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March 5, 2015

Search: An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52.5 mL of 6 M HCl. Calculate the concentration of the diluted NaOH solution

Number of results: 56,365

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!
July 1, 2011 by Daniel

chemistry
Why is an Fe3+ solution instead of an Fe2+ solution used in calibrating the spectrophotometer? Note: hydroxylamine hydroxide is added to the Fe3+ solution then 1,10 phenanthroline is added to the solution after the addition of hydroxylamine hydroxide. After these additions, a ...
September 15, 2007 by smiley

chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)
February 2, 2011 by belinda

chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)
February 2, 2011 by belinda

science
The enthalpy of solution of KBr in water is about +198 kJ/mol. Nevertheless, the solubility of KBr in water is relatively high. Why does the solution process occur even though it is endothermic
January 17, 2013 by Samantha

science(chem)
Commercial hydrazine is sold as a 64% solution. Using that as your starting material, how would you prepare a 5% solution of hydrazine? well if it is sold as 64% solution would that mean that it has 64g of hydrazine per 100ml of solvent(water)? and what they want in the end is...
May 5, 2008 by ~christina~

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 ...
June 21, 2012 by Abby

Chemistry
Include an explanation, balanced chemical equation, units, significant figures and/or calculations where appropriate. Standardization of NaOH Solution Trial 1: 0.501 g KHC8H4O4 15.22 mL NaOH Trial 2: 0.503 g KHC8H4O4 15.11 mL Trial 3: 0.500 g KHC8H4O4 15.10 mL Using the data ...
March 2, 2009 by Jake

chemistry
A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at 55 C. The vapor pressure of pure water at 55 C is 118.0 torr. The MW of lactose is 342.3 g/mol. What is the partial pressure of water above the solution?
November 7, 2011 by Anonymous

chemistry
To clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 mL of solution. What are the pH and pOH values for the solution?
April 6, 2008 by Ross

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?
August 5, 2009 by ChemHurts

chemistry.
2.02g of KNO3 ( Mz=101) is dissolved in sufficient water to prepare 0,500 dm3 of solution. What is the concentration of this solution in mol dm?
November 5, 2009 by Mark

chemistry
to clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 ml of solution what are the pH and pOH values for the solution?
April 18, 2010 by Caitlin

Chemistry
what is the molarity of a solution prepared by dissolving 222 g of sodium carbonate in enough water to make a solution volume of 3250 mL's?
July 9, 2010 by Heather

Chemistry 1200
For each of these solutions, determine the boiling point of the solution 0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)
January 25, 2011 by Rukky

chemistry
Calculate the concentration (% W/V) of NaCl solution that was made by dissolving 15.0 g of sodium chloride in enough water to make 300.0 mL of solution.
October 29, 2011 by Chemistry Chick

Chem 2
What is the molarity of a solution composed of 8.210g of Potassium Chromate (K2CrO4),dissolved in enough water to make .500 L of solution
December 17, 2012 by Cassidy

chemistry
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution.
January 16, 2013 by Anonymous

chemistry
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution.
January 16, 2013 by Anonymous

chemistry
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution.
January 16, 2013 by Anonymous

Chemistry
Calculate the molarity of a solution made by dissolving 16.0 grams of Na2CrO4 in enough water to form exactly 555 mL of solution.
March 13, 2013 by Sam

chemistry
What is the molarity of a solution composed of 2.23 g of potassium iodide (KI) dissolved in enough water to make 0.181 L of solution? Answer in units of M
February 25, 2014 by Roberta

science
When 4.56 g of a nonelectrolyte solute is dissolved in water to make 275 mL of solution at 22 C, the solution exerts an osmotic pressure of 873 torr.
April 25, 2014 by eva

chemistry
a solution is made by mixing 38.0 ml of ethanol C2H6O, 62.0mL of water. assuming ideal behavior, what is the vapor pressure of the solution at 20 C
October 10, 2014 by cindy

Chemistry
a solution made by dissolving 2.733g KH2PO4 and 4.508g K2HPO4 in water to give 250 ml of solution. is the answer... 7.432= ph
February 7, 2015 by yes

college chemistry
Calculate the pH of a solution prepared by mixing 150.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 37.5 g of an aqueous solution that is 1.3% NaOH by mass (density=1.02 g/mL)
March 24, 2011 by does anyone get this???

General Chemistry
A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution? 0.0197 g 0.0394 g 0....
October 12, 2010 by Dave

Chemistry
A 8.71 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid. If 25.0 mL of 0.388 M barium hydroxide are required to neutralize the hydroiodic acid, what is the percent by weight of hydroiodic acid in the mixture? I understand how to solve ...
November 20, 2011 by Hannah

Chemistry
7.0 ml of 6.0 M NaOH are diluted with water to a volume of 400 ml. You are asked to find the molarity of the resulting solution. The total number of moles of NaOH is not changed on dilution. Calulate the molarity. Work: (6)(.007)=(x)(.4) x=.105M Thanks for showing your work. I...
April 19, 2007 by Anonymous

Chemistry
what is the molecular weight (G/mol) of a diprotic acid 0.43 sample that needed 35.46 ml of 0.100 M of NaOH solution to reach a phenolphthalein point?
January 24, 2011 by Judy

science(chem)
I'm making different concentrations of ethanol and I just wanted to check my calculations and method. Making ethanol concentrations of: 0.40% 0.30% 0.20% 0.10% 0.05% To make the 0.40% ethanol from stock solution using 100ml volumetric flask: (xg ethanol)/(100ml) x 100= 0.40% ...
October 1, 2008 by ~christina~

Algebra
How do I set up and solve this problem? 100% acid is to be added to 10% acid solution to obtain 90 liters of 48% solution. (a) What amount of 100% of acid should be used? (b) What amount of 10%?
May 1, 2012 by Taurus

chemistry
If 1.70 liters of 0.670 M CuSO4 solution is electrolyzed by passing 4.70 amps through the solution for 3.00 hr using inert electrodes. (a) As electrolysis proceeds, how does the acidity of the solution change? (b) How many grams of Cu metal are formed at the cathode? (c) How ...
November 19, 2010 by Dana

chemistry
Assuming the density of a 5% acetic acid solution is 1.0 g/mL, determine the volume of the acetic acid solution necessary to neutralize 25.0 mL of 0.10 M NaOH. Record this calculation on your report sheet.
June 29, 2010 by love

CHM
Assuming the density of acetic acid solution is 1.0 g/mL, determine the volume of the acetic acid solution necessary to neutralize 25.0 mL of 0.10 M NaOH. Record this calculation on your report sheet
January 25, 2011 by JACK

College Chemistry
Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous solution that is 1.50% NaOH by mass (density= 1.02g/mL).
March 23, 2011 by Anonymous

chemistry
A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- --> 2 MnO4 + K2SO4 + 8 H2O. The gram...
January 5, 2010 by amy

CHEMISTRY
Assuming the density of a 5% acetic acid solution is 1.0 g/mL,determine the volume of the acetic acid solution necessary toneutralize 25.0 mL of 0.10M NaOH.
August 25, 2010 by Jeffrey

algebra
how much of a 25% solution should to be added to 35% solution to get 40 liters of 28% solution
July 21, 2009 by jeff

AP Chemistry
50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solution?
January 30, 2014 by Gabriella

Chemistry
In lab we determined the heat capacity of a calorimeter. The question is how would the heat capacity of the calorimeter be affected if the NaOH solution had been at 25 degrees Celsius and the HCl solution had been at 22 degrees Celsius when the two solutions were mixed? Would ...
November 1, 2010 by Katy

chemistry
The fifth standard solution to be made and analyzed consiss of 10 mL of the 10ppm Fe3+ stock solution along with a total of 5 mL from the other solutions. What is the concentration of this diluted solution?
August 2, 2009 by Christian

chem
If you have a .045 M solution of sodium hydroxide, how many mL of the solution do you need to neutralize 6.5 mL of a .055 M sulfuric acid solution? do i use the equation M1V1 = M2V2?? or is that for dilutions
September 6, 2009 by sam

Honor Biology
Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?
December 6, 2010 by Pam

Chemistry
Is this answer correct? Calculate the molar concentration of sodium hydroxide solution if 36.00mL of this solution were required to neutralize 25.00 mL of a 0.2000 M solution of hydrochloric acid. .0288M??????
May 25, 2011 by jordan

math-calculus
solving equations with two absolute value brackets |x+4| = |x-2| so i want to know how to do this? do i always have to write out the four piecewise possibilities? that be ++ -+ and +- ++ x+4 = x-2 4 = -2 not solution -+ -(x+4) = x-2 -x-4 = x-2 -4 = 2x-2 -1 = x solution +- x+4...
January 18, 2012 by Shreya

Algebra I
to determine whether a given number is a solution of an equation. Problem: Is 5 a solution of 10x-xto the 2nd power = 3x-10? my work: 10(5)-25=25 and 50-25=25 so x is not a solution. right or wrong? Im new at this
September 9, 2014 by Nancy

Chemistry
The ΔH per mole of CaCl2 is -81.0 kJ. Calculate the final temperature of an aqueous solution if 30 g of CaCl2 are added to 100 g of water at 23oC. Assume that the specific heat of the solution is the same as that of water
October 7, 2010 by Felicia

Chemistry (Regents level)
1- In the reaction Fe2O3 + 3 CO = 2 Fe + 3 CO2, what is the total number of moles of CO used to produce 112 grams of iron? a) 1.0 b)2.0 c)3.0 d)4.0 2- Given the reaction: 4Al + 3O2 = 2Al2O3 How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2? a...
February 23, 2008 by Jessica

Chemistry
After calculating the mass of NaOH to make the approximate 0.2mol/L solution, why is it not crucial to weigh out an exact amount?
January 2, 2011 by Chantelle

Chem
Do my answers look correct for these? Thanks Calculate the mass percent of a solution containing 45.6 grams ethanol (C2H6O) in 245 grams of water. 15.7% You are asked to make 500.0 mL of a 4.5M solution of HCl, but the only HCl you have available to dilute is 18.0M. Describe ...
December 7, 2009 by Matt

Chemistry
If 25.0mL of sodium nitrate solution (0.100mol/L) is added to 10.0mL of sodium carbonate solution (0.150 mol/L), what is the concentration of sodium ions in the resulting mixture? Assume the volumes are additive.
May 13, 2009 by Tom

Chemistry
A 0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 10-4 M. What is the equilibrium constant, Ka, for this acid? a. 5.0 10-2 b. 5.0 10-3 c. 2.5 10-4 d. 2.5 10-5 e. 2.5 10-6 2. (Points: 1) What is the carbonate-ion, CO3-2, ...
May 13, 2010 by write2khin

pre-calculus
solve the exponential equation. express the solution in terms of natural logarithims. Then, use a calculator to obtain a decimal point approximation for the solution. e^x=12.3 What is the solution in terms of natural logarithims? The solution set is ?
October 6, 2012 by ladybug

chem
What is the color of a solution that contains two drops of ohenolphthalein in acideic solution? What is the color in basic solution? My answer is the color in acidic turns colorless in basic solution the color will be pink. Pls. correct me if i'm wrong.
November 29, 2012 by Angel Locsin

chemistry
A buffer system is created by neutralizing the supernatant solution containing Pb^2+, Fe^3+, Al^3+, Ca^2+, Cu^2+, and K^+ ions with 6M NH3 solution and then adding an equal volume of 6M NH3 solution. Explain what forms of 6M NH3 were present in the final solution, their ...
November 7, 2012 by Anonymous

chemistry8
1.why must MgCl2.6H20 be added to the EDTA solution? 2. why should EDTA solution be stored to the polyethylene container? 3. why should HCl be added to calcium carbonate solution? 4. why is it necessary to buffer the solution at pH 10 during titration?
July 17, 2010 by tan ni

chemistry
You want to measure the oxalic acid contents in 20 ml of a solution. To this end, you add 100 mmol sodium dichromate to the solution. Then you titrate the remainder of the dichromate with a Fe2+ solution of 1 mM, of which you need 11 ml. What was the concentration of oxalic ...
November 26, 2010 by Anonymous

Chemistry
Please help, I can't do this and its stressing me out ?!?! A 25.0 mL aliquot of an aqeuous quinine solution was diluted to 50.0mL and was found to have an absorbance of 0.832 at 348nm when measured in 2.00cm cell. A second 25.0mL aliquot was mixed with 10.0ml of a solution ...
January 10, 2015 by Daniel

Chemistry
You have a reaction using the following criteria: 1.3456 g of barium chloride solution (0.786M) is mixed with 1.20089 g of sodium sulfate solution (1.3M). The ambient pressure is 754.564 mmHg and the temperature is 56.889 degrees celsius. Determine the volume of the gas produced.
April 26, 2011 by Katie

Biology
What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will become clogged with the ...
October 24, 2013 by David

chem lab (webwork)
What is the pH of the solution created by combining 1.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH pH wHCl pH wHC2H3O2 1.80 Complete the table below: What are the pH values if you take into account that the 8....
April 13, 2010 by anonymous

Science : Chemistry
The concentration of dissolved chlorine in tap water can be determined by adding excess potassium iodide and then using aqueous sodium thiosulphate to precipitate the resulting iodide ions. In Ontario, the aesthetic objective for chlorine in tap water is a maximum ...
December 10, 2011 by Maame

chemistry
You mix 50.0 ml of 2.0 M HCl and 50.0 ml of 2.0M NaOH. The temperature of the resulting solution increases from 22.5 degrees celcius to 32.3 degrees celcius. What is the q of the calorimeter
October 12, 2014 by Anonymous

MAC1045
What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added to a 50.00 mL sample of 0.250 NaOH(aq). The initial temperature is 19.50 degrees C and the
April 21, 2011 by Julian

chemistry
Consider a buffer solution consisting of CH3NH3Cl and CH3NH2. Which of the following statements are true concerning this solution? (Ka for CH3NH3+ = 2.3 x 10 -11). 1. A solution consisting of 0.1 M CH3NH3Cl and 0.1 M CH3NH2 would be a more effective buffer than one containing ...
March 25, 2014 by bekah

CHEM:
caluclate the volume in mL of 1.74 grams of sodium chloride from a 0.270 M solution 1.74g sodium chloride from a 0.270 M solution 7.10g ethonal from a 2.45 M solution 6.90g acetic acid (CH3COOH) from 0.606 M solution
June 9, 2012 by April

Chemistry
Pure ethanoic acid (25.0cm3, CH3COOH), pure ethanol (35.0 cm3, C2H5OH) and pure water (20.0cm3, H2O) were mixed in a sealed flask at room temperature. The flask was placed in a heated water bath and maintained at 323K until equilibrium was established. CH3COOH(aq) + C2H5OH(aq...
May 1, 2012 by Henry

chemistry
a 150ml sample of wetlands water requires 25.00 mL of a 0.0250 MH2SO4 solution for neutralization. Calculate the molarity of CaCO3 in the sample
April 7, 2010 by tom

chemistry
assuming the density of a 5% acetic acid solution is 1.0g/ml, determine the volume of the acetic acid solution necessary to neutralize 25.0 ml of 0.10 m NaOH. also record this calculation on your report sheet.
October 22, 2009 by janvi

Chemistry
Given a solution of ammonium chloride. What additional reagent or reagents are added to prepare a buffer from the ammonium chloride solution? I know the answer is NaOH but I don't know why. Can someone explain this to me please?
December 14, 2010 by Ana

Chemistry
If a 25.0 mL sample of 0.500 M HCl solution were diluted 125-fold, what would be the volume and concentration of the diluted solution?
April 4, 2011 by Chris

Chemistry
A 5.0−L sample of a 5.4M NaCl solution is diluted to 70L . What is the molarity of the diluted solution? How would you set this up and answer it?
May 1, 2014 by AF

Organic Chemistry
A 0.160 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.20 in a 1-dm sample container. The molar mass of the compound is 128.0 g/mol. (a) What is the specific rotation of D? (b) What is the observed rotation if this solution is mixed ...
September 29, 2014 by Trish

Chemistry
Select the statements that correctly describe buffers.? 1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. 2) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution. 3) The pH of a ...
September 23, 2013 by Aria

Chem
When an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate ______. A. a precipitate form B. a new salf is formed C. a gas is evolved D. an acid and base are formed E. no reaction occurs
October 24, 2007 by Taylor

Chemistry
A solution consisting of 25.00 g Nh4Cl in 178 ml of water is titrated with 0.114M KOH. How many mL of KOH are required to reach the equivalence pt?
March 24, 2011 by Ashley

chem101
If a solution contains 0.0100 mole of HCl in 10.0 mL aqueous solution. a.) What is its molarity? My answer is 1M (0.0100 mole/10.0 mL * 1000 mL/1L = 1M) b.) What is H^+ ion concentration for this solution? c.) What is the expected pH for this solution? pls help i don't know ...
November 28, 2012 by audrey12

introductory chemistry essentials
A 3.5 Liter sample of 5.8 M NaCL solution is diluted to 55 Liter. What is the molarity of the new solution?
November 30, 2014 by Anonymous

HARD chemistry
A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- --> 2 MnO4 + K2SO4 + 8 H2O. The gram-...
January 4, 2010 by Amy

chemistry
Two solutions were prepared. The first was a 0.672 M solution of aluminum hydroxide and the second was a 0.405 M sulfuric acid solution. 1.) If a total of 500 mL of aluminum hydroxide solution was prepared, how many grams of the solute (AL(OH)3) would have been weighed out in ...
May 7, 2014 by Jordan

Chemistryy....PLEASE HELPP HAVE MIDTERMMM
A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic solution? Assume the ...
October 12, 2008 by Sara

physiscs
A 10g sample of an unknown ionic compound is dissolved, and the solution is treated with enough AgNO3 to precipitate all the chloride ion. If 30.1 g of AgCI are recovered, which of the following compound could be the unknown? A. NaCI B. NaNO3 C.BaCI2 D. Mg CI2 E.KCI Pleas help...
November 14, 2010 by Jay

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution? I've got answer to the ...
May 26, 2011 by Ana

chemistry pls help me asap
100cm^3 of a sodium hydroxide,NaOH solution contains 4.0g of solid sodium hydroxide,NaOH.40 cm^3 of phosphoric acid,H3PO4 is needed to neutralise 40cm^3 of the alkali.(RAM:H,1;O,16;Na,23;P,31) (a)Calculate the molarity of the sodium hydroxide,NaOH solution. (b)Calculate the ...
May 7, 2014 by mandy

chemistry 112
A volume of 60.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 19.2mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l) Express the ...
October 7, 2014 by Sam

chemistry
how many grams of NaOH must be added to 0.250 litres of water to form a solution of PH=10.0?
September 7, 2010 by joey

chemistry
How many moles of water form when 40.0 ml of .800 M HNO3 solution is completely neutralized by NaOH?
September 12, 2010 by mary

chemistry
What is the mass of naoh needed to prepare a 0.365m solution dissolved in 1525ml of water
May 19, 2012 by warren

Chemistry
if 20.00 grams of NaOH are diluted in enough water to make 1.00 liter, what is the molarity of the solution?
December 5, 2012 by Anonymous

CHEMISTRY
How do you get the concentration with buret readings? What would the concentration of HC2H3O2 (M) be? For example, Molarity of the NaOH solution: 0.2619 M Final buret reading: 31.10 ml Initial buret reading: 0 Volume of NaOH solution: 31.0 ml concentration of HC2H3O2 (M...
March 20, 2013 by Anna

Chemistry
Phenol (abbreviated HOPh) is a weak acid with a Ka= 1.29 X 10^-10. What is the pH of a mixture made by mixing 100.0 ml of a 0.700 M solution of phenol with 70.0 ml of a 1.00 M solution of NaOH? Help please and please show work... I'm so confused.
May 12, 2009 by Chelsea

chemistry
Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would prepare this solution. Include any calculations that you would perform.
October 14, 2010 by Dexter

Geometry&trigonometry
consider the polar graph =(2/3). (=pie) find the value of N such that r=N, where 0 N has a)no solution b)one solution c)two solution i think i have figured the first question out.since it's no solution then N must be N<(2/3) because the equation is =(2/...
October 24, 2007 by Pauline

CHEMISTRY
brass is a subtitutional alloy consisting of a solution of copper and zinc. a particulae sample of red brass consisting of 80% copper and 20% zinc by mass has a density of 8750kg/m^3. a. what is the molality of zinc in the solid solution and B. what is the molarity of zinc in ...
October 14, 2010 by lulu78

9th grade science
A strong acid, HBr, has been dissolved into a beaker of water. If the solution is known to be 0.000 001 M, what is the pH solution?
March 11, 2011 by Amy

Chemistry
When 1 mol of gaseous hydrogen chloride is dissolved in enough water to make 1 L of solution, approximately how many HCl molecules remain in the solution?
May 15, 2011 by Joe Schmo

Chem 121
A solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 260.0 mL. What is the molarity of the solution?
July 26, 2011 by Barbara

college general chem
If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? How many milliliters of 4.4510−2 contain 4.05 of solute
October 3, 2011 by ronie

Chemistry
What will be the concentration if 52 milliters of a solution that is 12 parts per million in sodium chloride is diluted with enough water to make 97 millilters of solution?
February 14, 2012 by Whitney

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