Friday
April 18, 2014

Search: Calculate the molarity of a solution made by dissolving .0715 mol Na2SO4 in enough water to form 650mL of solution

Number of results: 88,401

chemistry
a sample of 0.002 mole of HCL is dissolved in water to make a 2000mL solution. What is the molarity?
Wednesday, December 7, 2011 at 10:04pm by kate

chemistry
a 4g of sugar C12H22O11 is dissolved in 350ml fill with hot water,what is he molarity of solution?
Friday, March 2, 2012 at 1:06pm by Anonymous

Chemistry
what molarity does a solution with 17.1 grams of sugar and 500 mL of distilled water have?
Tuesday, September 28, 2010 at 7:16pm by Angie

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....
Sunday, January 9, 2011 at 10:13pm by Kevin

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...
Sunday, October 2, 2011 at 6:32pm by Anonymous

Chemistry
The definition of molarity is: molarity = # mols/L. You know molarity and you know L; calculate mols.
Sunday, March 9, 2008 at 9:29pm by DrBob222

Is anyone here a chemistry genuis?
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...
Friday, April 9, 2010 at 12:49am by timmy

Chemistry
you have .2*2 moles H2PO4 you have .6*2 moles of NaOH balanced equation: H3PO4 + 3NaOH>> Na3PO4 + H2O so for each mole of acid, you need three times that amount of base. .4moles acid, need 1.2 moles of base, but you have 1.2, which is magically just right. So, you should...
Tuesday, October 4, 2011 at 3:36pm by bobpursley

chem
How many moles of potassium iodide, KI, are required to precipitate all of the lead(II) ion from 25.0 mL of a 1.6 M Pb(NO3)2 solution? A. 0.020 mol B. 0.040 mol C. 0.080 mol D. 0.64 mol E. 64 mol
Sunday, April 28, 2013 at 3:48pm by victoria

chemistry
Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add the moles of both ...
Monday, August 29, 2011 at 5:47pm by Davis

Chemistry
The empirical formula for Brilliant Blie dye is C37 H34 N2 O9 S3 Na2, and the formula weight is 792.86 g/mol. How would you prepare a 4.73 X 10^-6 M solution of Brilliant Blue dye? How many grams of the dye do you need to add to a 1.00 L of water to make this solution? I have ...
Wednesday, October 12, 2011 at 7:50pm by Hannah

CHEMISTRY
Calculate the change in entropy that occurs when 17.68 g of ice at -12.7C is placed in 54.05 g of water at 100.0C in a perfectly insulated vessel. Assume that the molar heat capacities for H2O(s) and H2O(l) are 37.5 J K-1 mol-1 and 75.3 J K-1 mol-1, respectively, and the ...
Tuesday, October 23, 2012 at 2:21am by Sarah

Calorimetry
A calorimeter contains 21.0 mL of water at 12.0 degress Celsius. When 2.40g of X (a substance with a molar mass of 50.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l) --> X (aq) and the temperature of the solution increases to 29.5 degress celsius. Calculate ...
Tuesday, September 23, 2008 at 1:53am by Sarah

chemistry Molarity
You have 353 mL of a 1.25 M potassium Chloride solution, but you need to make a 0.50 M potassium Chloride solution. How many milliliters of water must you add to the original 1.25 M solution to make the 0.50 M potassium Chloride solution
Saturday, December 11, 2010 at 2:17pm by Kevin

Chemistry.
You're on the right track and you ALMOST have it. Would you just do this: 0.100M X 0.025 L = ?? mols exactly right. and then ?? mols / 18.65 mL? remember definition of M = mols/Liter. Therefore, you must change 18.65 mL to liters. Otherwise, you have it down ok but see the ...
Friday, October 31, 2008 at 11:45am by DrBob222

chemistry
A 10.0 mL sample of 3.00 M KOH(aq) is transferred to a 250.0 ml volumetric flask and diluted to the mark. It was found that 38.5 ml of this diluted solution was needed to react the stoichimetric point in a titration of 10.0 mL of a phosphoric acid, H3PO4, solution. The ...
Saturday, June 20, 2009 at 12:16am by dan

Chemistry
If 535 Ml of gaseous HCL, at 26.5 degrees Celsius and 747mm Hg, is dissolved in enough water to prepare 625 ml of solution, what is the PH of the solution?
Wednesday, August 5, 2009 at 1:21am by ChemHurts

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?
Sunday, March 16, 2014 at 6:20pm by Hannah

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
Tuesday, February 8, 2011 at 1:06pm by Paul

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
Wednesday, February 9, 2011 at 9:26am by Paul

natural product 2
: Chloral hydrate solution is prepared by dissolving ____gms of solid chloral hydrate in 20ml water
Saturday, August 3, 2013 at 10:46am by ravi avaiya

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
Thursday, March 10, 2011 at 6:05am by Adrian

Chemistry. Percent mass...
0.471g / 303.26g/mol = 1.553x10^-3 mol PbSO4 moles of Na2SO4 = 1.553x10^-3 > 0.2206 g (total in the sample) moles of Pb(NO3)2 reacting = 1.553x10^-3 > 0.51435g 1.009 g - 0.2206 g = 0.7884 g Pb(NO3)2 total in the sample % Na2SO4 in the sample was: (100)(0.2206 ...
Friday, November 21, 2008 at 7:37pm by GK

Chemistry
A 0.528 gram sample of a metal, M, reacts completely with sulfuric acid according to: M+H2SO4 -> MSO4+H2 A volume of 205 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and...
Wednesday, October 17, 2012 at 10:28pm by Bill

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?
Tuesday, March 1, 2011 at 2:26pm by kristen

Chemistry
A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50 g of X (a substance with a molar mass of 65.0 g/mol) is added, it dissolves via the reaction: X (s)+H2O (l) ---> X (aq) and the temperature of the solution increases to 26.0 degrees C. Calculate the ...
Thursday, June 21, 2012 at 9:00pm by Abby

Chemistry
Calculate the molality, molarity, and mole fraction of FeCl3 in a 39.2 mass % aqueous solution (d = 1.238 g/mL).
Saturday, February 16, 2013 at 5:07pm by Stevi

Chem(Check Please)
Will someone please check my answers for me? I put arrows(<----) to indicate my answer. Thank you in advance. 1.A student increases the temperature of a 556 cm balloon from 278 K to 308 K. Assuming constant pressure, what should the new volume of the balloon be? 320 cm3 ...
Thursday, June 21, 2012 at 1:32am by Anonymous

Chemsitry
When 3.75 g of a nonelectrolyte solute is dissolved in 405 mL of water at 25 C, the resulting solution exerts an osmotic pressure of 897 torr. What is molarity? I found molarity to be 0.048. What is the number of moles of solute? to find moles, I multiplied it by .405 and got...
Friday, March 1, 2013 at 11:08pm by Anonymous

chemistry
calculate the Ph of 0.3 M sodium propanoate, Ka 2.0 x 10 base -3. then calculate the pH after 0.03 mol NCL is added to 2L of the first solution.
Saturday, July 20, 2013 at 1:36pm by Mandy

Chemistry. Help please
Calculate the pH of a buffer solution made by mixing 174 mL of a 1.68M trimethylamine (CH3)3N solution with 250 mL of a 1.08M trimethylammonia chloride, (CH3)3NHCl solution.
Thursday, December 9, 2010 at 9:14pm by Stephanie

Chemistry
When 23.6 of calcium chloirde CaCl2 was dissolved in water in a calorimeter, the temperature rose from 25.0 degrees C to 21.56 degrees C. If the heat capacity of the solution and the calorimeter is 1071 J/ degrees C, what is the enthalpy change when 1 mol of sodium nitrate ...
Thursday, November 1, 2007 at 11:52am by Lauren

chemistry
If 26.223 mL of potassium permanganate solution is required to titrate 1.041 g of ferrous ammonium sulfate hexahydrate, { FeSO4(NH4)2So46H2O }, calculate the molarity of the KMno4 solution. and the equation the lab gave me was Mn04(-) + 8H(+) + 5Fe(+2) ----> Mn(2+) + 4H2O...
Tuesday, March 11, 2008 at 4:16am by chris

physics
an antifreeze solution is made by mixing ethylene glycol (density= 1116 kg/m^3) with water. suppose that the specific gravity of such a solution is 1.0730. assuming that the total volume of the solution is the sum of its parts, determine the volume percentage of ethylene ...
Saturday, November 20, 2010 at 11:33pm by kai

Chemistry
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 58.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 C when the reverse osmosis stops? ___M ...
Saturday, February 18, 2012 at 8:16pm by Tracy

chemistry
a)1.40mol Na2SO4 in 1750 g H2O Are these the right steps? 1.40mol Na2SO4 / 1.75kg = .8m 3 * 1.86 degrees C * .8m = 4.46 degrees C OK to here. The next step is wrong. 4.46 degrees C - 1.86 degrees C = 2.6 degrees C Why is it wrong? The normal freezing point of water is zero C; ...
Thursday, April 29, 2010 at 6:26pm by DrBob222

Chemistry
A buret (initial and final buret reading were 2.20 mL and 11.86 mL) was used to deliver a sample of 2.1E-5 M stock dye into a 25.0 mL volumetric flask. The dye was then diluted with water to exactly 25.0 mL. Calculate the molarity of the resulting solution.
Tuesday, October 26, 2010 at 4:37pm by Mallory

Chemistry
You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 5.00 using only pure acetic acid, 3.00 M NaOH, and water. Calculate the quantities needed for each of the following steps in the buffer preparation. 1. Add acetic acid to ~400 mL of water in a 500 mL beaker. ...
Friday, September 28, 2012 at 2:33am by Kw1h

Chemistry help pls helppppp
What volume of a solution that is 15.7 % (w/w) lolinic acid (density = 1.64 g/mL) contains 4.25 g of lolinic acid? What is the molarity of a 20.2 % (w/w) solution of rossonic acid (423.6 g mol-1) that has a density of 1.78 g mL-1?
Friday, January 31, 2014 at 1:37am by nene

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 ...
Sunday, February 21, 2010 at 11:06pm 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 ...
Sunday, February 21, 2010 at 11:06pm 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 ...
Sunday, February 21, 2010 at 11:07pm by Christian Gillard

Chemistry
Technically this is a VERY tough probem and can't be answered with the information given. However, I assume that the person making up the problem meant that 0.1 mol HCl was added to enough water to make 1L of solution. (H^+) = (HCl) since HCl is 100% ionized. (H^+) = 0.1 mols/...
Tuesday, May 14, 2013 at 12:37pm by DrBob222

chemistry
Calculate the molarity of each. a. 1.50 mole of NaCl in 8.00 L of solution 0.188 M NaCl b. 270 mg of NaCl in 3.00 mL of solution 90 M NaCl
Wednesday, February 22, 2012 at 6:25pm by krystal

Chemistry
1.0L of aqueous solution in which [H2CO3]=[HCO3^-]=0.10M and has [H^+]=4.2E-7. What is the concentration of [H^+] ofter 0.005 mole of NaOH has been added? H2CO3 ==> H^+ + HCO3^- k1 = (H^+)(HCO3^-)/(H2CO3) I don't know if you are supposed to calculate or to look up k1. ...
Tuesday, August 7, 2007 at 7:26am by Vic

chemistry help plzzz
how can i calculate the pH of the solution obtained when 50.00mL of 0.150mol/L hydrochloric acid is added to 75mL of a 0.111 mol/L aqueous sodium hydroxide solution. need help i am stuck with that question thank you :)
Friday, December 24, 2010 at 5:19pm by tarkan

chemistry
Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is neither acidic or basic, ...
Tuesday, March 11, 2014 at 2:25am by Sandy

Chemistry/pH- Weak Acid
Hi again! I have a new question, Can you help me? Consider 50.0 mL of a solution of a weak acid HA (Ka = 1.00.E-6), which has a pH of 4.000. What volume of water must be added to make the pH = 5.000? My Calculations: To calculate the concentration of x, I take the pH value -&...
Sunday, August 17, 2008 at 6:07am by Mary

Chem.
The concn of what in the diluted solution? the original sample or the ASA in the original sample? And what kind of units for the concn? The original sample is (0.400 g/250 mL) x (3 mL/100 mL) = ?? g/mL If you want the concn ASA, you start with 0.4 x 0.682 = ?? and use that ...
Saturday, April 18, 2009 at 2:18am by DrBob222

chemistry
The Beer-Lambert Law. A = abc. Use A = abc for the standard to calculate the constant, a (the absorptivity). b = cell length (but you don't need to use that IF both standard and unknown were measured using the same cell. Then use A= abc on the unknown to calculate FeSCN^+2 in ...
Monday, April 14, 2008 at 1:56pm by DrBob222

chemistry
A 250.0 mL sample of an aqueous solution at 25 degrees Celsius contains 35.8 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 11.25 mmHg, what is the molar mass of the unknown compound? a.) 237 g/mol b.) 484 g/mol c.) 351 g/mol d.) 699 g/mol...
Tuesday, October 2, 2012 at 9:19pm by Bru

chemistry
Consider 18.0 M H2SO4, if you need to make 250.0 mL of a 3.0 M solution of H2SO4, how would you do this? 18.0 M H2SO4 has a density of 1.84g/mL what is the molality of solution? Mass % of H2SO4 in the solution and the mol fraction of H2SO4 and water in the solution?
Monday, April 29, 2013 at 11:40pm by Marie

Chemistry
Consider 18.0 M H2SO4, if you need to make 250.0 mL of a 3.0 M solution of H2SO4, how would you do this? 18.0 M H2SO4 has a density of 1.84g/mL what is the molality of solution? Mass % of H2SO4 in the solution and the mol fraction of H2SO4 and water in the solution?
Tuesday, April 30, 2013 at 1:50pm by Marie

CHEM
a solution containing 30 g of nh3 in 70 g of water has a density of 0.882 g/ml. what is the molarity and molality
Sunday, December 12, 2010 at 11:03am by MAX

Chemistry
23.7 grams of glucose(C6H12O6) are added to water to give a 246 ml of solution. what is the Molarity
Tuesday, May 31, 2011 at 11:35pm by Jackie

Chemistry
If 50.0mL of 1.60M HCl was added to 50.0mL of 1.80M NaOH, calculate the molarity of the resulting NaCl solution. (Hint: resulting solution has a volume of 100 mL)
Thursday, April 1, 2010 at 1:23am by Michelle

Chemistry
If 50.0mL of 1.60M HCl was added to 50.0mL of 1.80M NaOH, calculate the molarity of the resulting NaCl solution. (Hint: resulting solution has a volume of 100 mL)
Thursday, April 1, 2010 at 10:55am by Jen

chemistry
What is the molarity of 100 ml of ethanol dissolved in 1.5 liters of water? Ethanol has a specific gravity of 0.789, and its molecular weight is 46 g/mol.
Friday, March 16, 2012 at 10:20am by Louise

chemistry
Find out the molarity of the solution. Then use M1V1 = M2V2, where M is the molarity.
Wednesday, July 31, 2013 at 7:31am by chemist

chemistry help!
I have a chemistry test tomorrow and I'm trying to study but none of these questions in the book make sense to me:( Help! 1. Commericially available concentrated sulfuric acid is 95% H2SO4 by mass and has a density of 1.84g/mL. How many milliliters of this acid are needed to ...
Sunday, October 18, 2009 at 12:53pm by Maycee

Chem
This is the problem: In a 1-L beaker, 203 ml of 0.307 M ammonium chromate was mixed with 137 ml of 0.269 M chromium (III) nitrite to produce ammonium nitrite and chromium (III) chromate. Write the balanced chemical reaction occuring here. If the percent yield of the reaction ...
Monday, October 30, 2006 at 8:05pm by Anonymous

Chemistry
I would do this through another route;I agree with Devron with 0.302g Na2SO4 used and the percentage comes out the same but uses different approaches.. Take you pick. 1.281 = g Na2SO4 initially. Some of that reacts to form Na2SO4.10H2O and some of it remains as Na2SO4. We need...
Wednesday, February 20, 2013 at 3:38pm by DrBob222

Science
That depends on the density of the object along with bouyancy. A 2g rock will sink in water whereas a 2000 kg boat will not (if made right). It doesnt matter what something weighs. An object floats because it displaces an amount of water equal to or more than its own weight. A...
Thursday, April 22, 2010 at 5:03am by Nick

chemistry
Calculate the heat of formation of water from its constituent elements from the following information: 3 H2 (g) + O3 (g) 3H2O ∆H = ? 2 H2 (g) + O2 (g) 2H2O ∆H = - 483.6 3 O2 (g) 2O3 (g) ∆H = 284.5 a. -480 kJ/mol b. 480 kJ/mol c. -867 kJ/mol d. 867 kJ...
Saturday, April 18, 2009 at 5:13pm by lil'mama

chemistry
How would I calculate the molarity of the resulting solution if 25.0mL of 1.50 M HCL solution is diluted to 500 mL. I know you have to change the milliliters to liters by dividing by 1000 and I know that M= Moles of Solute/Liters of Solute but after that I'm lost. Please help!
Friday, July 1, 2011 at 4:13pm by Daniel

Chemistry
Tartaric acid has two acidic (ionizable) hydrogens. The acid is often present in wines and precipitates from solution as wine ages. A solution containing an unknown concentration of the acid is titrated with NaOH. It requires 22.62 mL of 0.2000 M NaOH solution of titrate both ...
Monday, October 10, 2011 at 7:37pm by Destiny

Chemistry - Solution Stoichiometry
CuSO4(aq) + Ni ==> NiSO4(aq) + Cu mass Ni used = 15.5 - 11.4 = ??g Ni. Convert mass Ni to mols Ni. mols = grams/molar mass. Mols Ni = mols Cu (from the equation which tells you 1 mol CuSO4 = 1 mol Ni). mols Cu = mols CuSO4 (since 1 mol Cu is in 1 mol CuSO4). molarity CuSO4...
Wednesday, April 2, 2008 at 10:02pm by DrBob222

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
Sunday, February 9, 2014 at 3:47pm by Mary

chemistry who helps me for me
A 0.887g sample of a mixture of nacl and kcl is dissolved in water , and the solution is then treated with an excess of agn03 to yield 1.913g of agcl. Calculate the percent by mass of nacl in the mixture 1.913/143g/mol = 0.01337 who helps me
Saturday, January 18, 2014 at 11:46pm by Ferda

chemistry
A 0.0875 M solution of aqueous ammonia was titrated with a solution of sulphuric acid. If 25.00 mL of the ammonia solution required 30.66 mL of the acid to reach the end-point, calculate the molarity of the acid. NH3(aq) + H2SO4(aq) (NH4)2SO4(aq)
Thursday, January 10, 2008 at 6:56pm by caleb

chemistry
a 1.009g mixture of the solid salts Na2SO4 and forms an aqueous solution with the precipitation of PbSO4. The precipitate was filtered and dried and its mass was determined to be .471 g. the limiting reactant was determined to be Na2SO4. Write the molecular form of the ...
Tuesday, March 23, 2010 at 9:15pm by Ann

Chemistry
I am confused about where I am going wrong here... Suppose that 1.331 g of impure barium hydroxide is dissolved in enough water to produce 250. mL of solution and that 35.0 mL of this solution is titrated to the stoichiometric point with 17.6 mL of 0.0935 M HCl(aq). What ...
Saturday, March 13, 2010 at 6:23am by Val

chemistry
what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?
Saturday, December 8, 2012 at 2:59pm by samantha

chemist
What is the concentration of the hydroxide ion in a solution if 0.12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?
Sunday, April 28, 2013 at 1:41pm by Linnessa

Chemistry
A 0.753 m solution of the solute CH3CN dissolved in the solvent C6H6 is available. Calculate the mass ( g ) of the solution that must be taken to obtain 3.274 mol of CH3CN. Additional info: Molar Mass (g/mol) CH3CN 41.05 C6H6 78.11 Density ( kg/L ) CH3CN 0.7857 C6H6 0.8786 ...
Saturday, May 8, 2010 at 9:09pm by Kyo

chemistry
You want to weigh out 10 g NaOH and add enough water to make a total of 100 g for a 10% solution. Since you want 500 g of solution, just multiply both solute and solvent by 5.
Friday, March 4, 2011 at 7:39pm by DrBob222

chemistry(Urgent Please help)
A student is asked to standardize a solution of barium hydroxide. He weighs out 0.945 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 33.9 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the barium hydroxide ...
Sunday, November 20, 2011 at 3:53pm by Hannah

chemistry please
molarity of a solution containing 5mL of a 3.512 x 10^-5M solution (made from .128g of benzophenone and 50mL of ethanol) and then filled to the 50mL line of ethanol would this be (3.512 x 10^-5)(-.04) ?
Sunday, February 1, 2009 at 3:21pm by john

College Chemistry Lab
Suppose that a 2.50x10^-6M solution of red dye No. 2 had an absorbance of 0.585 at its wavelength of maximum absorbance. A second solution of red dye No. 2 is too concentrated to read its absorbance so 5.00 mL of the concentrated dye solution was diluted with water to a volume...
Tuesday, March 16, 2010 at 7:29pm by L**

chemistry
You have not shown us how you got that answer. Method you could use: moles = (liters)(molarity) mol. HCl = (0.645L)(0.266mol/L) = _____ mol HCl (____ mol HCl)(35.453g/mole) = ______?
Thursday, May 28, 2009 at 7:00pm by GK

chemistry
Part A 6.0010−3 mol of HBr are dissolved in water to make 16.0L of solution. What is the concentration of hydroxide ions,[OH-], in this solution? Express your answer with the appropriate units.
Thursday, November 15, 2012 at 7:32pm by Deane

Chemistry
A 5.00-gram sample of glucose, C6H12O6, [molar mass = 180.] is dissolved 10.0 grams of water What is the molality of the glucose solution? Calculate the boiling(BP) and freezing points(FP) of this solution to the nearest 0.1 C. The vapor pressure of pure water at 30C is 25.0...
Saturday, January 15, 2011 at 10:26pm by Mark

chemistry
A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)
Thursday, November 1, 2012 at 4:18pm by jack

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 ...
Saturday, June 4, 2011 at 12:58pm by Christy

chemistry
I assume 0.1NH2SO4 really is 0.1N H2SO4. What are you looking for in the answer? Normality? molarity? acidic? basic? H2SO3 + Na2SO4? what?
Friday, August 17, 2012 at 7:10am by DrBob222

chemistry
The following data were collected at the endpoint of a titration performed to find the molarity of an HCl solution: Volume of acid (HCl) used = 14.4 mL; Volume of base (NaOH) used = 22.4 mL; Molarity of standard base (NaOH) = 0.200 M; What is the molarity of the acid solution...
Monday, November 29, 2010 at 12:00am by vin

Chemistry
Calculate Ecell (in volts) for a fuel cell that employs the reaction between methane gas and oxygen to form carbon dioxide and water. (to 4 significant figures) ∆G⁰f for CH4 = -50.5 kJ/mol ∆G⁰f for CO2 = -394.4 kJ/mol F = 96485/mol e- I got 0.4455 V ...
Friday, April 12, 2013 at 4:09am by Anonymous

chemistry
If the 12.5ml of NaOH solution is required to react completely with 0.300g of KHP (Potassium Hydrogen Phthalate, 204.2g/mol). What is the molarity of NaOH?
Tuesday, December 11, 2012 at 3:57pm by paul

chemistry
for the vaporization of water at 1.00 atm, delta H=43.54 kj/mol at 298 K and delta H= 40.68 kj/mol at 373 K. the constant-pressure heat capacity of liquid water is 75.3 J/molK. calculate the constant pressure heat capacity for H2O(g).
Monday, May 9, 2011 at 1:09pm by anna

chemistry
The molarity of an aqueous solution of barium hydroxide is determined by titration against a 0.335 M nitric acid solution. If 32.8 mL of the base are required to neutralize 21.5 mL of nitric acid, what is the molarity of the barium hydroxide solution?
Tuesday, April 1, 2014 at 4:32pm by Anonymous

molarity
what is molarity when 12L of water contains 3.4mol of CO gas
Wednesday, December 10, 2008 at 11:51pm by cha'nae

Chemistry
Thank you very much. The molarity of the NaOH solution is 0.162. So I did the following: 25.00 mL NaOH*(1 L / 1000 mL)*(0.160 mol NaOH / 1 L NaOH)*(1 mol CH3COOH / 1 mol NaOH) = 0.004 mol CH3COOH (0.004 mol CH3COOH / 5.00 mL) * (1000 mL / 1 L) = 0.8 M CH3COOH Now I'm supposed ...
Wednesday, March 4, 2009 at 10:23pm by Jake

Chemistry
What is the molarity of the vinegar solution? 5% means 5 g acetic acid/100 g solution. 5 g acetic acid is ?? moles? moles = grams/molar mass 100 g is how many mL? Use density. Then molarity = M = mols/L soln. After you know the molarity of 5% acetic acid, then mL x M = mL x M.
Tuesday, November 9, 2010 at 4:40pm by DrBob222

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.
Wednesday, December 5, 2012 at 6:49pm by Chris

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...
Monday, October 5, 2009 at 7:48pm by Rose

Chemistry
A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of the acetic acid solution. Please show all steps, I don't understand this.
Monday, May 23, 2011 at 5:51pm by Tina

Chemistry
A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. What is the mass percent of isopropanol? What is the molality of isopropanol? i've done it a couple times now and i must have something off
Monday, October 18, 2010 at 5:59pm by Luke

chemistry
calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)
Sunday, April 29, 2012 at 9:49pm by Randy

chemistry
calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)
Sunday, April 29, 2012 at 9:49pm by Randy

chemistry
what mass, in grams of nacl formed from the reaction of 2.75ml of a 6.00M Na2SO4 solution and 8.30ml of a 2.50M solution of HCL
Friday, November 15, 2013 at 11:06am by bayor

Pages: <<Prev | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | Next>>

Search
Members