Thursday

August 28, 2014

August 28, 2014

Number of results: 17,734

**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 ΔHºrxn 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*

**Math**

How would I calculate the area of a sector of a circle with radius 2 m that subtends an angle pi/3
*August 14, 2010 by Dave*

**chemistry**

Calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25C
*September 5, 2010 by Dana*

**Physical chemistry**

Calculate the pressure exerted by 1.0 mol C2H6 behaving as a perfect gas
*September 13, 2010 by Melissa*

**biochemistry**

How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium lactate?
*September 18, 2010 by nicki*

**Science**

A horse with a force of 50 N pulls a cart of wood a distance of 10 m. Calculate the amount of work done.
*October 6, 2010 by George perez*

**chemistry**

I need to calculate the density, with work shown. 50.0 mg of a gas which occupies a volume of 0.0064 L ?
*October 7, 2010 by alisha*

**physics**

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
*October 8, 2010 by Bolo*

**Physics**

Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
*October 13, 2010 by Tamara*

**statistics**

Sample size is 24, Mean rate of 6.50%, Standard Deviation is 1.20. Calculate 90% of confidence interval
*October 14, 2010 by sue*

**CHEMISTRY**

calculate the number of moles of solute present in 124.0g of a solution that is 6.45% glucose by mass.
*October 14, 2010 by lulu*

**physics**

calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour
*October 18, 2010 by Anonymous*

**geometry**

Calculate the volume of the figure shown. a = 8 and b = 12. Use 3.14 for pi and round answer to the nearest tenth
*March 28, 2011 by BreAnna*

**Calculus**

Use Newton's Method with the function f(x)=x^2-2 and initial value Xo=2 to calculate x1,x2,x3. I have no idea how to do this
*October 27, 2010 by Don*

**chem**

calculate the molality of a solution that has 1.02kg sucrose (C12H22O11), dissolved in 554g water.
*October 27, 2010 by julia*

**PHYSICS**

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
*October 29, 2010 by Mattie*

**Physics**

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
*October 31, 2010 by Lisa*

**UW River Falls**

Calculate the enthalpy change, , for the process in which 40.0 of water is converted from liquid at 12.8 to vapor at 25.0.
*November 5, 2010 by Anonymous*

**chemistry **

Calculate the frequency of electromagnetic radiation emitted by the hydrogen atom in the electron transition from n = 7 to n = 6.
*November 7, 2010 by Emily *

**Chem 110 **

Calculate amount of milliliters of 2.0 M HCl needed to neutralize 0.15 mol of NaOH
*November 8, 2010 by Matilda *

**sociology**

Describe other measurements besides IAT sociologist utilize to calculate prejudice?
*November 14, 2010 by Shantai*

**chemistry**

calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=5 to n=1 how do I do this?
*November 21, 2010 by Lisa*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. calculate its Ksp.
*November 29, 2010 by Al*

**Chemistry**

Calculate the concentration of the solution in mass percent: 122 g KCl in 628 g H2O.
*November 30, 2010 by Kelsey G*

**Chemistry**

calculate the percent composition, by mass, of carbon in Na2CO3. please explain how you get the answer.
*January 2, 2011 by denise*

**Chemistry (acids and bases)**

Calculate pH, pOH, [H+], [OH-], and Ka for a 0.026 M solution of HI (a strong acid). Please help me :(
*January 7, 2011 by Marie*

**physics**

How can I calculate exactly where a marble will drop if it is rolling of a table with very little friction??
*January 8, 2011 by lia*

**Statistic**

Calculations please, Calculate the first, second, and third quartiles of the following samples. 5 8 2 9 5 3 7 4 2 7 4 10 4 3 5 23
*January 31, 2011 by Delisha*

**chemistry**

Calculate the mass in grams for a gold sample that absorbs 225 to change its temperature from 16.0 to 36.0.
*February 3, 2011 by Heather*

**Chemistry**

Calculate the amount of Citric acid monohydrate needed to make 100 mL of 0.1 M solution
*February 7, 2011 by Emily*

**Math**

Given that f(x) = a log x for some constant a, and that f(7) 5:282, determine the value of a and calculate f(13) to 3 decimals.
*February 10, 2011 by Diane*

**Geometry**

Describe the information you need in order to calculate a segment length in a right triangle
*February 11, 2011 by Jonathon*

**chemistry**

Calculate the empirical formula of each compound from the mass-composition data given below. A)41%N and 59%O B)45%Na,23%P and 32%O
*February 13, 2011 by twynna*

**chemistry**

Calculate the number of moles and atoms. A)64 gm of O2 B)58.9 gm of CI C)90.5gm of (HN4)2SO4 D)243gm of Mg2
*February 13, 2011 by twynna*

**geometry**

An object is made from a cylinder with a hemisphere at each end.r=5cm, height=12 .Calculate volume.
*February 16, 2011 by reshma*

**Chemistry**

Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl
*February 21, 2011 by Joshua*

**Chemistry**

Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl
*February 21, 2011 by Joshua*

**Physics**

Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J. Answer in units of m/s.
*February 27, 2011 by James*

**Chemistry**

Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.
*March 2, 2011 by Dan*

**Chemistry**

Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.
*March 2, 2011 by Dan*

**chemistry**

calculate the mass of water produced when 3 g HCL reacts with excess sodium carbonate
*March 3, 2011 by joe*

**Physics**

Calculate the distance (in km)that Larry runs if he maintains an average speed of 8km/hr for 45 minutes.
*March 5, 2011 by Roger*

**chemistry 32**

Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl
*March 10, 2011 by Adrian*

**chemistry**

Calculate the mass of kl in grams required to prepare 5.00x10power 2mL of 2.80M solution
*March 11, 2011 by lisa*

**chemistry**

Calculate the molar solubility of in the following substances. Pure water and 1.5×10−3 K2CrO4
*March 14, 2011 by Bob*

**chemistry**

calculate the volume of water in mL needed to make 75% solution containing 50g of CaCl2
*March 15, 2011 by Quinne*

**Chemisrty**

calculate the final Celsuis Temp when 5.0 L of Flourine gas at 50 is cooled to give a volume of 3.75?
*March 24, 2011 by Dee*

** chemistry**

Calculate each of the following quantities in 0.183 mole {\rm (C_3H_5)_2O}: Find the Atoms of H and C
*April 3, 2011 by Ivy*

**maths**

in a triangle ABC, C=10CM A=12CM ANGLE B Is 20 DEGREEZ calculate the lenght of side b
*April 13, 2011 by anjai*

**science**

Calculate the amount of potential energy a 3 kg can of paint has when it is placed on top of a ladder that is 2.5 m in height 1.2j ?
*May 5, 2011 by Anonymous*

**Chemistry**

how do you calculate the quantity of heat gained or lost? 0.60 mol of steam condenses at 100°C
*May 25, 2011 by Emily*

**Chemistry practice**

Calculate using the enthaly of formation,the enthalpy of combustion of methanol,CH3OH
*July 31, 2011 by Gift*

**math**

$3,000 at 8% for 30 years (a) Calculate the future amount if the money were invested at simple interest
*August 23, 2011 by apryl*

**Maths**

May I please have help with this Calculate the following numbers into scientific notation 2500 nm – 7 pm
*September 5, 2011 by Anonymous*

**chemistry**

Calculate the decrease in temperature in degree Celsius for 115g of copper that loses 2.54kJ
*September 7, 2011 by Sarah*

**physics**

calculate the work done in lifting a 300N weight to a height of 10 m with an acceleration 0.5m/second square.
*September 12, 2011 by gallium*

**physics**

calculate the work done in lifting a 300N weight to a height of 10m with an acceleration 0.5 m/s square.
*September 13, 2011 by armando*

**Maths**

Sketched are the graphs of f(x)+x squared +4x-12,calculate the lenght of rs if s is the turning point of the para bola
*September 15, 2011 by Sphiwe*

**Chemistry**

Calculate the percent composition by mass of each element in Al(OH)3 Use at least 3 significant figures. %Al = %O = %H=
*September 18, 2011 by Jerry*

**physics**

Calculate the amount work done on 60 N of force is used to move an object a distance of 4.0 meters
*September 20, 2011 by Joe Barrera*

**chemistry**

Calculate the final temperature of 289 of water initially at 35 upon absorption of 20 of heat.
*October 7, 2011 by jasmin*

**chem 12**

Calculate [H3O] an [OH] for a sodium hydroxide solution having a pH of 12.5. I know this is a strong base, and i got the pH 12.5. But i don't know how to go from there.
*October 11, 2011 by Sarah*

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