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April 20, 2014

Search: calculate the mass of solid NaOH needed to make 200.mL of a 0.600M NaOH solution

Number of results: 59,049

Physics
A solid of mass 400g in air and when partly is immersed in a certain liquid it has a mass 320g. Given that the relative density is 0.8. Calculate the volume of the solid immersed in the liquid.
Sunday, January 16, 2011 at 9:11am by Asamoah

physics
A particular trophy has a solid 0.2m radius base with a mass of 1.2kg. Rising up from the center is a 0.01m radius solid rod with a mass of 0.4kg. Centered on top of this is a hollow sphere with a radius of 0.15m and a mass of 0.8kg. Calculate the total moment of inertia for ...
Tuesday, October 16, 2012 at 11:41pm by taryn

chemistry
a mixture containing only sodium chloride and potassium chloride has a mass of 4 g. when this sample is dissolved in water and excess silver nitrate is added a white solid forms. after filreation and drying the solid silver chloride has the mass of 8.5904g. calculate the mass ...
Saturday, September 25, 2010 at 2:18pm by kelly

chemistry
to find the molarity of an aqueous solution of an ionic solid what do you need to know? a... mass of solid, formula of solid, volume of water b...moles of solid, formula of solid, volume of water c....mass of solid, formula of solid, volume of solution d....moles of solid, ...
Tuesday, November 30, 2010 at 3:37pm by Anna

chem
given the mass of the original sample and the mass of the solid chloride produced, how do you calculate the mass of the matal in the unknown?
Tuesday, April 15, 2008 at 6:18pm by ashley

Chemistry 3A
calculate the mass of solid NaCl that must be added to 1.50L of a 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl. calculate the mass of AgCl formed.
Monday, December 10, 2012 at 9:39pm by Gurjot

chemistry 1A
If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid
Tuesday, November 2, 2010 at 12:45pm by Jake

College Chemistry
Nicole--You persist in using symbols and defining them. IF 32.85 is grams of the solid (I don't what the garbage is) and 0.864 is density in g/mL, then 58.56 g = mass solid + mass toluene 32.85 g = mass solid _________ 25.71 g = mass toluene used. volume of toluene = mass/...
Monday, January 24, 2011 at 9:30pm by DrBob222

Math
a 25.00 gram sample is placed in a graduated cylinder and then the cylinder is filled to the 50.0 mL mark with benzene. the mass of benzene and solid together is 58.80 gram. assuming that the solid is insoluble in benzene and that the density of benzene is .880 g/cm^3 , ...
Monday, August 23, 2010 at 1:49am by Anne

Physical Science
How do you calculate the mass and volume of an irregular solid object and calculate the density of that object?
Sunday, January 25, 2009 at 8:05pm by Alex

Physics
A uniform solid cylinder of mass M = 6 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy
Saturday, June 9, 2012 at 4:29pm by Cyrus

physics
A yo-yo is made of two solid cylindrical disks, each of mass 0.053 kg and diameter 0.073 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0052 kg and diameter 0.012 m. Use conservation of energy to calculate the linear speed of the yo-yo when it reaches the end...
Monday, November 29, 2010 at 2:05am by Sasha

Physics
Calculate the Patm And the pressure exerted by water on the block - The area Of the upper face of block is 40 cm2 Calculate the total pressure exerted on the solid Given : In the first tube : in a tube a solid .. the height from solid to the water level in the tube is 8o cm & ...
Friday, April 23, 2010 at 11:35am by Nana

physics
"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and ...
Friday, April 1, 2011 at 2:41pm by Seth

physics
"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and reach...
Sunday, April 3, 2011 at 1:52am by Seth

Chemistry
A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was observed. Find the mass of ...
Wednesday, March 19, 2014 at 5:59pm by Anonymous

matter
What are the three properties of matter and how is matter measured? volume, weight, and mass the solid has a mass of 180g. what is the density of the solid What would the density be of a solid, if I had a mass of 180g?
Monday, August 21, 2006 at 7:46pm by Glen

Chemistry
How do you calculate the density of a rectangular solid, which has a mass of 25.71
Wednesday, September 12, 2012 at 3:03pm by Trina

Chemistry
When a clear aqueous solution of calcium chloride (CaCl2) is mixed with a clear aqueous solution of sodium carbonate (Na2CO3), a white solid precipitate forms. What happens to the mass of the mixture after the solid precipitate forms? Choose the best answer. Mass decreases ...
Tuesday, September 25, 2012 at 10:31pm by Lily

chemistry
Kc = [Na+][Cl-]/[NaCl(s)] The above equation contains the concentration of NaCl in solid NaCl. This concentration is related to the density of solid NaCl and its molar mass. Since the density of NaCl or of any pure solid or pure liquid does not vary with the extent of a ...
Tuesday, July 21, 2009 at 3:10pm by jessica

chemistry
CaCO3 = CaO +CO2 after a 15.8g sample of calcium carbonate was heated in an open container to cause decompostition the mass of the remaining solid was determined to be 9.10g. calculate the mass of carbon dioxide produced.
Tuesday, September 14, 2010 at 10:02pm by Missy

Physics
A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.
Thursday, October 21, 2010 at 9:08pm by Gina

Chemistry
Some solid copper(II) sulfate is dissolved in sufficient water to make 100.0 mL of solution. Enough of a sodium hydroxide solution of concentration 0.1500 mol/L is added just to react with all of the first solution, with none left over. This turns out to be a volume of 47.08 ...
Tuesday, February 22, 2011 at 9:46pm by OLGA

Chemistry
This is a lab I have, but have no clue what to do. Please do out the steps so i can understand. Reactions and Data: NaOH(s)--> Na1+(aq)+ OH1-(aq) (Heat of solution of NaOH) This reaction involves adding solid NaOH to water and watching the temperature change as it dissolves...
Saturday, December 31, 2011 at 7:21pm by Carrie

Chemistry
Thanks; I obviously got it wrong, but what was my teacher talking about when she said that when you have a solid reacting, you don't use the mass of the solid for Q=mc(deltaT), only the mass of liquids or solutions? Why wouldn't that apply in this case?
Thursday, February 21, 2013 at 5:16pm by a Canadian

Science
1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? I think the alternative wording is fine. 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? ...
Monday, January 26, 2009 at 8:57pm by DrBob222

Chemistry
which method increase the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding has to the solid C)heading the solid D)reducing the size of the solid
Monday, January 10, 2011 at 12:18pm by AHS

Science
Calculate the density if the mass of a solid material is measuered as 15.00 grams and its volume is measured as 5.0cmCUBED?
Wednesday, August 20, 2008 at 5:49pm by Kyle

- Physical Education
Calculate the density in SI units of a solid cube that measures 5 cm on each side and has a mass of 350 g.
Thursday, September 30, 2010 at 7:18am by meera

Chemistry
A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL.
Monday, October 8, 2007 at 10:19pm by Raj

biology
Calculate the density of a solid cube that measures 5.18 cm on each side and has a mass of 197 g. Answer in units of g/cm3
Saturday, November 10, 2012 at 8:28pm by dynesha

Chemisty
Make a table heat warming solid=mass*csolid*(-98+149) heat melting solid to liquid=mass*Hf heat used heating liquid=mass*cliwuid(-83+98) add the heats.
Sunday, January 30, 2011 at 11:43am by bobpursley

Chemistry
If I have 1. Mass of test tube and sample 2. mass of test tube 3. mass of sample 4. mass of watch glass and organic solid x 5. mass of watch glass 6. mass of organic solid, x and percent component is calculated as (mass of component/total mass of sample)x 100 What is the mass ...
Saturday, April 7, 2012 at 1:45pm by Vanilla

Physics
A uniform solid sphere of mass 4kg and diameter 20cm initally at rest, begins to roll without slipping under the influece of gravity, down an incline that makes an angle of 15degrees to the horizontal 1 calculate the angular acceleration of the sphere 2 what is the total ...
Saturday, August 7, 2010 at 2:46pm by Dermot

physics
A solid sphere of mass 2 kg is rolling without slipping on a table with linear speed of 0.5 m/s. Calculate its total kinetic energy.
Wednesday, June 5, 2013 at 2:28pm by Anonymous

Chemistry
.....Ag2CO3 ==< 2Ag^+ + CO3^2- I.....solid......0.....0.0001 C.....solid......2x.......x E.....solid......2x...0.0001+x Subsitute the E line into the Ksp epxression and solve for x = solubility in M. Then grams = mols x molar mass
Thursday, April 17, 2014 at 6:12pm by DrBob222

Chemistry
7.5 g of a solid are added to 87.6g of water at 23.7 degrees C. When the solid has all been dissolved and thoroughly mixed with the water, the temperature of the solution is decreased by 6.2 degrees C. Calculate the heat of the solution in joules per gram of the solid.
Tuesday, July 15, 2008 at 11:15pm by Anonymous

chemistry
A 0.682g sample of impure NAHco3 yielded a solid residue consisting of NAc03 and other solid with a mass of 0.467g. What was the mass percent of NAc03 in the sample. The right 85.4% Who help
Friday, November 23, 2012 at 2:41pm by Fai

Chemistry
Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.
Saturday, February 2, 2013 at 11:39pm by Anna

Science
1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? 3) The statement "Particles in a gas are ...
Monday, January 26, 2009 at 8:57pm by anne

college chemistry
A solid consists of mixture of NaNO3 and Mg(NO3)2. When 6.50 g of this solid is dissolved in 50.0 g of water, the freezing point is lowered by 5.40⁰C. What is the composition of the solid (in mass percent)? Assume ideal behavior but watch out for the vant Hoff factor.
Wednesday, April 28, 2010 at 1:20pm by Stephanie

chemistry
calculate the mass of solid NaCl that must be added to 1.5L of 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl?
Friday, November 18, 2011 at 12:59pm by NONO

Chemistry 12
When 1.00 g. of MgCO3 is added to 2.0 L of water, some, but not all, will dissolve to form a saturated solution. Calculate the mass of solid that remains undissolved.
Thursday, April 4, 2013 at 10:33pm by Janice

Physics
Four objects - a hoop, a solid cylinder, a solid sphere, and a thin, spherical shell - each has a mass of 4.59 kg and a radius of 0.252 m. (a) Find the moment of inertia for each object as it rotates about the axes shown in the table above. hoop____ kgm2 solid cylinder____ kg...
Friday, March 19, 2010 at 7:28pm by Ana

chemistry
Calculate the mass of solid Na2S2O35H2O required to prepare 300. mL of 0.0200 M Na2S2O3
Monday, October 1, 2012 at 6:20pm by Nicolai

physics # 4
For the following question rank the objects in order from greatest to least. 4. Which object would be the most difficult to begin spinning about its center of mass? a.) Solid sphere b.) Hollow sphere c.) Hallow cylinder d.) Solid disk e.) Solid cylinder
Tuesday, August 7, 2007 at 11:44pm by gomez

physical science
the solid has a mass of 180g. what is the density of the solid?
Thursday, March 19, 2009 at 12:37am by blah

stoichiometry
When Ba(NO3)2 and K2CrO4 (sorry, i don't know how to do subscripts, but all the numbers should be subscripts!) react in aqueous solution, the yellow solid BaCrO4 is formed. Calculate the mass of BaCrO4 that forms when 3.50 x 10^(-3) mol of solid Ba(NO3)2 is dissolved in 265 mL...
Thursday, June 5, 2008 at 11:25pm by em

chemistry
You still have too many typos. If the problem is this. A 0.682 g sample of impure NaHCO3 yield a solid residue consisting of Na2CO3 and other solid with a mass of 0.467 g. What was the mass percent of NaHCO3? Let x = mass NaHCO3. and y = mass of the impurity. That's two ...
Friday, November 23, 2012 at 3:12pm by DrBob222

Physics
The first is the amount of heat needed to vaporize a liquid or sublime a solid, per unit mass. (Sublimation occurs when a material goes directly from solid to vapor). Temperature remains constant while the phase change occurs. The second, latent heat of fusuion, is the heat ...
Sunday, June 5, 2011 at 4:40am by drwls

12 chem
Q. When 300ml of Ticl4(gas), at 48 degrees Celcius and a pressure of 105.3 kPa, is reactes with 0.4320 g of magnesium, 0.4016 g of titanium is produces. TiCl4(gas) + 2Mg(solid) --> Ti(solid) + 2MgCl2(solid) Calculate the percentage yield for this reaction. -The answer for ...
Wednesday, February 4, 2009 at 5:02pm by wiz

chemistry grade 12
Q. When 300ml of TiCl4(gas), at 48 degrees celcius and a pressure of 105.4kPa, is reacted with 0.4320 g of magnesium, 0.4016 g of titanium is produced. TiCl4(gas) + 2Mg(solid) --> Ti(solid) + 2MgCl2(solid) Calculate the percentage yield for this reaction - The answer for ...
Wednesday, February 4, 2009 at 5:09pm by kite

chemistry
Notice the correct spelling of celsius. M CO2 = mols/L = 1.25 mol/125L = 1.0M ...........CO2 + C ==> 2CO I...........1...solid..0 C..........-x...solid..2x E..........1-x..solid..2x Kc = 14 = (CO)^2/(CO2) Substitute into Kc expression and solve for x,1-x and 2x If you want ...
Thursday, April 18, 2013 at 9:52pm by DrBob222

physics
the solid has a mass of 180g. what is the density of the solid?
Thursday, November 5, 2009 at 8:49pm by bre

Physics Archimedes buoyancy lab
In calculating the density of a heavy solid. The string holding the heavy solid will cause error. specific gravity= (mass object in air)/ (mass object in air- mass object in water) = density When does it lead to an experimental density that is too high? Too low? not sure...
Wednesday, December 12, 2007 at 12:27am by ~christina~

Math
A rectangle solid is 10.0cm long ,8.1cm wide and 2.7cm tall. The mass of the rectangular solid is 36g What is the density hi Density = mass/volume D = 36/(10 * 8.1 * 2.7) Your answer should be in terms of grams per cubic centimeter. I hope this helps. Thanks for asking.
Monday, July 23, 2007 at 1:32pm by Mason

chemistry
Work this problem in pieces. q with a single phase (liquid to liquid, vapor to vapor, solid to solid) = mass x specific heat in that phase x (Tfinal-Tinitial). q at a phase change is mass x heat fusion at zero C. mass x heat vaporization at 100 C. Then add each segment of q to...
Tuesday, April 24, 2012 at 10:31pm by DrBob222

Chemistry
Mass of acetone = volume x density. Calculate mass. moles = grams/molar mass Calculate moles acetone. delta Hvap = 31.3 kJ/mol. Calculate heat transfer.
Saturday, May 15, 2010 at 11:37pm by DrBob222

Chemsitry
Calculate the molar mass of an unknown molecular compound mixed with solid camphor C10H16O, heated and then cooled giving the following data. show all steps in calculation. mass of unknown: 0.195 g Tf(camphor)= 179.8 degree C Kf(camphor)=-40.0 degree C/m mass of camphor-25.03g...
Wednesday, July 10, 2013 at 3:54pm by Kelly

chemistry grade 12 science
Q. When 300ml of TiCl4(gas), at 48 degrees celcius and a pressure of 105.4kPa, is reacted with 0.4320 g of magnesium, 0.4016 g of titanium is produced. TiCl4(gas) + 2Mg(solid) --> Ti(solid) + 2MgCl2(solid) Calculate the percentage yield for this reaction - The answer for ...
Wednesday, February 4, 2009 at 5:10pm by kite

Chemistry
Calculate the mass of solid neded to make 500ml of solution that is 0.25m in sulfate ion, using sodium sulfate decahydrate.
Friday, October 28, 2011 at 7:50am by Emily

Chemistry
I wanted to calculate the average equivalent weight of an unknown acid for an acid-base titration experiment. The mass of the unknown that I had to obtain is 0.2 g and the equivalents of the acid is .001046 L x N. But is this equation right? Does the equivalent mass equal to ...
Monday, March 5, 2012 at 2:40pm by Priscilla

Chemistry- Please Help!!
Calculate the molar mass of an unknown molecular compound mixed with solid camphor C10H16O, heated and then cooled giving the following data. show all steps in calculation. mass of unknown: 0.195 g Tf(camphor)= 179.8 degree C Kf(camphor)=-40.0 degree C/m mass of camphor-25.03g...
Wednesday, July 10, 2013 at 2:02pm by Kelly

Chemistry
NH4HS(s) NH3(g) + H2S(g) ∆H_ = +93 kilojoules The equilibrium above is established by placing solid NH4HS in an evacuated container at 25C. At equilibrium, some solid NH4HS remains in the container. Predict and explain each of the following. (a) The effect on the ...
Thursday, January 13, 2011 at 2:14pm by Paul

Chemistry
Classify each of the following by the type of solid if forms: a. LiCl b. BaCl2 c. BCl3 d. CCl4 e. NCl3 I have four different types of solids to guess from like Metallic solid, ionic solid, molecular solid, covalent network solid and i dont know which goes with what element
Monday, February 4, 2008 at 11:56am by Lauren

Physics AP
A conical pendulum is formed by attaching a 50 g mass to a 1.2m string. The mass swings around a circle of radius 25cm. A claculate the speed of the mass. B Calculate the acceleration of the mass. C calculate the tension in the string
Thursday, December 19, 2013 at 9:16am by Robert

AP Chemistry
A precipitate is formed by adding 20.0 ml of 0.200M of sodium phosphate to 30.0 ml of 0.50M Copper sulfate. b.) what mass of solid will be formed? c.) Calculate the concentration of each ion in the solution after the precipitation is complete. See the other post. Balance the ...
Friday, January 5, 2007 at 12:58am by Jenna

science
wait..I thought you said how to calculate the mass of the moon but reading it again it says if I'm not incorrect, how to calculate your mass on the moono if it is so then your mass is: m-1/6(m)= your mass on the moon
Saturday, April 5, 2008 at 5:51pm by ~christina~

chemistry
q to raise T WITHIN a phase (solid to solid, liquid to liquid, gas to gas) = q = mass x specific heat in that phase x (Tfinal-Tinitial). q to CHANGE the phase (solid to liquid) is q = mass x heat fusion. q to CHANGE the phase (liquid to gas) = q = mass x heat vaporization.
Wednesday, December 7, 2011 at 11:05pm by DrBob222

CHEMISTRY
When a 1.146 gram mixture of solid Na2SO4 and Pb(NO3)2 is added to deionized water, a precipitate of PbSO4 forms and is allowed to settle. From tests preformed on the supernatant, Na2SO4 is determined to be the limiting reactant. After the precipitate is filtered and dried, ...
Friday, October 25, 2013 at 5:48pm by DrBob222

Physics - Unit Conversion
I am trying to calculate heat transfer between two objects. The units are as follows: mass: grams specific heat: cal/gm degree celsius temperature: degree celcius My numbers aren't working out and I know how to do the problem. So, what's the deal with the gm. Is that gram mass...
Tuesday, December 4, 2012 at 2:51pm by Brenda

chemistry
A 0.682g sample of impure Na2hco3 yield a solid residue consisting of nahco3 and other solid a mass of 0.467g. What was the mass percent of nac03in sample. I do not understand I want you step by step. Clear explain for me. nahco3 = 84 n22hco3 = 106
Friday, November 23, 2012 at 3:12pm by Fai

Chemistry
Which method increases the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding gas to the solid C)heating the solid D)reducing the size of the solid ****Please help!!!!******* I think the answer is C but i am not completely sure. If ...
Tuesday, January 11, 2011 at 12:28am by AHS

chemistry
6.Answer the following questions about BaC2O4 and its hydrate: A. calculate the mass percent of carbon in the hydrated form of the solid that has the fromula BaC2O4 * 3H2O
Friday, February 29, 2008 at 7:23am by anon

Science/Chemistry
Zn(OH)2 solid (molecular mass = 99.41 amu) is added to 0.500 L of 0.50 M HBr. The resultant solution which is acidic, requires 185 mL of 0.500 M NaOH for neutralization. Calculate the mass (in mg) of Zn(OH)2 that was originally added (problem 53 in Purdue test bank)
Sunday, September 28, 2008 at 4:42pm by Kelsey

CUC
1.(a) A solid sphere of mass 100gm and radius 2.5cm rolls without sliding wit ha uniform velocity of 10cm/sec along a straight line on a smooth horizontal table. Calculate the total energy. (b) A hoop of radius 100cm and mass 19kg is rolling along a horizontal surface, so that...
Saturday, May 26, 2012 at 6:04am by Theresa

Chemistry
........Fe(OH)3 ==> Fe^3+ + 3OH^- I.......solid........0........0 C.......solid........x........3x E.......solid........x........3x Ksp = (F^3+)(OH^-)^3 Substitute the E line into Ksp expression and solve for x, = [Fe(OH)3] in mols/L. That x molar mass = grams.
Thursday, April 10, 2014 at 10:15pm by DrBob222

chemistry
A student measures 0.2452 g of a monoprotic solid acid, and dissolves the solid in water to make 100.0 mL of solution. the entire solution is titrated to a phenolphthalein endpoint with 45.06mL of 0.1725M KOH. A. what is the molarity of the acid solution? B. what is the molar ...
Wednesday, November 9, 2011 at 5:31pm by ali

Physics
Calculate the angular momentum and kinetic energy of a solid uniform sphere with a radius of 0.120 m and a mass of 14.0 kg if it is rotating at 6.00 rad/s about an axis through its center..
Thursday, June 25, 2009 at 10:25pm by Sarah

Chemistry
I will save myself a lot of work and let you do most of it but here is how to go about it. First, identify any phase changes (solid to liquid or liquid to gas). q at any phase change = mass x heat vaporization (if vapor to liquid or liquid to vapor) or heat fusion (if liquid ...
Monday, November 21, 2011 at 11:44am by DrBob222

gen. chemistry
an unknown solid substance weighs 121g. calculate the specific heat if 425.2 cal raise the temperature of the solid from 24.0 degrees C to 55.7 degrees C.
Wednesday, February 20, 2013 at 4:36pm by lila

Chemistry
Look up Ksp for AgCl, AgBr and AgI. The salt with the smallest Ksp will ppt first.(this comparison is true only when the salts have the same ratio. In this case all are 1:1). The following shows you how to calculate Ag^+ at the time EACH ppts. However, AgCl will not ppt first ...
Monday, October 29, 2012 at 12:25pm by DrBob222

Chemistry
hellppp please i have a test on this on mondayy im so screwed A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25C is observed to be 0.4010 atm. What is the mass percent of ...
Saturday, November 29, 2008 at 10:21pm by yvonne

Chemistry
Use mass = volume x density to calculate the mass of 1000 mL of the final solution. Then use the definition of molality = mols/kg solution. I like to calculate the mass, then put molality into a single equation, which is, kg x m x molar mass = grams. You know kg, m, and molar ...
Tuesday, February 26, 2008 at 2:58pm by DrBob222

Chem 2
solubility = 0.0570 mol/L = 0.0570M ........AB ==> A^+ + B^- I......solid.. 0.....0 C......-x......x.....x E......solid...x.....x Ksp = (A^+)(B^-) Ksp = (x)(x) Substitute the value of x and calculate Ksp.
Thursday, July 18, 2013 at 9:00pm by DrBob222

Chemistry
Heat lost by solid + heat gained by H2O = 0 [mass solid x specific heat solid x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 Solve for specific heat solid.
Monday, November 7, 2011 at 7:59pm by DrBob222

Chemistry
............Sn(OH)2 ==> Sn^2+ + 2OH^- I............solid.......0........0 C............solid.......x........2x E............solid.......x........2x Ksp = (Sn^2+)(OH^-)^2 5.45E-27 = (x)(2x)^2 Solve for x = solubility in mols/L. Then grams = mols x molar mass
Tuesday, March 18, 2014 at 9:23pm by DrBob222

Chem
density = mass/volume. You know the mass from the problem, directly. The rest of the problem is about finding the volume. 268.5 = mass flask, H2O, metal -139.3 = mass flask -4.369 = mass meal ----------------- ansxxgrams = mass H2O Volume H2O = mass H20/density H2O = about 124...
Wednesday, December 5, 2012 at 9:52am by DrBob222

Chemistry
Kp, if you wish to calculate it is p^2 = 0.00552^2 but I'm not sure you need it. The problem is confusing to me too, I wonder if this is a trick question. Since NH4Cl is a solid, it does not enter into the equilibrium as long as there is a speck of NH4Cl solid present. ...
Monday, March 19, 2012 at 12:16am by DrBob222

Chemistry
There are two formula to use and you can progress from the solid, liquid, gas. When you change the phase, you go with q = mass x heat fusion (at the melting point) or q = mass x heat vap at the boiling point. When the phase is not changing, you go with q = mass x specific heat...
Tuesday, November 8, 2011 at 8:25pm by DrBob222

AP Chemistry
(a)calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4 X 3 H2O (s). I divided 24.02 g by 151.08 g and got .16, or 16%. is that correct? Also, I'm having trouble with this follow up question. When heated to 220 degrees C, BeC2O4 X ...
Wednesday, September 19, 2007 at 4:47pm by Patrick

Chemistry
Calculate the mass of CO2(g). I don't know your set up and you didn't explain but it appears mass CO2 is 26.600-25.300 = ? Calculate the number of moles of CO2(g). mols = grams/molar mass Calculate the density of CO2(g) in g/L. At what temperature? 287.4 K. You have grams and ...
Sunday, October 21, 2012 at 6:33pm by DrBob222

Chemistry
If I have the temperature, the pressure and the mass how do I calculate the volume? Thanks Of a gas? PV=nRT The ideal gas law. calculate n from the mass and mol mass.
Sunday, February 25, 2007 at 9:30am by Laura

Chemistry
Sorry I clicked to fast but that is the question and I have four different types of solids to guess from Like Metallic solid, ionic solid, molecular solid, covalent network solid and i dont know which goes with what element
Sunday, February 3, 2008 at 5:34pm by Lauren

chemistry
A sample of solid monoprotic acid with molar mass equal to 169.7 g/mol was titrated with 0.1599 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL. Is the solution correct?: moles NaOH = 0.1599 x 0.025=3.998x10...
Friday, October 3, 2008 at 12:17am by Erika

Physics
1. A hollow sphere and a solid sphere roll without slipping down two different ramps. They start at different heights. The speed and kinetic energy of each sphere is the same when they reach the bottom of their ramp. If the hollow sphere has mass 3.25 kg, what is the mass of ...
Wednesday, November 17, 2010 at 9:04pm by Joelle

chemistry
A sample of solid monoprotic acid with molar mass equal to 169.7 g/mol was titrated with 0.1599M sodium hydroxide solution. Calculate the mass in grms fo acid to be used if the volume of NAOH to be used is 25ml. My calculation 0.1599 x 0.025L = 0.00399 0.00399 x 1000 = 3.9975 ...
Saturday, August 4, 2012 at 2:41pm by Fai

Chemistry
I'm not usre of your use of the terms heat of solid and heat of liquid. The heat required to move the temperature of a solid from Tinitial to Tfinal, is q = mass x specific heat solid x (Tfinal-Tinitial) and Tfinal can't be greater than the melting point. The heat required to ...
Thursday, June 10, 2010 at 5:28pm by DrBob222

Chemistry
total mass: 47.27g solid mass: 22.19g so, toluene mass: 25.08g toluene density is .864g/ml, so toluene volume: 25.08g / 0.864g/ml = 29.03ml so, solid volume: 20.97ml solid density: 22.19g/20.97ml = 1.058g/ml
Monday, August 20, 2012 at 6:09pm by Steve

Physics
A uniform solid disk of radius 1.7 m and mass 81.3 kg is free to rotate on a frictionless pivot through a point on its rim. If the disk is released from rest in the position shown by the solid circle, what is the speed of its center of mass when the disk reaches the position ...
Saturday, March 19, 2011 at 9:13pm by Jennifer

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