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March 28, 2017

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Number of results: 41,668

chemistry
2Na3PO4(aq)+3 Ba(NO3)2(aq)---->Ba3(PO4)2(s)+6NaNO3(aq) a solution containing 3.50g of Na3PO4 is mixed with a solution containing 6.40g of Ba(NO3)2 how many grams of product can be formed? and if the above reaction resulted in 3.659 g of white powder, what is the percent ...
November 17, 2011 by mckayla

Chemistry
a 2.16g sample of Pb(NO3)2 is heated in an evacuated cylinder with a volume of 1.18L. the salt decomposes when heated: 2Pb(NO3)2 (s)_> 2PbO (s) +4NO2 (g) +O2 (g) Assuming complete decomposition, what is the pressure in the cylinder after decomposition and cooling to a final...
January 3, 2012 by mary

chemistry
In terms of chemical bonds and electrons, what kinds of changes occur between atoms when substances undego chemical reactions?
November 24, 2008 by Akshay

college chemistry
4{C3H5(NO3)2}(l)--->6N2(g)+O2(g)+12CO2(g)+10H2O(g) If a dynamite of 100mL needs 3.5atm to explode, what minimum mass of C3H5(NO3)2 do I need to put in at 25 degree celcius? I tried to do this by finding the number of moles by the formula PV=nRT and then convert that into ...
October 21, 2008 by ashley

chemistry
A 40 mL sample of 0.25 M NaCHOO is titrated with 0.2 M HCl. What is the pH of the solution after 140 mL of HCl has been added?
March 2, 2011 by Eddy

Chemistry
How would you make 500 mL (0.500L) of a 0.200 M HCl solution from stock concentrate of 12 M HCl?
June 8, 2010 by Karla

Chemistry
How would you make 500 mL (0.500L) of a 0.200 M HCl solution from stock concentrate of 12 M HCl?
June 8, 2010 by Karla

Chemistry
How would you make 500 mL (0.500L) of a 0.200 M HCl solution from stock concentrate of 12 M HCl?
June 8, 2010 by Karla

Biochemisty
If I take 5mL of a TRIS/HCL buffer with a pH of 7.4 and add 1mL of 1M HCL, how do I determine the new pH?
January 12, 2011 by Rose

Chemistry
Potency of HCl(l) is 35% (w/w) and density 1.19 g/cm3. Calculate the molarity of the Acid? [Molecular Weight of HCl is 36.5].
January 25, 2011 by Anik

Science: Chem
How many milliliters of 0.10 M HCl must be added to 52.0 mL of 0.40 M HCl to give a final solution that has a molarity of 0.25 M?
November 1, 2011 by Lach

chemistry
What is the concentration of an HCl solution if 23.1 mL of HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 I cannot get the right answer
December 5, 2011 by corey

chemistry
What is the molarity of a solution that contains 31.0 HCl in 5.00kg water? (molar mass of HCl=36.46 g/mol)
January 22, 2012 by jim

Chemistry
How many grams of a 12.5% (w/w) aqueous solution of HCl do you have to measure out if yo need 32g Of HCl?
August 9, 2012 by Jim

chemistry
How would a chemist make up 100g of 10% aqueous solution of HCl (using 12M HCl)
September 9, 2012 by Dena

Chemistry
How many milliliters of 1.5 M HCl must be transferred from a reagent bottle to provide 25g HCl for a reaction?
September 8, 2013 by Anonymous

Chemistry
What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?
March 25, 2016 by Wilson

chemistry
In quality control of raw materials for pharmaceutical production often used foul reactions to prove that raw materials in salt form containing the appropriate salt. Hydrochloride (eg. Amitriptyline hydrochloride) can be detected for example by precipitating the chloride ions ...
September 9, 2016 by Maria

chemistry
A bottle of HCL is 14.0M and has a density of 1.08 grams/mL. What is the molality of the HCL?
April 17, 2008 by billy bob j

Chemistry
How will you prepare 10mL of .050 M HCl from a .10 M solution of HCl?
February 22, 2010 by Danielle

Chemistry
Which bond is polar covalent? a) H2 b) Cl2 c) HCl d) O2 is it HCL ?
December 2, 2010 by Anonymous

Chemistry
How many moles of HCl are present in a 50mL 3M solution of HCl?
January 12, 2011 by Jess

Chemistry
How many moles of HCl are present in a 50mL 3M solution of HCl?
January 12, 2011 by Jess

science
50 mL 3.0 M HCl(aq) that means hw much HCl i have to add
March 8, 2011 by Tumpa

chemistry
How would you prepare a standard solution of 1m HCL(5.6 of HCL is 1.18)?
March 8, 2011 by Joy

Chemistry
what is the concentration of hcl when 55 ml of this hcl solution neutralize 15ml of .9m ca(oh)2
February 10, 2012 by Faith

Science
5.00 ml of 1.90M HCl is diluted to 0.400l. calculate the pH of the HCl?
September 25, 2012 by Erik

Chemisttry
How would you make 0.1 N HCL using 12M HCL?
October 23, 2012 by Jeff

Chemistry
How many milliliters of 11.5 M HCl(aq) are needed to prepare 310.0 mL of 1.00 M HCl(aq)?
March 19, 2013 by Robert

Chemistry
What volume of 12.1 HCL (aq) is needed to prepare 250.0 mL of 1.00 M HCL (aq).
February 12, 2017 by Eddie

genetics
5. A female of the genotype a b c / + + + (i.e. heterozygous for three genes on the same chromosome) produces 100 meiotic tetrads (100 cells undergoing meiosis, where recombination can occur). Of these 100 tetrads, 68 show no crossover events. Of the remaining 32, 20 show a ...
March 6, 2014 by manutdfan

Biology III
I'm having wayyy tooo much trouble with this simple assignment. Is there a lab that proves that the light reactions must occur prior to the dark reactions in photosynthesis? So far, I thought of the experiment in which one plant is placed in direct sunlight and the other is ...
January 2, 2008 by Carmen

Chem please help
Which of the following correctly describes the net energy change during a reaction? A. The net change in energy is negative for endothermic reactions where energy is required. B. The net change in energy is positive for endothermic reactions where energy is required. C. The ...
November 25, 2014 by Morgan

Chemistry
If 1.22 grams of magnesium reacts with 100 ml of 6.02 M HCl solution. How much heat is evolved? Density of the HCl solution is 1.10 g/ml. Assume the specific heat of water 4.184 J/gC is the specific heat of the solution. Mg  +  2 HCl   à  MgCl2  +  H2  
July 17, 2012 by Anonymous

Chemistry
In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write the balanced chemical equation for the reaction. 2 SO2 + 1 O2 + 2 H2O --> 2 H2SO4 If 5.45 g SO2 react with excess oxygen and water, how many grams of H2SO4 are...
February 3, 2008 by ChaCha

science
50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
November 5, 2012 by Maya

science
50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
November 5, 2012 by Maya

chemisrty
what is the strongest acid here? H2SO3 H2SO4 H2SeO3 H2SeO4 For oxyacids, the acidity increases with increasing number of oxygen atoms; therefore, H2SO3 and H2SeO3 will be weaker than either H2SO4 or H2SeO4. We have a problem determining which is the stronger of H2SO4 or H2SeO4...
April 30, 2007 by luis

Chemistry
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is 1.86°C/m. (Note that when Ca(NO3)2 dissolves in water Ca2+ and NO32- ions are produced).
May 25, 2012 by Henry

Fundamental Chemistry
Given the balanced reaction below; write out the balanced ionic equation and the balanced net ionic equation. Include phase labels and charges where appropriate. Cu(s) + Zn(NO3)2 (aq) → Cu(NO3)2 (aq) + Zn(s)
April 13, 2016 by Dana

Ap Chemistry
Sulfuric acid is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is first burned: S + O2 yields SO2, then it is converted to SO3 using a catalyst: 2SO3 + O2 yields 2SO3. The resulting SO3 is reacted with ...
September 6, 2012 by Chasm

Chemistry
Suppose we have a solution of lead nitrate, Pb(NO3). A solution of NaCl(aq) is added slowly until no further precipitation occurs. The precipitate is collected by filtration, dried and weighed. A total of 10.27g of PbCl2(s) is obtained from 200.0mL of the original solution. ...
April 17, 2013 by Katherine

English
Double Negative You must not speak to (anyone, no one) about our surprise party plans. the double negetive is no one
February 27, 2014 by Mike

Dr.Bob222
this is all my work so far on the limiting reagent problem I asked about yesterday about Calcium nitrate and ammonium fluoride.... 28.42g/164.1= .17318 mol Ca(NO3)2 29.6g/37.042=.79909 mol (NH4)F (1mol Ca(NO3)2 /.17318) x (2mol (NH4)F/x)=.34636 (2 mol (NH4)F/.79909)x(1 mol Ca(...
October 27, 2009 by Brittany

Chemistry
Hi, I posted yesterday with this lab question. "Calculate the molar amounts of NaOH used in the reaction with the HCl solution and with the HC2H3O2. I think I got the answer to that with the help that I received. I had 5 mL of HCl, and I was using .100 M NaOH, so I got 5x10-4 ...
April 22, 2007 by Rachel

Chemistry
Suppose that 50.0 mL of a 0.250 M HCl solution is mixed with 50.0 mL of a 0.100 M Ba(OH)2 solution in a coffee-cup calorimeter. The temperature of the resulting solution increases by 1.76 oC . Calculate DH for the reaction between HCl (aq) and Ba(OH)2 (aq) in kJ per mole of Ba...
November 15, 2014 by Mahnoor

chemistry
for this question How many liters of H2 gas at STP are produced when Zn reacts with 125 mL of 6.00 M HCl? my book answers it this way: 0.125 L x 6.00 mole HCl x 1 mole H2 x 22.4 L 1 L 2 mole HCl 1 mole = 8.40 L of H2 gas where did the 22.4L come from?
April 13, 2011 by Blain

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

chemistry
how many mL of 5% BaCl2 X(multiplied) 2H2O are needed for 0.3500g pure sodium sulfate?
October 13, 2011 by kim

chemistry
From what acid and what base are the following salts made: KBr, NH4NO3, and BaCl2?
February 1, 2012 by maree

chemistry
if the molar mass of BaCl2 is 208.3 g/mol, how many grams are present in 0.25 moles?
March 19, 2013 by sam

chemistry
a. Cl2 + 2NaI → 2NaCl + I2 This is a single replacement reaction. b. 2K + 2HCl → 2KCl + H2 This is a single replacement reaction. c. N2 + 3H2 → 2NH3 This is a synthesis reaction. d. 2KClO3 → 2KCl + 3O2 This is a decompisition reaction
February 11, 2012 by krystal

Chemistry(steps check)
I figured out the NO3- which is 0.13, I'm stuck on the Cl- I have 0.24*2-0.0416= 0.4384 but I'm being told that's wrong What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 mL of 0.24 M calcium chloride? Cl ‾ NO3&#...
June 21, 2013 by Ashley

Chemistry
In the process of separating pb2+ ions from cu+2 ions as sparingly soluble iodates, what is Pb2+ concentration when Cu+2 begins to precipitate as sodium iodate is added to a solution that is initially 0.0010M Pb(NO3)2 (aq) and 0.0010M Cu(NO3)2 (aq)? I know the answer is 1.8*10...
January 29, 2015 by Anonymous

chemistry
How many milliliters of 3.6 M HCl must be transfered from a reagent bottle to provide 20 g HCl for a reaction? Answer in units of mL
August 30, 2011 by Liz

math,chemistry
How much water should be added to 1 liter of 0.12N HCl to prepare exactly 0.1N HCl?
August 23, 2010 by jc

Chemistry
How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?
October 25, 2010 by Bill

Chemistry
By titration it is found that 68.9 mL of 0.122 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
November 22, 2010 by Jason

chemistry
How much water would you add to 12 M HCl to make 650 mL of 1.5 M HCl? Hint: This is a dilution problem
December 14, 2010 by Nathan

chemistry
A 25 mL solution of .5M NaOH is titrated until neutralization into a 50mL sample of HCl. What was the concentration of HCl?
February 22, 2011 by E

chemistry
How many milliliters of 1.4 M HCl must be transfered from a reagent bottle to provide 23 g HCl for a reaction? Answer in units of mL
September 11, 2011 by julie

Chem
How many milliliters of 1.5 M HCl must be transfered from a reagent bottle to provide 25 g HCl for a reaction? Answer in units of mL.
September 11, 2011 by Chandler

Chemistry
How many milliliters of 5.2 M HCl must be transfered from a reagent bottle to provide 22 g HCl for a reaction? Answer in units of mL
September 15, 2011 by Anonymous

chemistry
Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl. H 1.01 Hydrogen 17 Cl 35.45 Chlorine
September 26, 2011 by archie

chemistry
How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?
October 20, 2011 by HElp

chemistry
if 50.0 mLs of HCl of unknown concentration is titrated to neutrality with 90.0 mL of .650 M NaOH. calculate the molarity of the HCl
November 14, 2011 by susan

chemistry
if 50.0 mLs of HCl of unknown concentration is titrated to neutrality with 90.0 mL of .650 M NaOH. calculate the molarity of the HCl
November 14, 2011 by susan

chemistry
indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL
December 6, 2011 by fdg

chem
How many liters of 1.00 M HCl must be added to 50.0 ml of 0.500 M HCl to give a solution whose concentration is 0.750 M?
January 2, 2012 by Anonymous

chemistry
By titration it is found that 66.1 mL of 0.125 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
April 23, 2012 by trae

science
How many milliliters of 4.6 M HCl must be transfered from a reagent bottle to provide 16 g HCl for a reaction? Answer in units of mL
July 24, 2012 by hanan

chemistry
How many milliliters of 5.5 M HCl must be transfered from a reagent bottle to provide 23 g HCl for a reaction? Answer in units of mL
September 13, 2012 by cheri

chemistry
How many milliliters of 5.5 M HCl must be transfered from a reagent bottle to provide 23 g HCl for a reaction? Answer in units of mL
September 16, 2012 by cheri

Chemistry
By titration it is found that 69.9 mL of 0.151 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
November 19, 2012 by Janessa

Chemistry
Question 9 Marks: 2 In the reaction: Zn + 2 HCl ZnCl2 + H2 An excess of Zn is reacted with 300.0 g of HCl. How many grams of H2 will be produced?
March 18, 2013 by Lindt

science
a bottel contains 500 ml of 2.4 M HCL. How much water should be added to dilute it to 1.6 M HCL. Solution
June 16, 2013 by aarti

CHEMISTRY
Calculate the volume in liters required to prepare a 5.00M solution of HCL using 15.4gof HCL.
November 15, 2013 by BIBI

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
April 27, 2014 by Morgan

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
April 27, 2014 by Morgan

Chemistry
If you have 0.150 M HCl solution available, calculate the volume of HCl(aq) necessary for this reaction. _______ml
June 24, 2014 by amber

Chemistry
What is molarity of an HCl sloution if 45.0mL of 0.250 mol/L KOH are needed to neutalize 12.3mL of HCl?
December 1, 2014 by Kathy

chemistry
Mg+2Hcl---mgcl2+h2 volume of h2=40ml Hcl is 6M what mass os h is obtained by addin excess hcl to 6m of magnesium
March 10, 2016 by suni bohr

Chemisty
By titration it is found that 12.1 mL of 0.130 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
April 27, 2016 by Tara

chemistry........help!! =)
MaVa = MbVb can be used for the reaction between HCl and NaOH. Can it be used for the reaction between NaOH and H2C2O4 (oxalic acid, which can be found in rhubarb leaves, contains 2 acidic protons)? Explain your answer showing the balanced equation
November 17, 2010 by Stacy

Double facts - 2nd Grade
Choose all the double facts you can use to find the sum of 2+3? 1. 2+2 2. 5+5 3. 3+3 4. 1+1
October 21, 2014 by ASG

chemistry
What is the concentration of NaOH? using this solution (0.04756 M (i think its stand for Molarity) H2SO4) what is the concentration of NaOH in 10.00 ml of a solution, titrate to an end point using 24.22 ml of acid? formula that was given is (H2SO4 + 2NaOH --> Na2SO4 (aq) + ...
March 16, 2012 by star

chemistry
Enthalpy and Entropy in Reactions and Solutions Introduction In the course of most physical processes and chemical reactions there is a change in energy. In chemistry what is normally measured is H (enthalpy change), the change in heat at constant pressure and ignoring any ...
November 30, 2010 by allison

Organic Chemistry Lab
How does the allylic halide behave under SN2 and SN1 conditions? Briefly explain why the allylic halide should be able to undergo both SN2 and SN1 mechanisms. If this is any relevant to the question, we did an experiment on the SN1/SN2 reactivity of alkyl halides, using NaI in...
November 7, 2010 by Crystal

Chemistry
(NH4)2S+CuSO4=
April 22, 2013 by judy

Chemistry!
10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in grams of Pbl2 produced, and find the number of moles of the excess reagent. PLZ explain chemistry - DrBob222, Monday, December 13, 2010 at 4:30pm...
December 14, 2010 by jenni

Chemistry - Density
Automobile batteries contain sulfuric acid. Calculate the number of grams of sulfuric acid in 0.500L of battery acid if the solution has a density of 1.28g/mL and is 38% H2SO4 (small numbers) by mass? Can you please answer this for me? density = 1.28 g/mL mass of 1 L is 1.28 g...
October 5, 2006 by Tracey

chemistry
A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of KOH was required to reach the equivalence point. What is the concentration of the unknown H2SO4 solution? Any help would be greatly appreciated. (:
December 14, 2014 by Luis

mastering chemistry
A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH? (the only problem im having for this question is how to approach it, i know that by adding HCl the concentration of the CB would ...
February 28, 2009 by chma11 student

Chemistry - urgent
The following is part of a procedure for a limit test for sulphates in an NaOH sample:- Dissolve 3.0g of NaOH in 6ml of deionized water, adjust to pH 7 with HCl (approx.7.5ml) and dilute to 15ml with deionized water. Please explain how to perform this procedure. Conc HCl or 1M...
September 21, 2010 by candy

English, grammar
I need some help with this question for one of my units in world englishes please help!? Q. Argue for or against the status of 'double negation' as a 'mistake' on spoken English. I am arguing for so I agree with this status. I believe double negation in spoken English can ...
August 28, 2013 by Anonymous

Chemistry
Tap water that contains Cl− at a concentration of 50 ppm is used to prepare a 0.100 mol/L AgNO3 solution. Does a precipitate form? How much? I don't know how to find out how much precipitate will form but a precipitate will form based on my calculations 50 ppm 0.0014 mol...
May 31, 2015 by Rez

Biotechnology
Consider the titration of 25.0 mL of 0.050 0 M Sn2+ with 0.100 M Fe3+ in 1 M HCl to give Fe2+ and Sn4+, using Pt and calomel electrodes. (a) Write a balanced titration reaction. (b) Write two half-reactions for the indicator electrode. (c) Write two Nernst equations for the ...
December 4, 2016 by Minh

CHEMISTRY 1
What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? Assume that the contribution of protons from H2SO4 is near 100 %. Ba(OH)2(aq)+H2SO4(aq)→ Express your answer as a chemical equation. This is what ...
October 6, 2014 by Run

Organic Chemistry
Hi, I did an extraction experiment. I've got my basic layer, and getting my acidic salt in return. To do this, I am instructed to first "add a small amount of NaCl to help with the product precipitation". Then, again I am instructed to add HCl to "acidify" the solution. With ...
November 3, 2014 by Juan

Chemistry
Can someone show and explain to me step by step how to do the problems? I feel like I am doing it incorrectly. a) The solubility of PbI2 is 3.67 mg per mL. What is the Ksp? b) Three drops of 0.20 M potassium iodide are added to 100.0 mL of 0.010 M lead nitrate. Will a ...
March 25, 2014 by Miki

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