Sunday

April 20, 2014

April 20, 2014

Total # Posts: 1,682

**o chemistry**

are the Cl, CH3, and H on opposite sides or on the same sides

**o chemistry**

What is the newman projection of meso-2,3-dichlorobutane?

**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. ...

**history**

The Christian Church helped preserve what traditions in the German kingdoms.

**arithmetic**

1/2

**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....

**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.

**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...

**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

**history**

Who is roberto clemente?

**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.

**Statistics**

.0069

**Electronics/Circuits**

Just a simple one... which symbol should I use to represent a strain gauge on circuit diagram? Thanks

**Algebra 2**

5/2(x-1), 1/2x, 3/2(x-1)^2=?

**MATH**

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

**math/trigonometry**

solve secx/2=cosx/2 over the interval[0,2pi) without using a calculator

**Physics**

Does the uncertainty principle tell us that we can never know anything for certain?

**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?

**Physics**

If a cannonball and a BB have the same speed, which has the longer wavelength?

**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?

**music**

what is soldja boys tone or rythym :)

**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.

**history**

Who did The republican party run for president during the 1912 elections? Democratic Party? Socialist Party?

**history**

Who did the Progressive Party run for president in the 1912 election?

**math**

How do I do the LCM?

**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...

**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 ...

**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 ...

**bio II**

The molecule that provides energy for active transport is?

**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

**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 :-)

**Physics**

Thanks. :)

**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?

**social studies**

why did the great wall lose its importance after Wu Di's reign

**science**

what can you use to decide whether liquids tested are polar or nonpolar?

**science**

what basis can you use to decide whether liquids tested are polar or nonpolar?

**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 bo...

**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 wou...

**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

**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 he...

**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 he...

**long physics E&M**

i have the same problem.

**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.

**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?

**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?

**physical science**

this is the question in the book, i dont understand either

**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.

**physical science**

Thats all the information i have

**Psychology**

When was the California Psychological Inventory created?

**Psychology**

Where was the Rorschach ink blot test created? I know it was created by a Swiss psychologist Hermann Rorschach but where?

**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?

**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....

**Chemistry**

this helped so much! thank you, i understand now.

**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 t...

**Chemistry**

thank you

**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 n...

**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...

**Literature**

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

**CHEMISTRY**

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

**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???

**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 remo...

**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 :]

**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 ...

**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?

**AP CHEMISTRY**

The unit cells for most alkali metal halides are face-entered for both the cations and anions. In the case of NaCl the sodium ion is just a little too large for the chloride ions to touch each other along the face diagonal. The unit cell edge length is 564.0 pm. The sodium ion...

**science**

for what?

**Biology**

thanks

**Biology**

I know that the phosphate [cells] and sodium barcarbonate [blood plasma] buffer systems are two examples of biological buffers; however, i am writing an essay for bio and i need a third example. does anyone know of a third biological buffer system?

**Science**

Why is is it important to place your arm in a horizontal position rather than letting it hang down at your side when you take your blood pressure? Does everyone's heart create the same pressure? Why or why not?

**Science**

A fish is homozygous dominant for bug eyes and his mate is heterozygous. show the possible offspring. i have BB BB Bb and Bb for the possible offspring, but how do I express this phenotypic ratio? would 4:0 correct?

**Chemistry**

If I have to make a solution with sodium bicarbonate (baking soda) how do i find the molarity and how do i correctly make the solution??? i.e. how do i prepare a solution of sodium bicarbonate with a molarity of 0.01?

**math**

Damon I really dont understand please one hint.mt mom does not understand either

**math**

One number in each group does not fit 66,90,32,45,300 Pattern? 99,981,459,89,729 Pattern? 128,244,556,788,762 Pattern

**math**

12,18,15,21,18,24,21,27,24,30,27,34 13,26,18,36,23,36,28,41,33,46,38,51 44,54,47,57,50,60,63,73,66,76,69,79,72, 15,14,15,24,25,34,35,44,45,54,55

**math**

complete the pattern 12,18,15,21,18,?,?,?,?,?,?, 13,26,18,36,23,?,?,?,?,?,?,?, 44,54,47,57,50,?,?,?,?,?,?,?, 5,14,15,24,25,?,?,?,?,?,?,?,?

**Math**

How do i find the equation of a parabola in the form ax^2+bx+c?

**AP CHEM**

An ice cube tray contains enough water at 22.0 C to make 18 ice cubes that each have a mass of 30.0g. The tray is placed in a freezer that uses CF2CL2 as a refridgerant. The heat of vap of CF2CL2 is 158 J/g. What mass of CF@CL2 must be vaporized in the refridgeration cycle to ...

**AP Chemistry**

Thank you!

**AP Chemistry**

I was wondering if anyone could possible help me with this homework question? The normal boiling point for acetone is 56.5 degrees C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. What would be the boiling point of acetone (deltahvap = 32.0 kJ/mol) at this ...

**What is discrete math? And is it relatively easy?**

I ask because my TA recommended taking it next semester along with calc 3. My major is electrical engineering, and I might throw actuarial science into the mix too. So yeah, lots of math.

**French**

thats right

**Math**

why does the president put vegtables in his blender?

**physics**

i dont get it

**How do you use the substitution method in math?**

Example: 2y + x = 3 (1) 4y – 3x = 1 (2) Equation 1 looks like it would be easy to solve for x, so we take it and isolate x: 2y + x = 3 x = 3 – 2y (3) Now we can use this result and substitute 3 - 2y in for x in equation 2: Now that we have y, we still need to substit...

**Biology**

they have exoskeletons?

**English (Classical Myths)**

I have a myth project assigned. I got lucky (or so I thought) and had the myth of Polyphemus. Wikipedia has it if anyone doesnt know it. There are three things that I need for my project: 1) The moral of the story. 2) How the story explains natural phenomenon. 3) How the myth ...

**biology - requirements of diffusion?**

Im pretty sure its D because I think both A and C are needed and B sounds logical.

**Math**

oh lol, first I looked at this question and I was like wow, this is impossible to do because I thought you were asking for the COMMON factor for all of those... in the case of factors of each individual #... it should take you less than 5 minutes to do them... so you have plen...

**math**

please help! find 3 consective numbers with a sum of 12. find three consective numbers with a sum of 45

**College Algebra ~ Please Help**

Anything related to projectile is related to quadratic. Examples can range from shooting a bullet like the example above to a simple action such as throwing a baseball upward. You can use quadratic to figure out what is the maximum height your ball will goes up to, what's ...

**biology**

umm... aren't they both contain DNA and DNA is made out of nitrogenous base and phosphate backbone? So I would say nitrogen and phosphorous.

**Algebra/Trigonometry**

huh? what is this? lol... 1/y-1/y = 0... then -3 = -3 duh?

**Chemistry**

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

**Chemistry**

Not 100% sure, but I say it's D. I think there are only 4 orbitals: s(2), p(6), d(10), f(18).

**Biology**

In glycolysis, Acetyl-CoA is recycled so it can be used again for another cycle or elsewhere for biosynthesis.

**science**

Efficiency can never reach 100% because there's always loss of energy during the process of carrying out work. One example is energy loss because they're converted into heat while operating.

**math**

Okay, this one you really really should plot out the coordinates. It will give you an approximate orientation of the line. If plotted it out and realized that ST is a diagonal segment with a POSITIVE slope (meaning it goes up from left to right, that let you know that the y va...

**math**

No, I didn't say D is (3,-1). The question asks you for 3 points on the segment CD that will divide that segment to 4 pieces equally. I'm just saying that the CLOSEST point to CD is (3,-1) just to correct what drwls said. The 3 points on the segment CD are (3,-1), (3,2...

**math**

Just plot out the two points and connect them and count the number of squares on your graphing papers to find the length. You should have 12 squares total in length if you drew in correctly because (8+|-4|) =12. Now you need to divide that into 4 equal parts so do 12/4 = 3 uni...

**math**

3^2 is where I get the +9 from... the -6x is from (-3x)+(-3x). Solution = (-2,-1),(8,-1).

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