Monday

October 20, 2014

October 20, 2014

Number of results: 93,836

**physics PLEASE helpp **

Find the net change in entropy when 213 g of water at 0.0C is added to 213 g of water at 96.9C.
*January 6, 2012 by melisa*

**physics**

Find the net change in entropy when 213 g of water at 0.0C is added to 213 g of water at 96.9C.
*January 6, 2012 by melisa*

**physics**

Find the net change in entropy when 213 g of water at 0.0C is added to 213 g of water at 96.9C.
*January 7, 2012 by melisa*

**Math**

I need to understand how to do the problem and not the answer. P.S. bobpursley, no offense but I didn't understand what your response meant. That information I already know but I need to know how to do the problem to get 213 as the answer. Anida won the class election by ...
*May 24, 2009 by Ninja*

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...
*February 22, 2012 by Justin*

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...
*February 22, 2012 by Justin*

**math**

what is 27.4 213.321 39.38
*May 23, 2009 by ice*

**Math 213**

how to compute 10 - 3 -12
*February 10, 2014 by rabia*

**mathematics**

A retail jeweler sells a pair of gold earrings for $213.90. The jeweler uses a 130% markup based on cost. Based on this information, what was the wholesale cost of the earrings? A. $93.00 C. $276.90 B. $164.53 D. $278.07 213.90 divided by 130%=164.53 B
*May 14, 2009 by Emma*

**math**

simplify 144+(-317)+213 =?
*December 9, 2011 by Anonymous*

**Math**

Aaron has two types do iodine in his lab. He has brand 213 iodine, which costs 36 cents per ounce. He also has brand 856 iodine, which costs 1.58$ per ounce. How many ounces of brand 213 should be used if he has 63 ounces of brand 856 and wants to make a mixture that costs ...
*October 10, 2013 by Elizabeth*

**Statistics**

The mean and median sales prices of new homes sold in the U.S. in November 2010 were $213,000 and $268,000. Which of these numbers is the mean and which is the median? Explain how you know. I'm assuming the median is $213,000 and the mean is $268,000. However, I'm just ...
*May 22, 2013 by Anonymous*

**MTH 213-Elementary Math**

Let U = {u, n, i, t, e} A = {n, i, t} B = {n, e} C = {u, n, i, t, e} D = {u, e} Find each of the following:
*November 30, 2009 by Ta*

**math :D**

which of the following is closest in value to .213 f-1/2 g-1/3 h-1/4 j-1/5 k-1/6 answer:j-1/5
*September 1, 2010 by anonymous1*

**math**

144+(-317)+213 i think the answer is 40
*February 5, 2011 by :P smile*

**Math 213 Elementary Math**

Use the definition of less than to show each of the following: a. 2 < 4 b. 3 < 100 c. 0 < 3
*August 5, 2009 by Shay*

**Physics**

Jack rides his 213kg motor cross bike 25.3m up a 30.0 degree slope at a constant speed. what is the energy his bike expends if the frictional force opposing its movement is one-tenth its weight? Are you sure the mass is 213 kg? Shouldn't it be 21.3 kg? Or does that include ...
*August 3, 2007 by Jarin*

**chemistry**

Calculate the change in entropy (ΔS˚) of reaction (J/K) for the equation as written. BaCO3(s) → BaO(s) + CO2(g) Table: S (J/(K mol)) BaCO3(s) = 112 BaO(s) = 70.3 CO2(g) = 213.7 So the answer is -41.7 I thought to find the entropy of reaction you subract the ...
*February 23, 2013 by Carter*

**Math 213 Elementary Math**

List all the subsets of {2, o, t}.
*August 4, 2009 by Shay*

**Math 213 Elementary Math**

1. List all the subsets of {2, o, t}.
*August 5, 2009 by Shay*

**math 213**

Tell whether each of the following is true for all sets A, B If false, give a counterexample. A
*August 18, 2012 by susan*

**math 213**

The following sets of ordered pairs are functions. Give a rule that could describe each function. A.{(5,3),(7,5),(11,9),(14,12)} B. {(2,5),(3,10),(14,7),(5,26)}
*August 18, 2012 by susan*

**Math 213**

Please....! There are two questions here. What, if anything, is wrong with the following numerals? A. 306four B. 1023two
*January 20, 2011 by Jonathan*

**Math**

102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219
*January 24, 2011 by Jay*

**math 213**

Determine all possible digits to fill in the blanks to make each of the following true. 9 |482____ 6|24____35 4 |63____
*December 5, 2009 by alicia*

**CHEMISTRY**

During an experiment, a student adds 1.23 g of CaO to 200.0 mL of 0.500 M HCl. The student observes a temperature increase of 5.10 C. Assuming the solution\'s final volume is 200.0 mL, the density if 1.00 g/mL, and the heat capacity is 4.184 J/(gC), calculate the heat of ...
*June 26, 2013 by imstupid*

**Math 213**

Examine several newspapers and magazines and describe at least three examples of functions that appear. What is the domain and range of each function?
*April 13, 2010 by dan*

**math**

102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219 is not +3+6+3+6 TRY it yourself
*January 24, 2011 by Jay*

**math**

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219
*January 24, 2011 by Jay*

**math**

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219
*January 24, 2011 by Jay*

**Math**

The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S
*June 24, 2013 by Nick*

**math**

Round each number to the place value indicated by the digit in bold. a. 3587 the 5 b. 148,213 the 1, in 148 c. 23,785 the 3 d. 2,357 the 5
*August 19, 2012 by Rachel*

**Math-algebra-Steve**

The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S?
*June 24, 2013 by Nick*

**mth/213**

Let U = {u, n, i, t, e} A = {n, i, t} B = {n, e} C = {u, n, i, t, e} D = {u, e} Find each of the following: (a) A B
*November 1, 2009 by marina*

**Chemistry**

how many grams of oxygen are in 213.5g Fe2O3?
*January 17, 2011 by Felipe*

**Math**

Es time the answer below. A). 3 10/11 +2 1/101 Chose 4 or 5 or 6 or 7 B) 5 2/47 - 2 1/35. Chose 2 or 3 or 4 or 5 C) 6 17/18 * 7 3/290. Chose 42or 49 or 63or 213
*November 25, 2013 by Pietro*

**math**

Round 0.681 to the nearest tenth. question 2: Estimate 17.64+9.213 by first rounding each number to the nearest tenth.
*May 3, 2012 by i need help please2*

**chemistry**

how many grams of sodium oxalate, Na2C2O4, could be obtained from 213 g of C6H6?
*February 10, 2014 by hkgdfjtrth*

**MATH 213**

13. Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.
*November 1, 2009 by brina*

**chemistry**

How many milliliters of 0.246 M HNO3 should be added to 213 mL of 0.00666M 2,2'-bipyridine to give a pH of 4.19?
*May 26, 2010 by amit*

**Math 213 Elementary Math**

2. Let U = {x x is a female} A = {x x is a mathematician} B = {x x owns a pickup} C = {x x owns a dog}
*August 5, 2009 by Shay*

**MTH 213-Elementary Math**

Write each of the following in the indicated base. (a) 1021 three to base ten. ________________________ (b) 534 ten to base twelve __________________________
*December 5, 2009 by Ta*

**College Math 213**

write each of the following in the indicated base. 1011two to base ten 1574 to base twelve MCMLIV to base ten
*December 6, 2009 by Debra*

**math **

please check my answers 1.Write each of the following as a common fraction or mixed number.4.0171=. 4 171/10,000 2.Arrange in order from smallest to largest.2.05,25/10 , 2.0513, 2.059,251/100 , 2.0515, 2.052, 2.051 3. 27.4 213.321 39.38 add=280.101 4.45.6 8.75subtract...
*September 16, 2009 by p*

**math**

Two congruent circles Γ1 and Γ2 each have radius 213, and the center of Γ1 lies on Γ2. Suppose Γ1 and Γ2 intersect at A and B. The line through A perpendicular to AB meets Γ1 and Γ2 again at C and D, respectively. Find the length of CD.
*June 11, 2013 by raja harishchandra*

**Math 213 Elementary Math**

20. Think of a number. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number. Explain how this trick works.
*August 7, 2009 by Shay*

**math**

At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis. $213.30 $21.23 $274.60 can't be done with these assumptions.
*July 24, 2008 by alisha*

**Chemistry **

Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) for 310K,1070,1470 this is...
*May 19, 2014 by Ty*

**math**

a retail jeweler sells a pair of gold earrings for $213.90. The jeweler uses a 130% markup based on cost. Based on this information what was the wholesale cost of the earrings?
*July 11, 2009 by shannon*

**math**

a retail jeweler sells a pair of gold earrings for $213.90. The jeweler uses a 130% markup based on cost. Based on this information, what was the wholesale cost of the earrings
*November 9, 2012 by Anonymous*

**Algebra**

A = - 113 and A = -213 20 40 this is an arithmetic sequence and i have to find the explicit formula and the recursive formula how do i do that?
*October 1, 2008 by Rebkea*

**math**

3 to the 5th power / 3 to the 2nd power= ?? 22 24 23 26 27 2100 213 (3^5) / (3^2) = 27 3 to the 5th power is 3 x 3 x 3 x 3 x 3. ________________________________________ 3 to the 2nd power is 3 x 3. Cancel two of the 3s on the top and the bottom. What do you have left? thanks ...
*August 21, 2007 by Rodger*

**Math**

Larry has an annual return of $213.00 from $3000.00 invested at simple interest. One at 5% and the other at 8%. How much is invested at each rate. (Hint, Interest earned = amount invested x rate of interest.)
*September 10, 2012 by Lyn*

**math 213**

The effect of depreciation can be computed using a formula similar to the formula for compound interest. a. Assume depreciation is the same each month. Write a problem involving depreciation and solve it. b. Develop a general formula for depreciation defining what each ...
*April 19, 2010 by billy bob*

**math 213**

Kahlil said that using the equation he can find a similar equation for Examine his argument. If it is correct, supply any missing steps or justifications; if it is incorrect, point out why. = a2 - 2ab + b2 = a2 + 2a1-b2 + 1-b22 1a - b22 = 3a + 1-b242 2ab + b2, 1a - b22. 1a + ...
*April 8, 2011 by christy*

**science**

The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid ox
*February 27, 2012 by ashley*

**math 213**

Tell whether each of the following is true for all sets A, B If false, give a counterexample. a. A-B= A-0 (with slashed O) b. AUB (with line over AUB) = AUB (with line over A and a line over B)
*August 18, 2012 by susan*

**MTH 213-Elementary Math**

(a) Illustrate a one-to-one correspondence between the following sets: N = {1, 2, 3, 4,. . . , n,. . .} F = {4, 9, 14, 19, 24,. . .} (b) In your correspondence, what element of F corresponds to 57? Explain why. (c) In your correspondence, what element of F corresponds to n?
*November 30, 2009 by Ta*

**math 213**

The amount of money in cents in a jar containing some nickels and d dimes and some quarters if there are 4 times as many nickels as dimes and twice as many quarters as nickels
*August 18, 2012 by susan*

**Chemistry**

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
*October 28, 2011 by Andres*

**Chemistry**

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
*October 28, 2011 by Andres*

**Chemistry**

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
*October 28, 2011 by Andres*

**math**

289 min = 4 hr and 49 min 213 min = 3 hr and 33 min 345 min = 5 hr and 45 min 197 min = 3 hr and 17 min I have to change these minutes on the left to hours and minutes. could you check if I have them correctly. Thank you for your help
*April 26, 2010 by st*

**math**

A rectangular room has an area of 120ft squared. Marge drew a scale drawing of the pool using the scale 1.5cm=2ft. What was the area of the scale drawing? a) 213.3cm2 b) 67.5cm2 c)53.3cm2 d)1.5cm2 I don't think any of the choices match the answer (90cm2)?
*April 2, 2013 by pitigoiu*

**4th grade**

Estimate the answers: a) 3 10/11 + 2 1/101 = Choose 4,5,6,or 7 b) 5 2/47 - 2 1/35 = Choose 2,3,4, or 5 c) 6 17/19 x 7 3/290 = Choose 42,49,63 or 213 I need to choose the best answer to this problems. Please help me with this. Thanks
*November 30, 2009 by Ili*

**Chemistry**

Consider the titration of 41.5 mL of 0.213 M HCl with 0.123 M KOH. Calculate the pH of the resulting solution after the following volumes of KOH have been added. (Assume that all solutions are at 25C.) (a) 0.0 mL (b) 10.0 mL (c) 40.0 mL (d) 80.0 mL (e) 100.0 mL
*March 13, 2013 by Margaret*

**math 213 #18**

A student claims that every prime greater than 3 is a term in the arithmetic sequence whose nth term is 6n + 1 or in the arithmetic sequence whose nth term is 6n 1. Is this true? If so why?
*April 13, 2010 by dan*

**MATH**

Construct both an ungrouped and a grouped frequency distribution for the data given below: 207 211 204 208 202 203 211 202 205 212 210 212 204 199 204 201 213 200 204 207
*November 11, 2011 by Jennifer*

**science**

The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized?
*September 7, 2010 by Brianna*

**Chemistry**

The density of liquid oxygen at its boiling point is 1.14 \rm{kg/L} , and its heat of vaporization is 213 \rm{kJ/kg} . How much energy in joules would be absorbed by 2.0L of liquid oxygen as it vaporized?
*September 15, 2012 by jazz boone*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Eds friends, Stacey, eats chocolate exclusively. How many different ...
*August 4, 2009 by Shay*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Eds friends, Stacey, eats chocolate exclusively. How many different ...
*August 4, 2009 by Shay*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Eds friends, Stacey, eats chocolate exclusively. How many different ...
*August 5, 2009 by Shay*

**Math 213 Elementary Math**

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Eds friends, Stacey, eats chocolate exclusively. How many different ...
*August 5, 2009 by Shay*

**chemistry**

hoose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate for dichloromethane (in ). () () 263 80.1 273 133.6 283 213.3 293 329.6 303 495.4 313 724.4
*January 20, 2010 by Mariah*

**PHYSICS**

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.
*October 21, 2010 by ZAC*

**physics**

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.
*October 21, 2010 by josh*

**physics**

An archer puts a 0.34 kg arrow to the bowstring. An average force of 213.1 N is exerted to draw the string back 1.48 m. The acceleration of gravity is 9.8 m/s 2 . Assuming no frictional loss, with what speed does the arrow leave the bow? Answer in units of m/s
*December 13, 2012 by Anonymous*

**chemistry**

Calculate the value of T delta S (KJ) of reaction for the equation as written. (It is given that the standard enthalpies (J/K mol)are CH3COOH=159.8, O2=205.138, CO2=213.7, H20=69.91) CH3COOH(l) + 2 O2(g) --> 2 CO2(g) + 2H2O(l)
*March 9, 2008 by Anonymous*

**math 2 questions need help**

At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis. $213.30 $21.23 $274.60 can't be done with these assumptions. After 20 years, 100 ...
*July 24, 2008 by alisha*

**ALGEBRA**

A car dealer will sell you a used car for $7,542 with $542 down and payments of $213.27 per month for 36 months. What is the APR? (Use the formula on page 156. Round each answer to the nearest tenth.)
*May 20, 2012 by Daniel*

**Math**

The weekly rental cost of a 20 foor recreational vehicle is $129.50 plus $0.15 per mile. -Find a linear function that express the cost C as a function miles driven m. - What is the rental cost if 860 miles are driven? -How many miles were driven if the rental cost is $213.80?
*March 7, 2010 by Rony*

**math**

18 Estimate 8128 /18 by first rounding each number so that it has only nonzero digit. 20. Find the digits in the tens place, in the tenths place, and in the ten thousandths place for the following number. 465.2587 21. Round 0.681 to the nearest tenth. 22. Estimate 17.64+9.213 ...
*May 2, 2012 by Faye *

**chem 140 A**

The density of liquid oxygen at its boiling point is 1.14 , and its heat of vaporization is 213 . How much energy in joules would be absorbed by 3.0 of liquid oxygen as it vaporized? Express your answer numerically in joules.
*May 27, 2010 by Kathy*

**chemistry**

A mixture consisting of 0.150 M N2(g) and 0.612 M H2(g) reacts and then reaches equilibrium according to the equation: N2(g) + 3H2(g) ⇋ 2NH3(g) At equilibrium, the concentration of ammonia is 0.213 M. Calculate the concentration (molarity) of H2(g) at equilibrium to 3 ...
*May 9, 2013 by Johnny*

**math 213**

This season the basketball team has won 8 games and lost 4. (a) What is the basketball teams ratio of wins to loses? (b) What is the basketball teams ratio of wins to games played? (c) If the basketball team continues to win at this rate, how many of the remaining 3 game can...
*April 22, 2010 by sam*

**Chemistry**

Calculate the entropy of formation (J/K mol) of CS2(l). The value of T delta S^0 for the equation as written is -16.7774 KJ/mol. (the given standard entropies are: O2= 205.138, CO2= 213.7, SO2= 248.22) CS2(l) + 3 O2(g) --> CO2(g) + 2 O2(g)
*March 10, 2008 by Anonymous*

**physics**

A 33.5 kg block m1 is on a horizontal surface, connected to a 6.50 kg block m2 by a massless string. The pulley is massless and frictionless. A force of 213.7 N acts on m1 at an angle of 33.7o. The coefficient of kinetic friction between m1 and the surface is 0.201. Determine...
*July 18, 2013 by Mary*

**Math**

Using the following cash flows for projects A and B, use payback period, discounted payback period, NPV, IRR, and MIRR to see if these are good projects or not. > Project A: (283,000); 46,000; 89,000; 104,000; 123,000; 187,000; and 72,000 > Project B: (318,000); 72,000; ...
*September 27, 2014 by James*

**chemistry**

The reaction between solid sodium and iron(III) oxide is one in a series of reactions that inflates an automobile airbag. 6 Na(s) + Fe2O3(s) 3 Na2O(s) + 2 Fe(s) If 171.0 g Na and 213.5 g Fe2O3 are used in this reaction, what is the mass of excess reactant that remains after ...
*February 7, 2010 by tg*

**Chemistry**

The reaction between solid sodium and iron(III) oxide is one in a series of reactions that inflates an automobile airbag. 6 Na(s) + Fe2O3(s) 3 Na2O(s) + 2 Fe(s) If 171.0 g Na and 213.5 g Fe2O3 are used in this reaction, what is the mass of excess reactant that remains after ...
*February 9, 2010 by tdb*

**Chemistry**

If you dilute 12.5 mL of a 3.5 M solution to make 213.8 mL of solution, what is the molarity of the dilute solution?
*March 27, 2013 by Dylan*

**Physics**

When a 0.213-kg mass is attached to a vertical spring, it causes the spring to stretch a distance d. If the mass is now displaced slightly from equilibrium, it is found to make 150 oscillations in 52.0 s. Find the stretch distance, d.
*November 17, 2011 by Cooper*

**Math**

The cost of 5 similar digital cameras and 3 similar video cameras is $3,213. each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he pay?
*October 27, 2013 by Don't know*

**algebra**

Please help, I am confused with this problem. My problem is: Beaver Stadium has a capacity of 1081 more than Michigan Stadium. If the combined capacity for the two stadiums is 213,483, find the capacity of each stadium?
*September 11, 2013 by Nima*

**chemistry**

Combustion analysis of 0.213 g of a compound containing C, H, and O produces 0.468 g of CO2 and 0.255 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula:(-------) Molecular Formula:(--------)
*April 3, 2010 by sam*

**AP Chemistry**

The equilibrium constant for thermal dissociation of F2 F2(g)<->2F(g) is 0.300. If initially 1.00 mol F2 is placed in a 1.00 L container, which of the following is the correct number of moles of F2 that have dissociated at equilibrium? 1. 0.130 mol 2. 0.418 mol 3. 0.548 ...
*November 26, 2013 by Gabriella*

**physics**

A 2.000-kg particle rests on a frictionless horizontal surface and is attached to the free end of a spring. The particle is pulled horizontally so that it stretches the spring 0.05 m and is then released from rest at t = 0. Determine the displacement, x, of the particle from ...
*May 5, 2010 by lucas*

**chemistry**

the number of molecules in 6.843*10^-2 kg of Al(NO3)3 is: and this is what i have done so far... 1st i converted the kg to g which is 6.843*10^-5. then i figured out the moles:6.843*10^-5/213.01 i got 3.21*10^-7. i then multiplied this number by avogadro's number(6.022*10^23) ...
*March 5, 2008 by tina*

**chem**

how many milliter of .246 M HNO3 should be added to 213 ml of 0.00666 M 2,2'-bipyridine to give a pH of 4.19? please help, does this problem need to be solved with ka or kb?. Is 2,2'- bipyridine a base, this is the problem from my text book, but it is not given by the formula...
*February 2, 2010 by bun*

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