Friday

August 1, 2014

August 1, 2014

Number of results: 65,968

**Chemistry**

Please Help me with my chemistry Review I have a test tommorow? Please help me with my review my test average is low and i need at least a b to pass the class for the six weeks I am freaking out!!!! I care more about showing work i dont want answers I just want help on how to ...
*February 28, 2008 by anon*

**Chemistry**

In a titration HCl and NaOH have a 1:1 ratio. Can you still use the formula M1V1 = M2V2 to find the molarity of the NaOH base if we change the acid to sulfuric H2SO4?
*March 4, 2010 by Jimmy*

**chemistry**

If the end point in the titration of oxalic acid with NaOH solution is super-passed (too pink), will the molar concentration of NaOH be hiegher or lower than the actual value ? Explain ..
*April 2, 2011 by Huda*

**Chemistry**

HC8H4O4K + NaOH = H2O + H4C8O4KNa I'm given the volume of NaOH in mL (ex: 9.11 mL), and I have to convert it to moles. How can I do that conversion? Please help by explaining if you can, I've had trouble with this problem for the whole week..
*October 7, 2012 by Karen*

**Physics(Please just check, thanks)**

Using a force table the direction and magnitude had to be found for the following measurements: F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees The magnitude and direction found was 280 grams at 257 degrees. Using the magnitude and direction of F1 and F2 I need to ...
*September 24, 2012 by Hannah*

**Chemistry**

PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak base and the molecular weight is 157.67 g/mol. I found the solution, it is 6.67 milliliters. Part B: "The buffer from Part A is diluted to 1.00 L. To ...
*April 24, 2009 by Linda*

**Momentum Problem**

A cart of mass m1 = 15 kg slides down a frictionless ramp and is made to collide with a second cart of mass m2 = 23 kg which then heads into a vertical loop of radius 0.21 m. (a) Determine the height h at which cart #1 would need to start from to make sure that cart #2 ...
*November 3, 2010 by Jessica*

**Math**

A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 ferces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when its point of contact...
*April 27, 2013 by Tasneem*

**Math**

A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 forces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when its point of contact...
*April 27, 2013 by Tasneem*

**Calculus**

The base of a solid is the region enclosed by the graph of x^2 + 4y^2 = 4 and cross-sections perpendicular to the x-axis are squares. Find the volume of this solid. a. 8/3 b. 8 pi/3 c. 16/3 d. 32/3 e. 32 pi/3 Thanks in advance! :)
*April 6, 2008 by Jillian*

**calculus**

Consider the solid obtained by rotating the region bounded by the given curves about the line x = 6. y = sqrt(x), y = x Find the volume V of this solid.
*January 31, 2009 by bob*

**Math and Science**

A rectangular solid with the dimension 1m x 1m x 3m is divided into three equal cubes. How much is the surface area of this solid increased?
*March 25, 2009 by Twilight lover*

**Chemistry**

If 0.110 mol of liquid H2O and 40.5 g of solid Al2S3 are reacted stoichiometrically according to the balanced equation, how many moles of solid Al(OH)3 are produced?
*May 21, 2009 by Julie*

**calculus**

Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y=6x^5, y=6x, x>or equal to 0 Find the volume V of this solid.
*February 2, 2010 by Albert*

**Calculus II**

Consider the solid obtained by rotating the region bounded by the given curves about the y-axis. y = ln x, y = 4, y = 5, x = 0 Find the volume V of this solid. Help!!! Thank you in advance :(
*March 8, 2011 by Sarah*

**math**

54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain
*May 26, 2014 by thomas*

**Astronomy**

The latent heat of melting is the amount of energy needed to convert a solid substance at its melting temper- ature to a liquid at the same temperature. For typical volcanic rocks, the latent heat of melting is around 5×105 J/kg, which means it takes 5×105 J to turn 1 kg of ...
*April 9, 2009 by Ashley*

**Chemistry (Stoichiometry)**

Heres a balanced equation: Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains 34 grams of AgNO3. Calculate the grams of solid product, Ag2CO3. Part 2: 10 mL of Na2CO3 in this experiment contains 21 grams of Na2CO3. ...
*February 6, 2013 by Jennifer*

**physics**

calculate the momentum of an object if: a. its mass is 4kg and its velocity is 8m/s b. its mass is 500g and its velocity is 3m/s c. a force of 20N is applied to it for 6s and it moves from rest D. its mass is 2kg and it falls from rest for 10s (assume g = 10ms-2 or 10Nkg-1)
*February 15, 2013 by Leann*

**Chemistry**

Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide. Li3N(s) + 3H2O(l) ==> NH3(g) + 3LiOH(aq) a)What mass of water is needed to react with 32.9g Li3N? b)When the above reaction takes place, how many molecules of NH3 are produced? c)Calculate the ...
*April 5, 2010 by Kim*

**Economics**

The marginal tax rate is defined as the extra taxes paid on additional income divided by the increase in income. Calculate the marginal tax rate for the proportional tax system as income rises from $50,000 to $100,000. Calculate the marginal tax rate as income rises from $100,...
*November 13, 2006 by Sally*

**Math 117**

1.) A rectangular solid and a circular cylinder have the same volume and the same height. The base of the rectangular solid is a square. Which (if any) of the following statements are true? (i) The rectangular solid and the cylinder have the same base area. (ii) The ...
*August 20, 2009 by Zack*

**Chemistry**

When a diprotic acid, H2A, is titrated by NaOH, the protons on the diprotic acid are generally removed one at a time, resulting in a pH curve that has the following generic shape. (a) Notice that the plot has essentially two titration curves. If the first equivalence point ...
*March 7, 2013 by Franklin*

**Chemistry**

We conducted a lab with antacids in class the other day and i'm having trouble doing the calculations. Well we basically took antacid tablets dissolved them in HCl, heated it and then added phenolthalien and then titrated until we saw a pink color. At 41mL we saw the pink and ...
*March 15, 2010 by Anonymous*

**chemistry**

a. A 0.1 molal solution of a weak monoprotic acid was found to depress the freezing point of water 0.1930C. Determine the Ka of the acid. You can assume 0.1 molal and 0.1 molar are equivalent. b. 100 ml of a 0.1M solution of the above acid is titrated with 0.1 M NaOH. After an...
*February 12, 2012 by billy*

**chemistry**

a 5.55g sample of a weak acid with ka=1.3*10^-4 was combined with 5.00ml of 6.00 M NAOH and the resulting solution was diluted to 750mL. The measured pH of the solution was 4.25. what is the molor mass of the weak acid. if used the formula pH=kpa+log(base/acid) Ph=3.89+log(6....
*November 25, 2010 by help*

**chemistry**

a 5.55g sample of a weak acid with ka=1.3*10^-4 was combined with 5.00ml of 6.00 M NAOH and the resulting solution was diluted to 750mL. The measured pH of the solution was 4.25. what is the molor mass of the weak acid. if used the formula pH=kpa+log(base/acid) Ph=3.89+log(6....
*November 25, 2010 by help*

**Chemistry**

What is the molarity of a solution prepared by dissolving 5.86 grams of naoh in enough water to make 250 milliliters of solution
*May 9, 2013 by Talia flores*

**Chemistry help**

2.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
*July 29, 2013 by Anonymous*

**physics**

A m = 2.51 kg mass starts from rest and slides a distance d down a frictionless theta = 34.6° incline. While sliding, it comes into contact with an unstressed spring of negligible mass. The mass slides an additional 0.220 m as it is brought momentarily to rest by compression ...
*October 31, 2009 by Anonymous*

**physic**

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 4.5000 kg when weighed in air.
*August 8, 2010 by Ash *

**Physics **

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 1.6000kg when weighed in air.
*November 10, 2012 by Melissa *

**chemistry**

A buffer solution contains 0.200 M NH3 and 0.250 M NH4Cl. What is the pH of the buffer solution after the addition of 10.0 mL of 0.100 M NaOH to 50.0 mL of the buffer? Kb for NH3 is 1.8 x 10-5.
*October 26, 2010 by Brett*

**Chemistry**

25.0 ml of a 0.100 M solution of the weak acid, CH3OOH is titrated with a 0.10 M solution of the strong base, NaOH. Calculate the pH of the equivalence point.
*February 26, 2012 by ASood*

**Physics**

How do you calculate the energy needed to heat 4 kg of water from 25oC to 45oC?
*November 5, 2010 by Angel*

**chemistry**

Calculate the volume needed to dissolve 11.2g CuSO4 to prepare 0.140M?
*March 9, 2011 by cris*

**chem school**

calculate the volume of 2.04 m al l oh 3 needed to neutralize 22.0 ml of 880m h2so4
*June 24, 2014 by Ali*

**chemistry**

What mass of water must be added to 0.5 mol of glucose to make a solution of 25 percent by mass?The molar mass of glucose is 180 g/mol.
*January 22, 2012 by student*

**Science**

Given: Concentration of acetic acid 0.1M and 30mL used. Concentration of hydrocholoric acid 0.1M and 15mL used. Concentration of sodium hydroxide 0.1M and 5mL used. I need to calculate the pH before any NaOH is added and after the NaOH is added. I think i am suppose to use the...
*April 1, 2009 by Sunshine*

**physics**

A mass m = 88.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 15.8 m and finally a flat straight section at the same height as the center of the loop (15.8 m off the ground). Since the mass would not make it around the loop if ...
*February 12, 2013 by peter*

**chem**

The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. 1. Compute the experimental percent by mass of copper in the sample: 1.1664/1.998x 100=71.81% 2. Calculate the percent copper in pure copper sulfate pentahydrate(this is the ...
*April 13, 2009 by Lou*

**got a couple of calculus questions**

1. What is the equation of the tangent line to y = 2*x(x - 4)^6 at point (5, 10)? 2. If f(x)=8/(x^2+4) , find the slope of the curve at the point (2, 1). 3. The demand function for an item is given by x=200[1-(p/(p+2))] . At what rate is the demand changing when the price p is...
*July 9, 2006 by annie*

**Chemistry**

What is the chemical reaction between these chemicals? NH4Cl + Na2SO3 NH4Cl + NaOH Na2SO3 + BaCl2 Na2SO3 + NaOH H2SO4 + BaCl2 BaCl2 + NaOH
*April 25, 2014 by Axel*

**chemistry**

Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?
*September 16, 2013 by Junior*

**chemistry**

Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?
*September 16, 2013 by Junior*

**Chemistry**

a 20.0ml sample of HCL solution is placed in a flask with a few drops of indicator. If 30.0ml of a 0.240 M NaOH solution is needed to reach the endpoint, what is the molarity of the HCL solution?
*April 15, 2013 by Ashleigh*

**Chemistry**

Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. (a) 100.0 mL of 0.14 M HC7H5O2 (Ka= 6.4 multiplied by 10-5) titrated by 0.14 M NaOH halfway point equivalence point (b) 100.0 mL of 0.29 M C2H5NH2 (Kb = 5.6 multiplied by ...
*June 1, 2012 by Andrew*

**Chemistry**

What is the pH of the solution created by combining 11.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? Here is the chart that i am supposed fill out: mL NaOH pH w/ HCl pH w/ HC2H3O2 11.40 _________ ____________ Here's ...
*April 27, 2009 by Lisa*

**Algebra- word problem**

Jordan has a photograph on his wall that is 3 in. long and 6 in. wide. He takes it to be framed which increases the length and width by 2 in. each. How does getting the picture framed change the amount of wall space needed? My choice is B- Correct?? Choices A. the wall needed ...
*May 15, 2011 by Mary *

**chemistry**

Calculate the mass of salts needed for constructing a buffer using potassium monobasic phosphate and potassium dibasic phosphate with the total concentration of 100 mM. The solution is to be prepared in DI water and the pKa value for potassium monobasic phosphate is 7.21 and ...
*November 14, 2010 by dave*

**chemistry**

A 1.0 M acetic acid solution (CH3COOH, pKa = 4.7) is neutralized by dissolving NaOH(s) (a strong base) in the solution. Estimate the pH at the equivalence point of the neutralization process: 4.7 7.0 9.3 Which one of the following statements best explains your prediction? 1. ...
*March 31, 2014 by bekah*

**Science**

I need help filling this blank. The difference between a "cool" solid and a "hot" solid is that the particles vibrate __________ in the cool solid. Would "freely" fit the blank? The difference between a solid and a liquid at the same temperature is that the particles of the ...
*March 24, 2010 by Sara*

**JHU**

When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2
*November 30, 2012 by Anzeeel*

**Chemistry**

When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2
*December 1, 2012 by Anzeel*

**URGENT Physics PLEASE help**

5. A 1,600 kg car is moving south at 24 m/s. What is its momentum? (Points : 1) 66 kgm/s south 66 kgm/s north 38,000 kgm/s north 38,000 kgm/s south Question 6. 6. The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the impulse that acted on...
*January 27, 2014 by Anon*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*March 2, 2011 by karim*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*March 2, 2011 by karim*

**chemistry/ molarity, molality**

A solution is made by mixing 20.0 mL of C6H5CH3, d=.867g/mL, with 140.0mL of C6H6, d=.874g/mL. assuming that the volumes add upon mixing, what is the molarity? what is the molality? i know that molarity= moles/L and molality= moles sol/kg solvent... but im not sure which ...
*April 3, 2007 by christine*

**chemistry**

what mass of KCl can be dissolved in 200.0g of water at 15.0C?
*May 14, 2012 by valerier*

**Physics**

How do you calculate error analysis? For example; 200 +- 5% Please explain if possible
*June 13, 2010 by 3i*

**Chemistry**

If 12.50 grams of Pb(NO3)2 are reacted with 3.18 grams Nacl in a "typical double displacement" reaction, please calculate the following: a) What is the limiting reagent? b) what is the reagent in excess? c) Calculate the mass of the excess. d) Calculate the theoretical yield ...
*April 6, 2008 by Larissa*

**chemistry**

1. calculate the volume of concentrated HNO_3 (68%)that is needed to prepare stock solution 0.25M in 1000mL volumetric flask. (density HNO_3 = 1.513 g/cm^3) 2. from above stock solution, determine volume needed to dilute to 500mL volumetric flask that contained 10 times dilution.
*July 10, 2013 by khadijah*

**Chemistry**

1. calculate the volume of concentrated HNO3 (68%)that is needed to prepare stock solution 0.25M in 1000mL volumetric flask. (density HNO3 = 1.513 g/cm^3) 2. from above stock solution, determine volume needed to dilute to 500mL volumetric flask that contained 10 times dilution.
*July 10, 2013 by Susan*

**PHYSICS**

A 494 kg uniform solid sphere has a radius of 0.390 m. Find the magnitude of the gravitational force exerted by the sphere on a 49.1 g particle located (a) 1.45 m from the center of the sphere 1 ? N (b) at the surface of the sphere 2 ? N (c) 0.200 m from the center of the ...
*March 21, 2011 by Steve*

**11th grade-Calculas**

An animal will defend the region around its home by attacking intruders that come in to the region. According to the statistical studies reported in J.M. Emlen's Ecology: An Evolutionary Approach, the defended region's area varies directly with the 1.31 power of the animal's ...
*November 8, 2008 by Amy*

**Math**

I have a few basic physics problems. How do you calculate how long it will take for an object to hit the ground when it is dropped from a certain height? Specifically from 128 ft. Additionally how would you calculate how much velocity is needed to launch at item to a certain ...
*March 24, 2011 by Emily*

**Physics**

what is the moment of interia of a solid cylinder of radius R=0.0950m thickness t=0.015m total mass M=3.565kg? show your work
*October 13, 2011 by Arthur*

**Physics**

What is the rotational inertia of a solid iron disk of mass 45 kg, with a thickness of 3.44 cm and radius of 19.0 cm, about an axis through its center and perpendicular to it?
*November 13, 2011 by Anonymous*

**Calculus**

I don't understand how to answer this problem: The base of a solid is bounded by y=x+1 and y= x^2-1. Find the volume of the solid if the cross section is perpendicular to the x axis are equilateral triangles.
*April 17, 2011 by Alexandra*

**chemistry **

A white solid was found in an unmarked bag. Describe an experiment that can be set up to determine if the solid is either MgSO4*10H2O or KCL*2H2O
*March 4, 2013 by Rachel*

**chem**

calculate the pH in a solution prepared by dissolving .10 mol of solid NH4Cl in .500 L of .40 M NH3. Assuming no volume change. Without the use of Henderson-hasselbalch
*April 1, 2014 by Anisha*

**physics**

Calculate the magnitude of the gravitational force between the Earth and an m = 6.00 kg mass on the surface of the Earth. The distance to the center of the Earth from the surface is 6.37×103 km and the mass of the Earth is 5.98×1024 kg. B)Calculate the magnitude of the ...
*March 22, 2013 by Sara*

**Chemistry, due soon please help**

calculate the mass of 100 ppm of CO2 int the atmosphere if the atmospheres mass is 5.3x10^18 kg
*December 16, 2013 by Joel*

**Finance**

You purchase a machine for $50,000, depreciated straight-line to a salvage value of $20,000 over its 6 year life. If the machine is sold at the end of the 6th year for $27,000, what is the after-tax cash flow from the sale, assuming your tax rate is 40%? A. $21,200 B. $22,200 ...
*December 2, 2013 by Thad*

**Chemistry**

Suppose that two hydroxides, MOH and M'(OH)2, both have Ksp = 1.0 10-12 and that initially both cations are present in a solution at concentrations of 0.0036 mol · L-1. Which hydroxide precipitates first? I know MOH ppt's first...but am not sure how to approach this second ...
*March 19, 2010 by Val*

**Chemistry HELP ME!!!!**

A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(ag). When 45.00 mL of 4.8724 x 10 -1M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10 -1M NH4F solution, 1.524g ...
*February 10, 2010 by Macey*

**statistics**

You are a travel agent and wish to estimate, with 98% confidence, the proportion of vacationers who use an online service or the Internet to make travel reservations. Your estimate must be accurate within 4% of the population proportion. a) No preliminary estimate is available...
*April 6, 2011 by alex*

**chemistry**

how many grams of ammonium sulfate are needed to make a .25 M solution at a concentration of 6M?
*May 11, 2010 by mora*

**chemistry**

How many grams of HCOOH are needed to make 3.7 liters of aqueous solution of pH=3.5?
*October 6, 2010 by nick*

**College Chemistry**

How many grams of BaCl2 are needed to make a 250mL of 15% solution?
*November 5, 2010 by Kim*

**org chm**

how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?
*November 17, 2010 by carol*

**chemistry**

how many grams of manganese (4) oxide are needed to make 5.6 liters of a 2.1 solution
*March 10, 2011 by robert*

**chemistry**

how many grams of calcium nitrate are needed to make 100mL of a 0.5M solution
*March 14, 2011 by Anonymous*

**chemistry**

How many grams of magnesium iodide are needed to make 125 ml of a 5M solution
*March 31, 2011 by John*

**Chemistry**

How many grams of bromine liquid are needed to make 6 moles of KBr?
*August 29, 2011 by pheope*

**meth**

how many equal line segments are needed to make a row of 25 triangles
*October 29, 2012 by Anonymous*

**Chemistry**

How many grams of H2SO4 are needed to make a 4.50 m solution in 300 g H2O?
*March 20, 2013 by Samantha*

**math**

How many balls of clay and straws are needed to make a hexagonal pyramid?
*March 25, 2013 by Victoria*

**Math**

Form 1 1/2 circles using only 1/4s. How many 1/4 pieces are needed to make 1 1/2?
*October 27, 2013 by Sandy*

**Science**

How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s^2?
*October 29, 2013 by AshKay*

**Physic (concepts-please check my thoughts)**

A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to produce rotation. The net torque acting on a ...
*December 10, 2006 by Diane*

**chemistry**

a 10.0mL vinegar sample was completely neutralized by 22.5mL 0.2M NaOH solution. calculate molarity and % of acetic acid in vinegar. please help
*April 26, 2010 by confused*

**chem**

1. 50.00 mL of an unknown monoprotic acid is titrated with 0.132 NaOH. It takes 25.25 mL of base to reach the equivalence point. Calculate the concentration of the acid.
*July 25, 2010 by Anonymous*

**JJ**

A 30.84 mL volume of 0.128 M NaOH is required to reach the phnolphthalein endpoint in the titration of a 5.441 g sample of vinegar. Calculate % acetic acid in the vinegar.
*August 25, 2010 by Jeffrey*

**chemistry**

Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2CH2COOH with 0.1000 M NaOH after 26.5 mL of the base have been added. Ka of butanoic acid = 1.54 x 10-5.
*October 31, 2010 by karla *

**chemistry**

Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2CH2COOH with 0.1000 M NaOH after 26.5 mL of the base have been added. Ka of butanoic acid = 1.54 x 10-5.
*October 31, 2010 by karla *

**Chemistry**

Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got the answer of 3.66 to 3 sig figs, but it's wrong. Can you please tell me what I did wrong? -Thanks
*March 27, 2011 by Katrina*

**AP CHEMISTRY**

Calculate [OH-] and pH for the following strong base solution; a solution formed by mixing 10.0 mL of 0.011 M Ba(OH)2 with 28.0 mL of 7.4 10-3 M NaOH working and answer would be appreciated
*February 18, 2012 by MARY*

**Chemisty**

A total of 31.3 ml of 0.15 N NaOH was required to reach a phenolphthalein endpoint in titrating 6.00 g of vinegar. Calculate the number of equivalents of acetic acid in vinegar.
*February 20, 2012 by Eliazbeth *

**lab**

A total of 31.3 ml of 0.15 N NaOH was required to reach a phenolphthalein endpoint in titrating 6.00 g of vinegar. Calculate the number of equivalents of acetic acid in vinegar.
*February 20, 2012 by Eliazbeth *

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