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December 10, 2016

Search: what is the molarity of a solution made by dissolving 3.4g of Ba(OH) in enough water to make 350 mL solution? Assume that Ba(OH)2 ionizes completely in water toBa2+ and OH- ions. What is the pH of the solution?

Number of results: 85,630

Chemistry
A solution was made by dissolving 62.07grams of a compound in 500g of water. The compound was not ionic. The freezing point of the solution was measured and found to be -1.86degrees celsius. The molar mass of this compound can be calculated to be? I know I already posted this ...
February 15, 2012 by Hannah

Chemistry
A glucose solution contains 55.0g of glucose C6H12O6 in 475g of water. Compute the freezing point and boiling point of the solution. Assume a density of 1.00g/mL for water.
September 18, 2012 by Monica

chemistry
The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol) in 39 g of H2O is __________ M. The density of the solution is 1.3 g/mL. i get 8.9 but the practice test says the answer its 6.3
September 26, 2010 by BenY

College Chemistry
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 21, 2010 by Christian Gillard

College Chemistry
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 21, 2010 by Christian Gillard

College Chemistry
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 21, 2010 by Christian Gillard

chemistry
I have the answers, I am just interested in the formulas so that I can solve the problems, thanks! 1. Find the boiling point of a solution composed of 110g of HgCl2 (a non-ionizing solute) in 175g of water. 2. Find the freezing point of a solution composed of 50g IBr in 120 g ...
April 15, 2014 by lisa

Math
A 9 percent salt-water solution is mixed with 4 ounces of an 18 percent salt-water solution in order to obtain a 15 percent salt-water solution. How much of the first solution should be used?
September 1, 2010 by Jeanne

Chemistry
Diethylamine (C2H5)2NH, is a weak base that ionizes in water,a 0.600 M solution of (C2H5)2NH is 4.65% ionized at 25 degrees Celsius. -Calculate the pH of the solution. -Calculate the Kb for diethylamine.
December 5, 2012 by Chris

Chemistry
A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16g/mol) in 10.00 mL of NaOH and heating the solution to a gentle boil. After cooling to room temperature, the solution was poured into a 250 ml volumetric flask and diluted to the mark with DI water...
February 3, 2008 by Anonymous

Chemistry
A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 g of X (a substance with a molar mass of 70.0 g/mol) is added, it dissolves via the reaction X(s)+H_2O(l)reacts to make X(aq) and the temperature of the solution increases to 28.5degreesC. Calculate the ...
October 22, 2010 by Ellen

Chemistry
A saturated Ni(OH)_2_ can be prepared by dissolving 0.239 mg of Ni(OH)_2_ in water to make 500.0 mL of solution. What is the Ksp for Ni(OH)_2_?
March 15, 2012 by Shane

Science
A cellulose solution contains 5% cellulose by weight in water. It is to be diluted to 4.0 % using a 1% solution of cellulose in water. Determine the kilograms of 1% solution required to dilute 100 kg of the 5% solution.
March 26, 2015 by Man Singh Chouhan

Chemistry
If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to make the solution? Step by step would be appreciated!
March 14, 2013 by Tim

science
compare table salt with glucose table salt is a strong electrolyte that will completely dissolve in a solution. whereas, glucose is a weak electrolyte and won't dissolve in a solution. ex. NaCl in water makes Na+ and Cl- ions glucose in water is basically just glucose...I ...
January 22, 2007 by 1234

Chemistry
The answeres to the previous post was not what I am looking for...so please try to help me..... How can I make various concentrations of CuSO4(this is a blue solution)? I know that to make 0.1M you would fill the copper solution up to 10mL in the graduated cylinder and then ...
January 6, 2014 by Anonymous

CHEMISTRY
The answeres to the previous post was not what I am looking for...so please try to help me..... How can I make various concentrations of CuSO4(this is a blue solution)? I know that to make 0.1M you would fill the copper solution up to 10mL in the graduated cylinder and then ...
January 6, 2014 by Anonymous

Chemistry
The answeres to the previous post was not what I am looking for...so please try to help me..... How can I make various concentrations of CuSO4(this is a blue solution)? I know that to make 0.1M you would fill the copper solution up to 10mL in the graduated cylinder and then ...
January 6, 2014 by Anonymous

Algebra 1
1. A chemistry student needs to make a solution that is 70% water and 30% hydrochloric acid. The student's current mixture of 300 ml is 60% water and 40% hydrochloric acid. How much water must the student add to achieve his desired solution? A: ? 2. 5. 2/t + 4/3t = 4/t + 2 A: ...
June 3, 2014 by Victoria

chemistry
5.85g of sodium chloride is dissolved in 250mL of solution. Calculate: a)the molarity of the solution b)the mass percentage of the solute. can we use the given volume(i.e,250mL as total volume of the solution or volume of water in this problem?
November 3, 2013 by Asmera

College of Medicine ;University of Malawi
what is the ph at 25 degrees Celsius of a solution made by dissolving a 5.00 grain tablet of aspirin in 0.500 litres of water? The tablet contains 0.325g of the acid HC9H7O4. ka=3.3*10^-4mm=180.2g/l
December 3, 2015 by Andrew

Chemistry
I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and mole fraction.
November 3, 2011 by Emily

chemistry
a 230.0ml sample of a 0.275 molarity solution is left on a hot plate over night the folowing morning the solution is 1.5 molarity. what volume of solvent has evaportated from the 0.275 molarity solution?
June 21, 2012 by kristen

chemistry
a 230.0ml sample of a 0.275 molarity solution is left on a hot plate over night the folowing morning the solution is 1.5 molarity. what volume of solvent has evaportated from the 0.275 molarity solution?
June 21, 2012 by kristen

chemistry
a 230.0ml sample of a 0.275 molarity solution is left on a hot plate over night the folowing morning the solution is 1.5 molarity. what volume of solvent has evaportated from the 0.275 molarity solution?
June 21, 2012 by kristen

urgent i need help within an hour!
Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 83.3 g of ascorbic acid dissolved in 210. g of water has a density of 1.23 g/mL at 55°C Calculate the molarity of ascorbic acid in this solution. i got 2.77 but its wrong
January 21, 2013 by Samantha

chemistry
The heat of solution of potassium acetate (KC2H3O2) in water is -15.3 kJ/mol. If 18.8 g of KC2H3O2(s) is dissolved in 655 mL of water that is initially at 25.8 °C, what will be the final temperature (in degrees Celcius) of the resulting aqueous solution? (Assume no heat ...
March 3, 2015 by Fiona

chemistry
URGENT!! You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution? Specify the glassware ...
October 11, 2010 by Martin

CHEMISTRRY
What is the molarity of an HCl solution if 49.0 mL is completely titrated by 68.4 mL of an NaOh solution whose concentration is 0.333 M?
June 8, 2010 by Mel

Chemistry
What is the molarity of 550.0 mL of KOH solution, that reacts completely with 675 mL of a 0.450 M CrCl3 solution?
September 27, 2010 by Tara

Gen Chem
A mixture of NaCl and sucrose (C12H22O11) of combined mass 10.2 g is dissolved in enough water to make up a 250 mL solution. The osmotic pressure of the solution is 8.29 atm at 23°C. Calculate the mass percent of NaCl in the mixture.
February 4, 2016 by Brittany

Chemistry
The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg) help, how do i solve this...
February 4, 2008 by Jake

chemistry
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular weight of this ...
March 23, 2009 by tomi

chemistry
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular weight of this ...
March 23, 2009 by tomi

Chenistry
If 33.7 grams of LiOH dissolve in enough water to make a 231-gram solution, what is the concentration in percent by mass?
March 21, 2011 by ilyrae

Science
If 33.7 grams of LiOH dissolve in enough water to make a 231-gram solution, what is the concentration in percent by mass?
March 10, 2014 by Josh

chemistry
You were given 25.00 ml of an acetic acid solution of unknown concentration. You find that it requires 29.60 ml of a 0.1050 M NaOH solution to exaclty neutralize this sample. A) What is the molarity of the acetic acid solution? B) what is the percentage of acetic acid in the ...
October 20, 2011 by Rema

Chem
1. What is the molarity of a copper(II) dihydroxide [Cu(OH)2] solution if 25.25 mL of the solution is titrated to the equivalence point with 36.18 mL of 0.549 M prussic acid [H(CN)]? 2. What volume of a 0.138 M dihydroxyl base solution is needed to neutralize 28.47 mL of 0.745...
March 29, 2015 by TK

chemistry
A total of 2.00 \rm mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 115 g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7 ^\circ \rm C. What is the enthalpy of this reaction? Assume that...
October 2, 2011 by Anonymous

Chemistry Check Please! ?Fixed
A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.548 mol moles of c12h22O11= 3.44g/342.3(g/mol)=0....
January 17, 2014 by Kate

chemistry......plz help
A solution is prepared by dissolving 10.00g of a monobasic salt in a total volume of 1.00litres. Th pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular weight of this ...
March 24, 2009 by tomi

Chemistry
1x10-2 mol of MgSO4 (Ksp = 9) is added to 1 L of water. Will 1x10-5 mol of CaSO4 (Ksp = 10-6) completely dissolve in the solution? I think the answer is yes...because the Q will be less than Ksp of 10^-6?? Which of the following salts would you expect to result in the greatest...
March 16, 2010 by Trixie

chemistry
A saturated solution of NaCl (dissolved in water) has a concentration of 4.01 M at a given temperature. The solution has a volume of 1 L (1000 mL). If the water were to evaporate until the volume of the solution is 500 mL (and then stirred), what would the concentration of ...
February 14, 2013 by Avi

AP Chem
An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride dissolves in water, the calcium ions, Ca^+2, and chloride ions, Cl^-, in the crystal go into the solution. What is the molar concentration of each ...
November 3, 2008 by Anna

chemistry
If 34.7 mL of 0.210 M KOH is required to completely neutralize 30.0 mL of a CH3COOH solution, what is the molarity of the acetic acid solution?
May 3, 2012 by Heny

Chemistry
1. A graduate measured out a 100. mL hard water sample and titrated it with 37.6 mL of 0.0100 M EDTA solution for a total hardness endpoint, and 29.3 mL of 0.0100 M EDTA solution for a calcium endpoint. Calculate the molarity with respect to magnesium and calcium. Please ...
January 21, 2016 by Adam

Chemistry
describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2; 0.20 M solutions of NaCl, NaBr, NaBrO3, and CuSO4; a 0.40 M solution of NaI; a 0.50 M solution of H2SO4; ...
October 25, 2016 by Jana

Chemistry- Please Help!
Calculate the freezing point of an aqueous solution formed by dissolbing 4.22 g of KCl in 25.00 mL of water. Kf for water is (-1.86 degree C/m). Assume density of water is 1.00 g/mL. (Hint: Use the ideal van't Hoff factor, i).
July 10, 2013 by Kelly

chemistry
I have no idea how to solve this problem, please help me out.... thanks a) A liter of a solution saturated at 25degree with calcium oxalate, CaC2O4, is evaporated to dryness, giving a 0.0061gm residue of CaC2O4. calculate the concentrations of the ions, and molar solubility ...
April 6, 2007 by wendy

Chemistry
Provide equations for each of the following: a. Dissociation of a strong base in water solution b. Ionization of a strong acid in water solution: c. Ionization of a weak acid in water solution: d. Ionization of a weak base in water solution: e. Autoionization of water:
April 29, 2014 by ASAP!!

Chemistry
Industrial Sulfuric Acid (H2SO4) may be purchased as 97 % (weight percent solution). Find the concentration of this solution of H2SO4 in units of mg/L. Also find the molarity and normality. Sulfuric Acid (100%) has a specific gravity of 1.839. Assume that the temperature of ...
December 12, 2010 by Amanda

science
In the lab you need to make 1.00 L of a 0.300 M NaCl solution. You had previously made a 0.950 M NaCl solution that you can dilute to form your new solution. How many mL of the concentrated solution would you use to make the dilute solution?
November 2, 2011 by liz

Chemistry
What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer in 3 sigfigs?
November 26, 2012 by Jake

Chemistry 12
15. The concentration of hydroxide ions in a solution of nitric acid 0.2 M is: a. 2 x 10-14 M b. 5 x 10-14 M c. 5 x 10-7 M d. 2 x 10-1 M 16. Aqueous solutions of strong acids and strong bases: a. are good electricity conductors b. make litmus paper become red c. have a pH of 7...
December 3, 2012 by Need Help

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 25°C is observed to be 0.4010 atm. What is the mass percent of ...
November 29, 2008 by yvonne

chemistry
A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16 g/mol) in 10.00 mL of NaOH and heating the solution to a gentle boil. After cooling to room temperature, the solution was poured into a 250-mL volumetric flask and diluted to the mark with DI ...
January 28, 2010 by Tasha

chem
(a) When a 4.75-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter (see figure), the temperature drops from 23.0‹C to 16.6‹C. Calculate ƒ¢H (in kJ/mol NH4NO3) for the solution process NH4NO3(s) ¨ NH4+(aq) + NO3−(aq). ...
November 6, 2012 by hannah

chemistry
A student placed 11.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 25.0...
January 31, 2010 by sam

Chemistry
A student placed 14.0 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0...
February 8, 2010 by Sherryl

chemistry
A 60.0-g sample of NaOH is dissolved in water, and the solution is diluted to give a final volume of 1.50 L. The molarity of the final solution is ?
December 10, 2009 by Anonymous

chemistry
If 5 g of solid sodium hydroxide is dissolved in 100 mL of water, what is the molarity of the solution in moles of NaOH/L of solution (moles/L)?
September 29, 2011 by Sarah

chemistry
A student placed 12.5 of glucose () in a 100.- volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the calibration mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
March 12, 2009 by tomi

Chemistry
A student placed 12.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
September 29, 2010 by Steve

chemistry
If 150.0 Ml of HCL solution are required to react completely with .35 moles of solid NaOH whats the molarity of the solution?
October 12, 2009 by Aleander Azumah

chemistry
If 215.0 mL of water are added to a 237 mL sample of a 1.702 M dextrose solution, what is the new molarity of dextrose in the resulting solution?
December 2, 2011 by B

chemistry
A sample containing .187 g cl is dissolved in 50.0 mL water. How many moles of cl ion are in the solution? what is the molarity of the cl ion in the solution?
March 1, 2011 by kristen

chemistry
If you add a metal piece to excess acid, what of listed factors below will increase, decrease, or have no impact on how fast a reaction happens? a) lower molarity (concentration) of a solution b) higher molarity (concentration)of a solution c) increase volume of a solution (...
May 22, 2013 by K

chemistry
A solution was made by dissolving 5.15 mg of hemoglobin in water to give final volume of 1.00 mL. The osmotic pressure of this solution was 1.97 x 10^-3 atm at 25C. Calculate the molar mass of hemoglobin. pi = iMRT i = 1 since hemoglobin is nonelectrolyte and doesn't ...
September 14, 2012 by Wiped Out

Chemistry
What is the percent by volume concentration of a solution containing 300.mL of isopropyl alcohol and enough water to give 400.ml of solution?Which component is the solute and which is the solvent?
March 16, 2014 by Hannah

chemistry
A student placed 19.0g of glucose (c6h12o6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100ml.- mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 28, 2010 by Heather

Chemistry Help Please!!!
A student placed 17.0 g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
June 4, 2011 by Christy

chem
A student placed 13.5g of glucose (\rm C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. \rm mL mark on the neck of the flask was reached. The flask was then shaken until the ...
February 15, 2013 by Anonymous

Chemistry
Calculate the mass of HONH2 required to dissolve in enough water to make 255.5 mL of solution having a pH of 10.02 (Kb = 1.110−8).
February 27, 2013 by Margaret

Chemistry
Calculate the mass of HONH2 required to dissolve in enough water to make 255.5 mL of solution having a pH of 10.02 (Kb = 1.110−8).
February 28, 2013 by Margaret

Chemistry
Find the pH of a solution prepared by taking a 50.0 mL aliquot of a solution prepared by dissolving 12.25g of NaOH and 250.0 mL of water and diluting that aliquot to 1.00L?
January 20, 2011 by Audrey

science-biology
In lab, you use a special balloon that is permeable to water but not sucrose to make an "artificial cell". The balloon is filled with a solution of 20% sucrose and 80% water and is immersed in a beaker containing a solution of 40% sucrose and 60% water. Which of the folloing ...
November 19, 2010 by Tracee

Chemistry
Using Volumetric Glassware to Measure, Dilute,and Titrate Acid Solution 1)For each of the following procedural errors, indicate whether the calculated molarity of the HCl solution would be higher or lower than the actual molarity. Briefly explain. a)The NaOH titrant is ...
April 1, 2011 by Anonymous

chemistry
8.058g x 10-2 kg of washing soda na2co3 10h20 is dissolved in water to obtain 1L of a solution of density 1077.2kg/m3. Calculate the molarity, molality and mole fraction of na2c03 in the solution? who helps
January 1, 2013 by Fai

Chemistry
When 5.00 g of NaOH(s) are added to 100 g of water using a calorimeter, the temperature rises from 25.0 to 37.5 °C. Calculate the molar heat of solution. NaOH(s)--->Na(aq)+OH(aq) Assume that the specific heat capacity of water is 4.18 J/gK and that of the NaOH(aq) solution...
November 14, 2012 by FIrst_lady

Chemistry
Help! I have to get this done tonight and I cannot get this answer right. A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 3.55 ∘C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 &#...
February 28, 2016 by Emmalee

Chem II
What mass of ethanol must be added to 10.0L of water to five a solution that freezes at -10.0 degrees C. Assume the density of water is q.00 g/mL. Kf of water is 1.86 degrees C/m.
June 6, 2008 by Ken

chemistry
A solution is prepared by dissolving 10.00 grams of a monobasic salt in a total volume of 1.00 litres. The pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular weight of this...
January 29, 2014 by Temmi

Chemistry HELP!
A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 12, 2009 by anonymous

chem
A student placed 12.5 of glucose (C6H12O6) in a 100ml volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the calibration mark on the neck of the flask was reached. The flask was then shaken until the solution ...
March 12, 2009 by tomi

Chemistry-Please help
A student placed 11.0 of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform...
October 5, 2009 by Rose

chemistry
A total of 2.00mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 185g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C . What is the enthalpy of this reaction? Assume that no heat is lost ...
November 25, 2011 by Yuli

Chemistry
A 2.7 M solution of phosphoric acid (H3PO4) is to be reacted with a 7.5 M solution of sodium hydroxide to make sodium phosphate and water. How many L of the H3PO4 solution will react with 0.662 L of the NaOH solution
April 25, 2012 by John

BLD 414
A liquid solution of formaldehyde is 37.0% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. to 1.00 ml of this impure stock solution is added quantity sufficient to take the total volume to 500ml. If 1.00 ml of this solution is...
March 19, 2012 by Amber`

RE: Water
If I boil water at home, when and how do I know I've boiled the water long enough to make distilled water?
January 1, 2008 by Diana

Chemistry
Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage batteries(like a car battery). 1....
January 9, 2011 by Kevin

chemistry
the density at 20 degrees celcius of a .258m solution of glucose in water is 1.0173 g/ml, and the molar mass of glucose is 180.2 g/mol. What is the MOLARITY of the solution?
October 20, 2008 by Eric GReenblatt

chemistry
20mL ethanol(density=o.789g/mol) is dissolved in sufficient water to produce a 200mL solution. the density of the solution is 0.982g/mL. what is the molarity?
March 11, 2013 by mj

chemistry
A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution
February 9, 2014 by Mary

chemistry
Compute the vapor pressure of water above a solution formed by dissolving 25.00 grams of magnesium sulfate, MgSO4 (MM=120.3) in 95.00 grams of water at 338K. The vapor pressure of pure water at 338K is 188.0 torr.
February 23, 2009 by Aimee

Please Help Fast
A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
February 12, 2009 by anonymous

Biochemistry
Can someone help me calculate protein concentration using the Bradford Assay? If you could show me how to do tube 2, that'd be great. Tube 1: 0 ul Protein Stock Solution, 800 ul Water, 0 ug Protein, Absorbance @595nm = 0 Tube 2: 10 ul Protein Stock Solution, 790 ul Water, 1.4 ...
October 7, 2013 by OR

chem
an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is contradict from the real ans.
July 21, 2011 by lily

holy school
H2 S + HNO3 --------> NO + H2 O + S 150 g of hydrogen sulfide are dissolved in 3500 mL of water. a. What is the molarity of the hydrogen sulfide solution? b. How many grams of sulfur can be produced from 50 mL of this solution? c. 22.4 L of nitrogen monoxide gas are ...
March 3, 2013 by mamta

Chemistry Check Please!
A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.5556 mol moles of c12h22O11= 3.44g/342.3(g/mol)=0....
January 16, 2014 by Kate

Chemistry
A solution is made by mixing 30.0 mL of ethanol, C2H6O, and 70.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? I got an answer of 15.45 torr and it marked me incorrect and said "Your answer is the the partial vapor pressure ...
February 18, 2012 by Lauren

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