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December 21, 2014

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Number of results: 18,736

chemistry
Calculate the mass in grams of 2.50 mol iron(II) hydroxide. A. 29.5 g Fe(OH)2 B. 184.5 g Fe(OH)2 C. 225 g Fe(OH)2 D. 3.38 x 10-2 g Fe(OH)2 C
November 11, 2012 by Cathy

business statistics
Assume that X is a binomial random variable with n = 5 and p = 0.35. Calculate the following probabilities?
November 14, 2012 by Alicia

Chem help
Calculate the pH of a solution containing 0.00001 moles of H3O per liter.
November 16, 2012 by Lindsey

chemistry
Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091*10^6 g/mol.
January 1, 2013 by cristie

Chemistry
Calculate the mass concentration of H2SO4 in a solution of 36%, with density 1.84g/cm3
January 20, 2013 by Anonymous

Physics
Calculate the average speed of the car in km/h, it can accelerate from 96.56 km/hr in 4.3 seconds. Distance is not provided
February 13, 2013 by Sev

chemistry
If 22.4 dm3 of steam react with MgO, calculate the mass of the product that will form.
February 18, 2013 by Chelsea

Chemistry
Calculate the density a gas will have at STP if its molar mass is 41.8 g/mol.
February 19, 2013 by Bay

chemistry
Calculate the amount of zirconium produced (in kg) if a reactor were charged with 261.0 kg ZrCl4 and 25.0 kg Na .
February 21, 2013 by mariam

Chemistry
Calculate the volume in liters of the gas (O2) at STP if it was massed at 6.75 x 105 grams.
February 24, 2013 by tif

Chemistry
calculate the amount of energy required to vaporize 43.0g of water at its boiling point
February 28, 2013 by Richie

general chemistry
Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution
March 7, 2013 by kelia

Chemistry
The Ksp of magnesium hydroxide, Mg(OH)2, is 5.61 10^-12. Calculate the molar solubility of this compound. Is the answer 1.1*10^-4 M?
March 16, 2013 by Anon

Chemistry
7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
March 20, 2013 by Nick

Chemistry
7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
March 20, 2013 by Nick

Statistics
Use this information to calculate the mean and standard deviation of this random variable. P(x)- .25, .05, .55, .15
March 26, 2013 by Bill

science
a guitar string is 75cm long,calculate the wavelength of its fundamental note
March 29, 2013 by ebere

science
Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).
April 2, 2013 by annie

chemistry
Calculate the new molarity when 150 mL of water is added to 125 mL of 8.55 M HBr.
April 2, 2013 by Alex

chemisty
Calculate the volume of 4.0ml of nitogen gas at 754mmhg and 25 degrees celcius
April 8, 2013 by zane

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013 by Karen

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013 by Karen

chem
calculate the concentration of all ions present in 58.7 mg NH4Br in 500 mL of solution
April 11, 2013 by celine

chemistry
Calculate and record the average molar heat of reaction from the three results.
April 16, 2013 by Anonymous

chemistry
A gas absorbs 25kj of heat and does 12kj of work calculate (triangle) E
April 16, 2013 by S

Chemistry
Calculate the standard potential, E^o, for this reaction from its equilibrium constant at 298K. X(s)+Y^2+(aq)= X^2+(aq)+Y(s) K=8.68E6 E^o=??V
April 17, 2013 by Help

CHEMISRTY
Calculate the energy required to raise the temperature of 160.0 g Ag from 273 K to 295 K.
April 21, 2013 by Tonya

physics
For the vectors in the figure below, with a = 8, b = 7, and c = 113, calculate the following dot products.
April 25, 2013 by tae

Math
Use Excels PMT function to calculate the monthly mortgage payment
May 2, 2013 by jane

Chemistry II
Calculate the pH at the equivalence point in the titration of 50ml of 0.20 M methylamine (Kb=4.3*10^-4) with a 0.40 M HCL solution.
May 3, 2013 by Katie

chemistry
Calculate the concentration of each solute and each ions when 25.0 mL of 18.0 M H2SO4 is mixed with 130.0 mL water
May 6, 2013 by Anonymous

chemistry
calculate the degree of polymerization of polystyrene with a molecular weight of 3.091e6 gm/mol
May 7, 2013 by himani.

Physics
Calculate the power of a hair dryer that operates on 120V and draws a current of 10 A.
May 12, 2013 by jamya

math
calculate the compound interest on investing $600 for 2 years at 7% per annum
May 17, 2013 by lennox

Chemistry
If 50 mL of a saturated solution of KClO3 at 55C is cooled to 15C, calculate the mass of precipitate that will form
May 20, 2013 by LOL

Chemistry
Calculate the grammes of oxygen which would involved on heating 5g of potassium trioxochlorate(v)
May 21, 2013 by Nkpume

Chemistry
Calculate the grammes of oxygen which would involved on heating 5g of potassium trioxochlorate(v)
May 21, 2013 by Nkpume

Chemistry 101
calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a height of 6.6 .
June 3, 2013 by Lisa Jacobs

Chemistry 101
calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a height of 6.6 .
June 3, 2013 by Lisa Jacobs

Science
Calculate the average size of the microbes in Saccharomyces ? show your working out.
June 13, 2013 by Tiaamiiah

maths
calculate the volume occupied by 5.25 gram of nitrogen at 26 degree Celsius and 74.2 cm of pressure
June 23, 2013 by deepu

keith
drop a ball from a height of 1.5 meters. Calculate its seed when it hits the floor
June 27, 2013 by aaron

Math
Calculate the length of the path over the given interval: (sin6t, cos6t), 0<t<pi
August 6, 2013 by Ali

Math
Calculate the length of the path over the given interval: (sin6t, cos6t), 0<t<pi
August 7, 2013 by Ali

Chemistry(science)
Calculate number of moles and mlecules present in 0.032 mg of mithene (C=12 H=1)
August 12, 2013 by Rohan

matla
4.6 g of an oxide of nitrogen contains 3.2 g of oxygen. Calculate the empirical formula of the compound.
September 7, 2013 by kevin

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

chemistry
Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.
October 26, 2014 by lala

chemistry
Calculate the pressure, in atmospheres, of 0.0495 mol of a gas in a 0.379 L flask at 23. oC.
October 31, 2014 by Shatoya

organic biochemistry
Calculate the number of moles of ZnCl2, in 100. mL of 0.600M solution.
November 5, 2014 by hannah

physics
Calculate the momentum of a 0.1 kg rifle bullet traveling 500 m/s. Answer in units of kgm/s
November 13, 2014 by Ethan

chemistry
2.15 g of a substance X contain 4.34 x 1022 molecules of X. Calculate the molar mass of X in g/mol.
November 16, 2014 by michelle

Government day
Calculate the area of rectangle 3.85m long and 2.37m wide
November 17, 2014 by Seun

Chemistry
Show how to calculate the molarity of 45 g of hcl in 1.5 L of water 36.46g/mol/1.5=24.30726Mhcl
December 2, 2014 by ff

Chemistry
A gas occupies 21.0 L at 2.00 atm pressure and 27oC. Calculate its volume at STP.
December 12, 2014 by Sam

Chemisty
calculate the concentration of the solution of 6.4g calcium sulafte is added to 0.125l of water
December 18, 2014 by EFonts

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

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