Friday

November 27, 2015
Number of results: 20,943

**swagodimo**

Calculate the number of moles of hcl(aq)added to sodium thiosulphate
*November 15, 2015 by peter*

**chemistry**

Calculate the energy difference for the transition of n=6 to n=2 for 1.00 mol of hydrogen atom?
*October 25, 2015 by gega*

**science**

Calculate 1A.U.if it takes 8,3 minutes for light to travel that far (c=300000 km/s)
*October 27, 2015 by Duncan fourie *

**Chemisty**

the Keq of Mg(OH)2 is 2(10^-11). calculate the concentration of Mg ions in a saturated solution of this compound
*November 19, 2015 by Julian*

**conversions**

How to calculate the square meters of a roll that is 30500 LF x 117" x 75 gauge
*November 20, 2015 by Kevin*

**phyics**

Calculate the specific gravity of a liquid given the following information: m = 59.30 g, mA = 33.78 g, mL = 43.60 g.
*November 23, 2015 by Kim*

**Chemistry, #7**

The pH of a 1.00 x 10^-3 M solution of pyrrolidine is 10.82. Calculate Kb. I know pyrrolidine is acidic because of the pH, and I know that tells me something about the Ka which in turn tells me something about the Kb. What does it tell me? Where should I begin this problem? Do...
*August 5, 2007 by Taasha*

**Chemistry**

I'm working on a problem that says: A 4.00 gram sample of a mixture of CaO and BaO is placed in a 1.00 L vessel containing Co2 at a pressure of 730 torr and a temperature of 25C. The CO2 reacts with the CaO and BaO forming CaCO3 and BaCO3. When the reaction is complete, the ...
*August 12, 2015 by Zara*

**Chemistry Lab **

I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the ...
*December 4, 2012 by Terry*

**Chemistry**

The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down to 4.0 m/s and then ...
*October 9, 2009 by Katherine*

**Bule hora preparatory school**

An ideal gas is sealed within a container at a tempreture of 17 degree celcies and a pressure of 101KPa. The container is heated until the tempreture of the gas reaches 100 degree celcies. A valve in the container is then opened to allow gas to escape until the pressure falls ...
*October 14, 2015 by Bilisuma hussein*

**chemistry**

Can you check what I did below? On the first problem, I am not sure if I am suppose to add a negative to the first part of the heat loss of water like so -[C(sp)m(w)deltaT(w)]. On the second problem, part(a), I am not sure if I am using the mass from the first problem, 135g, ...
*July 19, 2008 by Anonymous*

**Microeconomics**

A sporting goods store has estimated the demand curve for a popular brand of running shoes as a function of price. Use the diagram to answer the questions that follow. a. Calculate demand elasticity using the midpoint formula between points A and B, between points C and D, and...
*August 7, 2010 by Monica*

**chemistry**

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40m2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule. Calculate the diameter of an oil ...
*March 9, 2007 by angel*

**E.I.S.J**

An ideal gas is sealed within a container at a tempreture of 17 degree celcies and a pressure of 101KPa. The container is heated until the tempreture of the gas reaches 100 degree celcies. A valve in the container is then opened to allow gas to escape until the pressure falls ...
*October 31, 2015 by zizo breezy*

**statistics**

You randomly choose 16 unfurnished one-bedroom apartments from a large number of advertisements in your local newspaper. You calculate that their mean monthly rent is $613 and their standard deviation is $96. Does this SRS give good reason to believe that the mean rent of all ...
*November 19, 2013 by arshi*

**math**

You randomly choose 16 unfurnished one-bedroom apartments from a large number of advertisements in your local newspaper. You calculate that their mean monthly rent is $613 and their standard deviation is $96. Does this SRS give good reason to believe that the mean rent of all ...
*November 19, 2013 by arshi*

**CHEMISTRY**

You mix 40.0 g of ethanol (C2H5OH, molecular weight = 46.1 g/mol) and 60.0 g of water (molecular weight = 18.0 g/mol) The resulting solution has a density of 920 g/L. a)Calculate the molarity of ethanol in this solution? Answer : 0.06 kg of H2O This is correct. b) At what ...
*March 18, 2012 by Jen*

**A2 Chemistry**

This question is about the unnecessary production of carbon dioxide Outdoor flames, such as patio heaters and the Olympic flame, contribute to global warming. This is not only due to the heat released, but also due to the carbon dioxide produced from the combustion of ...
*February 11, 2013 by Chris*

**Physics**

The bacterium Escherichia coli (or E. coli) is a single-celled organism that lives in the gut of healthy humans and animals. When grown in a uniform medium rich in salts and amino acids, these bacteria swim along zig-zag paths at a constant speed of 20 um/s. The figure shows ...
*September 11, 2012 by Cassie*

**Chemistry**

I have a few question for my review. 1) How would you prepare 30.0 ml of 0.600M HNO3 From a stock solution of 4.00M HNO3? What volume in ML of the 4.00 M HNo3 will you need? 2) if a 83.5 & was repoarted for a reaction that could have produced 12.1 g of product? what was the ...
*October 10, 2013 by Matt*

**PHYSICS**

A nuclear reactor contains nuclei that fission when bombarded by slow neutrons. The fission reaction produces fast neutrons which need to be moderated (i.e. slowed down) in collisions before they can cause further fissions. In this problem we consider a reactor which uses ...
*March 28, 2011 by Megan*

**Physics- drwls please help**

(a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 9.33 109 J. (...
*March 28, 2007 by Jim*

**Chemistry**

An element has bcc packing with a body-centered cubic unit cell. Its density is 19300 kg/m3 and the unit cell volume is 3.17 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures. The element rubidium has bcc packing with a body-centered cubic...
*February 8, 2010 by Dan*

**Chemistry**

I am stuggling with my chemistry experiment. I am given thr following: The reaction of citric acid and sodium bicarbonate is written as H3C6H5O7(aq) + 3NaHCO3(aq) --> Na3C6H5O7(aq) + 3H2O(l) + 3CO2(g) 1.) Mass of cup A, water, and stirrer = 54.3 g 2.) Mass of sodium ...
*November 7, 2012 by Bailey*

**Chemistry (please help me!)**

H2(g) + CO2(g)<-> H20(g) + CO(g) When H2(g) is mixed with CO2(g) at 2,000K, equilibrium is achieved according to the equation above. In one experiment, the following equilibrium concentrations were measured: [H2]=0.20 M [CO2]=0.30 M [H2O]=[CO]=0.55M a) What is the mole ...
*February 25, 2007 by sara*

**chemistry**

Calculate the pH from the addition of 10 mL of a 0.10 M NaOH solution to 90 mL of 0.10 M HCl. okay so i understand how to do most of it but i get messed up at one part.. so i made my equation: NaOH + HCl -> H2O + NaCl (strong base, strong acid= complete dissociation) so net...
*November 8, 2011 by BOB PLEASE HELP!:)*

**Math**

The speedometer of John's truck uses the revolutions of his tires to calculate the speed of the truck. How many revolutions per minute do the tires make when the truck is traveling at 55 miles per hour? (picture with tires with diameter of 26 in.) Suppose John buys tires with ...
*May 11, 2011 by Gabi*

**PLEASE HELP!**

A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. It is given that a particular small car, with a mass of 1110 kg, can ...
*October 1, 2006 by Haley*

**Chemistry**

I am a bit lost as to how to go about answering this question. Any help will be appreciated. When 1.40g of hydrated magnesium sulphate is heated to constant mass, 0.68g of the anhydrous salt remains. Find the formula for the hydrated magnesium sulphate. Write the balanced ...
*March 21, 2007 by Nona*

**Finance**

2.Calculate the growth rate of Asset J dividends, we have to assume that future dividend payments will grow at a constant rate into the future forever. This constant rate can be estimated by calculating the average growth rate from the past dividends. Calculate Asset J’s ...
*September 19, 2014 by no name*

**Geometry**

Within an orthonormal system consider points A(1,4) B(5,1) C(4,8) (a)Calculate the angle ABC (b)Show that 3x+4y-19=0 is an equation for line L which passes through A and B (c)Find a vector equation for line L (d)(i)give an equation for the circle with the line segment AB as ...
*May 4, 2008 by Anonymous*

**Physics - Quidditch**

A light rope passing over a frictionless pulley connects two objects. One object has a mass of 10kg. The tension in the rope is 90N. Calculate the acceleration and the mass of the second object. Object 1 Fg-Ft = ma 100 - 90 - 10*a 10/10 = a a = 1m/s^2 Object 2 Ft-Fg = ma 90-...
*April 2, 2008 by Alex*

**Math 141**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*March 27, 2012 by Sherry*

**CTU**

Part IV: You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that ...
*August 13, 2012 by Johjoh*

**computer science**

Can you find the reason that the following pseudocode function does not return the value indicated in the comments? // The calcDiscountPrice function accepts an item’s price and // the discount percentage as arguments. It use those // values to calculate and return the ...
*November 21, 2012 by Terry*

**College (Enthalpy) - College**

S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic) Our goal is to calculate the enthalpy change for the ...
*October 31, 2010 by Lucy*

**math**

In a factory of electronic items, the total cost of production, expressed in thousands of dollars, is given by the function C(x)= (x^2-x+2)/x+1 where x belongs to [0;5] and expressed in hundrends of items produced. 1) calculate in dollars the total cost of production of 400 ...
*January 1, 2011 by Jessy*

**Physics**

3) a) Calculate the unstretched length of a spring, which has a Hooke's constant of 40N/m and is 56cm long when supporting a stationary 800g object. I did mag = kx (0.800)(9.81) = 40x x = 0.20m l-x = u 56-20 = u u = 36cm Is that right? b) The period with which the object would...
*May 19, 2008 by Alex*

**mechanics**

Use a sketch to illustrate what cantilever bending is and give an everyday example of it. (b) use a sketch to illustrate what three-point bending is and give an everyday example of it. (c) For each of the two beams shown below: (i) calculate the maximum magnitude of the ...
*February 24, 2013 by dmkp*

**physics HELP!!**

3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...
*February 20, 2007 by Katrina*

**Programming**

1.Do the planning and write an algorithm to solve the following problem. Prepare test data for the example to test all possibilities and draw a trace table. Sam works at a coffee company where all the employees receive a bonus of R700, except the employees in the coffee ...
*March 30, 2015 by Anonymous*

**Algebra**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*December 15, 2011 by Kimberly*

**Algebra**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*December 15, 2011 by Kimberly*

**Math 157**

I am having some trouble figuring out these two problems. 1. Calculate the mean, median, mode, range, and midrange for the data set given {-1, 7, 0, 14, -2, -15, 0, 8, 7} Mean=2 Median=7 Mode=0, and 7 Range= Midrange= 2. Calculate the mean, range, variance, standard deviation...
*August 7, 2010 by Rayna *

**math**

how doyou calculate mass The problem begs for details: Are you working with density?
*August 29, 2006 by tamika*

**cultural diversity**

describe other measurements sociologists use to calculate prejudice?
*September 28, 2007 by shashana*

**chemistry**

At 25C, Kc= 3.7x10^9 for the reaction CO(g) + Cl2(g) equilibrium with COCl2(g) Calculate the Kp at this temperature.
*October 9, 2007 by Wolf*

**chemistry**

calculate the mass of sodium hydroxide needed to prepare 500 mL of a 0.10 M solution.
*October 14, 2007 by Rebecca*

**physical science**

How do you calculate the heat generated from dropping a metal ball from heights?
*November 21, 2007 by Scott*

**Math**

What is the method used to calculate depreciation for federal income taxes(USA)?
*November 27, 2007 by Alarena*

**Economics**

What is the formula for CPI consumer price index? and how it is use to calculate prices?
*January 31, 2008 by Tim*

**Economics**

How to calculate the CPI for expenditures? Given: 2001 $645 2002 $545
*February 1, 2008 by DV*

**Chemistry**

What is the total moles of ions in 500 mL of 0.120 M Ca(NO3)2? how would i calculate this? thanks.
*February 3, 2008 by Sean*

**Math**

Is there a mathematical formula to calculate this easily? 1 x 2 x 3 x 4 x 5...50 I know it's not an arithmetic/geometric series because that means 1 + 2 + 3 + 4 + 5...50
*February 4, 2008 by Anonymous*

**chemistry**

Given the following solubilities, calculate the value of the Ksp for Copper(II) Sulfide, 8.89 x 10^-19
*March 31, 2008 by Jessica*

**chemistry**

Calculate the pH of the following aqueous solution: 1.00 mol/L sulfuric acid, H2SO4(aq)
*April 5, 2008 by Bradely*

**math**

Given that y varies inversely as x, use the values of x and y from the following to calculate the value of a. x 2 32 y 8 A
*April 7, 2008 by joe*

**Chemistry**

Calculate the maximum concentrations of Pb+ that can exist in 3.0 x 10(-2)M Na2SO4 without forming a precipitate.
*April 7, 2008 by Natasha*

**chemistry**

Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent?
*June 1, 2008 by Anonymous*

**chemistry**

Calculate the concentration of a silver ion when the solubility product constant of AgI is 10^-16
*August 4, 2008 by kayla*

**9th grade**

How do you calculate the velocity of a quarter dropped from a tower after 10 seconds?
*October 5, 2008 by Layla*

**Science**

how do you calculate the average velocity of a quarter dropped from a tower after 10 seconds?
*October 5, 2008 by Layla*

**chemisty**

Calculate the density of oxygen,O2 , under each of the following conditions: 1- STP 2- 1.00 atm and 35.0 C
*October 8, 2008 by unknown*

**lAM**

Calculate the density of oxygen, , under each of the following conditions: STP 1.00 atm and 25.0 C
*October 13, 2008 by gerry*

**chemistry**

calculate the number of Mg2+ ions in each mL of 0.162M(molarity) magnesium bromide
*October 26, 2008 by ben*

**Chemistry**

Calculate the pH of concentrated hydrochloric acid if this solution is 24.8 % HCl by weight and has a density of 1.16 g/mL.
*November 1, 2008 by A.A*

**Chemistry**

Calculate the heat released when 25.0 grams of water freezes at 0 degrees celsius.
*December 28, 2008 by Completely Lost*

**chem**

Calculate the molar mass of K2[Cu(C2O4)2]*2H2O I got 353.81 is this correct ?
*January 31, 2009 by anna*

**Physics**

An electromagnetic radiation has a frequency of 5.00 X 10^14 Hz. Calculate its wavelength in a vacuum in metres and nanomatres?
*March 28, 2009 by Sarah*

**College Chem**

Calculate the total number of electrons that can be present in the principal level for which n = 4.
*April 15, 2009 by Justyna*

**Math**

a sequence {an} is given by a1 = (3)^1/2 , an+1 = (3+an)^1/2. Show that {an} is monotonic and bounded, and calculate the limit if it exists
*July 7, 2009 by Hannah*

**Chemistry**

I am sooo confused on how to solve this problem, can anyone help me understand? calculate the pH of 0.10 M HCI solution?
*October 1, 2009 by Jessica*

**chemistry**

Calculate q in J when 2.02 g of ice is cooled from -22.6°C to -73.8°C (cice = 2.087 J/g·K). Do not add units to your answer.
*October 12, 2009 by Sheena*

**chemistry**

A laboratory test tube is 12.5 cm long and 2.50 cm in diameter. Calculate the volume of the capacity in mL
*October 21, 2009 by **steph***

**physics 8th grade**

If a woman hasa mass of 50 kg calculate her weight in neutons
*October 28, 2009 by jim*

**physics**

how do you calculate the frequency of a 2.500 m long pendulum in Quito, Ecuador, where g= 9.780 m/s^2
*November 30, 2009 by abbigail*

**university of phoenix**

describe other measurements sociologists use to calculate prejudice
*December 18, 2009 by lori*

**Math**

A triangle has side lengths of 172m, 155m, and 200m. calculate the area.
*January 10, 2010 by Becka*

**science**

calculate the force it would take to accelerate a 650-kg vehicle at a rate of 3 m/s2.
*January 25, 2010 by poohbear*

**Statistics**

Formula used to calculate confidence interval..please give example. Thanks
*January 26, 2010 by Bryant*

**chemistry**

Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent?
*January 26, 2010 by tonette*

**chemsitry**

calculate the work done when 50.0 g of tin dissolves in excess acid at 1.00 atm and 25c
*February 14, 2010 by Anonymous*

**Chemistry**

How do i calculate the amount of heat required to raise the temperature of an 89 sample of water from 40 to 60.
*February 20, 2010 by Kesha*

**physics**

newyorks 33-m tower oscilatesnin the wind with a period of 6.80s calculate the frequency
*February 21, 2010 by aa*

**chem**

Calculate the pH of the following salt solutions? 0.1 M HBr 0.1 M CaI2 0.1 BaF2 Kb (F-)=1.4x10^-11
*March 1, 2010 by simi*

**Econ**

How do you calculate the growth rate of real GDP between two years?
*March 5, 2010 by Rach*

**Economics**

How do you calculate the growth rate of real GDP between two years?
*March 5, 2010 by Rach*

**Chemistry**

Calculate the pOH and pH at 298K of soloutions having the following ion concentrations A.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X 10^-2
*March 8, 2010 by Anonymous*

**Chemistry**

Calculate the pOH and pH at 298K of solutions having the following ion concentrations A.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X 10^-2
*March 8, 2010 by Anonymous*

**Chemistry**

Calculate the [h3o+] of the following polyprotic acid solution: 0.135 M H2CO3
*March 25, 2010 by Krysten*

**chemistry**

how do we calculate bond order of a molecule that has 3 different elements, like for example C-N-O
*April 8, 2010 by phys*

**chemistry**

Calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.
*April 26, 2010 by laney*

**Chemistry**

Calculate the density of carbon dioxide gas at 253K and 648 torr.
*May 2, 2010 by Anonymous*

**Physics**

calculate the force between two identical charges of 1.0 x 10 exp -9 C separated by 1.0 Cm
*May 10, 2010 by Nina*

**chemistry**

for Fe + V2O3 -----> Fe2O3 + VO write the two half reactions and calculate voltage
*May 12, 2010 by Anna*

**college**

how do you calculate molar concentration for 1.50g NaCl in 100.00mL of solution?
*May 17, 2010 by bernadette *

**account**

How would we calculate the gain or loss from the sale of equipment? Can you provide an example?
*May 30, 2010 by lola*

**physics**

calculate the total area of the walls of a room 5m long 4m wide and 2.5m high
*June 9, 2010 by romardo*

**Physics**

How do you calculate error analysis? For example; 200 +- 5% Please explain if possible
*June 13, 2010 by 3i*