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April 30, 2016

Search: Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium is established: HC2H3O2

Number of results: 68,633

Chemistry
Consider the following thermochemical equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover: C3C6O + 4 O2 --> 3 CO2 + 3H2O DELTA Hrxm= -1790kJ If a bottle of nail polish remover contains 183 mL of acetone, how much heat would be released...
March 19, 2012 by Ashley

Science 207
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 2 3 4 5 6 7 8 POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent to ...
June 14, 2015 by Lisa

Science 207
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 2 3 4 5 6 7 8 POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent to ...
June 15, 2015 by Lisa

Chemistry
Consider the following reaction. 2A(aq) (Two way arrows) B(aq) Kp = 5.48*10^-5 at 500K If a sample of A at 3.10atm is heated to 500K, what is the pressure of B at equilibrium? I know I need to do the ICE table, but am having trouble solving for x once I plug everything in. "A...
February 9, 2016 by Ashtyn

Physics
An object of mass m=80 kg moves in one dimension subject to the potential energy U(x)=λ/4*(x2−a2)2+(b/2*x2) a) How many equilibrium points (stable and unstable ones) does this potential have? b) Find a stable equilibrium point x0 such that x0 is positive. (in meters...
November 2, 2013 by Phy

chemistry
Consider the following chemical equilibrium: SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J a. Predict weather the forward or reverse reaction will occur when the equilibrium is disturbed by: i. adding oxygen gas ii. compressing the system at constant temperature iii. ...
March 6, 2008 by linda

Chemistry
1. Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may represent C9H7NH+ ...
November 30, 2014 by Mcmaster university

chemistry
The urine excreted by an adult patient over 24 hours was collected and diluted to give 2.000L sample. at ph 10 EDTA FORMS 1:1 COMPLEX WITH BOTH Mg2+ and Ca2+ and after buffering at this pH a 10mL aliquot of the sample required 26.81mL of 0.003474M EDTA for titration The ...
March 12, 2012 by jenny

Chemistry
A student ran the following reaction in the laboratory at 327 K: CH4(g) + CCl4(g) 2 CH2Cl2(g) When she introduced 4.07E-2 moles of CH4(g) and 7.57E-2 moles of CCl4(g) into a 1.00 Liter container, she found the equilibrium concentration of CH2Cl2(g) to be 1.21E-2 M. Calculate ...
November 19, 2013 by Jessica

chemistry
Construct a galvanic (voltaic) cell from the half reactions shown below. Au3+ + 3 e- → Au (s) ξo= 1.420 V Br2 (l) + 2 e-→ 2 Br- (aq) ξo= 1.087 V Calculate the equilibrium constant (K) for this cell. Assume that the temperature is 298K. First, consider ...
May 2, 2014 by bekah

chemistry
how many mL of 1M HC2H3O2 are required to neutralize a spill of 25mL of 6M NaOH?
December 7, 2010 by erin

college chemistry
What is the ratio of KC2H3O2 and HC2H3O2 in a buffer with a pH of 5.25? Ka = 1.8 x10-5?
November 16, 2011 by Teresa

Chem
How do I Balance the equation. HC2H3O2(aq)+Ca(OH)2(aq)→H2O(l)+Ca(C2H3O2)2(aq)
August 16, 2013 by Paul

chem
The decomposition of ammonium hydrogen sulfide that is shown below is an endothermic process. NH4HS(s) reverse reaction arrow NH3(g) + H2S(g) A 6.1589 g sample of the solid is placed in an evacuated 4.000 L vessel at exactly 24°C. After equilibrium has been established, the ...
February 10, 2010 by Anonymous

Chemistry
Consider the isomerization equlibria of an alkene (C4H8) that co-exists as three isomers. (These 3 are in an equlibrium triangle) Reaction 1: cis-2-butene ⇔ trans-2-butene Reaction 2: cis-2-butene ⇔ 2-methylpropene Reaction 3: trans-2-butene ⇔ 2-methylpropene...
March 3, 2013 by Gleb

Chemistry
I'm doing online chemistry homework, and the site keeps telling me I have the wrong answer, but I'm not sure what I'm doing wrong. please help? What is the pH of a 0.089M solution of phosphorous acid (H2PHO3) in water? The value of Ka1 for H2PHO3 is 1.600 E-2 and the value of ...
January 22, 2012 by Summer

BioChem
I have a hard time with this question. Please help. One way to determine the concentration of protein in a solution is to perform a "protein assay". There are several assay kits on the market that one can use, but they all rely on the common paradigm that the aromatic amino ...
June 17, 2006 by Jamshid

Science (check please)
3. Which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during colds months? . . . My answer: Circadian rhythm and hibernation.
March 28, 2014 by luna

chemistry
A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is: Zn(s) + 2HCl(aq) ---> H2(g) + ZnCl2(aq) A piece of zinc is dropped into 1.00 L of 0.100 M HCl and the following data were obtained: Time/Mass of Zinc 0 s/0....
April 17, 2010 by Juggy

chem
Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money? Write a balanced chemical equation along with your answer. a) Rolaids (550 mg CaCO3 and 110 mg Mg(OH) per tablet) - 150 tablets for $9.44 b) ...
October 25, 2015 by John

chem - help!
Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money? Write a balanced chemical equation along with your answer. a) Rolaids (550 mg CaCO3 and 110 mg Mg(OH) per tablet) - 150 tablets for $9.44 b) ...
October 26, 2015 by John

math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment 70 ML of the 50% solution and 35 ML of the 80% solution 35 ML of the 50% ...
December 24, 2013 by chandler

Algebra 1
A science teacher has supply of 50% methane solution and a supply of 80% methane solution.How much of each solution should the teacher mix together to get 105 mL of 60% methane solution for an experiment. a. 70 mL of the 50% solution and 35 mL of the 80% solution b. 35 mL of ...
January 5, 2016 by sierra.(@ MS.SUE PLEASE HELP)

Math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment a. 70 ML of the 50% solution and 35 ML of the 80% solution*** b. 35 ML of ...
January 19, 2016 by Kaai97

Chemistry
Determine the volume, in milliliters, required to prepare each of the following diluted solutions. 40.0mL of a 2.75M KNO3 solution using a 1.00M KNO3 solution 45.0mL of a 2.90M H2SO4 solution using a 6.00M H2SO4 solution 0.700L of a 2.10M NH4Cl solution using a 5.00M NH4Cl ...
April 7, 2015 by Chan

Chemistry
here is the question. it is a fact that when you add acetone to saturated sodium chloride, the equilibrum shifts towards the right. what observation supports this fact? what is the role of acetone in shifting the equilibrium towards the right side? What reaction conditions ...
March 21, 2010 by Dalala

inorganic chemistry
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effet
September 11, 2010 by moon

in organic chemistry
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effet
September 11, 2010 by moon

please chem help
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect
September 16, 2010 by moon

please chem help
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect
September 16, 2010 by moon

please chem help
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect
September 16, 2010 by moon

please chem help
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect
September 16, 2010 by moon

AP Chemistry
A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6X 10-5.
December 4, 2011 by Bill

chemistry
A solution is prepared by mixing 50.7 mL of 0.28 M Pb(NO3)2 with 70.8 mL of 1.0 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6 10-5.
February 21, 2013 by jeff

Chemistry
Consider the following equilibrium reaction: NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g) When 100 g of sodium hydrogen carbonate are added to a reaction vessel, the temperature is increased to 200°C, and the system comes to equilibrium. What happens to the partial pressure of carbon...
February 27, 2012 by Tanner

analytical chemisty
Consider the standardization of a solution of K2Cr2O7 with iron metal according to the following: Reaction: Fe + Cr2O7-2 → Fe +3 + Cr+3a. How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution? What is the exact normality of the solution prepared ...
February 2, 2013 by Anonymous

Organic Chemistry
How do I draw the condensed formula for: 1. 2-methyl-2-pentene 2. 5-methyl-1-hexene 3. 2,2,4,5-tetramethylhexane 4. propanoic acid 5. 2-pentyne
September 30, 2007 by Cinnamon

12th grade
Write the chemical equation for Sulfiric Acid and potassisum sulfate the product is potassium sulfate and water.
February 16, 2009 by Liz

biology
Organic compounds-a)carbohydrates b)lipids c)proteins d)nucleic acid (Explain what each organic compound is and why it is important to the cell)
January 13, 2010 by kim

CHEMISTRY
how many grams of copper (II) Chloride are formed in the double replascement reaction of 1.1 g copper (II) oxide and excess hydrochloric acid?
July 11, 2010 by maleia

acid and base titrations
in a titration, 0.0400 mol of solid NaOH is required to neutralize 10.0 mL of H2SO4(aq). From these data, the [H2SO4] is:
November 19, 2010 by jj reddick

chemistry
What is the concentration of HCl in a 250.0 mL sample of hydrochloric acid if 15.5 mL of 0.0100 M NaOH is needed to react with all the HCl?
February 22, 2011 by Maddy

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of phosphoric acid and magnesium carbonate.
March 23, 2011 by Bruce

Chemistry
Give the molecular, complete ionic, and net ionic equations for the reaction of sulfuric acid and barium hydroxide.
March 23, 2011 by Bruce

chemistry
The conjugate acid of CNO- is a. HCNO b. CNO- c. CN- d. H2CNO e. HCN Not quite sure for this question, is A the answer? Need help, thanks.
May 26, 2011 by Cheryl

Chemistry
How do we know that the moles of ascorbic acid originally present in the juice is equal to the moles of I2 that we added when the color change occurred?
October 3, 2011 by Anonymous

college Chemistry
molarity of hydrochloric acid=0.5 M-cost of tums package 150 tablets is 9.99 what is the cost of a single tablet
October 25, 2011 by Nadine Anthony

chemistry
What mass of hydrogen peroxide should result when 1.50g of barium peroxide is reacted with 25.0mL of 0.50 M hydrochloric acid?
December 13, 2011 by confused

Chemistry Help Please
i do not understand how to solve this problem, please help 10.0mL 0.5M sulfuric acid can neutralize what volume of 0.5M ammonium hydroxide?
March 31, 2012 by Robert

chem
Aspartame, an amide, is the sweetener commonly used in diet cola.What is the carboxylic acid that is a reactant in the production of aspartame.
April 26, 2012 by al

chemistry
How would you separate a mixture of equal amount of dibenalacetone a neutral compound and benzoic acid an acidic compound?
October 1, 2012 by Julius muson

chemiswtry
in a lab there is a spill of 47.5ml of .500 mol/l NaOH how many grams of Sulfuric acid is needed to neutralizethe spill
October 18, 2012 by kim

chemistry
What will be the total mass of a 73.3 gram flask and its contents if it contains 20.1 mL of concentrated sulfuric acid with density 1.84 gram per mL?
October 28, 2012 by Jas

chemistry please help!!
what is the net ionic equation for the reaction between a strong acid and a strong base? what does it mean by this question?/ (: thanks.
March 4, 2013 by yvette

chemistry
why we use phenolphthalein indicator in the determination of the strenght of NAOH by using standard oxalic acid why not the others indicator?
June 25, 2013 by sbr

chemistry
how to calculate the ph level of 2.5g NaOH, 2g H2SO4 and 1.5g ethenoic acid in water? Each compound being put in a liter of water.
August 17, 2013 by livingstone

Chemistry
Draw condensed structural formula for... 2,3-dichloropropanoic acid I know it is hard to DRAW online, but still you can do something like this... CH-...
January 12, 2014 by Anonymous

Biology
What is a subunit? How can I determine where Docosahexaenoic Acid has a subunit?
October 30, 2007 by Chris

acids and alkali
Is baking powder an acid or an alkali?
November 17, 2007 by MO

Chemistry
is fumaric acid polar or non-polar?
January 26, 2011 by Nina

chemistry
is flourosulfonic acid a polar or non polar?
October 12, 2011 by Andile

chemistry
is flourosulfonic acid a polar or non polar?
October 12, 2011 by Andile

chemistry
reaction of benzoic acid with propylamine. if there no reaction why
April 20, 2013 by felice

Economics
1.Which of the following is consistent with the law of supply? a.As the price of calculators rises, the supply of calculators increases, ceteris paribus. b.As the price of calculators falls, the supply of calculators increases, ceteris paribus. c.As the price of calculators ...
July 4, 2009 by Trying

Microbiology
A patient with an active case of Mycobacterium tuberculosis (TB) was treated and released from the hospital. You are responsible to oversee the decontamination of the patient’s room. Explain why is it a concern if the beside roll-away table has dried-up sputum on it from a ...
September 26, 2014 by Rose

chemistry
The urine excreted by an adult patient over 24 hours was collected and diluted to give 2.000L sample. at ph 10 EDTA FORMS 1:1 COMPLEX WITH BOTH Mg2+ and Ca2+ and after buffering at this pH a 10mL aliquot of the sample required 26.81mL of 0.003474M EDTA for titration The ...
March 12, 2012 by TOM

chem
I am having lots of trouble with these questions: Classify each of the following reactions in as many ways as possible. (Select all that apply.) a)2 Rb(s) + Br2(g) 2 RbBr(s) you can select: -acid-base -double-displacement -gas evolution -oxidation-reduction -precipitation -...
November 29, 2010 by hannah

Equilibrium Consentration
At a certain temperature, the reaction H2(g)+ Cl(g)=2HCl(g)has Kc = 5 x 10^8. If a reaction mixture at equilibrium contains 0.48 M of H2 and 0.23 M of Cl2, what is the concentration of HCl? I was wondering if I had to rearrange the equilibrium constant equation to work out the...
March 28, 2016 by Alice

CHEMISTRY
The equilibrium constant for the reaction, SO2(g)+ NO2(g) <----> NO(g)+ SO3(g) has been experimentally determined as a function of temperature. The results are presented in the table below. T (°F) KC 285 662 752 156 842 93.4 932 59.6 1022 40.2 If 0.0791 ft3 SO2, 0.158 ...
March 24, 2011 by Josh

Chemistry
what is the balanced net ionic equation for the reaction of ascorbic acid with triiodide ion C6H8O6 ==> C6H6O6+ 2H^+ + 2e 2e + I3^- ==> 3I^- ==================== These are to two half equations. Add them and cancel the electrons.
October 8, 2006 by mary

Science
Can someone please tell me what acid does to DNA? Ive looked everywhere and can't find anything simple enough to understand and need an answer really quick. thanks!
April 9, 2008 by John

Chemistry 2 Ap
can someone check these for me ? Lead(IV)nitrate-- Pb(No3)4 Aluminumoxide-- Al2O Ammoniumphosphate-- NH4(Po4) Perchloric Acid-- Clo4 Copper(II)bromide-- CuBr2 Thankss!
September 22, 2008 by jecce.

Chemistry
what are the coumpound names? Ex: H20: Dihyrdogen monoxide PH3 H3N H3PO2 CuSO4 P2O2 H2SO5 What is the formula? Ex: Nitric Acid: HNO3 Titanium (IV) Oxide:
January 12, 2011 by Anonymous

chemistry
For the ionization of a weak acid, HA: a) give the expression for Ka. b) after taking the log 10 of both sides ofthe quation in "a" sp;ve fpr pH. c) under what conditions would pH be equal to pK?
February 28, 2011 by redgy

Stoichiometry
If 0.500 g of sulfur dioxide from pollutants reacts with excess water and oxygen found in the air, what mass of sulfuric acid can be produced? 2H2O(l)+O2(g)+2SO2(g)= 2H2SO4(aq)
April 19, 2011 by YV

Stoichiometry
If 0.500 g of sulfur dioxide from pollutants reacts with excess water and oxygen found in the air, what mass of sulfuric acid can be produced? 2H2O(l)+O2(g)+2SO2(g)= 2H2SO4(aq)
April 19, 2011 by YV

Grade 12 Bio Please try to help me
If a life-form has six different bases-ABCDEFG. the percentage composition of A,B and C is same as EFG. Hypothesis the structure of the nucleic acid.
May 9, 2011 by sabrina

Biology
Hypothesis on finding if the dissappearance of a particular fish species from a lake in the northwestern united states is due to acid rain resulting from industrial air pollution
August 20, 2011 by Betty

chemistry
what volume of 0.1 moldm-3 HCL acid would be required to dissolve 2.3 grams of calcium carbonate equation CaCO3+2HCL----------=CaCl2+CO2+H20 (WATER)
September 25, 2011 by aisha

cheistry
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of hydrosulfuric acid and potassium hydroxide are combined. Assume excess base.
November 17, 2011 by savannah

chem
A distribution curve shows how fractions of non-ionized acid and its conjugate base vary as a function of Ph. The curves of the plot of [CH3COOH] vs. [CH3COO-] vs. PHwill intersect at a Ph of What?
April 22, 2012 by court

Chemistry
Write a balanced chemical equation that represents the reaction between methane and hydrochloric acid. CH4+HCl-> I'm not quite sure what happens...help please? Thanks in advance!
June 6, 2012 by Cicilia

chemistry
A 0.446g sample of an unknown monoproctic acid was titrated with 0.105 M KOH The molar mass is 120g/mol. What is the PKA value? Pls helps me again
August 19, 2012 by Fai

Chemistry
When titrating a weak base with a strong acid, what effect will washing the tip of the burette and sides of the beaker with distilled water have on the pKa and equivalence points?
March 31, 2013 by C

Chemistry
When titrating a weak base with a strong acid, what effect will washing the tip of the burette and sides of the beaker with distilled water have on the pKa and equivalence points?
March 31, 2013 by C

chemistry
How much hydrogen gas (mL) would be rpoduced at 25 degreez C and 1.34 atm if 5.5 grams of zinc reacts with 25mL of 0.05 M hydgrchloric acid? Please respond with how u found the answer
May 25, 2013 by mb

chemistry
This type of functional group is often sweet smelling and may be used as a fragrance. When it reacts with water it will produce a carboxylic acid and an alcohol. I chose ester but it is wrong
May 10, 2014 by bekah

chemistry
What is the conjugate acid base in this equation: h2so4+h20---Hso4^-+h3o^+ 2:) which phase of matter can act as a solvent. A.gas B.solid C.liquid D.all the above
July 18, 2014 by kody

Chemistry
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. The Ka for HOCl is 3.0 x 10-8 M. What is the pH at the equivalence point? I used the HH formula and got pH=7.52+log(.222)=6.87, but its not right.
March 15, 2015 by JUNDY

Chemistry
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. The Ka for HOCl is 3.0 x 10-8 M. What is the pH at the equivalence point? I used the HH formula and got pH=7.52+log(.222)=6.87, but its not right.
March 15, 2015 by JUNDY

Chemistry - Oxidation-Reduction reactions
how would your calculation of the molarity of KMnO4 be affected if you had added twice as much sulfuric acid and water as was called for in the procedure?
April 19, 2016 by Anonymous

AP Chemistry
At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2SO2(g) + O2(g)<-> 2SO3(g) What concentration of SO3 would be in equilibrium with 0.250 moles of SO2 and 0.885 moles of O2 in a 1.00 liter container at this temperature? Note: These latter ...
November 27, 2013 by Gabriella

Chemistry
CaCO3(s) <--> CaO(s) + CO2 (g) A 5.9-gram sample of CaCO3 (molar mass = 100.) is placed in an evacuated 2.00L container and heated to 200^oC. Equilibrium is reached when 5.15% of the CaCO3 has decomposed. 1)Write the Kp expression for this reaction and calculate its ...
March 3, 2011 by Patrick

Chemistry
What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The normal boiling ...
February 4, 2014 by Ren

Chemistry
Classify the following type of stoichiometry problem: How many grams of zinc must react with an excess volume of hydrochloric acid to yield 0.500 g of zinc chloride? mass-mass problem mass-volume problem volume-volume problem mole-mole problem none of the above
March 7, 2016 by Jacquie

Chemistry
Two beakers are placed in a sealed container surrounded with air. In one beaker is pure H2O (Beaker A) and the other beaker is a 10% Sugar solution (Beaker B). As the system approaches equilibrium what change occurs to the volume of water in beaker A? What happens to the ...
January 17, 2008 by Anonymous

Chemistry
I am having a lot of trouble understanding acid-base reactions. I was able to struggle through most of the homework, but I'm not usre about these questions. 1) Can an acidic solution be made less acidic by adding an acidic solution? 2) Pennies manufactured after 1982 are made ...
December 4, 2009 by Mary

Chemistry
Can someone check my answers for the following questions...btw HAPPY HOLIDAYS TO EVERY AT JISKHA! 1)As the magnitude of Keq increases, the amount of product formed in a reversible reaction: REMAINS CONSTANT 2)The Keq of reacion 4 x 10-7. At equilibrium: THE REACTANTS ARE ...
December 24, 2007 by Anonymous

Chemistry
How do you calculate the concerntartion of vinegar?
October 7, 2011 by Kefiloe

science
Can some one help me I don’t know what to take out from the aspirin molecule, for the following structures? I have to generate a copy of the molecular structure of aspirin and then for each of the molecular features listed in (i) – (iii) have to produce a related structure ...
June 29, 2007 by katie

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