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September 23, 2014

Search: 355g sample of a saturated solution of KNO3

Number of results: 25,333

business statistics
The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines If The average length of a flight by regional airlines in the United States has been reported as 299 miles. If ...
August 1, 2009 by Samantta

business statistics
The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines If The average length of a flight by regional airlines in the United States has been reported as 299 miles. If ...
August 1, 2009 by Tonya

Chemistry
Concentrated hydrochloric acid is a 38% solution of HCL in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of 1:200 HCL solution? The answer is not 2.12ml My calculation: 1.18g/ml x 1000ml x 0.38/36.5 = 12...
July 29, 2012 by Fai

Chemistry Urgent
A calorimeter contains 32.0mL of water at 13.0∘C . When 2.30g of X (a substance with a molar mass of 82.0g/mol is added, it dissolves via the reaction X(s)+H2O(l)X(aq) and the temperature of the solution increases to 30.0∘C . Calculate the enthalpy change, H ...
March 11, 2014 by Anna

Math
1. Marissa is a photographer. She sells framed photographs for $100 each and greeting cards for $5 each. The materials for each framed photograph cost $30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40 greeting cards each ...
January 20, 2014 by Jessica

Chemistry
If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps Step 1: make the ...
March 5, 2013 by Kristien

Chemistry
If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps Step 1: make the ...
March 5, 2013 by Kristien

science
Based on the reactivity series, decide whether the following reaction will occur. If you think there will be no reaction, write down why you think this. If you think a reaction will happen, write down why you think it will happen, and the word equation to go with it. a) iron ...
June 27, 2011 by ishaan

chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this ...
June 17, 2013 by Annie

Chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this ...
June 17, 2013 by Jessica

statistics
The 92 million Americans of age 50 and over control 50% of all discretionary income (AARP Bulletin, March 2008). AARP estimated that the average annual expenditure on restaurants and carry out food was $1873 for individuals in this age group. Suppose this estimate is based on ...
July 20, 2011 by Anonymous

economics
i have to submitt a project on "consumer awareness in india", so can i get some writings or a sample of it and a case regarding it. pleaseeeeeee its urgent!!!!
October 19, 2006 by osama

Chemistry
A sample of natural gas is 80.0% CH4 and 20.0% C2H6 by mass. What is the heat from the combustion of 1.00 g of this mixture? Assume the products are CO2 and H2O. How do I do this
November 1, 2007 by Lauren

Chemistry
A 32.0 mL sample of hydrogen is collected over water at 20.0 degrees celcius and 750.0 torr. What is the volume of the dry gas at STP?
February 23, 2008 by Tyran

Chemistry
Calculate the concentration of a 50.0mL sample of HBr acid, which was titrated with 37.7 mL of 0.57 M NaOH base. Why is an overshot endpoint not a good titration?
April 10, 2008 by Jared

Physics
A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
May 5, 2008 by J

physics
A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
May 5, 2008 by J

computers (Excel Macro)
I have no idea on how to copy and paste a cell with value only. It will be appricated if anyone call show me a sample.
August 29, 2008 by Lamp

college
what will be the final temperature of a 514-g sample of water, intially at 10.0 celsius, after 90.8 kilo joules have been added o it ?
February 28, 2009 by queen

Chem
I need help setting this up, please. What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312g sample by 15C
May 27, 2009 by Kay

Chemistry
Given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? 84.3g?
November 9, 2009 by c

chemistry
If 4.57 grams of AgBr was isolated in a gravimetric analysis of a 9.30 gram sample, what is the % Br- by weight in the samples? please provide steps to get to answer
February 28, 2010 by Tim

chemistry
calculate the number of liters of liquid ethanol (density = 0.789g/ml) required to obtain a sample containing 1.00*10^25 C2H5OH molecules
February 28, 2010 by stephen

chemistry
A 0.821 sample of a substance composed of diatomic molecules has a mass of 131.3g. Identify this molecule. May I have your expert help with this question? Thank you.
April 22, 2010 by Tom

Statistics
A sample of four supermarkets is to be selected from a total of eight in a small town. How many different random samples without replacement can be drawn?
May 6, 2010 by Kassie

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010 by Amber

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010 by amber

Chemistry
A 1.00-L gas sample at 100.C and 611 torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
November 6, 2010 by Anonymous

stat
a sample of 150 adults is composed of 100 women and 50 men. estimate the standard error of the proportion for the female population
November 9, 2010 by suzanne

general science
Which of the following is an example of homogeneous mixture? b. a typical soil sample c. a glass of orange juice d. a bottle of vinegar
November 15, 2010 by sherrie

basic critical thinking
select a topic of interest to you and explain how you would come up with a reliable sample for obtaining peoples' opinions.
November 18, 2010 by Sheryl

Physics: Fluids
A sample of an unknown material weighs 260 N in air and 175 N when immersed in alcohol of specific gravity 0.700.
December 2, 2010 by B.Ha

chemistry
what is the total number of joules released when a 5.00 gram sample of water changes from liquid to gas at 100 degrees Celsius?
December 15, 2010 by Help

MBA
How might you specify a simple random sample of 100 first year students at European School of Economics?
February 13, 2011 by Hala

Chemistry
How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26C? Show all work used to solve this problem.
March 19, 2011 by Victoria Ann

Chemistry
A 1.56L sample of Neon gas at STP is heated to 100C, what is the final pressure assuming the volume stays the same?
April 25, 2011 by Terrie

math 120
a sample of 12 observations taken from a normal distribution produced the following data. 13 15 9 11 8 16 4 9 0 14 16 12 . construct the 95% confidence interval for mean
May 21, 2011 by umray

physics
Does the following represent a sample or a population? calories created while burning all of the coal taken from a rail car
June 17, 2011 by Halima

statistics
What is the probability that, in a random sample of 100 drivers aged 16 to 18, 23% or more would be involved in accidents in a one year period?
July 4, 2011 by Reuben

Math
When using the student's t distribution to test mu, what value do you use for the degrees of freedom if the sample size is 42? a. 41 b. Can not be determined from information given. c. 43 d. 42
August 7, 2011 by Justina

Statistics
Assume you want to estimate with the proportion of students who commute less than 5 miles to work within 2%, what sample size would you need?
October 26, 2011 by Carmella

stats
Determine the standard error of the mean if a random sample of 52 is pulled from a population with = 82 and = 18. Round your answer to two decimal places
November 4, 2011 by Anonymous

statistics
using excel find the variance of a sample of 30 observations selected randomly. Given that the median is 14.7, the mode is 11 and the coefficientof variation is 45%.
January 7, 2012 by nora

Chemistry Problem!
What weight of sample containing 8.00 % Fe3O4 must be taken to obtain a precipitate of Fe(OH)3 that, when ignited to Fe2O3, weighs 150 mg?
January 16, 2012 by Sarah

chem
How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26C? Show all work used to solve this problem.
February 8, 2012 by alex

Math
A school principal randomly choose 75 students for a survey on the cafeteria food. Determine whether the sample may be biased. Explain.
February 23, 2012 by Elaina

Physical science
I need help on how to set up a formula for 27c and 750 mm hg,a sample of hydrogen occupies 5.00 l how much space will it occupy at stp
October 2, 2012 by Glenda

geology
what is the Sample Locality Age (Million years)in Granite: Scottish Highlands, Gabbro: Sudbury Canada and Gneiss: Greenland?
October 27, 2012 by john

chemistry
select from the following the most appropriate concentration for NaOH to titrate a sample that contains 250mg of aspirin: a. 0.01 M b. 0.10 M or c. 1.0 M and explain why you chose it.
November 13, 2012 by Anonymous

statistics
For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each treatment, what is the critical value for the F-ratio using α = .05? a. 3.88 b. 3.49 c. 3.74 d. 3.34
November 14, 2012 by Robbie

chemistry
a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?
November 25, 2012 by Jules

chemistry
a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?
November 25, 2012 by Jules

ap chemistry
To what temperature must a sample of helium gas be cooled from 123C to reduce its volume from 3.7 L to 0.27 L at constant pressure? Answer in units of K
February 9, 2013 by cheri

ap chemistry
A 6.9 gram sample of a gaseous substance occupies 10 L at 63C and 537 torr. What is the density of the gas under these conditions? Answer in units of g/L
February 9, 2013 by cheri

Statistics
What sample size is needed to find the percent of the customers at a store that are married, if 90% confidence is desired to be within a 5% margin of error?
February 27, 2013 by Scot

statistics
12. Suppose we are estimating p and we have no prior estimate of p. Find the required sample size for a confidence level of 90% and a margin of error of 0.02.
May 8, 2013 by ali awan

statistics
A and B are events defined on a sample space, with the following probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A) = 0.5 and P(B | A) = 0.4
May 26, 2013 by DeeDee

math
A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75
May 28, 2013 by DeeDee

chemistry
A commercially available sample of sulphuric acid is 15% H2SO4 by mass (density=1.10g/ml) Calculate the molarity ,normality and molality.
June 3, 2013 by riya

physical science
a sample gas occupies 1.00 x 10 to the 6th at 575 mm Hg. if the pressure is changed to 950 mm Hg, what will its volume be if the temperature remains the same?
September 17, 2013 by Anonymous

Statistics
True or False One requirement of a random sample is that every individual in the population has an equal chance of being selected.
December 5, 2013 by Lyndyc

Biology Chemistry Part
I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece of paper and placed ...
September 26, 2010 by Kate

math
A chemist has 80 pints of a 20% iodine solution. How many pints of iodine must be added to produce a solution that is 33.1/3% iodine? Please help me work this through Let X be the number of pints of iodine that must be added. You start out with a mix that contains 16 pints of ...
March 2, 2007 by :)

Chemistry
A sample of a mixture containing only sodium chloride (NaCl) and potassium chloride (KCl) has a total mass of 4.000g. When this sample is dissolved in water and excess silver nitrate is added a white precipitate (AgCl) forms. After filtration and drying, this precipitate had a...
January 26, 2007 by Steve

algebra
identify the equation of the line through (-1,-4) and parallel to y=-6x+4 i got y=6x+10 Isn't the slope of the original line from y=-6x+4 equal to -6. Your solution has a slope of +6. Are those two lines parallel? i have to identify the equation of a line passing through ...
December 14, 2006 by eddie

biology
sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-axis ...
March 28, 2012 by shakti

biology
sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-axis ...
March 28, 2012 by shakti

Chemsitry
Hello. I'm not n=sure about these answers so i was wondering if someone could check them out? 27, A: Which is a stronger acid - sulfuric or carbonic acid? (Answer: Sulfuric acid.) 27, B: Imagine you have two glasses. One contains a solution of carbonic acid. The other contains...
May 11, 2009 by CRCAWF

chemistry
I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.
April 29, 2010 by albee

Algebra-Please check my calculations
Could you please check my answers and help with the ones I can't figure out- 1. Solution to the radical function sqrt(1/2x+1) = 1 is x = 0 True or False I think it is true according to my calculations 2.Solve x = sqrt(8x) 8x = x^2 x^2 - 8x = 0 x(x-8) = 0 x = 0 x-8 =0 x=8 the ...
October 19, 2010 by JayLynne-I had misprint in previous posting

Chemistry
Benzene (C6H6) and toluene (C5H5CH3) form nearly ideal solutions. At 20C the vapor pressure of benzene is 74.7 Torr and that of toluene is 22.3 Torr. a) Find the equilibrium partial pressures above a solution of 100.0 g benzene and 100.0 g toluene. b) Find the mole fractions ...
November 14, 2013 by Chris

biology
There is a beaker with 0.4% sucrose solution and the solute potential is -4. Inside the beaker, there is a dialysis bag with 01% sucrose solution, solute potential -1 and pressure potential 0. When the beaker is open to the atmosphere, what is the pressure potential of the ...
March 8, 2009 by izzy

Maths
Is (0, 3) a solution to the equation y = x + 3? I think yes. Is (1, −4) a solution to the equation y = −2x? I think no 3. Look at the following points. (4, 0), (3, −1), (6, 3), (2, −4) Which are solutions to y = x − 4? Choose all correct answers. ...
August 29, 2013 by Jman

chemistry... please help!
Pure glacial acetic acid HC2H3O2 has a freezing point of 16.62 degrees C. Its freezing point depression constant is Kf=3.57 Cm^-1. A solution was made by taking 9.755 g of an unknown non-electrolyte and dissolving it in 90.50 g of glacial acetic acid. The measured freezing ...
February 13, 2009 by Anonymous

STAT
Numerous studies have found that males report higher self-esteem than females, especially for adolescents (Kling, Hyde, Showers, & Buswell, 1999). Typical results show a mean self-esteem score of M  39.0 with SS  60.2 for a sample of n  10 male adolescents and a mean of M...
February 10, 2013 by Nickie

statistics
A sample of 148 of our statistics students rated their level of admiration for Hillary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06, and the standard deviation was 1.70. (For this exercise, treat this sample as the entire population of interest.) a. Use these ...
October 14, 2013 by eid2013

chem.
Silver(I) nitrate and sodium sulfate react to form silver(I) sulfate and sodium nitrate. Suppose 43.5 mL of 0.040 M silver(I) nitrate solution and 26.58 mL of 0.10 M sodium sulfate solution are mixed. What is the maximum number of grams of silver(I) sulfate that can be made?
February 28, 2010 by Tiffany

Chemistry
Silver(I) nitrate and sodium sulfate react to form silver(I) sulfate and sodium nitrate. Suppose 45.98 mL of 0.060 M silver(I) nitrate solution and 26.64 mL of 0.10 M sodium sulfate solution are mixed. What is the maximum number of grams of silver(I) sulfate that can be made?
February 22, 2012 by Jade

chemistry
Two liquids A and B on mixing form an ideal solution. The vapour pressure of the solution containing 2 moles of A and 4 moles of B is 0.2 atm. If the vapour pressure of pure A at a certain temperature is 0.3 atm then what will be the vapour pressure of pure B at that temperature?
May 28, 2013 by Adnan

Calculus
Find the particular solution of the differential equation particular solution of the differential equation dy/dx=(x−7)e^(−2y).
November 15, 2013 by Robin

alg.
Solve. (If there is no solution, enter NO SOLUTION.) y= x^2-x-4 y=x+4 (x, y) = ( , ) (smaller x-value) (x, y) = ( , ) (larger x-value) x^2 + y^2 =10 x+y=4 (x,y)= ( , ) smaller value (x,y)= ( , ) larger value
April 22, 2014 by HELP

algebra2
A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. * 11.08in. * 75.68in. Find ...
April 26, 2012 by Chelsea:)

Algebra 2
A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. * 11.08in. * 75.68in. Find ...
April 29, 2012 by Nancy

Chemistry
What is the percent ionization for each of the following acids? a. 0.022 M HClO2 solution of pH= 3.88 Answer obtained: .60% pH = 10^(-3.88) = 1.32 x 10^-4 % ionization= [H+] formed divided by MHA (original acid concent) x 100 = (1.32x10^-4)/0.022 x 100 = .60% b. 0.0027 M HClO2...
April 3, 2011 by Cassie

Critical Thinking
Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little room at the present ...
November 25, 2011 by Aya

College Algebra 2
for the following equation state the value of the discriminant and then describe the nature of the solution 11x^2+9x+11=0 What is the value of the discriminant? Which one of the statements below is correct? A. The equation has two imaginary solutions. B. The equation has two ...
September 8, 2009 by Lisa H

Math 117 Algebra
for the following equation, state the value of the discriminant and then describe the nature of the solution 11x^2+4x+18=0 What is the value of the discriminant? Which one is correct? a. the equation has two real solutions b. the equation has two imaginary solutions. c. the ...
June 18, 2010 by Ginger

Chem
There are three questions in particular that I am having problems with. Here they are 1. A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard ...
January 19, 2009 by Mark

Chemistry
Benzene sulfonic acid, C6H5SO3H, is a strong acid and will neutralise sodium hydroxide solution (a 1:1 molar ratio). Benzene sulfonic acid crystals (y grams) were weighed into a titration flask and titrated against sodium hydroxide solution (1.0 M) and needed a volume of 26.2 ...
June 15, 2014 by S

chemistry
Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
February 4, 2012 by Katie

chemistry
Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
February 5, 2012 by Katie

CHEMISTRY
a) Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). b) Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
March 27, 2012 by Jematormal91

Stats
In a simple random sample of 1000 people taken from City A, 13% are senior citizens. In an independent simple random sample of 600 people taken from City B, 17% are senior citizens. Is the percent of senior citizens different in the two cities? Or is this just chance variation...
August 3, 2013 by Helen

Algebra
I posted this yesterday but no one told me if my answers were correct. Can someone please check my answers. 1. Solve. 7x + 1 + 8x = x + 1 A) Identity B) No solution C) 1 D) 0 My answer: A) Identity 2.The length of one of the equal legs of an isosceles triangle is 8 cm less ...
April 22, 2007 by Noah

Science-Chemistry
Methyl amine is a weak base with a pKb=3.35. Consider the titration of 30.0mL of .030M of Methyl amine with 0.025M HCl. a) Write the appropriate equation for the reaction. b) Calculate K for the reaction in part (a). c) Calculate pH of the initial methyl amine solution (0mL ...
April 19, 2013 by Joe

Physics -- check answers please
1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that 2 kg of water will ...
March 4, 2014 by Lisa

chemistry step for step thank a lot
10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of cac03. The answer 1000 I think ppm= 1mg/1L 10L x 100g/mol cac03 = 1000 Who check it for me step by step Thank all tutors for your help. How many ml of a 0.05M kmno4 solution are ...
July 5, 2014 by ken

chem
A calorimeter contains 16.0ml of water at 15.0degrees celsius. When 1.60g of X(a substance with a molar mass of 46.0g/mol) is added, it dissolves via the reaction X(s)+H20(l)->X(aq) and the temperature of the solution increases to 25.0degrees celsius. Calculate the enthalpy...
October 8, 2008 by tomi

CHEM
I was just wondering if someone would be able to critique my answers for the following Chem questions? they range from pretty basic to a bit more... 2)which of the following is the definition of the value of Avogadro's constant: b) the # of Carbon atoms in exactly 12g of ...
October 21, 2007 by K

communication
organized the body of her presentation with the following ideas: First major section - drunk driving accidents have increased between the hours of 2AM and 5AM in Oak Cliff. Second major section - the City of Dallas should increase police protection outside Oak Cliff ...
February 11, 2012 by Anonymous

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