Questions Asked on
March 12, 2010

Chemistry
In a saturated solution of silver phosphate, the concentration of silver ion is 4.5 x 10^4 mol/L. The Ksp of silver phosphate would be which of the following? 6.8 108 1.0 1011 1.4 1014 none of the above 1.5 1015 In a saturated solution
asked by Bobby 
College Chemistry
a solution contains .25M Ni(NO3)2 and .25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3?Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no
asked by Jim 
chemistry
A flask contains this equilibrium Fe3+(aq) + SCN1(aq) FeSCN1(aq) What is observed if a few drops of iron(II) chloride is added to this equilibrium? a it becomes darker red b it becomes lighter red none of the above c it becomes colourless d. nothing
asked by Stephan 
chemistry
1.2 mol of CH3OH(g) are injected into a 2.0 L container and the following equilibrium becomes established. 2H2(g) + CO(g) CH3OH(g) + 92 kJ If at equilibrium 1.0 mol of CH3OH is still in the container the Ke must be which of the following? a. 25 d. 12.5 b.
asked by Jess 
Algebra
A landscaping company sells 40pound bags of top soil. The actual weight x of a bag, however, may differ from the advertised weight by as much as 0.75 pound. Write an inequality involving absolute value that expresses the relationship between the actual
asked by Anonymous 
Chemistry
Suppose that 0.483 g of an unknown monoprotic weak acid, HA, is dissolved in water. Titration of the solution with 0.250 M NaOH(aq) required 42.0 mL to reach the stoichiometric point. After the addition of 21.0 mL, the pH of the solution was found to be
asked by Val 
chemistry
how can the mixture of iron fillings and sulphur be separated?
asked by amos 
quimca
Draw the Lewis structures for the following molecules: a. IBr d. SiCl4 b. CH3Br e. OF2 c. C2HCl
asked by doralis 
Chemistry (heat flow, simple)
Well I know to calculate heat flow you use, q=ms delta t. for this experiment we mixed naoh with hcl into water. the total mass (volume) of the mixture was 100g the temperature change for naoh was 11.7 degrees C and for hcl it was 11.8 degrees C now im
asked by Abdullah 
Thermodynamics
a rigid vessel of volume 1m(^3) contains steam at 20bar and 400 degrees Celcius. The vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel, the final pressure of the steam and the heat rejected during the
asked by Claire 
Chemistry
Which of the following systems would be considered to be at equilibrium: I. an open flask with 2.0 mL of perfume II. a closed flask with 10 mL of water III. an open flask with 10 mL of water IV. a closed flask with an ice cube and 10 mL of water a. I d. b.
asked by Mario 
personal finance
Based on the following information,what account would be subtracted from the bankbalance side of a checkingaccount reconcilation? Service charge $12,Outstanding checks $145,Interest $$ 3.50,Deposit in transit $80 a)$145 b)$12 c)$157 d)$148.50 IS C RIGHT
asked by vedrana 
Chemistry
A gasfilled balloon having a volume of 3.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are −23°C and 3.00 10−3 atm, respectively. Calculate the final
asked by Heath 
quimica
Compare the molecules H2NNH2 and HNNH. Which molecule has the stronger NN bond?
asked by doralis 
Chemistry...Attn DrBob222
Thanks for your earlier thoughts. Am still working on the problem and would like to know if you have any thoughts on my approach below: If I have a set of data that gives the apparent partition coefficient as a function of pH, over a range of pH 210, how
asked by Renee 
CHEm 1442
Calculate the pH of a 0.21 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 105.
asked by pinki 
Chemistry
In a saturated solution of silver phosphate, the concentration of silver ion is 4.5 x 10^4 mol/L. The Ksp of silver phosphate would be which of the following? 6.8 108 1.0 1011 1.4 1014 none of the above 1.5 1015
asked by Bobby 
Chemistry
How much heat is needed to melt a 25 gram icecube at 0 °C? The molar heat of fusion for water is 6.01 kJ/mol. A) 6.01 kJ B) 8.35 kJ C) 150.25 kJ D) 3.34 kJ E) 9.22 kJ
asked by Natalie 
algebra
A lightyear is the distance that light travels in one year. Find the number of miles in a lightyear if light travels 1.86 × 105 miles/second. (Round to one decimal place, and assume that there are 365 days in a year.)
asked by larry 
personal finance
If your monthly net (after tax) income is $ 1500,what should be your maximum amount spent on credit payments? a)$ 200 b)$300 c)$400 d)$500 IS B CORRECT ANSWER?THANK YOU:)))
asked by vedrana 
science
a current of 4a flows through a 12v headlight for 10min calculate energy transfered during this time
asked by nik 
Chemistry
Suppose that 30.0 mL of 0.20 M C6H5COOH(aq) is titrated with 0.30 M KOH(aq). Refer to table 1 and table 2. (a) What is the initial pH of the 0.20 M C6H5COOH(aq)? Using ICE i found to be 2.46 The rest I do not know how to set up or solve... (b) What is the
asked by Val 
PHYSICAL CHEMISTRY
For the equilibrium 2SO2(g) + O2(g) = 2SO3(g), what will change the value of Kp? A adding a catalyst B adding more O2 C increasing the pressure D increasing the temperature
asked by HIMADITYA 
Chemistry
State whether each of the following aqueous solutions would be acidic, basic, or neutral. Include appropriate netionic equations to show why a given solution is acidic or basic. a) NaNO3 b)KC6H5CO2 c)50:50 mixture of C6H5CO2H+KC6H5CO2 d)(CH3NH3)Cl e)50:50
asked by Anonymous 
Physics
In a laboratory experiment, one end of a horizontal string is tied to a support while the other end passes over a frictionless pulley and is tied to a 1.3 kg sphere. Students determine the frequencies of standing waves on the horizontal segment of the
asked by Gabe 
moles of water produced?
We mixed HCl and NaOH into water and got this table, all for trial 1 Here is all of the info for trial 1: trial 1: volume of 2 M NaOH used: 50.0 mL initial temperature of NaOH: 24.4 degrees C volume of 2 M HCl used: 50.0 mL initial temperature of HCl: 24.3
asked by Abdullah 
Chemistry
For the reaction, 2SO2(g) + O2(g) ¨ 2SO3(g) + heat, at equilibrium, what will be the effect on the net amount of SO3 present if the temperature of the container is increased? A) The concentration of SO3 decreases. B) The concentration of SO3 increases.
asked by Natalie 
trig
How do I solve for theta in tan theta = 1?
asked by Matthew 
chemistry
2H2 + O2 yield 2H2O to calculate bond enthalpy, we have to take bond breaking minus bond making, how do we know which one is bond breaking and bond making
asked by bme1 
math
Hey I need some help with this problem. Any ideas on how to solve it? Thanks lots. : A hardware supplier manufactures three kinds of clamps, types A, B and C. Production restrictions require them to make 10 units more type C clamps than the total of the
asked by Jacob 
chem
from the equation : c3h8+5O2=3CO2+4H20 HOW MANY GRAMS OF H2O CAN BE PRODUCED FROM THE REACTION OF 8.5X10^22 MOLECULES PROPANE GAS, C3H8
asked by marina 
english
the sentencemarsha speak excellent german should german be capitlized
asked by jacob 
physics
Short projectile motion question A German rocket from the second world war had a range of 3000meters reaching a maximum height of 1000meters. Determine the rockets maximum velocity
asked by jake 
quimca
Dibujar las estructuras de Lewis para los siguientes moléculas: a. IBr d. SiCl4 b. CH3Br e. OF2 c. C2HCl
asked by doralis 
math
one side of a right triangle has 2cm less than the hypothuse, and 7cm more than the third side what is the lenghnt of each side
asked by devin 
Chemistry
I am about to do an extraction experiment, and needed help with a question to improve my understanding. Any help appreciated. 1. You have 150 ml of a solution of benzoic acid in water estimated to contain about 5g of the acid. The distribution coeffcient
asked by Natasha 
trig
y=4cos(3x2(3.14))
asked by billy 
crt205
We gradually came to realize that equal protection really had to say that we can't discriminate in school attendance, and then beyond school attendance into many other fields. Is this a rhetorical device?
asked by sam 
Corporate tax
11. Molly, Inc. a domestic corporation, owns 15% of PJ. Inc. and 12% of Emma, Inc., both foreign corporations. Molly is paid gross dividends of $35,000 and $18,000 from PJ and Emma, respectively. PJ withheld and paid more than $10,500 in foreign taxes on
asked by Lashay 
Spring Break
Can I still ask you guys for help during the week of March 1519? I have a feeling that you won't be available during the break.
asked by AL 87 
Chemistry
I have another similar problem. I have calculated everything given (Correctly), but I can't seem to get the right pH for the stoichiometric point (I keep getting 7.16) Question: Suppose that 50.0 mL of 0.25 M CH3NH2(aq) is titrated with 0.35 M HCl(aq).
asked by Val 
Financial Engineering
Describe a potential arbitrage strategy if a put price is the same as the negative of a forward if the strike are the same. You need to specify the number of units you would long/short for each instrument, initial cash flow, and final cash flow. An
asked by Samuel 
math
A balloon in the shape of a sphere is deflating. Given that t represents the time, in minutes, since it began losing air, the radius of the ballon (in cem) is r(t)=16t. Let the equation V(r)= 4/3 pi r^3 represent the volume of a sphere of radius r. Find
asked by andrea 
math
Short projectile motion question A German rocket from the second world war had a range of 3000meters reaching a maximum height of 1000meters. Determine the rockets maximum velocity
asked by devin 
Human Capital
As a manager, explain the importance of understanding the controllable and uncontrollable financial affects on a business environment. What can you do to limit these financial constraints? What are some of the high cost items from a human resources
asked by Wallace 
math
Freddie Fast can make 6 4/5 chairs per hour on a furniture assembly line. Warren Weary makes 4 1/2 chairs per hour. In a 10hour shift, how many more chairs does freddie make than warren? and if i may i would also like a small explanatation please i just
asked by edward 
geometry
I am trying to find the interior and exterior angles of a 9 sided polygon .
asked by neil 
Thermo
In an isothermal reaction (either reversible or irreversible), DELTA T is constant..hence zero since temperature remains constant, can we also assume that heat is also zero? if so, how then is an isothermal reaction different from an Adiabatic one?
asked by Kim P 
Finance
LaJolla Securities, Inc. specializes in the underwriting of small companies The terms of a recent offering were as follows: Number of shares 2 million Offering price $25 per share Net proceeds $45 million LaJolla Securities expenses, associated withthe
asked by Nancy 
math
In a Gallup poll of 1,038 adults, 540 said that secondhand smoke is very harmful. What is the percentage of adults who said secondhand smoke is very harmful?
asked by Anonymous 
social studies
can someone please help me on creating a timeline on the major themes or paradigm shifts in american history from the columbus voyages through the mexican american war 18461848. I need some hel[ i have never done a timeline. If you can give me some
asked by Dellaine 
Chemistry
What substance is a better oxidizing agent in each of the following pairs? Explain. a) Co2+ or Cr3+ b) Mn2+ or I2 I think C02+ and I2 because they are above on the table. Is this correct or do I need more information in my answer?
asked by Leanne 
geometry
A triangel has sides 36 5/6 yards, 33 4/5 yards, 17 9/10 yards. What is the perimeter (distance around) of the triangel in yards? Write answer in mixed number form and reduce if possible
asked by Queen 
Math
Hi, I am doing a practice exam, and I came across this problem and I am have difficultly starting it. A UFO flies horizontally at a constant speed at an altitude of 15 km and passes directly over a tracking telescope on the ground. When the angle of
asked by Anonymous 
Chemistry II (College)
How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a firstorder reaction with a halflife of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas
asked by Tim 
Intro Chemistry
An 0.6600 mol sample of an ionic compound has a mass of 131.9 g. Determine the mass (g) of one formula unit of the compound. I have no idea how to do the problem. I need help please, I'm reviewing for an exam. Thank You!
asked by echem 
social studies
Last 4 discuss the power of the states and procedures for amending the Constitution
asked by mels 
SAT
This is definitely not homework. I just want to know what would be the best book for preparing my self for the SAT.
asked by Amir 
chemistry
calculate the enthalpy change for the following (unbalanced equation) assume all reactants and products are in their standard states Fe2O3(s)+Al(s)> Fe(s)+Al2O3(s) please answer me as soon as possible.
asked by hrithik 
cell biology
Why do the preparation of the medium in original paper of Eagle needs to put the salts in two different bottles for storage? I guess it has something related to valence but I can't put it in a clear way.
asked by Holly 
sci 275
Population Size Checkpoint
asked by Anonymous 
physics
If ball c slid down the hill without friction, how fast would it be traveling the instant it reached the bottom of the hill?
asked by martin 
Chemistry II (College)
How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a firstorder reaction with a halflife of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas
asked by Tim 
mat115
Determine the maximum and minimum values of the following set of numbers. –12, 19, 12, 10, –24, 1, –1
asked by Lynn 
chemistry
How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
asked by khin 
Political Sciences
Consider the follow scenario: You are a criminal defense attorney, and your client has just been found guilty by the U.S. district court in Illinois. Respond in 200300 words with these questions. What are your options for appeal? Describe the appeals
asked by anonymous 
mat 115
If $1,000.00 is deposited into an account paying 3% interest compounded annually (at the end of each year), how much money is in the account after 5 years? (Round to the nearest cent.) I cannot remeber the formula for this problem can you help
asked by Mickey 
Math
How do I find the derivative of sin^2(x) or written as sin(x)^2?
asked by Anonymous 
art
why did kenneth clarks interpretation of the aferican mask is ethnocentric
asked by Brian 
history
Create a five to sevenpoint, bullet point list of the factors that led to political stalemate and the subsequent farmers’ revolt in the late 19th Century.
asked by Anonymous 
maths
1. Sphere C(2,1,3), radius=7. T plane at (4,2,1)=? (a) 6x3y+2z=0 (b) r.(6,3,2)=28 (c) 5x3y2z=28 (d) r.(6/7,3/7,2/7) 2. Sphere (x1)²+(y5)²+(z2)²=49 and planr r.(2,6,3)=0 form which circle?(a) (x1)²+(y5)²+(z2)²=19.53 (b) C(0,0,0),
asked by Anonymous 
Chemistry
The titration of a 50.0 mL solution of the monoprotic bromoacetic acid (pKa = 3) takes 10 ml of 0.01 mol L1 NaOH to reach the stoichiometric point. What was the initial concentration of bromoacetic acid? A) 0.02 mol/L B) 0.01 mol/L C) 0.002 mol/L D) 0.001
asked by Connie 
physics
100cm3 of air at 10 degree centigrade is heated to 80 degrees centigrade.What will be the new volume of the pressure that remains as atmospheric pressure?
asked by alee 
Chemistry
What is the heat outflow when 2kg of dry saturated steam at 8.0 bar is converted into ice at 10°C
asked by Beata 
Chemistry
Condensation occurs on a bathroom window at a rate of 0.5 kg per hour. If the bathroom air is at 26°C and fully saturated with water vapour, what is the rate of heat transfer on the window surface if the inside surface is maintained at 5°C.
asked by Beata 
Calculus
When f(x)= 2/x (4th power)  7/x (2nd power) + 5 find the derivative
asked by Pat 
History
Which Native American tribe were the traditoinal alliis of New France
asked by Kim 
learn 49 math
a road trip has a scale of 5/8 inches for every 125 miles.. how many inches would be needed to represent 1000 miles on the map?
asked by Ricardo 
math
5 x (x + 2y)  (5x +2y) + y(2x + z) translate into a word phase.
asked by emily 
Finance
The Norman Company needs to raise $50 million of new equity capital. Its common stock is currently selling for $50 per share. The investment bankers require an underwriting spread of 3 percent of the offering price. The company's legal, accounting and
asked by Nancy 
Finance
LaJolla Securities Inc., specializes in the underwriting of small companies. The terms of a recent offering were as follows: Number of shares 2 million Offering price
asked by Nancy 
government
list of three federal government strategies of unification.
asked by Anonymous 
Mat115
Deterimie the max and min values of the following set of number 12, 19, 12, 10, 24,1,1
asked by Lynn 
mat115
Perform the indicated operation. 11/7  6/7
asked by Lynn 
chemistry
How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
asked by khin 
Math
Find the simple interest on a loan of $100 at an interest rate of 2% for 7 years.
asked by Julie 
english
what is purpose in characteristics of interpersonal communication between a instructor and classmate
asked by Anonymous 
physics
1.calculate the commutators a/ [x^2,p^2] b/ [a,a^+n] I don't know how to solve it. Please help. I really appreciate.
asked by bun 
maths
The line r=(2,3,4)+µ(1,0,3) and the point (6,0,2) form which plane: (a) r.(1,0,3)=10 (b) r.(9,10,3)=60 (c) r.(2,3,4)=29 (d) r=(2,3,4)+µ(1,0,3)+ù(6,0,2) Please help!!! Thanks!
asked by Anonymous 
science
what happens as a metal breaks? does the crystals of the crystal lines break? explain and make a sketch
asked by Ernest 
social studies
Who invented the ice box?
asked by Michaela 
algebra 2 factoring
3psqrt321psqrt2p+7
asked by justine 
History of Religion
I have two questions for you and for both of these it would help to know something about the Roman Catholic Church in the past. Anyway, firstly, did dioceasan bishops always have to reside within the confines of their dioceases? Also, who was the first to
asked by Miguel Santos 
SCI275
creating and outline of the risk of using malathion according to the four steps of risk assessment presented in ch.4 figure 4.1
asked by norma 
english
i need help writing about a goddess that take cares of a lake or river.
asked by Anonymous 
Bio 2
Why was the recapitulation theory really exciting for everyone back then? And now we don't even have it mentioned in our biology books...
asked by Nina J 
chemistry
If I have a set of data that gives the apparent partition coefficient as a function of pH, over a range of pH 210, how do I calculate the Ka of the compound?
asked by Renee 
english
What factors should be used to determine a playwright's target audience?
asked by Terri 
Biology
Need help with this 16. The exoskeleton of an insect a. does not have any muscles attached to it b. is moved by muscles that are attached to the inside of the exoskeleton c. is thickest where the joints of the appendages are located d. is moved only by
asked by mysterychicken 
Mat115
Subtract 7/9  (13/18)
asked by Lynn 
math
x^28x+16
asked by lauren 
Imagery
I need help finding an image that illustrates LIFE. Any suggestions?
asked by Steph 
Math
Do you know where I can find a list of all the formulas? Like for volume of a cone, sphere, areas, etc?
asked by Anonymous 
Math
Solve using long division 0.5 ÷ 0.02
asked by Natatlie 
Economics
Would a change in money supply shift the LAS curve?
asked by Rach 
Math
How would I find the formual of power function out of these 2 point? (5,75)(10,600)
asked by Jonathan 
11th grade
convert into moles 1.44*10^25 atoms C = ? moles C
asked by Anonymous 
computers
i need this decrypted if anyone can help that would be great 1b4a045c34a0573ca57657a1021dc171
asked by David 
Economics
Would a reason the aggregate demand curve shifts downward be because of: A lower price level decreases consumption?
asked by Rach