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December 6, 2016

Search: calcium carbonate

Number of results: 2,070

Chemistry
An antacid tablet containing magnesium hydroxide instead of calcium carbonate was dissolved in 100.0 mL of 0.2893 M HCL. 10 mL of this solutions was titrated to endpoint with 25.20 mL of 0.1007 M NaOH. How much magnesium hydroxide was in the antacid tablet(in mg)? Any help is ...
May 7, 2013 by Mindy

College Chemistry
calculate the moles of sulfuric acid that remained in the solution after reaction with the carbonate. the tared mass of carbonate is 1.5179g
September 28, 2012 by Anonymous

chem
Calcium chloride is 36.0% calcium by mass. A 5.00g sample of calcium chloride contains what mass of chlorine?
May 25, 2012 by tenisha

Chemistry
Insoluble silver carbonate, Ag2CO3(s), forms in the following balanced chemical reaction: 2AgNO3(aq) + K2CO3(aq) = Ag2CO3(s) + 2KNO3(aq). What mass of silver nitrate, 2AgNO3(aq), reacts with 25.0 g of potassium carbonate,K2CO3(aq),if there is at least 5.5 g of silver nitrate ...
May 12, 2016 by Gale

Chemistry
Calcium carbonate, CaCO3(s), decomposes upon heating to give CaO(s) and CO2(g). A sample of CaCO3 is decomposed, and carbon dioxide is collected in a 250 mL flask. After decomposition is complete, the gas has a pressure of 1.3 atm at a temperature of 31℃. How many ...
May 5, 2011 by Veronica

Chemistry
A 0.41 g sample of limestone was dissolved in HCl and all the calcium in the limestone was converted to Ca2+(aq). The solution was treated with excess ammonium oxalate, (NH4)2C2O4(aq), and it was found that 3.0 g of calcium oxalate, CaC2O4(s) was precipitated. Calculate the ...
September 20, 2012 by Bob

chemistry
Calcium oxide and carbon are reacted to produce carbon monoxide and calcium carbide CaC2. When one mole of calcium carbide is formed, 464.8kJ is absorbed. How many grams of carbon are used up when 20.00kJ of heat is absorbed?
June 22, 2013 by Jill

Chemistry
Calcium nitrate and ammoonium fluoride react to form calcium fluoride, dinitrogenmonoxide and water vapor. What mass of each substance is present after 28.42 g of calcium nitrate and 29.60 g of ammonium fluoride react completely?
October 26, 2009 by Brittany

math
roated beef has 20g of protein and 11g of calcium per serving. serving of mashed potatoes has 2g of protein and 25g of calcium, how many servings of each are needed to supply 29 grams of protein and 61 grams of calcium?
October 1, 2012 by deepa

Chemistry
I have no idea where to even start with this. It seems like it should be simple, but I have no clue. The question is... "In serum, about 55% of total serum calcium is bound. The measurement of ionized (free) calcium with an ISE is 1.10 mM. What is an estimate of the total ...
April 9, 2013 by Maranda

AP Chem
Whew. long question. Barium carbonate is the source of barium compounds. It is produced in an aqueous precipitation reaction from barium sulfide and sodium carbonate. (Barium sulfide is a soluble compound obtained by heating the mineral barite, which is barium sulfate, with ...
October 28, 2008 by Anna-Marie

Chemistry
Calcium carbonate reacts w/stomach acid according to the following chemical equation. CaCO3+2HCl(aq)-> CaCl2(aq)+H2O(l)+CO2(g) A. Balance the eqaution B. Tums is one commercially sold antacid that contains CACO3. If Tums is added to 20.0ml of 0.400 M HCl, how many grams of ...
December 14, 2010 by Tony

HOFBrINCl
can someone help me on these 2 questions so i can get an idea to do the rest of mine. im given hydrochloric acid and a marble chip (calcium carbonate i think), so what would be the reactants, the word equation, the balanced equation, prediction of type of reaction for this? ...
March 15, 2016 by Chemistry

science
if i had mixture of sodium carbonate and sand, and spilled some sodium carbonate (no sand spilled) after weighing the mixture, would the spill affect the percentage of sand or sodium carbonate when we calculate it?
February 17, 2011 by chriss

chemistry
A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?
April 3, 2013 by mulaudzi

science
A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?
April 3, 2013 by mulaudzi

Chemistry
Calcium oxide (quicklime) reacts with water to produce calcium hydroxide (slaked lime). CaO(s) + H2O(l) Ca(OH)2(s) ÄH = -65.2 kJ The heat released by this reaction is sufficient to ignite paper. How much heat is released when 29.0 g of calcium oxide reacts?
October 18, 2008 by Glenna

Chemistry
Imagine that you are a charge nurse in a nursing home. You are typically the only medical personnel in the house at any one time. A patient who is known to have excess stomach acid asks you to give him an antacid tablet. The typical antacid is either calcium carbonate or ...
September 19, 2014 by Mickey

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

Gen Chemistry
52.8 mL of a calcium chloride solution with unknown concentration was treated with phosphoric acid to remove all of the calcium ions in the form of a precipitate. The precipitate was filtered, dried and was found to have the mass of 3.9565 g. What was the concentration of the ...
December 11, 2010 by Kevin

Chemistry
use the table below to calculate ΔHo reaction: Standard Enthalpies of Formation, ΔH˚fٍ at 298 K Substance - Formula - ΔH˚ƒ(kj/mol) Acetylene C2H2(g) 226.7 Ammonia NH3(g) -46.19 Benzene C6H6(l) 49.04 Calcium Carbonate CaCO2(s) -1027.1 Calcium ...
February 8, 2008 by Sam

Chemistry
Quick question here: Which has the higher reactivity, Calcium or Potassium? Is it calcium?
December 1, 2008 by Anonymous

Chemistry-please help
Can calcium react with chlorine gas to give calcium chloride?
March 19, 2009 by Anne

chemistry
how much calcium is htere in 2.30 L of 0.0450 M calcium hydroxide solution ? pdf
February 6, 2012 by ashishs

Introduction to Physics
What is the electric charge on the calcium ion in calcium chloride, CaCl2?
September 1, 2013 by Eunice

chemistry
Calcium metal is heated with oxygen gas to yield calcium oxide.
October 14, 2014 by Anonymous

Chemistry
How much calcium hydroxide is produced from 72.0g of calcium combinig with water?
November 12, 2011 by Camilla

chemistry
how much calcium is there in 2.30 L of 0.0450 M calcium hydroxide solution ? pdf
February 6, 2012 by ashishs

Chemistry
Why does the element calcium react with water differently than magnesium, potassium and sodium, in a way that calcium looks opaque and cloudy in water and when phenlotphtahein is added it looks bright pink but how come the other elements don't look like that in water? what ...
October 8, 2016 by Zyra

chemistry
Calculate the solubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP
April 3, 2008 by Lawrence94

chemistry
Calculate the solubility of calcium sulfate 0.010 mol/L calcium nitrate at SATP
April 7, 2008 by Ross

chemistry
How many grams of calcium oxide, CaO, can be produced from 4.20 g of calcium metal and 1.60 g of oxygen gas?
September 21, 2008 by Erika

ebusakami girls
number of calcium ions present in 1 mole of calcium chloride solution
December 16, 2015 by jenipher ahono

Science
18 g of hydrochloric acid reacts with 15 g of calcium hydroxide produce calcium chloride and water.
April 26, 2016 by Jaime

chemistry
i am having trouble answering this question. Help please! The balanced chemical equilibrium equation to show the formation of the calcium carbonate solid in limestone caves is CO2(g) + H2O(l) + CaCO3(s)  Ca2+(aq) + 2HCO3(aq) Use Le Chateliers principle to predict what ...
February 27, 2010 by Evan

Chemistry
Hello, we recently did a lab in our chemistry class to analyze an Unknown amount Calcium Carbonate which was titrated with EDTA. Our titration results were: mass of the unknown CaCO3 was 0.172 g and the mL of EDTA added was 30.7. How do I find the percent mass of Ca?
July 1, 2010 by Anna

Gr 10 Chemistry
What is the balanced skeleton equation of Calcium hydroxide+ Phosphoric acid --> Calcium phosphate+ Water
November 9, 2008 by Pie

chem
Solid calcium hydroxide, Ca(OH)2, is dissolved in water until the pH of the solution is 10.23. What is the concentration of calcium ion [Ca 2+ ]?
February 25, 2013 by ston

Chemistry
Washing soda is added to hard water to allow soap to lather. A certain brand of washing soda contains partially hydrated sodium carbonate solid. A 0.300 g sample completely reacts with 20.0 mL of 0.250 M hydrochloric acid. a What mass of sodium carbonate was present? b ...
February 19, 2008 by Lauren

chemistry
If 10.0 g of CaCO3(s) is heated, 5.61 grams of solid CaO will remain (4.39 g CO2 gas is driven off) If 3.25 g of NaCl(s), which does not undergo decomposition, is mixed with 5.30 g of CaCO3(s) and the mixture is heated long enough to decompose all of the calcium carbonate, how...
September 9, 2010 by Keenan Flemming

chemistry 11
Food manufacturers sometimes add calcium acetate to puddings and sweet sauces as a thickening agent. What volume of 0.500 mol/L calcium acetate, Ca(CH3COO)2 (aq), contains 0.300 mol of acetate ions? So I've been over this a hundred times and I still can't get past the part ...
December 17, 2014 by julie

Chemistry
A sample of calcium carbonate that has a mass of 1.0 g is heated and completely decomposed-calculate. a) the mass of carbon dioxide produced b)the volume of carbon dioxide at SLC c)the volume of carbon dioxide at STP
May 2, 2013 by Ally

chemistry
carbon dioxide (CO2) gas is produced as a result of the reaction between calcium carbonate and hydrochloric acid. The gas that is produced is collected in a 20 dm3 container. The pressure of the gas is 105 kPa at a temperature of 20 C. What mass of carbon dioxide was produced?
April 14, 2015 by carmen

12 chemistry
What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?
April 24, 2007 by Erica

Chemistry
How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?
April 15, 2012 by momo

chem
If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes the carbonate ion to carbon dioxide.) Do I ...
April 3, 2011 by Beth

Chemisty
The compound potassium carbonate is a strong electrolyte. Write the reaction when potassium carbonate is put into water
January 22, 2012 by ben

Science
How many grams of barium carbonate can be produced from mixing 100.0 mL of 0.20M barium nitrate and 50.0 mL of 0.30M potassium carbonate?
March 14, 2012 by Mallory

Chemistry
How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?
September 22, 2014 by Sam

chemistry
A carbonate ion, CO32−, can participate in an acid-base reaction. How should the carbonate ion be classified?
October 13, 2014 by Morgan

chemistry
A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride – a chemical used to control highway dust, strengthen concrete mixes, and add flavor to foods – is produced by the reaction. 2 HCl + Ca(OH)2 →...
March 1, 2010 by BT

Read Y9 chemistry and go upwards
3. Copper carbonate turns black when it is heated and the mass decreases. What is the normal colour of copper carbonate?
September 10, 2008 by Moira

8th grade physical science
what is the charge on carbonate ion? Compared to the number of protons, how many electrons does the carbonate ion have?
November 17, 2008 by Taylor

chemistry
balance this chemical equation: aqueous solutions of alumininum chloride and sodium carbonate are combined, producing alumininum carbonate
March 29, 2010 by Elizabeth

chemistry
how many grams of silver carbonate will precipitate when excess ammonium carbonate soln is added to 41.0 mL of a .518 M silver nitrate solution?
March 12, 2016 by JJ

Chemistry
The concentration of Pb+2 in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluable lead(II)carbonate (267.2092 g/mol) according to the balanced equation ...
February 22, 2012 by Cynthia

chemistry
Determine the maximum mass of calcium iodate that can be dissolved in a 10.0L jug of 3.25x10^-2 molar calcium sulphide solution.
January 29, 2013 by Kayleigh

chemistry quick help!
In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium sulfate can be produced if you start the reaction with 4.19 grams of calcium chloride and the reaction goes to completion?
January 25, 2013 by thad

Chem hwk
In the balanced double replacement reaction of calcium chloride CaCl2 and aluminum sulfate Al2(SO4)3, how many grams of calcium sulfate can be produced if you start the reaction with 18.97 grams of calcium chloride and the reaction goes to completion?
January 28, 2013 by Thad

chemistry
The solubility of nickel (II) carbonate at 25 degrees celsius is 0.042 g/L. Calculate Ksp for nickel (II) carbonate. thanks
December 11, 2010 by amy

Chemistry
4.00 g dm^-3 of impure sodium carbonate is used in a titration. What could have caused the impurity in the sodium carbonate?
October 26, 2011 by ?

Chemistry
Bones are mostly calcium phosphate. Calcium chloride reacts with potassium phosphate to form calcium phosphate and potassium chloride. Indicate the physical states or reactants and products a) Write the balanced equation of the information above b) Determine the total ionic ...
September 26, 2014 by mandi

Stoichometry
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 0.55 mole of sodium carbonate is mixed with one containing 0.55 mole of silver nitrate. After the reaction is complete, the solutions ...
December 19, 2012 by Nicola

chem
how do i write a balanced equation for the reaction for Calcium Carbide, CaC2, acetylene gas, C2H2, and calcium hydroxide, Ca(OH)2 are produced
April 13, 2010 by jaime

Chemistry
Assume that the normal blood buffer contains 0.00080 M carbonic acid and 0.0085 M hydrogen carbonate, the pKa = 6.35 for carbonic acid and the volume of blood in the body is 7.00 L. The blood pH, due to disruption is now 7.20. What is the ratio of [HCO3−]/[H2CO3] now ...
November 11, 2013 by Natalie

chem
When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42 degrees celsius and 770 ...
January 12, 2015 by julie

science(chemistry)
why sodium carbonate against hydrochloric acid titration using phenolphthalein indicator does not go to completion but stops at the sodium hydrogen carbonate stage.
November 21, 2011 by yussif

chemistry
how many moles of potassium carbonate will be produced if 400.0 g of potassium hydrogen carbonate are heated
October 6, 2009 by Tierney

chemistry
The molar mass of magnesium carbonate, MgCO3, is 84 g/mole. How many moles are in 12.60 g of magnesium carbonate?
December 5, 2009 by brianna

chemistry
The solubility of nickel (II) carbonate at 25 degrees C is 0.047 g/L. Calculate Ksp for nickel (II) carbonate.
December 13, 2010 by joe

Science
what mass of sodium carbonate is present in a 3000cc of a 1.2 solution? The density of the sodium carbonate is 1.5 g/ml.
September 20, 2011 by Shelly Perez

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
October 21, 2013 by Anonymous

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
October 21, 2013 by Anonymous

CHEMISTRY
The concentration of Pb2+ in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (II) carbonate (267.2092 g/mol) according to the balanced equation ...
October 21, 2013 by Anonymous

Chemistry
10. Use the accepted Ksp value of Calcium hydroxide to calculate the following: a. What is the most calcium hydroxide that can be dissolved in 1.0 Liters of de-ionized water? b. What is the most calcium hydroxide that can be dissolved in 125.0 ml of de-ionized water? c. What ...
September 20, 2016 by John

chemistry
how much calcium oxide is recovered when 250 g calcium hydroxide are heated given the following reaction? Ca(OH)2 arrow CaO + H2O
April 11, 2011 by cam

chemistry
If 16.9 g sodium carbonate is obtained from the thermal decomposition of 75.0 g of sodium hydrogen carbonate according to the unbalanced equation, NaHCO3 ¨ Na2CO3 + H2O + CO2 What is the percent yield?
September 18, 2011 by kaci

Chemistry
One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to deposite 1.00x10^2 mg of CaCO3
April 24, 2011 by Trista Nigh

chemistry
Calcium carbonate CaCO3 reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)->CaCl2(aq)+H2O(l)+CO2(g) Tums, an antacid, contains CaCO3. If Tums is added to 35.0 mL of 0.300 M HCl,how many grams of CO2 gas are produced?
October 8, 2010 by Dana

Chemistry
Calcium carbide, CaC2, can be produced in an electric furnace by strongly heating calcium oxide (lime) with carbon. The unbalanced equation is CaO(s) + C(s) ¨ CaC2(s) + CO(g) Calcium carbide is useful because it reacts readily with water to form the flammable gas acetylene...
February 5, 2011 by Mariana

Chemistry
How many grams of calcium carbonate, CaCO3, do you need in an antacid tablet to neutralize 20 mL of stomach acid? (stomach acid is 0.1 M HCl. There are 3.65g of HCl in 1L of stomach acid or 1g of HCl in 274g of stomach acid).
November 13, 2012 by Marie

more chemistry help and proofread
write the formulas for the following potassium sulfide i put KaS Tin (IV) chloride i put SnCl4 Dihydrogen sulfide i put H2S Calcium Oxide i put CaO Hydrobromic acid i put HBr Aluminum Fluoride i put AlF3 dinotrogen pentoxide i put N2O5 Iron (III) carbonate i put Fe2(CO3)3
March 8, 2008 by John

chemistry
20cm3 of saturated aqueous solution of hydrogen carbonate (iv) at 25^oc requires 10cm3 of 2.0moldm-3 hydrochloric acid for complete reaction.what is the solubility of sodium hydrogen carbonate(iv) in moldm-3 at 25^oc
March 7, 2013 by nanayeboahford

calcium cloride
we are having a ice cream industry we are using calcium cloride to get -35 degree now we are getting -25 degree density of liquid is 1.210 how many kilo grams of calcium cloride to mix in liquid to get the density of 1.300 the liquid is nearly 3000 liters
April 3, 2011 by chitti

chemistry
1. How many grams of calcium chloride (CaCl2) are there in 600.0 mL of an aqueous solution that has a concentration of 0.450 M CaCl2? 2. The conjugate base of HS- is: 3. What mass of calcium chloride, CaCl2, is needed to prepare 3.65 L of a 1.75 M solution? The molar mass of ...
November 12, 2015 by angel

Chemistry
The acid-base reaction between phosphoric acid, H3PO4, and calcium hydroxide, Ca(OH)2, yields water and calcium phosphate. For each mole of calcium phosphate produced by this reaction, how many moles of water are also produced?
September 19, 2009 by Anonymous

AP Chemistry
Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used? 1. Barium carbonate is too expensive. 2. Barium carbonate is soluble in plain wa- ter. 3...
September 17, 2010 by Nick

chemistry
Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used? 1. Stomachs contain HCl and all carbonates dissolve in acid.2. Barium carbonate is too ...
September 19, 2012 by cheri

Chemistry
Our class did an expeiment of adding sodium carbonate and calcium chloride. The experiment only yielded 28% of the calculated yield. The class did the experiment as a group (there are only 4 students in our class) and the experiment was closely supervised by our teacher to ...
October 26, 2011 by Robert

AP Chemistry
A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. ...
September 13, 2011 by Tina

AP chemistry
A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.3018 g. Assuming...
September 5, 2012 by valerie

AP Chemistry
A 28.4858 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s)→MgO(s) + CO2(g).After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.3014 g. Assuming ...
August 30, 2013 by Gabriella

Chemistry
A 28.4378 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.6846 g. ...
September 10, 2013 by Zawng

chemistry
A 21.8603 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 18.7358 g. ...
September 9, 2014 by Anonymous

Chemistry
How many moles of lithium carbonate are contained in 400 mL of a lithium carbonate solution with a concentration of 0.015 mol L-1? Give your answer as two sig. figures, followed by a space and the units
June 13, 2012 by Kareena Kapoor

AP Chemistry i need help!
A 21.5997 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.5207 g. ...
September 4, 2012 by Rafael

chem
when water is added to solid calcium carbide, CaC2, acetylene gas, C2H2, and calcium hydroxide, Ca(OH)2 are produced. how do i write a balanced equation for the reaction.
April 14, 2010 by herjaz

chemistry
when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how do i write a balanced equation for the reaction.
April 19, 2010 by 6784

chemistry
How many grams of solid sodium sulfate can be added to 1000L of a 0.02mol/L solution of calcium chloride before a precipitate forms? (Ksp for calcium is 6.1x10^-5)
July 27, 2010 by Kat

cHEMISTY
If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate
March 30, 2013 by john

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