Friday
May 6, 2016

# Search: is NH4+ polar or nonpolar

Number of results: 1,588

Naphthalene
Question: You are about to purify an impure sample of naphthalene by column chromatography. What solvent should you use to elute the sample? My answer: Naphthalene is very nonpolar so a very nonpolar solvent like hexane should be used.
October 22, 2006 by Sheryl

Pre-Calc
Can anyone direct me to learn more about polar coordinates. I'm in online college course and really am confused. In high school, I never heard of polar coordinates. Like they say is the following the graph of point (3,15) and show it on polar grid-I don't get it at all. Please...
September 24, 2011 by Thomas

chemistry
how do u do a redox balance of the following reaction : Fe(NH4)2(SO4)2*6H2O + H2C2O4 + K2C2O4 + H2O2 -> K3Fe(C2O4)3*3 H2O + (NH4)2SO4 + H2SO4 +H2O i only know Fe2+ -> Fe3+ +1e-
May 1, 2008 by danny

chemistry
Write an equation to represent the dissociation of propionic acid (CH3CH2COOH) in water. (Type your answer using the format H2O for H2O and [NH4]+ for NH4+. Use the lowest possible coefficients.)
March 18, 2012 by Anonymous

Chemistry
Write equations for the stepwise formation of each of the following complex ions. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-. Use the lowest possible coefficients.) (a) Ni(CN)42- (b) Mn(C2O4)22-
March 17, 2013 by Howard

Chemistry
Write equations for the stepwise formation of each of the following complex ions. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Ni(CN)4]2- for Ni(CN)42-. Use the lowest possible coefficients.) (a) Ni(CN)42- (b) Mn(C2O4)22-
March 17, 2013 by Howard

Chemistry
How does the 3D structure of SP3 bonds of Carbon, Oxygen and Nitrogen cause them to form polar molecules? How does the three dimensional structure of SP3 bonds of Carbon, Oxygen and Nitrogen cause them to form polar or non-polar molecules? The answer must include a 3d diagram ...
January 23, 2011 by Bam

Biology
most polar molecules and ions cannot enter cells. why? many food particles are polar how do they get into the cell?
August 4, 2008 by Courtney

chemistry
summarize the solubilty behavior of hydrocarbons in water (a polar solvent) and in non polar organic solvents
November 22, 2011 by denis

Chemistry
Acetic acid is a polar molecule and can form hydrogen bonds with water molecules. Therefore, it has high solubility in water. Yet acetic acid is also soluble in benzene (C6H6), a nonpolar solvent that lacks the ability to form hydrogen bonds. A solution of 3.8g of CH3COOH in ...
February 17, 2012 by James

Dr.Bob
A 100.0 mL sample of 0.05 M NH3 is titrated with 0.10 M HCl. Determine the pH of the solution after the addition of 50.0 mL HCl. Here is my work: NH3 + H3O+ --> NH4+ + H2O Before Addition: NH3= 0.005 mol H3O= 0 mol NH4+ = 0 mol Addition: NH3 = 0.005 mol H3O+ = 0.005 mol NH4...
April 16, 2016 by Nevaeh

chemistry
2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the half-reaction ...
March 22, 2013 by jack

Chemistry
2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the half-reaction ...
March 22, 2013 by jack

Chemistry
Why is water liquid and carbon dioxide gas? Based on things like polarity, polar vs. non-polar
March 25, 2009 by Sabrina

chemistry
Can you tell me the geometry(around the carbon/oxygen atom) and whether this is polar or non polar CH3CH3? thx
November 3, 2010 by david

PHYSICS
IS SODIUM IODIDE POLAR OR NON POLAR
December 13, 2008 by brooklinn

chemistry
Do polar and non-polar substances mix
January 13, 2009 by Bob

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

Chemistry
How can you tell if a molecule is polar or non-polar
April 5, 2011 by Mm

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

Chem
Polar or non polar covalent bonds C-H N-H C-C
March 12, 2013 by Rs

Chemistry
I'm trying to find if potassium nitrate is polar or non-polar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.44-3.04 =0.82-0.4 =0.4 =0.42 So the final answer is 0.42 and by looking at the ...
November 10, 2007 by Marty

I got this question marked wrong on a paper. Unfortunately, my prof didn't explain. _________________ subtances can pass through the plasma membrane. I put "nonpolar". What is wrong with this and does anyone know the correct solution/answer? Thanks all. http://www.recreation....

Chemestry
Question 1) Consider the following reaction of calcium hydride (CaH2) with molten sodium metal:CaH2(s) + 2 Na(l) -> 2 NaH(s) + Ca(l) Identify the species being oxidized and the species being reduced? Question 2) Give the names to the binary compounds listed below. Classify ...
July 27, 2015 by Ashley

sceince 2
6. When aqueous solutions of table salt and silver nitrate are mixed, a white solid forms. This solid is ____. (1 point)soluble a precipitate an alloy a solute 7. Stainless steel is an example of a ____ solution. (1 point)liquid-solid solid-liquid solid-solid gas-solid 8. ...
April 17, 2012 by NIKE

Org. Chem.
If benzophenone is nonpolar, how come it is only partially soluble in hexane (nonpolar)? Also, can H bonding occur? Can H bonding occur between benzophenone and methyl alcohol? malonic acid and methyl alcohol? biphenyl and methyl alcohol? Please explain.
September 14, 2009 by Chelsea

org. chem.
If benzophenone is nonpolar, how come it is only partially soluble in hexane (nonpolar)? Also, can H bonding occur? Can H bonding occur between benzophenone and methyl alcohol? malonic acid and methyl alcohol? biphenyl and methyl alcohol? Please explain.
September 14, 2009 by Chelsea

chemistry
What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two atoms that are bonded...
October 5, 2012 by shay

Science
Can you explain how attractions between molecules could cause polar water to have a higher boiling point than a non polar carbon dioxide?
December 1, 2009 by Rose

Chemistry
Identify the molecule that has polar bonds but is non-polar (net dipole moment is 0) a. CHCl3 b. NH3 c. BCl3 d. SCl2 e. H2S
April 29, 2010 by Mary

chemistry
A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?
February 5, 2008 by robert

college
convert 2(NH4)3PO4+3HgSO4=3(NH4)2SO4+Hg3(PO4)2 into complete ionic equation,then net ionic equation
November 4, 2010 by mike

College Chemistry
Given the following equilibrium constants, Ka (NH4^+)=5.6*10^-10 Kb (NO2^-)=2.2*10^-11 Kw=1.00*10^-14 determine the equilibrium constant for the reaction below at 25*C. NH4^+(aq)+NO2^-(aq)f HNO2(aq)+NH3(aq)
March 25, 2010 by Katie

Chemistry
how many kilograms of NH3 are needed to produce 2.90x10^5kg of (NH4)2SO4? the balanced equation is: 2 NH3 + H2SO4 --> (NH4)2SO4
October 14, 2008 by Kelly

Chemistry
how many kilograms of NH3 are needed to produce 2.90x10^5kg of (NH4)2SO4? the balanced equation is: 2 NH3 + H2SO4 --> (NH4)2SO4
October 14, 2008 by Kelly

Chemistry
How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol)
March 2, 2014 by Sarah

chemistry
How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol)
March 3, 2014 by Scarlett

Physical science
What is the formula of magnesium sulfate and ammonia? My work:MgSO4 + 2NH4OH --> (NH4)2SO4 + Mg(OH)2 Correct/Balance the equation below. MgSO4 + NH4OH → (NH4)2SO4 + Mg(OH)2
December 15, 2014 by DFD

Chemistry
The conjugate acid in the reaction described in HCl(g) + NH3(aq) → NH4 +(aq) + Cl- (aq) is A. HCl(g). B. NH3(aq). C. NH4+ (aq). D. Cl-(aq). I think its B or C?
June 3, 2014 by Angela

chemistry
Explain each of the following observations in terms of the electronic strucutre and/ or bonding of the compunds involved. (a)At ordinary conditions, HF( normal boiling point=20C) is a liquid, whereas HCl(normal boiling point=-114C) is a gas. (b)Molecules of AsF3 are polar, ...
January 29, 2008 by anonymous

I am having real trouble remembering how you can tell if a molecule is polar? Which of the following molecules is polar? NCl3, NO2, H2S, or SiH4
February 17, 2011 by Vova

Chemistry
How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol) phases? I2+I^- --> I3^-
March 9, 2014 by Valamir

Chemistry
4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is used. Since the oxalate is in excess , Calculate the theoretical yield of the iron complex FeSO4•NH4)2SO4•6H2O + H2C2O4•2H20 --> FeC2O4 + (NH4)2SO4 + H2SO4 + 8H2O 6FeC2O4 + 3H2O2 + 6K2C2O4•H2O --> 4K3[Fe(...
November 15, 2010 by Kesha

Chem
4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is used. Since the oxalate is in excess , Calculate the theoretical yield of the iron complex. FeSO4•NH4)2SO4•6H2O + H2C2O4•2H20 --> FeC2O4 + (NH4)2SO4 + H2SO4 + 8H2O 6FeC2O4 + 3H2O2 + 6K2C2O4•H2O --> 4K3[Fe(...
November 24, 2010 by Pat

Chemistry
Hey can you please check my answers? Also, Can you explain interparticle force of attraction? I'm not sure about the difference between IMFOA and IPFOA. Chemical formula: Cl2 Name: Chlorine Bond Type (intermolecular FOA): London VSEPR molecular shape: tetrahedral Central Atom ...
December 7, 2015 by Anonymous

Please check. Thank you. 2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O72– B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced ...
March 22, 2013 by Jack

Mathematics
Express the Complex Number -1-i in polar form. how is complex no expressed in polar form? what is polar form of complex no? Please help
March 3, 2014 by Sykox

Chemistry
How do I make NH3 to NH4? How would write an ionic equation? Can you show me how to do it? Thank you so much! NH3 + CuSO4 -> NH3 adds a hydrogen ion (from HCl or another source of H^+) to become NH4^+. There is no such animal as NH4 as a neutral material. For the equation, ...
October 22, 2006 by Kelly

2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O7^2– + NH4^+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– B.) Cr2O7^2– -> Cr2O3 C.) NH4^+ -> N2 D.) N2 -> NH4^+ I think it is B...? 3. Which oxidation-reduction reactions are best balanced ...
March 22, 2013 by cassie

Chemistry (Check and Help)
Hey can you please check my answers? Also, Can you explain interparticle force of attraction? I'm not sure about the difference between IMFOA and IPFOA. Chemical formula: Cl2 Name: Chlorine Bond Type (intermolecular FOA): London VSEPR molecular shape: tetrahedral Central Atom ...
December 6, 2015 by Anonymous

Chem
Calculate the [NH4+] in solution that is 0.25 M NH3 and 0.20 M NaOH. (Kb for NH3 = 1.8 x 10-5) I set up ICE from the equation: NH3 + H20 ------NH4 + OH- I 0.25 0 0 C -x +x +x E 0.25-x x x 1.8 *10^-5 = x*x/ 0.25-x 4.5* 10^-6 = x2 took the square root to get: 2.12 * 10^-3 =x but...
April 6, 2010 by AMI

1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos
February 26, 2013 by Beccaboo

Pre-calculus HELP PLASE !
1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos
February 26, 2013 by Beccaboo

Chemistry
I am really confused about polar and non polar molecules. I really don't understand how to know if something is polar or not. Or about bond polarity vs. molecular polarity (net dipole moment). Also, if it has a lone pair when you draw a lewis structure does this automatically ...
April 27, 2007 by Gabriela

pre-calculus
convert the numbers to polar form and then divide.leave the answer in polar form. 10-10i/3root3+3i
December 3, 2008 by javed

Chemistry
Given these pairs of atoms, indicate whether the following bonds are polar or non-polar covalent bonds. C-H N-H O-H C-C
March 7, 2013 by qwerty

Biology
List down 20 acids with their property and identify them by saying polar or non polar and acidic charge or basic charge
January 5, 2016 by Jerry

Chemistry
Write the equation for the dissolution of (NH4)2S04 in water. How many moles of each type of ion, and how many total moles of ions does the dissolution of 0.5 mol of (NH4)2S04 produce? help pleaseeeeee ASAP
April 6, 2011 by Kelly

Chemistry
Given Zn(NO3)2 + (NH4)2S = ZnS + 2NH4NO3 (molar mass of Zn(NO3)2 189 g, molar mass of (NH4)2S 68 g), what is the molarity of a 250 ml solution if you have 123 g of zinc nitrate?
March 20, 2013 by Stephen

precalculus
convert the equation y^2 = 2x -x^2 into polar form. convert the equation r = 2tan(theta) into rectangular form. I'm not really sure what either of these mean. I vaguely understand polar coordinates, but I'm not sure how to convert equations back and forth between polar and ...
December 6, 2009 by Annie

Trig
Find three additional polar representation of the point (-3, pie over 6) given in polar coordinates,using -2 pie <0 <2pie.
May 20, 2010 by Sasha

Polar Equations
Identify each polar equation by changing the equation to rectangular coordinates. Let t = theta (1) t = -pi/4 (2) r(sin(t)) = -2
February 23, 2008 by sharkman

chemistry
Explain whether C2H3Cl is polar or non-polar and why? Explain how electronegativity is applied to the answer.
March 29, 2010 by John

Chemistry
Which is more soluble in water? Briefly explain why. Acetic Acid: CH3CO(OH) OR Ethanol : CH3CH2OH I think its acetic acid because when observing its structure it is more polar than ethanol. And when using the like dissolves like rule, a more polar molecule with dissolve in ...
September 2, 2015 by Mia

chemistry
For the balanced equation shown below,how many moles of (NH4)2Cr2O7 reacted, if 0.8353 moles of Cr2O3 are produced? (NH4)2Cr2O7 --> N2+4H2O+Cr2O3
December 15, 2011 by SUPAMAN

chemistry
In the reversible reaction in water solution NH3 + H2O <---> NH4+ + OH− , what acts as a Bronsted-Lowry acid and what acts as a Bronsted-Lowry base? 1. H2O; NH4+ 2. H2O; OH− 3. OH−; NH4+ 4. NH3; H2O 5. OH−; H2O

Chem
2NH3 <--> NH4+ + NH2- In liquid ammonia the reaction represented above occurs. In the reaction, what does the NH4+ act as? A catalyst? And acid & a base? the conjugate acid of NH3? The reducing agent? The oxidizing agent?
April 22, 2008 by Trevor

Chemistry
Is lead non-polar covalent, polar covalent, ionic, network, or metallic and why?
November 30, 2012 by KnowsNothing

Chemistry
Is carbon phosphate an ionic, polar covalent, or non polar covalent bond?
December 5, 2013 by Destiny

Pre-calculus- URGENT
Convert the rectangular coordinate (-8,i (square root of 3) into polar coordinates. How do I do this?? I tried every way I knew of to convert the y coordinate (i (square root of three)) to polar form, but it didn't work. I think that the polar form of the x coordinate is ...
September 13, 2015 by Ellie

Polar equations - Help?
i need to graph the polar equation 2 = r cos (theta + 180) on one of the graphs that looks like a flattened globe. So far I have 2=r cos180 costheta + r sin180 sintheta what do i do now?
April 20, 2012 by Tabby

Chemistry
Ammonium carbonate decomposes upon heating according to the balanced equation: (NH4)2CO3(s) -> 2NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 27.0 degrees C and 2.03 atm from the reaction of 1.4kg of (NH4)2CO3. What is the pressure of each of the gases ...
December 3, 2015 by Stephanie

Math
An adult polar bear walks at an average rate of 5 kilometers per hour. 1. write an equation to find k, the number of kilometers a polar bear bear can walk in h hours. 2.make a table to show the relationship between the number of kilometers k a polar bear can walk and the ...
February 21, 2015 by Angelina

Chem
Calculate the concentration in mol per litre of ammonium ions in a solution solution prepared by mixing 360.0mL of 0.250 mol per litre ammonium sulphate solution with 675.0mL of 1.20mol per litre ammonium nitrate solution. Assume solution volumes are additive. I got 0.870 mol ...
January 27, 2007 by atriletz

Honors Chemistry
Can someone check my work please? Thanks :)) 2. Write the formulas for the compounds formed between the following: g. Cu+2 and NO3- (the +2 and - are superscripts, while the 3 is a subscript) ===> I got Cu(NO3)2. h. NH4 and SO4(2-) (the two 4's are subscripts, and the (2-) ...
October 13, 2009 by Emily

Chemistry
1. Water is a polar molecule. Therefore, it acts as a polar sollvent. a) Think about the following compounds: iodine, cobalt (II) chloride and sucrose (C12H22O11). Which compounds are soluble in water. b) Assume that the interaction between solutes and solvents that you ...
November 6, 2007 by Marty

Science
I got the following question wrong on a test "If a substance does not dissolve in water, but dissolves in oil, it is most likely a. polar b. homogeneous c. non-polar d. colloid" (I said A) Now that finals are coming up, I want to know what the answer is to this. Thanks for ...
June 9, 2009 by Lyss

Chemistry
1. what type of covalent bonded liquid will a polar covalent solid dissolve in? (hint like dissolves like) 2. what type of covalent bonded liquid will a non polar covalent solid dissolve in? (hint like dissolves like) 3. In what type of solvent will a polar solute dissolve? In...
November 12, 2014 by Theresa

Chem
How do you determine if a bond is non-polar covalent or polar covalent or ionic?
January 28, 2010 by Sam

Organic chemistry
A diels-Alder reaction of cyclopentadiene with Maleic Anhydride experiment was conducted in lab. But I was wondering why we added ligroin to the maleic anhydride and ethyl acetate. I know ligroin can be used as a solvent and it is also nonpolar, though ethyl acetate is also a ...
February 6, 2013 by James

Chemistry
How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol) phases? I2+I^- --> I3^- All are aqueous solutions
March 12, 2014 by Valamir

chem
1. under what circumstances is the molecular geometry around a single central atom the same as the electron group geometry around the central atom? 2.If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded to the central atom ...
April 28, 2008 by natash

Chemistry - molecular polarity
Hi Dr. Bob. Could you please take a look at the question below and my work? I'm not sure how to get the correct answer for this question. I would greatly appreciate your help! How many of the following molecules are polar? BrCl3 CS2 SiF4 SO3 A) 1 B) 2 C) 3 D) 4 E) 0 The ...
April 18, 2013 by Constantine

Chemistry- Dr.Bob222
Ammonium hydroxide is commonly advertised as an ingredient in some window cleaners. Rank the following in order of decreasing concentrations in these solutions: NH4OH, NH4+, OH-, NH3. Explain your reasoning. (Note that kb for ammonia = 1.8 x 10^-5. So does an unionized ion ...
April 3, 2016 by Nevaeh

Chemistry
For following problems 1 to 5, classify the bonds as: a) non-polar covalent b) polar covalent c) ionic d) metallic e) super covalent 1.) O-Cl 2.) Li-Br 3.) N-N 4.) N-H 5.) C-S
December 6, 2010 by Jay

chemistry- solubility
hydrocarbons nhexane, cyclohexane, and toluene are are insoluable in H2O (i assume because the hydrocarbons are non polar and water is polar) but why are these three hydrocarbons soluable in CH2Cl2?
February 20, 2012 by john

for the following reactions label each species as an acid or a base. Indicate the species that are conjugate acids and conjugate bases. A. HSO4-(acid) + NH3(base)<--> SO4^2-(conj base) + NH4+ (conj acid) B. HPO4^2- (conj base)+ NH4+ (conj acid) <--> H2PO4-(acid) + ...
April 25, 2010 by Anna

CHEM
Why is iodine a different colour in different solutions? Iodine in water is a dirty brown ikky color due to the polar water molecules' attraction for the iodine atoms since they are polar, too, due to instantaneous dipole-induced dipole attractions. In hexane, however, iodine ...
February 27, 2007 by Jon

Chemistry
My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the concentration of I^-1 when I...
October 4, 2014 by Louise

Chemistry
My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the concentration of I^-1 when I...
October 4, 2014 by Louise

Chemistry
My prelab is telling me to find the initial concentrations of I(^-) and S208(^2-) given the following reaction: 25 mL of 0.2 M KI + 48.00 mL 0.2 M KNO3 + 1 mL 0.4 M Na2S2O3 + 1 mL starch + 25 mL 0.2 M (NH4)2S2O8 + 1 drop EDTA How do I calculate the concentration of I^-1 when I...
October 4, 2014 by Louise

chemistry-Buffer Q
You have a solution of .5 L of 1.74g of NH3 and 4.15g of (NH4)2SO4. How many ml of 14M HCl is required for a pH of 9.00? I don't know how to go finish this one. I thought about figuring the concentrations of each (NH3, NH4), making an ice table and solving for the additino of ...
November 14, 2011 by matt

chemistry
How do intermolecular forces determine the vapor pressure of a liquid? A. A nonpolar compound has a low vapor pressure because of London dispersion forces. B. A compound that can form hydrogen bonds has a low vapor pressure. C. A polar compound has a high vapor pressure ...
March 18, 2015 by Cortney

Chem I
Calculate the pH of two buffer systems to compare the differences in pH. One contains 1.0 M NH3 and 3.0 M NH4Cl. (Ka of NH4+, is 5.6x10^-10). The other contains 1.0 M NH3 and 5.0 M NH4Cl. (Ka of NH4+, is 5.6x10^-10).
November 15, 2010 by Natalea

Chemistry
B. Could non-polar nitrogen molecules and polar water molecules form bonds with one another? if so, what kind? C. Given your answer to B above, do you think that there is a great deal of N2 dissolved in the oceans, a small amount, or none at all?
September 15, 2014 by Sierra

chemistry
the question reads: a) balance the equation: H3PO4 + Ca(OH)2 --> Ca3(PO4)2 + H2O b)what mass of each product results if 750 mL of 6.00 M H3PO4 reacts according to the equation? i balanced it with: 2H3PO4 + 3Ca(OH)2 --> Ca3(PO4)2 + 6H2O but i'm not sure where to go from ...
February 28, 2008 by Anonymous

Calculus (polar coordinates)
Use polar coordinates to set up the double integral x dA, where the bounds are given by the region lying in the intersection of the 2 circles r = 2 sin (theta) and r = 2 cos theta. Thanks for any help!
February 6, 2016 by Lucie

Chemistry
Hi. Is PO4(3-) polar or non-polar? Why or why not? Thanks! Look up the electronegativity of P and O. I think I remember that O is about 3.5 and P is about 2.1; therefore, each P-O bond is somewhat polar. Thus, the ion will be polar unless the Lewis structure (electron dot ...
November 23, 2006 by Sally

chem org
dipole-dipole means? and diff between non polar and polar? is it really part of organic chem?
June 28, 2015 by jaydee