SO4 + H20 + 3H but i'm having trouble ...
March 13, 2008

kinda easy geometry
I know this geometry question may be simple for some of you but it is hard for me. I use to be able to do this type of problem but I guess I forgot it over time. Im sure we all do. Any help on this question would help. Thanks in advance for whoever helps me. :-) A line passes ...
March 9, 2008

bio II
The molecule that provides energy for active transport is?
March 5, 2008

science
A + B -----> C is an example of a A) double-displacement reaction B) synthesis reaction C) single-displacement reaction D) redox reaction E) decomposition reaction
March 5, 2008

social science
Can someone give me like a short five sentence paragraph on What was the Renaissance? I am just having a hard time grasping onto that concept. Just a brief description would help me understand it a lot easier. thanks in advance to whoever can help me :-)
March 4, 2008

Physics
Thanks. :)
March 4, 2008

Physics
A 66.0 kg diver is on a diving board, which is 1.10 m above the water. He falls at a speed of 9.10 m/s. Calculate his kinetic energy as he hits the water. I know KE is 1/2mv^2, but how can I find KE when height is involved?
March 4, 2008

social studies
why did the great wall lose its importance after Wu Di's reign
March 4, 2008

science
what can you use to decide whether liquids tested are polar or nonpolar?
March 3, 2008

science
what basis can you use to decide whether liquids tested are polar or nonpolar?
March 3, 2008

science
A substance in a solid at room temperature. It is unable to conduct electricity as a solid but can conduct electricity as a liquid. This compound melts at 755 degrees celsius. Would you expect this compound to have ionic bonds, metallic bonds, or covalent bonds? A) metallic ...
February 28, 2008

science
below are about 21 questions from my final study guide. I was given a 563 question study guide for my final and obviously I did not understand every question. So basically I did not understand 4% of the questions which is pretty good. Just any help with the questions below ...
February 28, 2008

science
This is a science question so be prepared. lol How many orbitals does hydrogen (H) have? 1 or 2 or 3 How many orbitals does oxygen (O) have? 1 or 2 or 3
February 25, 2008

science
I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only 7 problems I need ...
February 25, 2008

science
I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only 7 problems I need ...
February 25, 2008

long physics E&M
i have the same problem.
February 19, 2008

Maps
I need to find a map where I can highlight countries on it. It has to have Switzerland, Europe, and The United States included on it.
February 12, 2008

physcial science
a 50 kg crate is lifted to a height of 10 meters. a. how much potential energy does the crate have after being lifted? b. if it took 5 seconds to lift the crate, using a machine what was the power rating of the machine?
February 11, 2008

physical science
a car of mass 900 kg move at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?
February 11, 2008

physical science
this is the question in the book, i dont understand either
February 11, 2008

physical science
find the net force produced by a 40 Newton force and a 50 Newton force in each of the following cases: Both forces act in the same direction both forces act in opposite directions.
February 11, 2008

physical science
Thats all the information i have
February 11, 2008

Psychology
When was the California Psychological Inventory created?
February 8, 2008

Psychology
Where was the Rorschach ink blot test created? I know it was created by a Swiss psychologist Hermann Rorschach but where?
February 8, 2008

Math
To gather enough nectar to make 1 pound of honey, a bee must visit 2 million flowers. How many flowers must a bee visit to make 64 ounces of honey?
February 7, 2008

AP Chemistry
Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) ----> CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 a)find g H in hydrocarbon 1....
February 5, 2008

Chemistry
this helped so much! thank you, i understand now.
February 4, 2008

Chemistry
Sorry I have one other question that i'm unsure about. for the solution process of A (s)----> A (aq) the teacher demonstrates upon mixing A in H2O that the temp falls from 22 to 5 degrees C. The soluability of this solid is known to be 28g/100g H2O at 30 degrees C. If ...
February 4, 2008

Chemistry
thank you
February 4, 2008

Chemistry
If the partial pressure of CO2 is 2.87 atm the soluability in H2O is known to be 4.68 M. What would be the soluability of CO2 in H2O if the partial pressure is increased to 7.60 atm? Assume the temp is held constant. would it work to set up a proportion for this question? if ...
February 4, 2008

Chemistry
The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg) help, how do i solve this...
February 4, 2008

Literature
In Lord Of The Flies, Jack leaves part of what they kill for the beast. What does this remind you of, in general?
February 1, 2008

CHEMISTRY
that couldn't be right though because i only started out with .953 g and conservation of mass applies
January 30, 2008

CHEMISTRY
so the second equation would be: 0.635X + 0.526(0.953-X)=0.944 ????? 0.635X + 0.5013-.526X=0.944 0.109X/.109=0.4427/.109 x=4.061???? to three sig figs=4.06 is that the grams of BaCrO4???
January 30, 2008

CHEMISTRY
Yes, I didn't want to use a second variable because my teacher wants us to use different approaches. i checked the molar mass of AgNo3 and it is 169.87, so thank you. I didn't notice that. the new factor would be: 107.87/169.87 = .635 i'm not quite sure how to ...
January 30, 2008

CHEMISTRY
sorry, it would probably hep you to know that the objective is to calculate the percentage of silver and barium in the nitrate salt mixture. i know how to find the percentage once i get the grams, but i have no idea how to get the grams from this point. thanks :]
January 30, 2008

CHEMISTRY
I'm in the same class as Catie, and we're working on the same lab; however, i chose a different approach. here's what i have below, your help is much appreciated. so i have X= g AgNO3 0.953-x = Ba(NO3)2 therefore .953-X-NO3=? so far I caluclated the % of Ag and Ba ...
January 30, 2008

English
What are some images Robert Browning is trying to make us see in "A Woman's Lat Word" and "Rabbi Ben Ezra"? Is there a site where I can read an analysis of these two poems?
January 30, 2008

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