Thursday

February 11, 2016
Total # Posts: 431

**Chemistry**

The determination of 4.000 mmol of ZnCl2 is performed gravimetrically by the addition of NaCN solution in a Total volume of 200.00ml. Ksp = 3.0X10^-16 for Zn(CN)2. State and verify all assumption. Assume cyanide does not hydrolyze. a. Derive the COC and COM equations for the ...
*December 22, 2012*

**PLEASE HELP-CHEMISTRY**

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr? ?
*December 19, 2012*

**CHEMISTRY HELP NOW**

A balloon at a pressure of 755 torr and a volume of 5.00 L was allowed to rise in the atmosphere to a point at which the pressure inside and outside the balloon was 697 torr. What was the volume of the balloon at that altitude, assuming the temperature was constant?
*December 19, 2012*

**Math**

Jean surveyed 25% of all eighth graders and 75% of all 7th graders. John surveyed 50% of all eighth graders and 50% of all 7th graders at the same school. Jean surveyed a total of 152 John surveyed a total of 144 What is the number of eighth graders?
*December 17, 2012*

**Math **

what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
*November 29, 2012*

**Math **

what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
*November 29, 2012*

**Math **

what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
*November 29, 2012*

**Business Math Question**

You borrow $2,600 and repay the loan in 12 monthly installments of $232. What was the finance charge per $100 of the amount financed?
*November 8, 2012*

**Business Math Question**

Finance charge of $2.50 per $100 for 3 payments.
*November 8, 2012*

**Business Math Question**

Find the finance charge per $100 on a loan of $12,600 with a finance charge of $1,638.
*November 8, 2012*

**College Chemistry**

Using the molar volume (STP) or the ideal gas law equation, determine the molar mass,g/mole, of each of the following. A: 11.2g of a gas that has a volume of 1.50Lat STP? B: .0710g of a gas that has a volume 825ml at 1 atm
*October 21, 2012*

**College Chemistry**

A 14.0 g sample of Krypton has a temperature of 25C at 625mm Hg. What is the volume, in Milliliters, of the krypton?
*October 21, 2012*

**economics**

which of the following statements about inflation are true? check all that applies a) policy makers also worry about a negative inflation rate, or deflation b) painful government actions may sometimes be necessary to bring down a high inflation rate. c) A moderately high ...
*September 23, 2012*

**Calculus**

Nevermind, I got it! I forgot that I could divide everything by the highest power x in the denominator.
*September 14, 2012*

**Calculus**

I'm supposed to find the limit as x approaches infinity of (2-x-sinx)/(x+cosx). I've thought about using the squeeze theorem, but I'm not sure it applies here. Can someone point me in the right direction? Thanks.
*September 14, 2012*

**Math**

No Idea, the question completely asks that. I was thinking about 12% annually compounded, but the answer I got was wrong due to Solve and Check.
*September 8, 2012*

**Math**

How much must you deposit in an account that pays 6% semi-annual interest, compounded annually, to have a balance of $9000 in 15 years? I'm stuck with this question, please explain the steps for the answer.
*September 8, 2012*

**Math**

How much must you deposit in an account that pays 6% semi-annual interest, compounded annually, to have a balance of $9000 in 15 years?
*September 8, 2012*

**statistics**

Can a percentile have the VALUE of 517? Can a percnetile have the VALUE -5.8? Can a percentile have the RANK 517? Can a percnetile have the RANK -5.8?
*August 29, 2012*

**statistics**

is it likely to arrive at a correct research conclusion after making an incorrect statistical conclusion?
*August 29, 2012*

**reading**

EVERYBODYS ANSWER IS DIFFERENT!!! -.-
*August 9, 2012*

**English **

What is the verb in "where are my shoes"
*July 24, 2012*

**computer**

can someone explain this statement please int a=(int *)new int[4][3];
*July 22, 2012*

**CRITICAL THINKING**

Please post a substantive response to the following discussion questions by clicking on Reply: Aristotle developed a theory of persuasion by which there are three ways a speaker can persuade an audience. Ethos is the idea that an audience can be persuaded by a speaker's ...
*June 28, 2012*

**Essay**

i agree where is the answer
*June 21, 2012*

**Math**

A buyer is paying a reduced $500 in closing costs on a home with a sale price of $95,000 in the state of Bath, Maine. If the buyer obtains an FHA loan, what would be the monthly payment if the loan is at 9 percent for 10 years?
*April 15, 2012*

**math**

Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction. A. 245/1152 B. 4/10 C. 2/5 D. 42/48
*April 12, 2012*

**physics**

A person exerts a horizontal force of F = 174 N in the test apparatus shown in the drawing. (h = 0.33 m.) Find the horizontal force M that his flexor muscle exerts on his forearm.
*March 27, 2012*

**5th grade Math**

What is the algebraic expression for 24 more than b
*March 27, 2012*

**calculus**

that has to do with trig substitution i believe..
*March 12, 2012*

**calculus**

evaluate the ∫from square root of 2 to 2 1/x^3square root of x^2-1 dx 1/24(-6+3 square root of 3 + pi) but i got something different
*March 12, 2012*

**Math**

29 * 6^(-3x) = 13 Thanks!
*March 11, 2012*

**accounting URGENT HELP DUE IN 1HR**

(a) Fill in the missing amounts. (If answer is zero, please enter 0. Do not leave any fields blank.) Account Titles Trial Balance Adjusted Trial Balance Dr. Cr. Dr. Cr. Accounts Receivable 34,000 Prepaid Insurance 26,000 20,000 Supplies 7,000 Accumulated Depreciation 12,000 ...
*March 11, 2012*

**physics**

A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.0 rad/s in 0.901 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.
*March 8, 2012*

**physics**

A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.0 rad/s in 0.901 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.
*March 7, 2012*

**physics**

A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, ...
*March 7, 2012*

**Grammer- Capitaliation**

Assistant dean Shirin Ahmadi recommended offering more language courses. We went to the mark taper forum to see a production of angels in america. Lydia's aunt and uncle make modular houses as beautiful as modernist works of art We amused ourselves on the long flight by ...
*March 3, 2012*

**COLLEGE CALCULUS. HELP!**

Damon is right, I forgot to apply the chain rule.
*February 26, 2012*

**COLLEGE CALCULUS. HELP!**

1. 1 turns to 0 2x turns to 2 x^3 turns to 3x^2 (bring 3 up front & subtract 1 from exponent) ^1/4 goes up front and subtract 1 from that =-3/4 Final answer would be 1/4(3x^2+2)^-3/4 2. Use same procedure 1/3 (sec^2t) ^ -2/3
*February 26, 2012*

**accounting**

Jack Shellenkamp owns and manages a computer repair service, which had the following trial balance on December 31, 2011 (the end of its fiscal year). BYTE REPAIR SERVICE Trial Balance December 31, 2010 Cash $8,000 Accounts Receivable 15,000 Parts Inventory 13,000 Prepaid Rent ...
*February 25, 2012*

**math**

It'll be 2z=24 divide both side by 2 z=12
*February 25, 2012*

**Chem**

Calculate the volume of .300 M NaOH needed to prepare a pH=3.50 buffer with 250ml of .075M HF solution. pKa (HF) = 3.15
*February 11, 2012*

**physics**

Waves on a particular string travel with a speed of 17 m/s. By what factor should the tension in this string be changed to produce waves with a speed of 102 m/s
*February 7, 2012*

**Chemistry 2**

How many cans ( each containing 14.0 oz of propane) would be required to convert 41.7 lbs of ice at -15.0 C to water at 100 C ( the boiling point at standard pressure)
*February 2, 2012*

**Trigonometry**

The tires on a car have radius 14 inches. Find the angular speed of the car tire in revolutions per second when it is traveling 70 mph. Find the angular speed at 80 mph. The tires on a car are 15 inches. Find the linear speed of the car when the tires are rotating at 900 ...
*January 21, 2012*

**Geometry**

Y is the midpoint of segment XZ. If XZ is 64 units long, how long is
*January 18, 2012*

**Physics**

Ok Here are my answers, if you can give me any more help it would be greatly appreciated. 1. 1000+1200=2200 2. Fw = ma 1000*9.8 m/s^2 = 9800 1200*9.8 m/s^2 = 11760 Fw = 21,560 3. Momentum = mv 1000*7 + 1200*6 7000 + 7200 Momentum = 14,200 kg m/s 4. 14,200 / m1+m2 14,200 / 1000...
*January 6, 2012*

**Physics**

Sorry, I can do part 1 and 2 relatively easily. However, I suck at physics and was honestly hoping to receive an answer like the one you gave me. I just wanted to know how to do it, not necessarily get the answer. Thanks
*January 6, 2012*

**Physics**

A 1000 kg car is moving at a constant speed of 7 m/s when it hits the back bumper of another car with 1200 kg of mass moving in the same direction at a constant speed of 6 m/s. As a result of the collision both bumpers get coupled. Show all work and calculations. 1. What is ...
*January 6, 2012*

**Economics**

Supply is Demand is Scenario A elastic elastic Scenario B elastic inelastic Scenario C inelastic elastic Scenario D inelastic inelastic Which scenario describes the market for oil in the long run? A. A B. B C. C D. D
*November 29, 2011*

**Economics**

Sandra purchases 5 pounds of coffee and 10 gallons of milk per month when the price of coffee is $10 per pound. She purchases 6 pounds of coffee and 12 gallons of milk per month when the price of coffee is $8 per pound. Sandraâ€™s cross-price elasticity of ...
*November 29, 2011*

**Economics**

Which of the following would not interfere with market equilibria? A. a minimum wage B. a rent control C. a non-binding price floor D. a binding price ceiling
*November 29, 2011*

**Economics**

The price received by sellers in a market will decrease if the government Answer A. imposes a binding price floor in that market. B. decreases a binding price ceiling in that market. C. decreases a tax on the good sold in that market. D. increases a binding price floor in that...
*November 29, 2011*

**Economics**

Suppose the government has imposed a price floor on the market for soybeans. Which of the following events could transform the price floor from one that is not binding into one that is binding? A. Farmers use improved, draught-resistant seeds, which lowers the cost of growing ...
*November 29, 2011*

**Math**

Also, there is a smaller similar triangle with the sides of 5, 6, and 9. This is sted in the problem.
*November 1, 2011*

**Math**

The perimeter of a triangle is 50. What steps do I need to take to find the length of the sides?
*November 1, 2011*

**Russian**

russian farmland has been damaged by
*October 24, 2011*

**High School **

based on my school they look at the star tests from 7th grade because when you go to 9th grade the star test scores wont be out by then
*October 20, 2011*

**Algebra**

How do i find the slope and y- intercept of 5X+2Y=7 ?
*October 19, 2011*

**physics**

A mass of 0.04 kg is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed 4.9 m/s in a circle of radius 0.4 m. The cord is then slowly pulled from below, decreasing the radius of the circle to r2 = 0....
*October 19, 2011*

**Math**

julia needs to purchase a ladder that just reaches the top of a 16 foot building. if the bottom of the ladder will be placed 12 feet from the base of the building how long should julia's ladder be?
*October 8, 2011*

**Physical Science**

3.B
*September 26, 2011*

**MAth (make equation true)**

PLease help 5 + 4 x 3 - 1 = 18 use grouping symbols to make each equation true.
*September 14, 2011*

**science**

how long does it take to dissolve 3 ice cubes in a glass of water
*July 27, 2011*

**Math**

Sorry, shared computer at school, but can you help???
*July 27, 2011*

**Math**

Tickets to a game are $5 for adults and $2 for children. Six hundred tickets are sold for a total of $2160. How many adult tickets and how many children's tickets have been sold?
*July 27, 2011*

**math**

d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didnt get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]
*July 22, 2011*

**chemistry**

Starting with a 2.0 M NaOH solution, determine how you would prepare 1 L of a 0.1 M NaOH solution.
*June 27, 2011*

**physics (special relativity)**

A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e). (a) show that the folowing process is dynamically impossible. (b) Explain in detail how this process can be made possible (c) for part b what would be the minimum photon ...
*June 8, 2011*

**Physics**

A uniform disk of mass 2kg and radius 10.0cm is spinning on a fixed frictionless bearing at 3 revolutions/second. A think cylindrical shell of mass 2kg and radius 10cm is carefully dropped onto the spinning disk so that they end up spinning together, with their edges ...
*May 15, 2011*

**Math 120**

A recent study of 750 Internet userd in Europe found that 35% of Internet users were women. What is the 95% confidence interval of the true proportion of women in Europe who use the Internet? A)0.321<p<0.379 B)0.316<p<0.384 C)0.309<p<0.391 D)0.305<p<0.395
*May 3, 2011*

**Math 120**

D The value of a correlation coefficient can only be in the range of -1<x<1
*May 3, 2011*

**Math 120**

Which of the followinf could not be the value of a correlation coefficient? A) -0.683 B) 0.197 C) 1.000 D) -1.369
*May 3, 2011*

**Chemistry**

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
*April 29, 2011*

**Chemistry**

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
*April 29, 2011*

**Chemistry**

Should it be 4 then?
*April 25, 2011*

**Chemistry**

Functional groups 1. are the repeating unit of polymers. 2. are groups of atoms whose chemical prop- erties are pretty much independent of their chemical environment. 3. perform specific biological functions using molecular recognition. 4. are a fictitious concept like ...
*April 25, 2011*

**Algebra**

Use Gauss-Jordan to solve 3x + 2y = -4 4x – 2y = -10
*April 25, 2011*

**Chemistry**

How do you figure out hydrate formulas?
*April 23, 2011*

**physics**

AC power in the United States has 60 cycles per second. What is the period (in seconds) for this current? Round your answer to 3 decimal places.
*April 11, 2011*

**Phyiscs - Electro static**

Particles 1 and 2 of charge q1 = q2 = +3.20 x 10-19 C are on a y axis at distance d = 22.0 cm from the origin. Particle 3 of charge q3 = +9.60 x 10-19 C is moved gradually along the x axis from x = 0 to x = +5.0 m. At what value of x will the magnitude of the electrostatic ...
*April 2, 2011*

**earth science**

what is the tectonic setting of seattle washington?
*March 28, 2011*

**chemistry**

A certain voltaic cell has a standard cell voltage of 1.22 V, and 3 electrons are transferred in the overall cell reaction. What is the value of the thermodynamic equilibrium constant for this cell reaction at 298K?
*March 15, 2011*

**Grammar**

Whole holes
*March 9, 2011*

**computer science**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 7, 2011*

**computer Science (need answer ASAP)**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 6, 2011*

**Chemistry**

Aluminum metal is used in many products. It quickly reacts with oxygen in the reaction 4Al (s) + 3O2 (g)--> 2Al2O3 (s). Which component is different on each side of the equation arrow? a. mass b. atoms c. moles d. all are the same.
*February 16, 2011*

**Math**

Acceleration due to gravity
*February 6, 2011*

**6th grade math**

107.25/ 0.03
*January 24, 2011*

**science**

In the system shown in the figure , block A has mass m_A = 2.08 kg, block B has mass m_B = 0.370 kg, and the rope connecting them has a nonzero mass 0.203 kg. The rope has a total length 1.03 m and the pulley has a very small radius. Let d be the length of rope that hangs ...
*January 18, 2011*

**Math**

What is the circumference of a circle with a diameter of 10 m.
*January 17, 2011*

**m**

What is the sum of the measures of the exterior angles of an 11-side polygon, one at each vertex?
*January 12, 2011*

**Math**

I am confused, do I separate the two first?
*January 12, 2011*

**geometry**

Triangle ABC, AB=8, BC=10, and AC=12, M is the midpoint of AB, and N is the midpoint of BC. What is the length of MN?
*January 1, 2011*

**science**

What is a way to put alloy and concentration into a sentence that helps to explain solutions?
*December 30, 2010*

**science**

What is a way to put alloy and concentration into a sentence that helps to explain solutions?
*December 30, 2010*

**Calculus**

The machine earns the company revenue at a continuous rate of 62000 t + 38000 dollars per year during the first six months of operation, and at the continuous rate of $69000 per year after the first six months. The cost of the machine is $170000. The interest rate is 5% per ...
*November 30, 2010*

**Physics**

When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.370 m/s2. Block 1 has mass M, block 2 has 5M, and block 3 has 5M. What is the coefficient of kinetic friction between block 2 and the table? block 1 is haging off the table ...
*November 18, 2010*

**physics**

The figure below shows an initially stationary block of mass m on a floor. A force of magnitude F = 0.570·mg is then applied at upward angle è = 22°. (a) What is the magnitude of the acceleration of the block across the floor if (a) ìs = 0.600 and &...
*November 18, 2010*