Monday

March 2, 2015

March 2, 2015

Number of results: 26,937

**Chemistry**

Can somebody help me with this question? Zinc metal is placed in a solution of copper ions and undergoes an oxidation-reduction reaction. Which direction is the spontaneous reaction? Zn metal goes into solution. Cu(II) ions come out. Zn + Cu+2 ==> Zn+2 + Cuo Zn metal is ...
*February 10, 2007 by Lisa*

**Chemistry**

Solution Density(g/L) Boiling Point Freezing Point 1.0m C2H5OH(aq) 1.05 100.5 -1.8 1.0m HCI(aq) 1.03 101.0 -3.7 1.0m NaCl(aq) 1.06 101.0 -3.7 2.0m NaCl(aq) 1.12 102.1 -7.4 1. Which properties in the table are colligative properties? 2. What can you conclude about the ...
*January 20, 2011 by Nicole*

**business**

The table given below provides the shipping costs and supply available at each source. Find the minimum-cost shipping solution for the transportation problem. Provide a table of shipping quantities and the minimum value for the objective function for the following methods: * ...
*July 24, 2010 by Anonymous*

**Chemistry**

A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 375 mL of a solution that has a concentration of Na^+ ions of 1.10M? I tried multiplying .375 L by 1.10 M to get the ...
*September 28, 2009 by Cory*

**Physics**

Collapsible plastic bags are used in hospitals for infusions. We want to use such a bag to infuse a electrolyte solution into the artery of a patient. For this we mount the bag at a height h above the arm of the patient. Assuming that the particular gauge pressure in the ...
*November 25, 2009 by Sam*

**Chemistry check**

First, percent error can be negative, correct? Because in my lab I got -32%. Here are my questions that I need checked: 1. List possible manipulation errors that might contribute to the following errors in results: 1) obtaining a significantly larger amount of NaCl than was ...
*February 13, 2007 by Jay*

**chemistry**

I need help on these questions. They all seem pretty similar i think? i don't know what formula i am suppose to use. And what does nonvolatile mean? is that like a clue or something? 1) 2.6 g of the nonvolatile solute sucrose (C12H22O11) is added to 465 g of water at 25oC. ...
*January 24, 2009 by confusedkid*

**algebra 1**

*I have asked countless people to help me with this story problem and nobody seems to know how to do it! Please help! Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 ...
*May 2, 2013 by Brittany*

**chemistry**

At 20. °C, the vapor pressure of toluene is 22 millimeters of mercury and that of benzene is 75 millimeters of mercury. An ideal solution, equimolar in toluene and benzene, is prepared. At 20. °C, what is the mole fraction of benzene in the vapor in equilibrium with this ...
*February 2, 2009 by Unsure*

**Biology**

How is it a solution of 300mOsM NaCl is both isotonic and isosmotic to a red blood cell with an osmolarity of 300mOsM? Yet a solution of 300mOsM urea is only isosmotic to that red blood cell?
*October 14, 2011 by p*

**Chem hw!**

1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas at 759 mm Hg pressure ...
*March 11, 2010 by Teisha*

**Chem hw!**

1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas at 759 mm Hg pressure ...
*March 11, 2010 by Teisha*

**Chemistry**

The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg) help, how do i solve this...
*February 4, 2008 by Jake*

**Algebra II**

1) find n of the arithmetic sequence A1 = -5, An = 63, d = 2 2) Find the common ratio in the geometric sequence:7, -28, 112 ... 3) the vertex of the graph of y = -99(x-7)^2 - 2 is a minimum value ? a) True b) False 4) There is a solution to y = 7 and x^2 = -y^2 + 9. a) true b...
*May 1, 2011 by anonymous*

**College Algebra**

A pharmacist wants to mix two solutions to obtain 100 cc of a solution that has an 8% concentration of a certain medicine. If one solution has a 10% concentration of the medicine and the second has a 5% concentration, how much od each of these solutions should she mix? I am ...
*January 7, 2015 by Math H of the medcater*

**Chemistry**

A laboratory stockroom has a stock solution of 90%(m/v) sulfuric acid,H2SO4(aq). If a technician dilutes 50ml of the stock solution to a final volume of 300ml, what will be the new mass/volume percent concentration?(HINT: the dilution formula can be used for concentration ...
*February 21, 2013 by Lori*

**Calculus**

Suppose that a population develops according to the logistic equation dP/dt = 0.06P−0.0001P^2 where t is measured in weeks. 1) The carrying capacity is . 2) The growth rate k is . Use your calculator to sketch a direction field for this equation. Sketch the solutions ...
*November 17, 2013 by Sarah*

**Algebra!**

Can someone help me with these problems so i can do the rest of my textbook work on my own plz? What is the value of n so that the expression x^2+11x+n is a perfect square trinomial? (1 point) What is a solution of x^2+6x=-5? (1 point) What is the solution of x^2+14x+112=0? If...
*March 24, 2014 by Gabby*

**Gen Chemistry**

The following absorption data of a solution was collected in a cell with 1 cm path length. The absorption of the same substance in a solution with unknown concentration was 0.197. What is the concentration of the unknown substance? c (M) A 1.00x10-3 0.119 2.00x10-3 0.243 3....
*December 12, 2010 by Kevin*

**statistics**

1. The new Twinkle bulb has a standard deviation σ = 34 hours. A random sample of 77 light bulbs is selected from inventory. The sample mean was found to be x= 492 hours. Question: Find the margin of error E for a 90% confidence interval. Round your answer to the nearest ...
*April 6, 2010 by looking for someone to varify my work please*

**Chemistry**

I need some help finding the net ionic equation for these two problems: 1. Bromine is added to a dilute solution of sodium hydroxide. 2. Sulfuric acid is added to a solution of lithium hydrogen carbonate. This is what I have for reactants: Br2 + NaOH and H2SO4 + LiHCO3. I'm ...
*January 6, 2010 by Anonymous*

**chemisty**

I'm totally confused about this question....I don't know what kind of an answer the teacher is looking for. The worksheet has the header "Preparation of solutions for Beer's Law Lab." That said....here's the question: Describe the preparation of 250.0mL of a 0.10 M sucrose (...
*February 22, 2011 by desiree*

**chemistry- Dr.Bob, can you help me out please?**

If I had two unknown chemicals (in solid form) mixed together, how could I go about identifying the individual components of the mixture? Is it possible, by UV, IR, GC, or HPLC? The problem I have is that with: GC= sample is destroyed & if you don't know what compound you have...
*February 16, 2009 by ~christina~*

**business**

I hope that someone can help me answer this question because I am totaly mind blocked. My question is: I will be interviewed for an evening business report. As CEO of your computer manufacturing company, you must answer the following question. How do you account for the loss ...
*June 25, 2007 by blondie*

**Science**

A solution contains 0.01M ethyl acetate, 0.10M acetic acid and 0.10M ethanol. For the same equilibriujm constant of 2.00, calculate the equilibrium concentrations of ethyl acetate, ethanol, and acetic acid in the solution.
*July 24, 2012 by Eric*

**biology**

the molecular weight of the protein is about 45 kilodaltons, and the molecular weight of glucose is about 180 daltons. jHow can you estimate the number of molecules of glucose in the 5% solution compared to the number of albumin molecules in its 5% solution?
*November 26, 2012 by bio123*

**Chemistry**

Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.
*February 2, 2013 by Anna*

**chemistry**

Solid lead(II) iodide was prepared by reacting 65.0 mL of a solution containing 0.218 M lead(II) ions with 80.0 mL of a solution containing 0.265 M iodide ions. If the actual yield of the reaction was 3.26 g, which choice is closest to the %yield of the reaction?
*January 22, 2015 by K*

**Scenario Question?**

Dan is an employee at a regional mid-size computer company that has recently been sold to a larger, national computer manufacturing corporation. Dan is in charge of computer production orders, and because of this recent shift in ownership, his department’s day-to-day ...
*May 27, 2008 by Ree*

**CHEMISTRY**

You carry out a reaction with 28.9mL of 0.711M solution of NiNO3)2. The reaction has a change in H of -26.4KJ/mol rxn. What is the q, the heat of the reaction, in joules? I first found the mols of the solution using molarity and then found the joules of the reaction through ...
*April 23, 2013 by markymark*

**AP Chemistry**

a student titrates three samples of 0.3% hydrogen peroxide solution made from a bottle of 3% hydrogen peroxide solution dated 10/31/2007. would you expect the calculated molarities of the samples to be higher or lower than the following values: trial 1: .0015 molar trial 2: ....
*October 5, 2013 by Gabriella*

**Chemistry**

A student recorded the following data for copper sulfate pentahydrate. Weight of crucible and cover (after heating to constant weight), 28.120g Weight of covered crucible plus sample, 31.020g Weight of covered crucible plus sample after heating to constant weight, 30.020g ...
*November 8, 2009 by Anonymous*

**Chem**

A solution of lithium chloride in water has a mole fraction of 0.0500 in LiCl. What is the molality? Mole fraction = moles of LiCl over total moles of solution Molality=moles of LiCl per kg of solvent How do I link this information?
*April 25, 2008 by Ginger*

**Algebra 1**

23.what is the slope of a line parallel to a line represented by the equation x=2y-3? 19.what is the solution to the following system of equation? Y=4x-8 Y=2x 16.which graph below shows the function f(x)=-3x-1? 12.what is the solution to the following system of equations? Y=2x...
*January 21, 2012 by Elyon*

**Chemistry Problem**

A student proposes to use visible spectroscopy to measure the kinetics of the permanganate/oxalic acid reaction. The initial permanganate solution was very dark. For a 1 cm sample cell, the absorbance A = 2,500[MnO4]. As a practical rule of thumb, Beer's law is only accurate ...
*January 22, 2013 by Amy*

**chemistry**

Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...
*November 26, 2011 by paul*

**English**

1. Do first things first. 2. Do the first things first. (Which one is right?) 3. What kinds of health problems does the people in the pictures have? Look at the person in Picture One. He is holding a measuring tape. Doesn't he look heavy? He needs to be on a diet. How can we ...
*September 1, 2009 by John*

**Physics**

Please answer asap with complete solution thanks a lot. I need the solution to answer other questions much alike to this one. :) Two electrons are 10^-15 meters apart. One electron is fixed on its position. The other, originally at rest, is released. How fast is the free ...
*July 3, 2012 by Jezrell*

**physics**

Please answer asap with complete solution thanks a lot. I need the solution to answer other questions much alike to this one. :) Two electrons are 10^-15 meters apart. One electron is fixed on its position. The other, originally at rest, is released. How fast is the free ...
*July 3, 2012 by Jezrell*

**maths**

for this quadratic equation: y2-4y-16 = 0 which two options are correct solutions, rounded to three decimal places? 1) -4.483 2) -3.243 3)-2.472 4) -1.472 5) -0.536 6) 5.243 7) 6.472 8) 12.443 You have to use the quadratic equation, we will be happy to check your work. the ...
*April 15, 2007 by angel*

**Chemistry/maths**

Using the following stock solutions: NaCl, 100mmol KCl, 200mmol CaCl2, 160mmol Glucose, 5mmol Calculate the volumes of each stock solution and the volume of water needed to prepare 100ml of a single solution containing NaCl at 5.0mmol KCl at 2.5mmol CaCl2 at 40mmol Glucose at ...
*October 22, 2009 by jess*

**Science**

this my science homework about milo so yeah if you can answer these would be great. What is the solute? What is the solvent? Was the mixture a solution or a suspension explains why? Which part of the mixture is the sediment? Explain why the particles settled on the bottom? ...
*May 30, 2010 by Jeremy Yea*

**Chemistry**

Help with any of these: 21. Aluminium sulphate is often used by gardeners to acidify soil and can be produced by the reaction 2Al(OH)3(aq) + 3 H2SO4(aq) à Al2(SO4)3(aq) + 6 H2O(l) The volume of 0.275 mol/L H2SO4(aq) needed to react completely with 112 mL of 0.355 mol/l Al(...
*September 9, 2012 by Emily*

**Chemistry **

Could some please tell me if I did these problems correctly? (I know that I did not Cancel common aqueous ions yet) Question: Write the net ionic equation for the following 1)Mixing solution of barium acetate and sodium phosphate 2)Mixing solution of thallium sulphate and ...
*November 7, 2009 by Dan*

**business statistics**

A sample of 40 investment customers serviced by an account manager are found to have had an average of $23,000 in transactions during the past year, with a standard deviation of $8500. A sample of 30 customers serviced by another account manger averaged $28,000 in transaction...
*August 4, 2009 by Heidi*

**math**

1. 2(x - 3) = 2x a) one solution b) no solutions c) infinitely many solutions 2. 3(y - 3) = 2y - 9 + y a) one solution b) no solutions c) infinitely many solutions 3. 10x - 2 - 6x = 3x - 2 + x a) one solution b) no solutions c) infinitely many solutions 4. 4( x + 3) + 2x = x...
*December 18, 2013 by victoria*

**chemistry(just need to clarify, no need to solve)**

When a sample of NO2(g) (5.641 mol) is placed in 360.0 L reaction vessel at 716.0 K and allowed to come to equilibrium the mixture contains 3.412 mol of NO(g). What is the equilibrium concentration (mol/L) of NO(g)? When a sample of PCl5(g) (1228 grams) is placed in 270.0 L ...
*April 12, 2010 by bme1*

**Chemistry**

The general statement: "like dissolves like" means: identical compounds will dissolve to form a solution. one stronger component must beak down the weaker component. liquids will only dissolve in liquids. solid will dissolve in liquids. the components of a solution must have ...
*July 18, 2008 by Melissa*

**11th grade ..CHEMISTRY**

This is a Quantitative Redox titration. (KMnO4) = 1.8 G.. 500 ML after the experiment we had to record the data of the 3 trials. 1. Trial - VolUme FeSO4 = 10.00 Ml - VOlume KMnO4 11.00 Ml 2. Trial - VolUme FeSO4 = 10.00 ML - VOlume KMnO4 11.15 Ml and we ran outa the solution...
*November 5, 2008 by Komal*

**science**

OBJECTIVE: to find out which of two indicators, methyl orange or phenolphthalein, gives more reliable and consistent results in the titration of H3PO4 with NaOH. REQUIREMENT: (1). Phosphoric acid solution of unknown concentration. (2). Standard NaOH solution. (3). Methyl ...
*October 28, 2013 by somiah*

**mba business reserach methods**

Sampling A manufacturing company's quality control personnel have recorded the proportion of defective items for each of 500 monthly shipments of one of the computer components that the company produces. See data below. The company doesn't have time to review all of these. (a...
*March 20, 2011 by Carolina*

**Physics**

Dry saturated steam at 100'C is passed into 250gm of a mixture of ice and water contained in a calorimeter of thermal capacity 45J/K.When all the ice has just melted,the mass of the content of the calorimeter has increased by 10gm due to condensed steam.Assuming no heat ...
*March 11, 2012 by O.E Olaleye*

**Chemistry**

Include an explanation, balanced chemical equation, units, significant figures and/or calculations where appropriate. Standardization of NaOH Solution Trial 1: 0.501 g KHC8H4O4 15.22 mL NaOH Trial 2: 0.503 g KHC8H4O4 15.11 mL Trial 3: 0.500 g KHC8H4O4 15.10 mL Using the data ...
*March 2, 2009 by Jake*

**Chemistry**

The boiling point of an aqueous solution is 102.16 C. What is the freezing point? Dr. Bob, If you happen to answer this question, I was the one that a question earlier about how to know what Kf constant to use [water vs benzene?] and i didn't notice that it was given in the ...
*February 17, 2012 by Tracy*

**Business statistics**

1(a)Let Y have a binomial distribution with parameters n and p. We reject Ho: p=1/2 and accept H1: p>1/2 if Y>=c. Find n and c such that the probability of a Type I error is .10, and P(reject Ho/p=2/3)=.95. (b)What is the probability of a Type II error? 2.Let xbar be the...
*May 10, 2010 by John*

**Chemistry**

The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular weight for chlorophyll a is 893.49 g/mol. The ...
*July 16, 2012 by Anonymous*

**chemistry**

Q.1Explain why CH3COOH2^+ is in terms of protonic concept? Q.2 0.1 mole HCl is dissolved in distilled water of volume V then at a limit V =infinite pH of the solution is equal to______? Q.3One litre of water contains 10^-5 moles of H^+ ions at 25 degree Celcius.Degree of ...
*January 6, 2010 by anonymous*

**statistics**

Use the method specified to perform the hypothesis test for the population mean µ. The highest acceptable level of pesticide found in quail has been limited to 0.35 parts per million (ppm). A hunting organization measured the level of the pesticide found in quail harvested ...
*April 13, 2010 by looking for someone to varify my work please*

**math**

I'm trying to follow a research paper The paper shows an equation to minimize. That makes perfect sense. Then, the paper says: "The optimal solution to the least squares problem [above] is found by differentiation as a solution of a linear system of equations." I am very ...
*April 18, 2008 by mathstudent*

**Chemistry**

You are asked to prepare a pH = 4.00 buffer starting from 1.50 L of 0.0200 M solution of benzoic acid (C6H5COOH) and some added sodium benzoate salt (C6H5COONa). a) Find the pH of the benzoic acid solution BEFORE adding the salt. b) Use the Henderson-Hasselbalck equation to ...
*February 13, 2013 by Lacy*

**Chemistry**

You are asked to prepare a pH = 4.00 buffer starting from 1.50 L of 0.0200 M solution of benzoic acid (C6H5COOH) and some added sodium benzoate salt (C6H5COONa). a) Find the pH of the benzoic acid solution BEFORE adding the salt. b) Use the Henderson-Hasselbalck equation to ...
*February 13, 2013 by Lacy*

**chemisry**

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. 100 ml of a 0.1M solution of the above acid is titrated with 0.1 M NaOH. After an ...
*February 12, 2012 by ashley *

**math**

For a certain experiment, a student requires 100 cubic centimeters of a solution that is 8% HCI. The storeroom has only solutions that are 15% HCI and 5% HCI. How many cubic centimeters of each available solution should be mixed to get 100 cubic centimeters of 8% HCI?
*August 17, 2010 by Mary*

**chem**

When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!
*January 16, 2013 by Lala*

**chemistry**

calculate the change in pH when 9.00ml of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq). ...Calculate the change in pH when 9.00,L if 0.100M NaOH(aq) is added to the original buffer solution.
*October 28, 2012 by mike*

**AP Chemistry**

An organic compound was synthesized and found to contain only C, H, N, O, and Cl. It was observed that when .150g sample of the compound was burned, it produced .138g of CO2 and .0566g of H2O. All the Nitrogen in a different .200g sample of the compound was converted to NH3, ...
*September 15, 2009 by Monique*

**science(chem)**

I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you
*September 12, 2008 by ~christina~*

**science(chem)**

I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you
*September 13, 2008 by ~christina~*

**Chemistry**

In fluorescence, why do we have to preapre a calibaration curve for every compound in our sample?
*December 8, 2008 by Beckhamano*

**Chemistry**

In fluorescence, why do we have to preapre a calibaration curve for every compound in our sample?
*December 8, 2008 by Beckhamano*

**chemistry**

a 16.2 L sample of CO(g) at 1.50 atm and 200.*C is combined with 15.39g of Fe2O3(s), How many moles of CO(g) are availabe for the reaction
*February 11, 2009 by David*

**chemistry**

What volume (in liters) does 3 g sample of Argon (Ar) gas occupy at standard conditions (STP)?
*February 24, 2009 by margaret*

**Pre Calculus**

Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to decay
*July 26, 2009 by Shellie*

**Chem**

How many moles of ions are released when this sample dissolves in water? 3.55*10^18 formula units of Ba(OH)2*8H2O
*November 3, 2009 by Jen*

**Statistics**

Formula used to easily calcuate sample size. Please give example.
*January 26, 2010 by Bryant*

**chem**

5 drops of AgNO3 must be added to 1 L of a water sample: 46.1 mg SO42-/L and 30.6 mg Cl -/L. What will be the precipitate that forms?
*April 22, 2010 by Tommy*

**Math**

The half-life of strontium-90 is 28 years. How long will it take a 60 mg sample to decay to a mass of 15 mg?
*May 19, 2010 by Caitlyn*

**Statistics**

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 my answer was 0.75 is this correct 0.75 1.51 0.11 5.00
*June 20, 2010 by Jacob*

**Jared**

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 0.75 1.51 0.11 my answer was 0.75 is this 5.00 correct
*June 20, 2010 by alex*

**Chemistry**

A student worked with a sample of ZnSO4.7H2O, what is the stoichiometric ratio of salt to water?
*July 22, 2010 by Rose*

**statistics**

Sample size is 24, Mean rate of 6.50%, Standard Deviation is 1.20. Calculate 90% of confidence interval
*October 14, 2010 by sue*

**chemistry**

What is the specific heat capacity of lead if a 18.9 g sample increased 12.9 C upon the addition of 31.5 J? The units are J/(gK)
*October 17, 2010 by Anthony*

**Chemistry**

What is the molecular weight of a gas if a 21.0g sample has a pressure of 836mm Hg at 25.0 degrees C in a 2.00L flash?
*December 7, 2010 by Shirley*

**Chemistry**

How many milligrams of NaHCO3 are in a 500mg tablet if 40.0 mL of 0.120M HCL is required to neutralize the sample?
*December 9, 2010 by prince*

**Chem**

A sample containing 1.2x10^-2 mol HCl is completely neutralized by 100.0mL of Sr(OH)2 what is the [Sr(OH)2]?
*December 15, 2010 by Anonymous*

**organic chemistry**

What is the {\rm HCl} concentration if 54.2 mL of 0.100 M {\rm NaOH} is required to titrate a 30.0 mL sample of the acid?
*December 15, 2010 by casey*

**math**

The half life of iodine - 131 is 8 days. How long will it take for 7/8 of the sample to decay?
*December 29, 2010 by George*

**Statistics**

How large a sample from N(80,20) population is needed so that the sampling distribution of the mean has a standard deviation of 1?
*January 4, 2011 by Casey*

**statistics**

To display the major of a sample of college students, which graph would be the best choice?
*January 23, 2011 by Anonymous*

**Calculus**

Ba has a half-life of 283.2 hours. How long would it take for the 50 mg of Ba in a sample to decay to 1.0 mg?
*February 2, 2011 by Tania*

**chemistry**

Calculate the mass in grams for a gold sample that absorbs 225 to change its temperature from 16.0 to 36.0.
*February 3, 2011 by Heather*

**Chemistry**

F2 (g) <--> 2 F (g) A 1.00 mol sample of F2 is placed in a 100. L container at 1000K. What is the pressure of the F2 before any decomposes?
*February 17, 2011 by Michael*

**Chemistry**

F2 (g) <--> 2 F (g) A 1.00 mol sample of F2 is placed in a 100. L container at 1000K. What is the pressure of the F2 before any decomposes?
*February 17, 2011 by Michael*

**Chemistry**

F2 (g) <--> 2 F (g) A 1.00 mol sample of F2 is placed in a 100. L container at 1000K. What is the pressure of the F2 before any decomposes?
*February 17, 2011 by Michael*

**science**

If 1L (Liter) of 0.1N (Normal) NaOH is needed to titrate a wine sample, how many moles of H+ was neutralized?
*March 16, 2011 by joey*

**statistics**

A random sample of n=36 scores is selected from a population. Will this have a definite normal distribution?
*March 17, 2011 by Leticia*

**chemistry**

What total mass of a 16 gram sample of 60co will remain unchanged after 15.8 years?
*April 7, 2011 by Anonymous*

**chemistry**

what sample size of .9181M vinegar would require 27.50 mL of .5185M of NaOH for neutralization?
*April 13, 2011 by maddie*

**chemistry**

Do the relative proportions of elements ina agiven compound vary from sample? pls help
*September 23, 2011 by ted*

**chemistry**

Do the relative proportions of elements ina agiven compound vary from sample? pls help
*September 23, 2011 by ted*

Pages: <<Prev | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | **90** | 91 | 92 | 93 | 94 | 95 | 96 | Next>>