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October 23, 2014

Search: N2H4(g) + H2(g) 2 NH3(g)

Number of results: 1,523

Chemistry
Which one of the following cobalt complexes should be the most stable? a. [Co(NH3)6]2+ b. [CO(NH3)6]3+ c. [Co(en)3]3+ d. [CoF6]3 I think the answer is c, but not really sure. Can Dr.Bob explain ? Thanks
May 20, 2012 by Swaastikaa

Chemistry
Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]ClH2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism optical isomerism (b) [Pt(...
July 17, 2013 by Sara

Chemistry
Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]ClH2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism optical isomerism (b) [Pt(...
July 17, 2013 by Sara

Chemistry
Consider the following equilibrium: NH4Cl(s)--->NH3(g) + HCl(g) Suppose a vessel containing NH4Cl(s), NH3(g) and HCl(g) is at equilibrium. If the volume of vessel is instantaneously doubled while keeping the temp constant when a new equilibrium is reacted, which of the ...
February 10, 2013 by Lisa

Chem
A 0.170-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 108.
December 5, 2013 by Mandy

Chemistry
Consider the following equation: 4NH3(g) + 5O2(g)----> 4NO(g)+6H2O(g) a. How many liters of oxygen are required to react with 2.5 L NH3? Both gases are at STP b. How many grams of water vapor can be produced from 25 L NH3 if both gases are at STP? c. How many liters of NO ...
November 29, 2010 by Ivy

chem
Consider the decomposition of ammonium hydrogen sulfide: NH4Hs(s) <--> NH3(g) + H2S(g) In a sealed flask at 25*C are 10.0 g NH4HS, ammonia with a partial pressure of .692 atm, and H2S with a partial pressure of .0532 atm. When equilibrium is established, it is found that...
April 9, 2007 by Chris

Chemistry
Hydrazine, N2H4 can be made (on paper) by reaction of molecular nitrogen and molecular hydrogen, 2 H 2 ( g ) + N 2 ( g ) --> N 2 H 4 ( g ) and suppose that the equilibrium constant Kp has the value 110^3. (a) A stoicheometric mixture of H2 and N2 is placed in a container ...
August 13, 2011 by Katherine

chemistry
N2+2H2=N2H4 What is the concentration of H2 at equalibrium when (N2)=.033 and (N2H2)= .042 M? Keq=5.29
April 26, 2012 by kendra

Chemistry
At STP, if 4.20L of O 2 reacts with N2H4 how many liters of water vapor will be produced?
April 1, 2014 by Marion

Chemistry
Two questions: 1) NaCl+H2SO4+NH3=Cl2+? 2) KF+AgNO3+NH3=? I've been agonising over these for the past few hours, but can't seem to make any headway. Please help.
August 24, 2007 by Dan

Chemistry
Given the following equation: NH3 +O2 NO + H2O Calculate the number of grams of ammonia needed to form 40.12 moles of nitrogen monoxide. ok so is this how its to look 4(NH3) + 5(O2) --> 4NO + 6(H20)
November 19, 2010 by peter

Honors Chemistry
N2+ 3H2--> 2NH3 How many grams of NH3 can be produced from the reaction of 28 g N2, and 25 g of H2?? I got 34g NH3 and 140 NH2 2. How much of the excess reagent in problem 1 is left over?
January 28, 2011 by Emelia

College Chemistry
What volume of the solution in 5a would be necessary to react completely with 23.00mL of 0.549M NH3 according to the equation: NiSO4+6NH3 -> [Ni(NH3)6]SO4 The molarity of ta is 1.667 x 10^-4M
October 25, 2012 by Bill

chemistry
calculate the equilibrium constant for the reactionas written at 940K. NH4Cl->NH3+HCl delta H= NH4Cl -1779, NH3 -46, HCl -92 delta s= NH4Cl - 682,NH3 192,HCl 187 i dont know how to solve for the equilibrium constant without the concentration of the values???
April 14, 2008 by david

chemistry
A 0.140-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2+ ions at equilibrium? Assume the formation constant of Co(NH3)6^2+ is 5.0e31. Please help, I don't know how to do this problem.
May 6, 2012 by Anonymous

chem 2
I just need help setting up this equation. NH3 is titrated with HCL. Does this mean the reaction is this? NH3 + HCL --> NH4 + CL- ??
July 6, 2009 by Anonymous

Chemistry
You have a stock solution of 15.0 M NH3 . How many milliliters of this solution should you dilute to make 1200ml of 0.280 M NH3 ?
December 3, 2009 by Melissa

Chemistry
Please help with these 2 stoichiometry questions. How many grams of NH3 can be produced from 3.98 mol of N2? How many grams of H2 are needed to produce 10.41g of NH3?
September 27, 2010 by Sarene

Chemistry
You have a stock solution of 15.8 M NH3 . How many milliliters of this solution should you dilute to make 1350 mL of 0.300 M NH3
September 13, 2011 by Jennie

chemistry
In the reaction of N2 and H2 to produce NH3, how many moles of H2 will produce 37.9 grams NH3 if sufficient N2 is present? Do not enter units with your answer.
October 21, 2011 by Charles

Chemistry
A solution is prepared by dissolving NH3(g) in water according to the following equation. NH3(g) + H2O(l)=NH4^+(aq)+ OH^-(aq) If the pH= 9.60 what is the [OH-] in the solution.
November 30, 2011 by Julia

Chemistry
100 mL of each of the following solutions is mixed; which one of the mixed solutions is a buffer? A) 1.0 M NH3(aq) + 0.6 M KOH(aq) B) 1.0 M NH4Cl(aq) + 1.0 M KOH(aq) C) 1.0 M NH3(aq) + 0.4 M HCl(aq) D) 1.0 M NH4Cl(aq) + 0.4 M HCl(aq) E) 1.0 M NH3(aq) + 1.0 M HCl(aq) I am ...
March 14, 2010 by Trixie

Chemistry
a)How many grams of NH3 can be produced from 2.84mol of N2. b)How many grams of H2 are needed to produce 14.86g of NH3? balanced equation: 3H2+N2->2HN3
September 21, 2010 by Amy

chemistry
What volume (L) of an aqueous solution that is 24.00 % by mass ammonia (NH3) and has a density of 0.910 g/mL must be taken to obtain 61.2 g of ammonia (NH3) ?
October 1, 2010 by axl

chemistry
complete and balance the following equation: CoCl*6H2O+ NH4Cl+ NH3+ H2O ---> [Co(NH3)5Cl]Cl2+ H2O
December 1, 2010 by anon

chemistry
What concentration of ammonia, [NH3], should be present in a solution with [NH4+]= 0.734M to produce a buffer solution with pH= 9.13? For NH3, Kb= 1.8x10^-5
April 13, 2011 by rooftops

General chemistry
Identify the classification of isomers illustrated by [Co(NO2)(NH3)5]2+ and [Co(ONO)(NH3)5]2+. are this linkage isomers?
May 1, 2010 by gaby

chemistry
Calculate the hydroxide ion conc. and the % ionization @20oC in a 1.25 M NH3 solution. The Kb for NH3 = 1.70x10-5 @20oC.
June 10, 2010 by bob

chemistry
.70 L of a buffer solution that is 0.120 M in NH3 and 0.450 M in NH4Cl are diluted to 5.80 L with distilled water. What is the pH of the buffer? Kb of NH3 = 1.8 x 10^-5
October 8, 2010 by kim

chemistry
How many grams of NH3 form when 27.5L of H2 (measured at STP)react with N2 to form NH3 according to: N2(g) + 3H2 (g) = 2NH3 (g)
November 22, 2010 by Susan

chem
what is the balance reaction when HCL reacts with NH3? is it HCl+NH3-->NH4Cl am I right correct me pls.
October 26, 2012 by carina 78

Chemistry
Calculate the mass of AgCl that will dissolve in 100ml of 2 M NH3 ksp AgCl = 1.7x10^-10 and Kf of Ag(NH3)2 = 1.6x10^7
October 25, 2013 by Michelle

chemistry
3 h20 + N2 yields 2 NH3 how many moles of ammonia NH3 would be produced by reacting 6.00 moles of hydrogen H2 with an adequate amount of nitrogen N2
April 27, 2009 by kathy

chemistry
How many grams of NH4Cl must be added to 0.490 L of 1.70 M NH3 solution to yield a buffer solution with a pH of 9.40? Assume no volume change. Kb for NH3 = 1.8 10-5.
October 26, 2011 by kelly

Chemistry
An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base?
March 8, 2013 by Matthew

chemistry
Given that 4 NH3 + 5 O2 4 NO + 6 H2O, if 3.00 mol NH3 were made to react with excess of oxygen gas, the amount of H2O formed would be?
April 11, 2014 by Anonymous

chemistry
At 674.5 K the equilibrium concentrations of N2, H2, and NH3 were 0.1614 M, 0.1128 M, and 0.005892 M, respectively. What is the equilibrium constant for the reaction below? 2 NH3(g) → N2(g) + 3 H2(g)
May 6, 2014 by Andy

chemistry
Haber process at 127C: 1N2 + 3H2 -----> 2 NH3 [NH3] @ equilibrium= 0.031M [N2] @ initial =0.85 M [H2] @ initial =0.0031 M Calc Keq for the reaction. This is how I did it: 1N2 + 3H2 -----> 2 NH3 i:0.85 0.0031 0 c: -X -3X +2X e: 0.85-X 0.0031-3X 0.031=2X X=0.0155 Keq= ([0....
May 11, 2012 by Holly

chemistry
[Cu(NH3)4]2+ + SO4(aq)2 + H2O [Cu(NH3)4]SO41H2O What is the theoretical yield of the products?
September 14, 2010 by Leila

Chemistry
How many grams of Ammonia, NH3 can be made from 250. grams of N2(g) ? ( first Balance the equation) N2 (g) + H2 (g) > NH3 (g)
March 10, 2011 by Dupree

chemistry
In raction NH3 + 5 O2 --> 4 NO + 6 H20 . I 1 mol NH3 and 1 mol O2. what is the limiting reactant? ow Much NO will form?
February 13, 2013 by Fakhrywik

CHEMISTRY HELP!
Calculate [Cu2+] in a 0.10 M CuSO4 (aq) solution that is also 6.4 M in free NH3 . Cu2+(aq) + 4NH3(aq) --->[Cu(NH3)4]2+ (aq) kf = 1.1 x 10^13
March 2, 2013 by Leslie

chemistry
When NH3 is prepared from 28 g of N2 and excess H2, the theoretical yield of NH3 is 34 g. When this reaction is carried out in a given experiment, only 30 g is produced. What is the percent yield?
July 23, 2010 by Anonymous

chemistry
A buffer solution is 1.00 M in NH3 and 1.10 M in NH4Cl. If 0.230 moles of NaOH are added to 1.00 L of the buffer, what is its pH? Assume the volume remains constant. Kb of NH3 = 1.8 multiplied by 10-5.
October 8, 2010 by nick

chemistry
Ammonia gas is passed into water ,yielding a solution of density 0.93 g/cm^3 and containing 18.6% NH3 by wieght .The mass of NH3 per cc of the solution is?
July 6, 2011 by solution...

Chemistry
Rank the following molecules in order of increasing boiling point. NH3, CaCl2, Ar, CO, HF This is what I have, am I correct or on the right track? CaCl2, HF, NH3, CO, Ar
March 29, 2013 by Stacie

Equilibria
How to calculate the [Cu2^+] in a solution that was initially 1.0 M NH3 and 0.10 M Cu2^+ ? Kf value for Cu(NH3)4 ^ 2+ = 2.1*10^13 Please give me a detailed way of doing this problem. Thank you very much
October 17, 2014 by Ved G

Chem
1N2(g) reacts with H2(g) to form NH3(g), gaseous ammonia. Show balanced thermochemical equations based on both one mole and two moles of NH3(g). Determine Ho ( for both reactions using Table 6.2 (Hof). Use the summation equations. Show your calculations N2 +H2...
October 20, 2014 by Feather

Chemistry
The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. a. Calculate the value of the Henry's Law constant for NH3 b. Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr.
December 6, 2011 by JD

urgent chem help ( dr bob plz)
A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.50? ============================ first i did was ph = 11.50 PH= 14-11.50 = 2.5 10^-2.5 = 0...
February 17, 2009 by javeya

Chemistry
CuSO4(aq) + 4NH3(aq) → [Cu(NH3)4]SO4(aq) I know that adding nitric acid will reverse the reaction. But what is the actual chemical equation? [Cu(NH3)4]SO4(aq) + HNO3(aq) --> ???
June 10, 2010 by elin

CHEM
How much heat is released in the formation of 10 liters of NH3(g) at 25 C and 1 atm, given : 2N2+3H2 ----> 2 NH3 HEAT OF FUSION IS - 92.6 KJ show steps please
November 18, 2010 by MAX

Chemistry
The boiling point of phosphine, PH3(-88C) is lower than that of ammonia, NH3(-33C) even though phosphine has twice th molar mass of NH3. Why?
March 8, 2011 by MMPM

chemistry
An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base? Answer in units of mL
December 18, 2012 by lauren

chemistry
An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base? Answer in units of mL
December 18, 2012 by lauren

AP Chem
Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 mL of each of the following buffered solutions: a. .050 M NH3/.15 M NH4Cl b. .5 M NH3/ 1.5 M NH4Cl
April 3, 2013 by Kristen

Chemistry
Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 mL of each of the following buffered solutions: a. .050 M NH3/.15 M NH4Cl b. .5 M NH3/ 1.5 M NH4Cl
April 3, 2013 by Joyy

chemistry
what are the symmetry elements for: cis-CoCl2(NH3)4 and trans-CoCl2(NH3)4 would it be C2 S2?
February 25, 2009 by erin

Chemistry
When 5 mL of 0.10 M HCl are added to 10 mL of 0.10 M NH3, what is the approximate pOH? Kb for NH3 is 1.8 x 10^-5. I get pOH between 4 and 5. Is that right?
May 6, 2010 by Mary

Chemistry
if u add if you add 2.0 ml of 10.0 M HCl to 500 ml of a .10 M NH3, what is the pH of the resulting solution? for NH3, kb=1.8X10^-5
February 13, 2011 by Kate

CHEMISTRY HELP !!!! Check
using Kb, for NH3 (from Appendix E), calculate Ka for the NH4+ ion. Kb for NH3 is 1.81 x 10^-5 Ka for NH4+ is Kw / Kb = 10^-14 / 1.81 x 10^-5 = 5.52 x 10^-10
April 10, 2014 by Tim

Chemistry
Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 Would it be C?
November 8, 2009 by Casey

Chemistry
With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) H = -906 kJ What is the enthalpy change for the following reaction? NO(g) + 3/2 H2O(g) NH3(g) + 5/4 O2(g)
October 18, 2008 by Glenna

Chemistry
CO2(g) + 2 NH3(g) CO(NH2)2(s) + H2O(g) What volumes of CO2 and NH3 at 193 atm and 450.C are needed to produce 2.54 kg of urea, assuming the reaction goes to completion?
October 19, 2011 by Nicholas

ap chemistry
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 29 mL of 0.0500 M NH3 solution? HCl is a strong acid, Kb=1.810−5 for NH3. Answer in units of pH
February 4, 2014 by gabriella

Chem
given the reaction: agcl(s) +2nh3 (aq) <--> ag (nh3)2 +(aq) + cl^- (aq). if more ammonia, nh3 is added to the system at equilibrium the a) amount of agcl increases b) system cannot achieve equilibrium c) rate of the forward reaction decreases d) concentration of cl^- ...
June 3, 2013 by Mad

Chemistry
Ammonia (NH3) is a weak base with a Kb= 1.8 X 10^-5 and hydrochloric acid (HCl) is a strong acid. What is the pH of a mixture made by adding 6.61 grams of NH4Cl to a 412 ml of a 0.180M solution of NH3?
May 12, 2009 by Chelsea

Chemistry
I'm having trouble giving the formula for this coordination compound: sodium diamminetetrachloroplatinate(IV) I think that it has to have a charge because it has Na+ and [Pt(NH3)2Cl4] (which is neutral), but Na[Pt(NH3)2Cl4]+ is wrong. Please help!
March 26, 2011 by nikki

chemistry
Find the solubility of AgBr in 3.9 M NH3 [Ksp of AgBr = 5.0 10-13 and Kf of Ag(NH3)2+ = 1.7 107]
November 4, 2011 by courtney

Chemistry
How many grams of NH3 can be produced from 3.26 moles of N2? How many grams of H2 are needed to produce 13.99 g of NH3?
November 6, 2011 by Natalie

chemistry
Posted by Bret on Friday, March 16, 2007 at 10:44am. what is the oxidation number for nitrogen in the following? NH3 NO2 1- N2 NO2Cl N2H4 For Further Reading chemistry - bobpursley, Friday, March 16, 2007 at 11:26am We will be happy to critique your thinking or work. chemistry...
March 16, 2007 by Bret

chemistry
if the rms speed of NH3 molecules is found to be 0.510 km/s what is the temperature (in Celcius)? can someone solve this using the formula c=((2.55*R*T)/M)^1/2 c is the speed r is 8.314 constant M is the molar mass of NH3 17.031
August 5, 2011 by Henry

chemistry
Given--The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. Question #1)-- Calculate the value of the Henry's Law constant for NH3. Question #2)-- Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr.
December 6, 2011 by JD

college chem
Determine the molar solubility of AgBr (Ksp = 5.40e-13) in 2.502 M NH3 if the complex ion [Ag(NH3)2]+ forms with a Kf = 1.70e7 will I need to make an chemical equation using the compounds they give me? and then do an ICE table?
April 5, 2014 by hershi

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
calculate the standard free-energy change for the synthesis of hydrazine from nitrogen and hydrogen. N2(g) + H2(g) right arrow N2H4(l)
March 7, 2013 by Kenneth

Chemistry
Which one of the following pairs of reactants would react together in a Lewis Acid/Lewis Base reaction? a. KOH and HNO2 b. NaOH and HCl c. CH3COOH and HF d. Ag+ and NH3 e. HClO and NH3
February 27, 2011 by Brian

Science
1. A 25.00 sample of 0.723M HClO4 is titrated with a 0.273M KOH solution. The H3O+ concentration after the addition of 10.0mL is___M. 2. Determine the pH of a 0.188M NH3 solution of at 25 degrees C. The Kb of NH3 is 1.76x10-5.
March 20, 2012 by Shayla

chemistry
A solution is prepared by dissolving 15.0 g of NH3 in 250.g of water. The density of the resulting solution is 0.974 g/ml. The mole fraction of NH3 in the solution is?
March 5, 2010 by CC

chem
What would be the reaction between Mn2+ and NH3? is it Mn(NH3)? and would this solution react with HNO3, considering it would already have NO3 in it?
November 1, 2010 by nicole

Chem 011
I can not figure out how many mols are in 102grams of NH3? mols = grams/molar mass. mols NH3 = 102/17 = ??
April 10, 2007 by Stephanie

Chemistry
If some NH4Cl is added to an aqeous solution of NH3: A. pH of solution will decrease B. PH will not change C. pH will increase D. NH4Cl cannot be added to NH3 E. The solution will not have pH I think the answer is B, because if NH4Cl is added to the solution of NH3, then ...
March 7, 2013 by Robby

Chemistry
Which of the following result in buffered solutions when equal volumes of the two solutions are mixed? a.) .1 M HCl and .1 M NH4Cl b) .1 M HCl and .1 M NH3 c.) .2 HCl and .1 M NH3 d.) .1 M HCl and .2 M NH3 By def. I know that a buffed solution is made from a weak base and it's...
April 9, 2013 by Marcus

science chemistry
N2 (g) + 3H2 (g) -> 2NH3 (g) assume 4 molecules of nitrogen and 9 molecules of hydrogen are present. after complete reaction, how many molecules of ammonia are produced. do i go from N to NH3 or H to NH3?
October 5, 2011 by cook

chemistry college
Consider the titration of 30.0 mL sample of 0.050 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant (acid)have been added: a)0 mL, b)20.0mL, c)60.0mL, d)65mL Kb for NH3 is 1.8 x 10^-5
December 4, 2013 by Taylor M

CHEMISTRY
4NH3 + 7O2 = 4NO2 + 6H2O HHOW MANY MOLES OF AMMONIA WILL BE REQUIRED TO PRODUCE 10.0 MOLES OF WATER? The equation tells you 4 mols NH3 will produce 6 mols H2O. Can you set up a proportion to make that work? For example, 2 mols NH3 would produce 3 mols H2O and 8 mols NH3 would ...
July 17, 2007 by Janice

Chemistry
The weak base-conjugate acid buffer used in this laboratory consists of a weak base ammonia, NH3, and its conjugate acid ammonium chloride, NH4Cl. If the NH3 concentration is 0.05 M and the NH4Cl concentration is 0.05 M, what is the pH of the buffer? Kb for NH3 is 1.8*10^-5
March 18, 2010 by E

CHEMISTRY
A solution is prepared by dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is 0.974 g/mL. The mole fraction of NH3 in the solution is __________. A) 16.8 B) 0.940 C) 0.0597 D) 0.922 E) 0.0640
September 26, 2010 by Jessie

Chemistry
Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^-5 This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for H3O^+, then pH = - ...
May 31, 2007 by Raj

Chemistry
Write a net ionic equation that represents the reaction: 1. ionization of HCl3 in water: My answer: HClO3+H20->H3O+ClO3 2. NH3 functioning as an Arrhenius base: Mine: NH3+(OH)->NH4+O The first one is ok but you need to show the + charge on the H3O^+ and the - charge on ...
February 15, 2007 by Liz

Chemistry
In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate. The problem is that the products ( Cu(NH3)4 and SO4) should be soluble, no? The question is then, what is the percipitate? The ppt is Cu(OH)2. The dark blue solution is Cu(NH3)42+ ...
December 17, 2006 by Karl

chem
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? (Select all that apply.) NaCN and HCN NaCN and NaOH HCN and NaOH HCl and NaCN HCl and NaOH and Which of the following gives a buffer solution when equal...
April 12, 2011 by Rebekah

chemistry
Ammonia, NH3, can be made by reacting nitrogen with hydrogen. N2 + 3H2 = 2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react with enough N2? Please help!
March 19, 2012 by Britt

Chemistry
Dissolving one mole of salt in water yields two moles of ions. A:NH4[Pt(NH3)Cl3] B: tris(ethylenediamine)cobalt(III) sulfate C: tetraaquadichloronickel(IV) chloride D: [Co(NH3)2(en)Cl2]Cl E: [Co(en)2Cl2]Br F: sodium hexacyanoferrate(II) None of these compounds
November 4, 2011 by Amanda

Chemistry
Can you check my calculations, please? It's for a lab we did in order to find the the enthalpy of formation of NH4Cl(s). My final answer was -299.4 kJ, while the theoretical, or actual, value is -314.4 kJ. It was the closest value out of everyone in the entire class. I'm not ...
February 20, 2013 by a Canadian

Chemistry
Ammonia, NH3 is freely soluble in water, and has the value Kb=1.8x10^-5. If the pH of an ammonia solution is 11.4272, then what original concentration of NH3 (molarity) was used to make up the solution?
July 27, 2010 by Sam

Chemistry
Given the following information: Ag^+(aq) + Cl^-(aq)<-->AgCl(s) Keq=1.8x10^-1 Ag^+(aq) + 2NH3(aq)<->Ag(NH3)2^+(aq) Keq=8.2x10^3 Explain why the AgCl(s) dissolved when NH3 was added to the test tube.
April 3, 2011 by Gina

chemistry
A 130.0 mL buffer solution is 0.100 M in NH3 amd 0.135 M in NH3 and 0.135 M in NH4Br. What mass of HCI could this buffer neutralize before the pH fell below 9.00?
November 6, 2011 by Samuel

Chemistry
Calculate the molar enthalpy for the following reaction. HCl(aq) + NH3 (aq) --> NH4Cl (aq). HCl = 50 ml (2.00M) NH3 = 50 ml (2.05 M) Delta T = 9.28 degrees Celsius. Ccal = 28.9J/g degrees celcius.
November 12, 2012 by Emma

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