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May 30, 2015

Search: Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12.

Number of results: 65,495

Biology
How many grams of the molecule in the figure above would be required to make 1 L of a 0.5 M solution of the molecule? H O | || (looks like C=O on the vertical) H-C-C-O-H | H a.29 b.30 c.60 d.150 e.342
December 11, 2008 by Emma

Chemistryy
what mass of silver nitrate (AgNO3) is required to prepare 400 grams of a 3.50% solution of AgNO3? Options: 1. 0.00875 g 2. 114.28 g 3. 1400 g 4. 14 g
July 13, 2010 by alexandra

chemistry
You wish to prepare a 10% CaCl2 solution. Only CaCl2 * 10H2O is availalbe. How many grams of the hydrated compound are required for 250ml of the reagent? Ca=40 Cl=35.5
September 5, 2010 by j

Chemistry
How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.
October 11, 2010 by Mike

Chemistry
How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.
October 11, 2010 by May (PLEASE HELP)

CHM formula needed, pls?
How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.
November 19, 2012 by Vc

chemistry
How many grams of kmn04 are contained in 35ml of 0.05N kmn04 used in the following reaction in basic solution. the answer 0.0922g who helps
February 9, 2013 by Fai

chemistry
How many grams of copper will be deposited at the cathode of an electrolytic cell if a current of 680.0 mA is run through a 2.5 M solution of copper sulfate for 20.0 minutes?
May 5, 2014 by bekah

Chemistry
How many grams of CaCl2 are needed to make 100ml of a 15% solution in water if only the dihydrated (CaCl2⋅2 H2O) salt is available?
May 18, 2014 by Yue

chemistry
How many grams of Cu (s) are needed to form 6.00g Ag from a solution of AgNO3? The reaction is Cu (s)+2Ag^+(ag)--> Cu^2+(aq)+2Ag (s) the molar masses are: Ag=107.868 and Cu=63.546g
September 14, 2014 by darya

chemistry
When 0.25M (Molarity) aqueous solutions of ammonium chloride and lead (II) nitrate are mixed a precipitate forms. How many grams of solid would be produced by mixing 250 mL of each solution?
January 5, 2011 by Palak

Biology
how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve
April 8, 2014 by Amber

BIOLOGY
how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve
April 8, 2014 by Amber

Chemistry 1150
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH4NO3(s)→NH+4(aq)+NO...
February 25, 2014 by Smith

Chemistry
Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1 mol N2 and the partial...
January 31, 2014 by Anonymous

Chemistry
Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1 mol N2 and the partial...
February 3, 2014 by Anonymous-PLEASE HELP!!

chemistry
formic acid is a weak acid with a ka value of 1.8x10^-4 at 25 celsius a solution with a concentration of .424M formic acid is prepared in a laboratory. 1) Write the ionization equation for an aqeous solution of formic acid 2)determine the ph of the solution prepared above. i ...
February 12, 2015 by zack

math
Decide whether the each equation has one solution, no solutions,or infinitely many solutions. 1. 2(x-3)= 2X A.One solution B.No solutions C.Infinitely many solutions 2. 3(y-3)= 2y-9+y A.One solution B.No solutions C.Infinitely many solutions 3. 10x-2-6x = 3x-2+x A.One solution...
December 17, 2014 by jake

CHEM !(MOLE) PLZ HELP!
1.How many grams are in one mole silicon? 2. how many moles are in 128 grams of oxygen gas (O2)? 3.How many molecules are in 2 moles of AIO? 4.How many moles are in 18.06 x 10 to the 23 power? 5. how many moles are in 100 grams of CH4?
December 6, 2012 by tyneisha

Chemistry
How do you calculate the pH, pOH, [H3O] and [OH] for a 0.067 M solution of sodium iodate
April 14, 2008 by LT

Chem II
Calculate the pH of the solution made by mixing 35.0 mL of 0.500 M ca(OH)2 with 45.0 mL of 0.710 MHCl
April 16, 2008 by Ken

Chemistry
i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?
February 15, 2009 by Lindsey

Chemistry
Calculate the Ph of an aqueous solution that is 3.00% KOH, by mass, and has a density of 1.0242 g/ml.
August 5, 2009 by Anonymous

metro
Calculate the pH of the buffer solution that results when 10 mL of 0.10 M NaH2PO4 is added to 3 mL of 0.05 M NaOH.
March 17, 2010 by pat

science
Calculate the molarity of 500. mL of solution containing 21.1 g of potassium iodide
October 12, 2010 by kate

chemistry
Calculate the H+ concentration (M) of a 0.010 M solution of NH4Cl. Note that the Kb for NH3 is 1.8 e-5.
November 28, 2010 by cs

Chemistry
Calculate the concentration of the solution in mass percent: 9.95 g C2H6O in 65.1 g H2O.
November 30, 2010 by Kelsey G

chemistry
Calculate the pH of a 0.800 M NaCH3CO2 solution. Ka for acetic acid, CH3CO2H, is
January 16, 2011 by noel

chemistry
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10 -5
March 15, 2011 by haley

chemistry
How do I calculate 50ml of a 50mM sodium momophosphate buffer solution
March 23, 2011 by PAUL

chem 150
calculate the molarity of 700grams of NaOH in 2 liters of solution
June 22, 2011 by nick

gp school
calculate the molarity of a solution when 5g of urea is dissolved in 600ml of water
August 20, 2011 by shiksha

Chemistry
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5
September 23, 2011 by Gift

chemistry
Calculate [H3O ], [ClO4], and [OH] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 C.
October 20, 2011 by Sevy

Chemistry
Calculate the pH of a solution made with 0.240 M H3PO3 and 0.480 M NaH2PO3.
November 8, 2011 by Jessica

chemistry
Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.
November 19, 2011 by alyssa

chemistry
Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
November 27, 2011 by jane

chemistry
calculate the freezing point of a .05500 m aqueous solution of NaNO3
February 12, 2012 by Cece

chemestry
Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.2010−2 M Ca(OH)_2 diluted to 430.0 mL.
February 22, 2012 by chris

chemistry
Calculate pH for strong base solution: 15.0 mL of 1.2010^−2 M Ca(OH)2 diluted to 460.0 mL
February 26, 2012 by jeff

Chemistry
Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
February 28, 2012 by Brooke

Chemistry
Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
March 5, 2012 by Ashley

Chemistry
Calculate the [H+] in a solution containing 1.00 M hydroflouris acid (Ka=7.2 x 10^-4) and .50 M sodium fluoride
April 6, 2012 by Hannah

Chemistry
Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution
April 27, 2012 by Victoria

Science
Calculate the pH of an aqueous solution containing 1.3 * 10^-2 M HCl, 3.0 * 10^-2 M H2SO4, and 2.0 * 10^-2 M HCN.
July 24, 2012 by Will Coppock

Chemistry
Calculate the H+ ion concentration if 0.20M NH3 solution is 2.5% ionized.
September 12, 2012 by charley

analytical chemisty
Calculate the pH and pOH of a 0.00002M solution of acetic acid.
September 23, 2012 by mary

chemisty 2
Calculate the molarity (M) of a solution if you have 0.34 mol of NaOH in 19 ml of water
October 23, 2012 by chris

chemistry
calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution
November 14, 2012 by elissa

Chemistry 1115
How do you calculate the molarities of HC2H3O2 and NaC2H3O2 in a buffer solution?
November 25, 2012 by Marci

Chemistry
Calculate the volume of 0.3MHCL used to neutralise NaOH solution
March 25, 2013 by Chris

Chem
Calculate [H3O ], [ClO4], and [OH] in an aqueous solution that is 0.170 M in HClO4(aq) at 25 C.
March 27, 2013 by Chris

Chemistry 12
Calculate the mass of K2CRO4 needed to make 3.00 L of a 0.0200 M solution.
October 8, 2013 by Riann

chem
mole fraction of CHOHCH in H2O calculate molality of solution
October 23, 2014 by beza

Chemistry
Calculate the pH and concentration of H3O+ of a 0.285M oxalic acid solution.
January 22, 2015 by Kat

AP CHEM
A solution formed by mixing 13.0 mL of 0.013 M Ba(OH)2 with 31.0 mL of 7.0 ✕ 10-3 M NaOH. Calculate [OH-]
February 17, 2015 by Jordyn

science
Calculate the ph of a buffer solution containing 0.2M NH4OH and 0.25M NH4Cl kb=1.810
February 18, 2015 by rupesh

science
Calculate the concentration of all species in a 0.145M solution of H2CO3
March 18, 2015 by Kris

(cont'd) Creating a Budget - HSM 220
Operating Expenses RENT Per Year $125,000 UTILITIES Per Year $100,000 OFFICE SUPPLIES Per Year $25,000 EQUIP/LEASE $50,000 TRANSPTN/TRAVEL $100,000 OUTSIDE CONSULTANTS $100,000 OVERHEAD COSTS $100,000 Peronal Expenses EXEC DIRECTOR Annl Sal $100,000 1-FTEs TRAINING SUPERVSR ...
October 10, 2008 by Lucille

chem
determine the osmotic pressure of the solution at STP. (Assume these solutions behave ideally.) a)0.116 mol fraction glucose (C6H12O6) in water (Assume the density of the solution is 1.02 g/mL.) b)0.0948 mol fraction NaCl in water (Assume the density of the solution is 1.00 g/...
January 26, 2011 by Rukky

Chemistry
1.630 g of iron ore is dissolved in an acidic solution. This solution is titrated to a pink endpoint with 27.15 mL of a 0.020 M KMnO4 solution. a. How many moles of MnO4- ions were consumed? b. How many moles of Fe2+ were in the iron ore sample? c. What is the percent of iron ...
September 8, 2014 by Ray

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.
December 10, 2012 by Gurjot

Chemistry
You have three solutions, A, B, and C, each of which are believed to be one of the following: calcium hydroxide, potassium sulfate, and sodium chloride. Combining B and C results in the formation of a precipitate, but neither solution forms a precipitate with A. Also, adding ...
September 29, 2013 by Matt

Chem
As a part of a study to see whther just the chloride ion on NaCl accelerates the rusting of iron, a student decided to see whtjer iron rusted in a solution on Na2SO4. The solution was made by dissolving 4.550 g of Na2SO4 in water using 125.0 mL volumetric flask to adjust the ...
July 6, 2009 by Lena

Chemistry
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution...
February 11, 2009 by Danielle

Chemistry
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution...
February 11, 2009 by Danielle

Chem
I need help please! You have been given 40ml of a 0.6M solution of NaCl and 40ml of a 0.1M solution of KCl. You are also given as much diluent as you need. Show all your work and indicate how you would make 40ml of a single solution that contains 0.005M NaCl and 0.025M KCl.
May 7, 2012 by Jen

Chemistry
When 50 mL of 1.0 M AgNO3 is added to 50 mL of 0.50 M HCl, a precipitate of AgCl forms. After the reaction is complete, what is the concentration of silver ions in the resulting solution? (a) 0.50 M (b) 1.0 M (c) zero (d) 0.25 M (e) 0.75 M How do I go about solving this? I ...
February 1, 2010 by Anonymous

chemical calculations
A brick of silver with a mass of 31.5 kg measures 0.150 m long, 42.0 cm wide, and 72.00 mm thick. Calculate density of silver in grams per cubic centimeter?
February 2, 2014 by Michael G

chemistry
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
April 1, 2013 by Brooke

chemistry
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
April 2, 2013 by Brooke

Another caffeine from tea question
Can anyone show me the reaction of sodium carbonate with water to produce bicarbonate and hydroxide as sodium carbonate dissolves? And if any, what is the reaction of tannins and caffeine with this solution? Thanks loads!
November 29, 2008 by Scott

chemistry
In a coffee cup calorimeter, 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH are mixed to yield the following reaction: HCl + NaOH  NaCl + H2O. The two solutions were initially at 22.1 oC and the final temperature is 24.2 oC. Calculate the heat that accompanies this ...
March 16, 2015 by Diana

Precalculus...repost.. The tutor didn't quite answ
Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...
May 24, 2014 by Anonymous

Chemistry
The solubility of AgCl (s) is 2.5 x 10^-5 M. calculate the ksp
July 10, 2013 by Mike

Chemistry 2
CALCULATE THE SOLUBILITY OF CuBr in 0.69 M NH3
March 25, 2014 by Joe

MOLARITY QUESTION
I am trying to answer a bunch of lab questions about a lab I did and am stuck on finding the morality of the diluted vinegar solution? Can anyone help me? (I hope I gave enough info) Here where the lab procedures that I already went through: Transfer 10mls (Vc)of vinegar to a ...
June 12, 2009 by Gweedo8

chemistry
calculate grams of potassium bromide dissolved in 50 grams of water at 0 celcius
May 18, 2012 by Anonymous

science
calculate how many grams of chloride ions are present in 50 grams of ocean salts
April 17, 2013 by T-perry

Help now please, Chemistry
How many grams of oxygen can be produced by heating 10.0g of mercury (II) oxide? Sulfuric acid is added to 8.10g of magnesium, how many grams of hydrogen are set free? I'll do the first. You do the second by following the first as a guide. 1. Write the balanced equation. 2HgO...
March 5, 2007 by Beautiful

Chemistry
A 2.28 m solution of the solute formic acid dissolved in the solvent H2O is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 12.40 mol of formic acid. Correct Answer = 6.01 Molar Mass (g/mol): HCO2H 46.03 H2O 18.015 Density ( g/mL ): HCO2H 1....
June 6, 2010 by Fred

analytical chemistry
DrBob222, it is me again. Continue the question 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL, 0.5mL, 1mL, 1.5mL, 2mL, ...
May 10, 2015 by katy

algebra
To solve the inequality -1/2 k is greater then or equal to -5, Danny multiplied both sides by the reciprocal of -1/2 . His solution was k is greater then or equal to 10.What mistake did he make? Danny checked his solution, but his check did not let him know that he had made an...
December 9, 2010 by lala

chemistry
A 0.094 g of CuSO4*5H20is dissolved and diluted to the mark in a 500.0-mL volumetric flask. A 2.00-mL sample of this solution is transferred to a second 500.0-mL volumetric flask and diluted. What is the molarity of CuSO4 in the final solution? To prepare the solution directly...
August 29, 2011 by Anonymous

College Chemistry Lab
The absorbance of a 6.3x10^-5M solution of an iron complex was measured to be 0.328 at the optimum wavelength. A second solution of the iron complex has an absorbance of 0.833 measured under identical conditions. What is the molarity of the complex in the SECOND SOLUTION?
March 15, 2010 by L**

Chemistry
Which of the following results from the presence of a solute in a given solvent? A. The vapor pressure of the solution is lower than that of the pure solvent. B. The boiling point of the solution is lower than that of the pure solvent. C. The freezing point of the solution is ...
May 22, 2014 by Alexa

maths
which of the following statements is incorrect? 1 microlitre=10^-6 litres 1 megagram=10^6 grams 1 millimetre=10^3 metres 1 kilogram=10^3 grams 100 centimetres=1 metre thanks andy
May 11, 2010 by Andy

chemistry
a sample of a radioisotope had a mass of 100.0 grams. After exactly 24 days, 6.25 grams remained. The half life of the isotope is _________
June 3, 2011 by rick

CHEM
Calculate the molar solubility of gold(I) chloride (Ksp= 2.0 x 10^-13) in .10 M NaCN. The complex ion formed is [Au(CN)2]- with Kf= 2.0 x 10^38. Ignore any other competing equilibrium systems. I'm having trouble writing an equation to start off with. First, I had written AuCl...
April 15, 2007 by Kristina

Chemistry(Please respond)
I did an experiment to study the effects of changes in conditions on an equilibrium system. The first system was the dissociation of acetic acid. HC2H3O2 -> H^+^ + C2H3O2^-^ <- We had to add 2mL of acetic acid into a test tube and we had to test the pH of the solution ...
March 14, 2012 by Hannah

Chemistry
Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide 1. before addition of any base 2. after addition of 30.0mL of base 3. after addition of 100.0mL of base 4. after ...
April 25, 2011 by Michael

chemistry
The boiling point of diethyl ether, CH3CH2OCH2CH3, is 34.500 C at 1 atmosphere. Kb(diethyl ether) = 2.02 C/m In a laboratory experiment, students synthesized a new compound and found that when 13.85 grams of the compound were dissolved in 283.2 grams of diethyl ether, the ...
May 14, 2015 by JC

Maths
Hi I am really sorry I now people have already attempted to help me with this one already, however I am still not able to understand, I really have not done a lot of these equations and am struggling. I have put a little more information down this time, any help is much ...
February 17, 2011 by Claire

math,help!!!!!
Let A be a 2*3 coefficient matrix ;A a)If the system Ax=b is consistent is the solution unique? why or why not? explain b) how many pivots must A have to gurantee that Ax=b has a solution for every vector b in IR^2? c) can the columns be linearly independent? 4 5-1=4
February 11, 2007 by jasmine20

chemistry
When an aqueous solution is cooled to low temperatures, part of the water freezes as pure ice. What happens to the freezing point of the remaining solution when this occurs? Explain.
January 31, 2009 by Anonymous

chemistry
This is confusing. I am supposed to explain how to prepare a solution using the proper lab equipment (both from dry solid and a stock solution) Help would greatly be appreciated...
February 21, 2009 by Anon

chemistry
sorry i forgot some of the units in the initial posting 8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, , in this solution?
November 2, 2009 by katy

CHEM 102
A solution of volume 0.500 L contains 1.70g NH3 and 4.15g (NH4)2SO4. What is the pH of this solution? Answer obtained was 9.76, however it states that it is slightly off...
October 21, 2011 by Calvin

chemistry
What volume (in liters) of 0.96 M KOH solution should be added to a 0.090 L solution containing 9.9 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 10.20?
May 3, 2013 by shanonn

chemistry
What volume (in liters) of 0.94 M KOH solution should be added to a 0.090 L solution containing 9.1 g of glutamic acid hydrochloride (Glu, FW=183.59; pka1=2.23, pka2=4.42, pka3=9.95) to get to pH 10.20?
May 23, 2013 by Decisice 2

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