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October 25, 2014

Search: How to Calculate..

Number of results: 18,257

math
Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. 4(2+1) -------- 3(1)
September 17, 2013 by kasey

Chemistry
calculate q , w , and ∆ E for melting 1.00 mol of ice at 0 ◦ C and 1.00 atm pressure
September 22, 2013 by C

statistics
Calculate the difference between the means distribution parameters? where n1=25,n2=36, s2 1 = 50, s 2 2 = 72, M1= 100, & M2 = 105
September 27, 2013 by Anonymous

physics
Calculate the speed of an electron that is accelerated through the potential difference of 123 V.
October 12, 2013 by smita

Business math
Buy 2 pair of jeans at $8.99 each and get 3 free. Calculate the markdown percent
November 30, 2013 by Dawn

chemistry
calculate the number of calcium ions present in 11.1 grammes ofcalcuimchloride(1mole=6.02*10^23)
January 29, 2014 by De Noch

chemistry
calculate the heat needed at 0c each of the following joules to freeze 275gof water
January 29, 2014 by delana

Maths
Calculate the simple interest on R3 500 invested at 6% per annum for 3 years
February 9, 2014 by David

MATH
2BOYS:7GIRLS=5BOYS:?GIRLS OPTIONS ARE 24,25,124,15 PLEASE CALCULATE IT.
March 3, 2014 by N

gpc
Calculate the molarity of a bleach solution that is 8% by mass (m/v) or 8g/100mL sodium hypochlorite.
March 3, 2014 by samry

uta
the acidity constant of acetic acid is 1.8 x 10^-5. Calculate the % error of the measured Ka value of 1.82 x 10^-5
March 19, 2014 by Anonymous

Chemistry
Calculate the pH of the solution that results from mixing 30.0 mL of 0.050 M HCN(aq) with 70.0 mL of 0.030 M NaCN.
March 19, 2014 by Anonymous

chemistry
Calculate the concentration in % (m/m) of a solution containing 20.5 g of LiF dissolved in 340.0 g of H2O. a.1.14% (m/m) b.5.69% (m/m) c.6.03% (m/m) d.6.42% (m/m)
March 23, 2014 by julia

math
CALCULATE if 1/3of the candles are pink 3/8 are yellow and 1/4 is blue remaining 2 are white
March 24, 2014 by SAM

maths
A person runs 5/8 for race calculate what fraction is left show calculation
April 23, 2014 by mmmd

geometry
if a cone is 7.5 cm high and has a vertical angle of 70 degree calculate the diameter of its base.
May 16, 2014 by ryan

physics
Calculate the gravity on a planet using a pendulum that has a period of 2.45 s having a length of 1.25 m.
May 19, 2014 by Sam

chemistry
Calculate a value for the solubility of (NH4)2C2O4H2O in g/100 cm3 at 298 K
May 21, 2014 by Grace

chemistry
Calculate the molality of sulphuric acid solution in which mole fraction of water is .85
June 3, 2014 by swastika

chemistry
If you mix 50 grams of NaHCO3 in 2.0 liters of water, calculate molarity & molality
June 4, 2014 by Noah

Math
How do you calculate the surface area of a cylinder when the diameter is 15cm and the height it 10cm
June 12, 2014 by Annie

chemistry
calculate the moles of solute present in 1.25 centimeter cube of 0.5 M h3po4 solution
June 19, 2014 by hifsa

physical science (chemistry)
calculate the number of atoms in 50 dm3 nitrogen gas
August 18, 2014 by ndalama

physics
Calculate the distance Michael will travel if he maintain an average speed of 9.4 m/s for 2.2 seconds.
October 8, 2014 by anthony

physics
Calculate the distance Michael will travel if he maintain an average speed of 9.4 m/s for 2.2 seconds
October 9, 2014 by anthony

Chemistry
Calculate the fourth ionization energy of beryllium in J atom^-1 & kJ mol^-1 units
October 11, 2014 by Urvashi

chemistry
Calculate the concentration of iron(III) in 2.0 M of 9 ml HCL and 0.00050 M of 1 ml FeCl3? Please help me :(
October 12, 2014 by sreeja

CHEM
calculate the molality of a solution formed by dissolving 27.8g of LiI in 500mL of water
October 12, 2014 by Anonymous

Chemistry 30
Calculate the delta H for the reaction : 2H3BO3(aq) reacts with B2O3(solid) + 3H2O
October 13, 2014 by Logan

Retail Math
The buyer of women's gloves currently has an average inventory of $20500, with an annual turnover rate of 4.0. Because this rate of stock turn is below the industry average, a 7.82% increase in turnover is sought. Assuming a constant level of inventory, calculate the ...
October 29, 2006 by Alex

Chemistry
Magnesia (MgO) is used for fire brick, crucibles, and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3) at around 1200 oC. 1. Calculate the equilibrium pressure of CO2(g) (in atmospheres) above MgCO3(s) at 298 K. 2. Calculate ...
April 6, 2007 by Kegahn

PHYSICS--SHM
A pendulum consists of a uniform disk with radius r = 10 cm and mass 545 g attached to a uniform rod with length L = 500 mm and mass 300 g. (figure: one end of the rod attach to a pivot and the other end attach to the center of the disk) (a) Calculate the rotational inertia of...
January 27, 2007 by wooh

CHEMISTRY plz help
In the accompanying chart are appropriate vapor pressures for benzene and toluene at various temperatures: Temp (C) mmHg Temp (C) mmHg Benzene 30 120 Toluene 30 37 40 180 40 60 50 270 50 95 60 390 60 140 70 550 70 200 80 760 80 290 90 1010 90 405 100 1340 100 560 110 760 d. ...
October 17, 2013 by Aishwarya

Physics
1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN. ANS= MPa (Round to 3 decimal places) Diameter = 33.000mm = 0.033m 30.000kN = 30000N Area = pi*d^2/4 = 3.1416 * 0.033^2/ 4 = 3.1416 *0.001089/ 4 = 0.0034212024/ 4 = 8.553006*10^-4 = 0....
July 3, 2013 by Danny

chemistry
Solution A:50cm^3 of 1.0mol dm^-3 hydrochloric acid,HCl Solution B:10cm^3 of 2.0mol dm^-3 hydrochloric acid,HCl (a)Calculate the number of moles of hydrochloric acid,HCL in each solution. (b)Solution A and B are mixed together. (i)Calculate the number of moles of hydrochloric ...
May 7, 2014 by mandy

science
The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is 3.0 10 8 m s−1.) (i) Assuming the Hubble constant, H0, is 70 km s−1 Mpc−1 to two significant figures, calculate the distance to ...
August 22, 2011 by mj

physics
A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.25 s after liftoff, the rocket clears the top of its launch platform, 69 m above the ground. After an additional 4.80 s , it is 1.00 km above the ground. Calculate the magnitude of the ...
March 5, 2012 by aisha

Fianance
Jake is looking at refinancing his mortgages and paying off his credit cards at the same time. Currently, his debt situation is as follows: First mortgage: 6%, 30 years due 20xx (15 years left) $269,238 Second mortgage: 8%, interest only due in 15 years $80,000 Credit cards: ...
May 5, 2014 by Stephanie

Physics
A very narrow beam of white light is incident at 47.50 onto the top surface of a rectangular block of flint glass 13.6 cm thick. The indices of refraction of the glass for red and violet light are 1.649 and 1.678, respectively. 1. Calculate dispersion angle...Figured this out...
January 22, 2010 by Sarah

Chemistry
A student conducts an experiment to determine the enthalpy of neutralization for phosphoric acid reacting with sodium hydroxide. The student combines 25.0 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 C, in an open polystyrene ...
November 6, 2011 by Chen

Chemistry
A student conducts an experiment to determine the enthalpy of neutralization for phosphoric acid reacting with sodium hydroxide. The student combines 25.0 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 C, in an open polystyrene ...
November 6, 2011 by Chen

chemistry
a 205 mg sample of diprotic acid is dissolved in enough water to make 250 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hyrdoxide (Ksp=1.3*10^-6) is prepared by adding excess calcium hydroxide to water and then removing the undissovled solid ...
March 4, 2012 by cat

PHYSICS 6A centripetal acceleration
A jet pilot takes his aircraft in a vertical loop. If the jet is moving at a speed of 1100km/h at the lowest point of the loop: A)Determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 5.5g's B)Calculate the 68kg ...
May 9, 2012 by Daisy

Chemistry
(1)Aluminum reacts with oxygen to produce aluminum oxide according to the following reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) Calculate the moles of Al2O3 produced when the reaction is performed with 31.06 g of each reactant. (2)Nitrogen dioxide reacts with water to produce ...
March 6, 2013 by WCU cats

Chemistry
"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA mutations. The highest ...
September 13, 2012 by Travis

physics
Hi, I am confused about physics, more specifically force. I know that the formula for force is: f=ma So what if an object traveling at constant speed (acc equals zero) collides with a wall? How would you calculate the force, since there is no acceleration? There IS force upon ...
June 28, 2005 by Ashley

Chemistry
Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this process is carried ...
February 10, 2012 by Lauren

chemistry
Construct a galvanic (voltaic) cell from the half reactions shown below. Au3+ + 3 e- → Au (s) ξo= 1.420 V Br2 (l) + 2 e-→ 2 Br- (aq) ξo= 1.087 V Calculate the equilibrium constant (K) for this cell. Assume that the temperature is 298K. First, consider ...
May 2, 2014 by bekah

Physics
A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
June 29, 2012 by Tracy

Physics
A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
June 29, 2012 by Tracy

Physics
A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
June 29, 2012 by angela

chem
1. Calculate the heat (calories) produced by the solution of 3.75 g of NaOH Hint: Remember that the reaction is exothermic. 2. Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (ΔHsolnNaOH) For #1. delta H(solution)=deltaH(...
October 19, 2006 by Maria

Physics
A dc electric motor found in the lab was being examined by a student. It was connected to a power supply and it was not attached to any load. (a) The student stated, when the motor is switched on, the electrical energy input should cause the motor to start rotating, and the ...
August 31, 2009 by Alfred

physics
A particle of mass 0.350 kg is attached to the 100-cm mark of a meter stick of mass 0.175 kg. The meter stick rotates on a frictionless, horizontal table with an angular speed of 6.00 rad/s. (a) Calculate the angular momentum of the system when the stick is pivoted about an ...
October 22, 2012 by Karrine

Economics
. Consider total cost and total revenue given in the table below: QUANTITY 0 1 2 3 4 5 6 7 Total cost $8 $9 $10 $11 $13 $19 $27 $37 Total revenue 0 8 16 24 32 40 48 56 a. Calculate profit for each quantity. How much should the firm produce to maximize profit? b. Calculate ...
June 7, 2008 by SMsm

Economics
6. Consider total cost and total revenue given in the table below: QUANTITY 0 1 2 3 4 5 6 7 Total cost $8 $9 $10 $11 $13 $19 $27 $37 Total revenue 0 8 16 24 32 40 48 56 a. Calculate profit for each quantity. How much should the firm produce to maximize profit? b. Calculate ...
June 7, 2008 by SMsm

Economics
6. Consider total cost and total revenue given in the table below: QUANTITY 0 1 2 3 4 5 6 7 Total cost $8 $9 $10 $11 $13 $19 $27 $37 Total revenue 0 8 16 24 32 40 48 56 a. Calculate profit for each quantity. How much should the firm produce to maximize profit? b. Calculate ...
June 7, 2008 by SMsm

microeconomics
consider total cost and total revenue given in the table bellow: quantity total cost total revenue 0 $8 0 1 $9 8 2 $10 16 3 $11 24 4 $13 32 5 $19 40 6 $27 48 7 $37 56 a. Calculate profit for each quantity. How much should the firm produce to maximize profit? b. Calculate ...
January 26, 2009 by sara

chemistry
Using data from this chapter, calculate the change in energy expected for each of the following processes Rb(g) + Br(g) Rb+(g) + Br -(g)
December 7, 2007 by mel

ap chemistry
How can I calculate the exothermic lattice energy when all I am given is the compound formula LiF?
December 10, 2007 by Claudia

chem
delta T = Kf*molality Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass = grams. You know molality, kg solvent, and molar mass. Calculate grams. molar mass? where did u got the molar mass from ?
February 5, 2008 by Mark

Chemistry
Given the weight of phenacetin and its percentage yield...how would I calculate its melting point?
February 6, 2008 by Raj

physics
Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
April 2, 2008 by Jon

math
given that R= 2p(squared) divided by Q-3 1)Calculate the value of R when P=6 and Q=12. 2)rearrange the formula to make Q the subject.
April 7, 2008 by scott

Chem II
Calculate the pH and percent ionization for the solution made up of 0.035 M NH3 and 0.015 M NH4Br.
April 14, 2008 by Ken

chemistry
Calculate the current required to transfer 0.015 mols of electrons in a time of 20 min
April 22, 2008 by Priya

math
how to Calculate 30% of 40, and 25% of 20, then add the two results together? is the following correct 0.3 x 40 = 12 0.25 x 20 = 5 the total would be 12 + 5= 17
July 24, 2008 by Jennyv

chemistry
What is the balanced chemical equation for the reaction used to calculate of delta Hdagrees f of CaCO3(s)?
October 19, 2008 by Lilit***

college
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. a. ) -0.77 b. ) -0.83 c. ) -0.90 d. ) -0.98 e. ) -1.01 i got c
November 1, 2008 by A.A

Chemistry
Calculate ΔHrxn for the reaction 3 O2(g) ==> 2 O3(g) This is the information I am given: 2H2S(g) + SO2g) ==> 3S(s) + 2H2O(l)
December 10, 2008 by Chris

chemistry
Calculate the number of C, H, and O atoms in 4.50 g of glucose (C6H12O6), a sugar. okay i did it and i got just the C right and not the H and O help?
January 5, 2009 by lyne

chemistry
The pH of a 1.00 10-3 M solution of pyrrolidine is 10.82. Calculate Kb. i keep getting anumber that is ^ (positive) and thats way to big....
February 15, 2009 by Jennifer

AP Chemistry
In the titration of 50.0 mL of 1.0 M CH3NH2 (kb=4.4 x 10^-4), with 0.50 M HCl, calculate the pH a) after 50.0 mL of 0.50 M has been added b) at the stoichiometric point.
March 29, 2009 by some kid

chem
Calculate the root mean square speed (rms) for gaseous NH3 at 315 K
April 20, 2009 by Anonymous

Math
Can someone show me how to calculate the inner quartile range for the data set given? { 72, 80, 80, 82, 88, 90, 96}. Thanks.
July 29, 2009 by B.B.

Chemistry
How do I calculate how much sodium bicarbonate I need to neutralise 1L of 18M sulphuric acid?
August 30, 2009 by Gille

Chemistry
Consider the titration of 50.0 mL of 0.20 M NH3 (Kb = 1.8x10^-5) with 0.20 M HNO3. Calculate the pH after addition of 50.0 mL of the titrant.
October 7, 2009 by Anonymous

physics
Is it possible to calculate the torque acting on a rigid body without specifying the origin?
October 9, 2009 by tom

Chemistry
After 0.6523 g of is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.
October 13, 2009 by Jim

chemisrty
how can you calculate the net charge of an ion if you know the number of protons, neutrons, and electrons it contains?
November 4, 2009 by rica

Finance
Using the financial statements for the Goodyear Calendar Company, calculate the 13 basic ratios
November 12, 2009 by Tonie

math
Given the fuction y = log3(x+3)+2, calculate the zero of the function. GIve an exact answer.
December 12, 2009 by Cyn

science
Calculate the mass of SO3 gas that forms when 10g of SO2 reacts with oxygen
February 26, 2010 by Anonymous

chemistry
calculate the volume of 0.1M NaOH which must be added to 50 mL of 0.1M HCl to give a final solution of pH 6???
March 4, 2010 by sara

chem
calculate the pH for a solution that is made by combining 125ml of 6.0*10-2 M hydroflouric aid with 50 ml of .12 M sodium flouride?
March 4, 2010 by Nikki

Chemistry
Calculate the pH at 298K of solutions having the following ion concentrations? A. [H+]=1.0 x 10^-4M B. [H+]=5.8 X 10^-11M for A do you subtract 1.0 X 10^-14 from H+]=1.0 x 10^-4M
March 8, 2010 by Anonymous

personal finance
must calculate whether a couple should rent or buy a home.
March 11, 2010 by don

microeconomic
how to calculate price elasticity of demand of $3.00 to a increase to $3.50 and explain your reasoning and interpret the results
March 27, 2010 by susie quick

Chemistry
Calculate the percent by mass of water in magnesium sulfate heptahydrdrate (MgSO4-7H2O)
April 13, 2010 by Kim

Chemistry
Calculate the percent by mass of water in magnesium sulfate heptahydrdrate (MgSO4-7H2O)
April 13, 2010 by Kim

chem
Use this percentage to calculate the mass of fluorine in grams contained in 29.0 g of copper (II) fluoride
April 25, 2010 by melissa

College chemistry
How do you 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 amount of heat necessary ti raise the temperature of 8.5kg of water from 12.5 to 84 degrees C
May 4, 2010 by Quentin

College Chemistry
How do i calculate the pH when 200ml of .200M HCl is added .4998M of sodium acetate?
May 9, 2010 by Jim

College Chemistry
How do i calculate the pH when 200ml of .200M HCl is added .4998M of sodium acetate?
May 9, 2010 by Jim

Algebra 2/trig
How would I calculate the following function value? tan = 29degrees 36feet
May 15, 2010 by Brenna

Chemistry
Calculate (triangle H) for the complete combustion of 10.0g benzen. Equation? and could someone give me the answer?
May 20, 2010 by Anonymous

Maths
Please help, I need to calculate the gradient of a straight line that passes through the points (4,3) and (10,0)
July 8, 2010 by Just

chemistry
calculate volume of co2 produced by combustion of 40 ml of acetone in presence of excess oxygen?
August 8, 2010 by siddhant

calculus
Calculate the volume of the body which is obtained by rotating the curve y = ex 2px, 0  x  1 about the x-axis.
August 13, 2010 by Student

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