Thursday
November 27, 2014

Posts by amber


Total # Posts: 1,171

Chemistry
What is the empirical formula for Dichloroethane?
October 18, 2010

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010

Chemistry
How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?
October 17, 2010

Chemistry
How many milliliters of 6.0 M HCl would be needed if 3.000 g of K2CO3 were used in an experiment?
October 17, 2010

Chemistry
What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?
October 17, 2010

English 2
Need help with the same questions
October 17, 2010

chemistry
What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2
October 16, 2010

chem
Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats with hydrogen gas. ...
October 16, 2010

chem
A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct
October 16, 2010

Chemisrty
Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.
October 14, 2010

chemistry
how many moles of ions are released when 1.6 mol of ammonium phosphate is dissolved in water?
October 10, 2010

physics
Sorry for so many posts, but you would not use delta v/ delta t to find acceleration. correct? on the graph it shows that at 1.1 second the graph changes directions therefore the slope of the tangent line at that point is equal to zero. I plugged it into the formula you gave ...
October 10, 2010

physics
Oh okay, thank you. The only thing included was a graph giving the points t=0s, speed= 0cm per second; t= .5s, speed= 15cm per second; t=1.1s, speed =28cm per second; t=1.6s, speed=6cm per second.
October 10, 2010

physics
The figure below shows the speed of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 73.4 kg. Determine the force exerted by the chin-up bar on his body at the following times. t=0s, speed= 0cm per second; t= .5s...
October 10, 2010

physics
The next thing I tried was to solve for T from by fbd. I got T=m1g-m1a for the first mass, then T1-T2=-fk*m2g+m1a for the second, and T=m3g+m3a. I dont know if this is right or not. Since I am trying to find the acceleration of each mass can i set these equations equal to each...
October 9, 2010

physics
Im sorry, m1 is suspended by a pulley and string on the left side, m2 is on the table connected to the pulley by a string in the middle and m3 is suspended on the right side by a pulley and string which is also connected to m2. I am pretty sure I need to find an equation in ...
October 9, 2010

physics
Three blocks are connected on the table as shown below. The coefficient of kinetic friction between the block of mass m2 and the table is 0.400. The objects have masses of m1 = 3.00 kg, m2 = 1.45 kg, and m3 = 1.90 kg, and the pulleys are frictionless. Determine the ...
October 9, 2010

2nd grade math
Shawn is writing down the family recipes in a cookbook. He has 21 recipes left to write down. He has 3 pages left to fill up. If he wants to put the same number of recipes on every page, how many goes on each?
October 7, 2010

Physics
It actually wants to find how far you could climb with a penny.
October 5, 2010

Physics
Assuming 100% of your energy can be converted to electrical power, and electricity costs $0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units. I have 288.8 watts, and that's as far as I have been able to ...
October 5, 2010

calculus
differentiate f(x)=Tan^3(e^2x +1)
October 5, 2010

Math
"Kids have done bunches (of) dumb (and) clumsy mistakes" is how I remember it. Say, if you were trying to figure this problem out: 1000 mL = ___ L. "milli" is the last M. Say that's the decimal point. To get to L (base, or the middle of the letters, ...
October 5, 2010

Science
A current of 7.50 amperes flows through an air conditioner. If the volyage in the wall outlet is 110 volts, what is the resistance in the air conditioner?
October 5, 2010

chemistry
How many grams of KCl are required to make .75 L of 0.29 M solution? Round to one decimal place. i got .2907 is this correct im not sure about the decimal places thanks
October 4, 2010

chemistry
oh okay i got it thanks
October 4, 2010

chemistry
Your answer leaves me with 1.63 so is this wrong moles oxalic acid = 0.500 L x 0.122 M=0.610 the ratio between Fe2O3 and H2C2O4 is 1 : 6 moles Fe2O3 = 0.610/6=0.102 mass Fe2O3 = 0.102 mol x 159.69 g/mol=16.3 g It left me with 16.3
October 4, 2010

chemistry
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid. I know i need to ...
October 4, 2010

chemistry
write the balanced net ionic equation for this reaction Ba(OH)2+HCL-->
October 3, 2010

chem
whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42- (aq)___> Ag2So4(s) correct?
October 3, 2010

chemistry
so would the answer be M/L= 3.22 or .0322 ?
October 3, 2010

chemistry
what is the molarity of a solution made by mixing 178.5 of 1.5 M NaCl with 283.4m of 4.3M NaCl Mnacl*L nacle =(1.5)(.001718)=.0026775 moles nacl=(4.3)*(.002834)=.0121862 total moles = .0026775+.0121862=.0148moles final volume = .001785+.002834=.004819 L m/l= 3.21779 I dont ...
October 3, 2010

chemistry
137.33/233.43*.438=.258 .258/567*100= 44.8 got it now thanks
October 3, 2010

chemistry
To analyze for barium in an unknown white powder, an excess of sodium sulfate solution was added to a 0.576 g sample of the powder dissolved in water. A white precipitate of BaSO4 was isolated, dried, and found to weigh 0.438 g. What is the mass percent of Ba in the white ...
October 3, 2010

chemistry
whats arrgg mean?
October 3, 2010

chemistry
a 340.4 ml sample of solution contains 27.4 g of cacl2. calcuate the molar concentration of calcium ion in this solution. this is what i did 27.4(110.98) =.247mol .247mol/34.4L=.726Mcacl2 is this correct?
October 3, 2010

chemistry
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid.
October 3, 2010

chemistry
How many grams of water are formed when 43.4 g of hydrogen are consumed in an excess of oxygen? I got 390.6 is this correct?
October 3, 2010

Calculus 2
find the area of the region f(y)=y/(16-y^2)^1/2, g(y)=0, y=3
September 29, 2010

general chem
identify the 2 substances whose aqueous solutions have common properties to a marked degree and explain your answer. a) CuS, CuCI2, Na2 S, KCI b) HCI, HC2H3O2, NH4C2H3O2
September 29, 2010

Economics
Why is price stability and full employment important to our economy?
September 27, 2010

science
A bat flying in a cave emits a sound and receives its echo 0.4 s later. How far away is the cave wall? Assume the speed of sound to be 340 m/s. Answer in units of m.
September 26, 2010

college physics
A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.2 cm from the center of the disk, what are the revolutions per minute (rpms) of the disk? Can someone please help me solve this problem step by step. The ...
September 20, 2010

college physics
A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please help me solve this equation step by step?
September 20, 2010

Elements of Psychology
i know for sure these are correct 1)d 2)a 3)d 4)b 5)c 6)a 7)b 8)c 9)c 10)a 11)a 12)d 13)a 14)b 15)a 16)d 17)b 18)c 19)a 20)a
September 16, 2010

government
Without the _____ to implement them, the decisions of Congress would have no meaning
September 13, 2010

macro
Suppose that the position of a nation's long-run aggregate supply curve has not changed, but its long-run equilibrium price level has increased. Which of the following factors might account for this event? a. A rise in the value of the domestic currency relative to other ...
September 8, 2010

Chemistry
Thank youuu!
September 7, 2010

Chemistry
How many joules (J) are needed to increase the temperature of15.0g of lead from 20 degrees celsius to 40 degrees celsius? (Specific heat of Pb is 0.128J/g degree celsius)
September 7, 2010

algerbra
Your mom is correct. You distribute the negative sign to the rest of the equation but there are no common factors to be put together so, yes it would be -a+3b-27
September 7, 2010

math
An experiment consists of flipping a coin 3 times and noting the number of times that a heads is flipped. Find the sample space S of this experiment. S=?
September 7, 2010

domains of development
describe why it is important to consider each domain in the study of adult development
August 26, 2010

Math
Add: 5 squared(4 squared 2 - 6 squared 25)= thanks
August 15, 2010

Algebra
I think I have the correct answer.. just want to make sure.. the answer is y+2/y-2 right?
August 8, 2010

Algebra
Please help: (y^2+4y/y^2+2y-8)/(y/y+2)
August 8, 2010

Math
t/6 - t/14= 1/6 Is there a solution for this problem?
August 3, 2010

Creative writing
what are some drafting strategies when writing
July 7, 2010

Critical thinking
Break the problems into workable parts. (In this step, explain how you broke the assignment into smaller more easily tackled parts and provide a reason for each part.)
July 4, 2010

Pharmacy
Where would you find information on drug interactions in an older-style drug monograph?
June 23, 2010

Busine
Can u give me sites where to research. I have tumor so Ive been really sick
June 17, 2010

Busine
Briefly explain what is meant by objective and judgmental performance evaluation. Discuss two methods of judgmental evaluation. 5. (TCO 8) Briefly describe the purposes of job analysis and the two documents that often result from it. 6. (TCO 9) List the advantages and ...
June 17, 2010

EXP105
SUMMARIZE BLOOM'S THEORY IN YOUR OWN WORDS AND HIGHLIGHT THE MAIN COMPONENTS
June 14, 2010

ecology
In what ways can nature restore a damaged ecosystem?
June 6, 2010

algebra
You are hosting a party at a restaurant. The restaurant charges $150 to reserve the room plus $25 per person for food and drink. 1. Write a linear equation representing your total bill based on the number of people at your party. 2. If you graph this line, what is its slope? 3...
June 5, 2010

college
define social change
June 5, 2010

Physics
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
June 3, 2010

Physics
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
June 3, 2010

Physics
Light of wavelength 550 nm in air is found to travel at 1.96 x 10^8 m/s in a certain liquid. Determine the index of refraction of the liquid.
June 3, 2010

College Algebra
Can anyone please show me how to solve (5¡Ì7 ¨C 10¡Ì2)(4¡Ì7 + 8¡Ì2)
May 29, 2010

Physics
1. What is the intensity of a sound at the pain level of 120 dB? 2. What is the intensity level of a sound whose intensity is 2.0 x 10^-6 W/m^2?
May 29, 2010

spanish
the correct answer is A because sueter is masculine and singular; esta is used for feminine singular
May 29, 2010

Physics
A 0.50-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of 0.15 m. Determine (a) the velocity when it passes the equilibrium point, (b) the velocity when it is 0.10 m from equilibrium, (c) the total energy of the system, and (d) the equation ...
May 28, 2010

Physics
Light in air is incident upon a piece of crown glass at an angle of 45.0 degrees. What is the angle of refraction?
May 28, 2010

computer
what type of business is hot topic? franchise, soleproprietor,corporation or partnership
May 28, 2010

10th grade
-6x-x^2z^2-4yz
May 24, 2010

soc
what would be a intro that i could use about does punishment deter crime
May 23, 2010

soc
does punishment deter crime and why
May 23, 2010

soc
which type of punishment deters crime most effectively. and why. retribution, deterrence, rehabilitation and societal protection.
May 23, 2010

soc
which type of punishment deter crime most effectively
May 23, 2010

soc
do the consequences of punishment provide any beifits for criminals and society
May 23, 2010

Kaplan university
Could you please help me by rephrasing what it is asking me to do? Thank you.
May 20, 2010

Kaplan university
describe how something is learned using classical conditioning. Be sure to identify the unconditioned stimulus, the conditioned stimulus, the unconditioned response, and the conditioned response. For the second example you will use the theory of operant conditioning. For your ...
May 20, 2010

ENGLISH
The topic is: Why is it important to say what you think?
May 20, 2010

ENGLISH
I am having a hard time understanding key points to write my essay on. Can I get some opinions on why it is important to speak your mind?
May 20, 2010

World History
The military conquest of the assyrians were made possible by their A. powerful navy B. Efficient military organization and warlike spirit C. alliance with Egypt D. Country's natural barriers, which protected them from invasion by outsiders The famous orator who spoke out ...
May 20, 2010

adult education
Law means the rules or guidelines we must live by. To me justice is when someone has been punished for breaking the law or rules we live by. In the end the victim gets closure.
May 19, 2010

Rephrasing a sentence
during the years of our aquaintance, i have known guillermo to always be determined to long term goals and follow through with them; he truly is a man of his word .
May 15, 2010

Math!!!
Simplify the following including like terms 13rs(squared)-r+42s(squared)+6s(squared)-8rs(squared)-3r
April 28, 2010

science
make a phrase out of these letters; csmataquennteers
April 27, 2010

10th grade Biology
what adaptations are needed if an organism performs internal external fertilization?
April 24, 2010

social studies
my teacher said that there is religious conflict in egypt could you please in two or there sentences tell me about it i am curious
April 16, 2010

analogies
CHANGE
April 7, 2010

math
there are 30 students in class. 1/5 of the class are girls. how many boys are in the class
April 6, 2010

HCA 230
Do I need to do research online fot the paper on the soicallization of caregivers or if the information is in the reading?
April 4, 2010

chem
What volume of 0.200 M Fe(NO3)3 is needed to make 50ml of o.oo200M Fe(NO3)3?
March 28, 2010

math
what two steps do u follow to tell if a table is a direct variation/proportion?
March 24, 2010

10th grade
Read the following paragraphs and in the space provided below, identify each highlighted word as a direct object, an indirect object, a predicate nominative, or a predicate adjective. Example: I enjoy [1] cooking but it can be hard [2] work. 1. direct object 2. predicate ...
March 22, 2010

3rd grade
use a grid draw two different figures that each have a perimeter of 14.
March 9, 2010

physics
You want to swim straight across a river that is 76m wide. You find that you can do this if you swim 28 degrees upstream at a constant rate of 1.7m/s relative to water. At what rate does the river flow? The angle is measure from the river bank (directly upstream is 0 degrees ...
March 7, 2010

Fondations of business
Read the two case studies on pages 233-236 of the text. Answer the following in a 200- to 300-word response: What motivation theories may be found in each case study? Describe the theories found in each case study and cite specific examples. What was each business owner's ...
March 4, 2010

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