1. chem

    A solution of ammonia and water contains 3.80×1025 water molecules and 5.80×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

    asked by todd on January 21, 2015
  2. Chemistry 1201

    A solution of ammonia and water contains 1.00×1025 water molecules and 5.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

    asked by Brittany on March 28, 2012
  3. English

    Thank you very much. I need you to check these sentences. 1) My father took a day off work (not a day off from work) to take me to the seaside. 2) They took 20% off (not "from") the list price. 3) He let the students off with an warning. He let off the

    asked by Matthew on March 22, 2012
  4. thermal heat

    Consider the following. (a) Find the work done by an ideal gas as it expands from point A to point B along the path shown in the figure. MJ (b) How much work is done by the gas if it compressed from B to A along the same path? MJ

    asked by Annette on April 29, 2013
  5. math

    Jared is scheduled to work for mc008-1.jpg of an hour at the school fair. He has already worked mc008-2.jpg of an hour. How much longer does he have to work?

    asked by jared on January 22, 2017
  6. Math 1 tiny question

    I posted this question a couple days ago and I also got help but I have one more question , so is the final answer to the question below: 30 downloads would make site A a better deal. No more than 30 and no less or is it equal to 30 and more or equal to 30

    asked by Rihanna on June 3, 2013
  7. Chemistry

    I had to perform an experiment for rate of reaction. The point of the experiment was to show how changes in reactant concentration, temperature, and catalyst presence can affect the rate of a reaction. The reaction that we studied was H2O2 + 2I^- + 2H^+ ->

    asked by Hannah on February 25, 2012
  8. Chemistry

    The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90°C/m)? I worked this problem for someone just a couple of days ago. delta T = kf m kf = 4.90 m =

    asked by Kelly on January 24, 2007
  9. Physics

    Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an

    asked by Anonymous on December 15, 2014
  10. Law

    It is important for legal assistants to understand how to __________ like a professional. (Points: 5) a.behave, work, and dress b.move, dress, drive c.drive, shop, behave d.dress, sing, work

    asked by tobby on October 12, 2011
  11. math

    Carl hired 6 people to work in his shipping department for a week at 12 hours a day. However, after working only 6 hours on the third day, the work was completed. How many hours of wages does Carl owe to the workers?

    asked by jyoti on March 7, 2011
  12. Math

    Carl hired 4 people to work in his shipping department for a week at 8 hours a day. However, after working only 4 hours on the third day, the work was completed. How many hours of wages does Carl owe to the workers?

    asked by Oliver on June 7, 2012
  13. math

    tisha works 5 days a week as a paramedic. she has 10 holidays off and 3 weeks vacation every year. if tisha never misdes a regular day of work, how many days does she work in each year that is not a leap year?

    asked by mi on September 1, 2010
  14. Science

    A water pump produces 9kl of water per hour at height of 70m above the pump. The pump is driven by 3kW electric motor calculate 1.the work done per hour. 2.the work done per minute.

    asked by Jady on July 2, 2019
  15. math

    I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add ((r+10)/r)+(r/(r+10)) 6.) divide

    asked by jen on March 10, 2010
  16. Social Studies(my Thesis Check this please)

    Child Labor refers to the employment of children at regular and sustained labor. Have your ever wondered what it actually means other than making kids work. It mean to make children work at regular and unstained labor.

    asked by JEAN on April 21, 2011
  17. cja304

    What role does listening play in oral communication within the criminal justice system? How do the various types of listening play a role in effective communication? Compare and contrast the most important listening types and why they are important in the

    asked by sam on March 7, 2011
  18. PHYSICS

    How do I solve this? Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.6 kg and an initial velocity of nu Overscript

    asked by KS on April 26, 2015
  19. Math

    Express each statement using an inequality involving absolute value.Do not solve. 1.The majority of grades in Sean's English class are within 4 points of 85. 2.AA thermometer is guaranteed to give a temperature no more than 1.2F from the actual

    asked by Shadow on March 17, 2010
  20. Math

    Express each statement using an inequality involving absolute value.Do not solve. 1.The majority of grades in Sean's English class are within 4 points of 85. 2.AA thermometer is guaranteed to give a temperature no more than 1.2F from the actual

    asked by Shadow on March 18, 2010
  21. CUC

    1.Two masses of 4gm and 6gm respectively are attached to the ends of a light rod of negligible mass and the rod rotates anticlockwise at the rate of 2rev/sec about an axis passing through the center of mass and perpendicular to its length. Calculate (a)the

    asked by Theresa on May 26, 2012
  22. Physics

    A 0.40kg block is held against a compressed spring of stiffness 68.2N/m and compression 0.64m parallel to a 24 degree incline that is 1.27m long. The coefficient of kinetic friction between the block and the incline is 0.34. The external force holding the

    asked by Alphonse on October 18, 2012
  23. differential equations

    Suppose the fraction of a cohort of aids patients that survives a time t after aids diagnosis is given by S(t) = exp(-kt). show that the average survival time Taver after aids diagnosis for a member of this cohort is given by Taver= 1/k. show every steps

    asked by fatih elmali on September 24, 2012
  24. Math

    Can someone help me reword these two things? I don't like how I did them but I can't think of anything else. Thanks!! 1. PROMPT: What do you do to check whether a number is rational or irrational? In your explanation, use an example of an irrational and a

    asked by cAt.ExE HaS sTopPeD wORkInG on September 25, 2018
  25. Analytical Chemistry

    5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL, 0.5mL, 1mL, 1.5mL, 2mL, and 2.5L. The excitation

    asked by Katy on May 8, 2015
  26. History

    1. Which of the following was NOT a factor in the decline of Buddhism in India? A. Hinduism’s increasing appeal B. Buddhism’s reinforcement of the Indian caste system C. Hinduism’s increasing religious ardor D. The growing attractiveness of bhakti to

    asked by Any on January 25, 2014
  27. physics

    In which of these cases is a youngster doing work in the school gymnasium? 1. climbing up a rope 2. hanging motionless from a chinning bar. 3. lifting a set of weights from the floor to overhead WHICH ONE & WHY? A BRIEF EXPLANATION WOULD BE NICE. thank you

    asked by maria on January 14, 2007
  28. pleasse check social studies

    The type of jurisdiction to consider the decisions of lower courts is known as _______________. (1 point) appellate original limited juvenile*** 2. Which of the following courts would hold jurisdiction over the violation of a parking ordinance in Atlanta?

    asked by XenaGonzalez on February 23, 2015
  29. physics - so important

    In which of these cases is a youngster doing work in the school gymnasium? climbing up a rope lifting a set of weights from the floor to overhead PLEASE HELP ME? i NEED TO KNOW THiS FOR A TEST TOMORROW iN PHYSiCS & i CANT SEEM TO FiND THE ANSWER ANYWHERE &

    asked by maria on January 15, 2007
  30. Chemistry

    Re: Qualitative analysis - group 1 cations lab What single reagent could you add that would allow you to differentiate between the members of each pair of solid compounds below? Tell what happens to each substance when the reagent is added and show a

    asked by John on October 1, 2017
  31. statistics/please check calculations

    questions reads as follows: sat scores around the nation tends to have a mean score around 500, a standard deviation of 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank within

    asked by mary on October 16, 2010
  32. physics

    A 50-kg box is being pushed a distance of 7.1 m across the floor by a force whose magnitude is 175 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.19. Determine the work done on the box by each of the four

    asked by Anonymous on March 11, 2014
  33. soc 120

    This is a reason an employer might restrict employee Internet access: (Points : 1) Employees waste too much time on the Internet. Viewing certain kinds of sites could lead to a hostile work environment. An employer can guarantee Internet access is

    asked by bob johnson on July 1, 2012
  34. Math

    I have another problem that I don't know how to solve. A car travels along a straight road, heading east for 1 hour, then traveling 30 minutes on another road that leads northeast. If the car had maintained a constant speed of 40 mph, how far is it from

    asked by Cassie on January 16, 2014
  35. Chemistry Lab

    A 15.00 mL sample of a weak acid with Ka = 3.52x10-4, was titrated with 0.475 M KOH. The equivalence point was reached after addition of 19.5 mL of KOH with the phenolphthalein indicator. Determine the molar concentration of the original acid solution,

    asked by Erin Lee on October 30, 2012
  36. Chemistry

    Calculate the molarity of a solution made by adding 28.2 mL of concentrated ammonia (28.0 % by mass, density 0.880 g/mL) to some water in a volumetric flask, then adding water to the mark to make exactly 500 mL of solution. (It is important to add

    asked by Sarah on October 7, 2013
  37. Chemistry II

    Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity

    asked by Mandy on September 27, 2009
  38. US History

    17. Which of the following was designed to ensure that the President would not gain dictatorial powers over government? a. the system of checks and balances b. the Elastic Clause c. the Electoral College d. the Cabinet System of checks and balances gave

    asked by mysterychicken on September 30, 2010
  39. astronomy

    i want to know the new moon formula .what is the method to calculate the timing of new moon or dark moon?i hope that you will help me .

    asked by shahzad on December 14, 2011
  40. Science

    what are some scientific experiments ideas My teacher told me I could do a scientific experiment following the scientific method.

    asked by June on November 25, 2015
  41. chemistry

    A chemistry student weighs out 0.172 grams of acrylic acid (HCH2CHCO2) into a volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800 moles/liter NaOH solution. Calculate the volume of NaOH solution the

    asked by Lucas on January 25, 2012
  42. CHEMISTRY 2

    A 56.0mL sample of a 0.102 M potassium sulfate solution is mixed with 34.7mL of a 0.114 M lead acetate solution and this precipitation reaction occurs: K2SO4(aq)+Pb(C2H3O2)2(aq)→PbSO4(s)+2KC2H3O2(aq) The solid PbSO4 is collected, dried, and found to have

    asked by Run on October 6, 2014
  43. maths, proportion

    twelve men take 6 hours to finish a piece of work. after the 12 men have worked for 1 hour, the contractor decides to call in 8 more men to complete the remaining work. how many more hours would the 20 men take to complete the remaining piece of work? is

    asked by minerva on February 24, 2007
  44. Computer - Excel Mail Merge

    I have a problem when doing the mail merge with Office 2003. First of all, I wrote a letter in Word 2003 and then try to merge some data from Excel 2003. The data in Excel column was listed as below: A1=101 A2=123 A3=134 A4=148A A5=181B Problem: The data

    asked by Lamp on July 4, 2008
  45. Writing

    Please grade this and make corrections. ACT writing prompt: The Children's Internet Protection ACT (CIPA) requires all school libraries receiving certain federal funds to install and use blocking software to prevent students from viewing material

    asked by Anonymous on July 31, 2013
  46. physics

    I had wrote that was because I was told that in the beginning of the spring being wound the PE=KE. Can I check a concept question, The amount of work required to stop a moving object would be equal to the mass of the object times it intial speed due to

    asked by tatiana on November 5, 2006
  47. SAT Essay

    Assignment: Should people take more responsibility for solving problems that affects their communities or the nation in general? Plan and write an essay in which you develop your point of view in this issue. Support your problems with reasoning and

    asked by Sanya on October 30, 2012
  48. math

    Factorial notation problem. Please help? Hi, I am stuck on this maths problem. Solve for n: (n+2)!/(n)! =110. I get as far as (n+2)(n+1) = 110. When I multiply it out I get n^2,3n,2 = 110. There is only one example similar to this in my book and it used a

    asked by Maria on July 3, 2013
  49. English

    1. I got a C- on the math test. Reading: C - : C minus (right?) 2. The math problems are difficult to solve. 3. The math questions are difficult to solve. ------ Are both OK?

    asked by rfvv on June 21, 2014
  50. 5th grade math

    Which answer shows data with a range of 49? A. 45,69,92,59 B. 95,59,52,89 C.99,66,51,52 D.55,99,78,50 if you select one of the answer .How do you solve the problem.? i was wonder how ?please explain your answer please!! so the next problem i try to solve

    asked by pat on February 9, 2011
  51. One more 5th grade adding letter problem

    I thought I was getting the hang of these but I'm stumped on this one too. Any advise on how to solve it? s e e d + i c e d ---------- s p i c e c= ___ d=___ e=___ i= ___ p= ___ s=___ Hint: Solve for s and i. Then is e is even or odd? Thanks.

    asked by Rich A on October 10, 2008
  52. math

    Is it possible to mix a 10% sugar solution with a 20% sugar solution to get a 30% sugar solution?

    asked by jessica on January 15, 2009
  53. Chem

    Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

    asked by Deb on August 2, 2013
  54. Chem

    Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

    asked by Michele on July 31, 2013
  55. Chemistry - Science (Dr. Bob222)

    Posted by Ana on Saturday, May 3, 2014 at 11:23am. A zinc-copper battery is constructed as follows (standard reduction potentials given below): Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M) | Cu Zn2+ + 2 e- → Zn(s) Eº = -0.76 V Cu2+ + 2 e- → Cu(s) Eº = 0.34 V

    asked by Ana on May 5, 2014
  56. English

    1. You have to solve the English problems in your own way. 2. You have to solve the English problems on your own. 3. You have to solve the English problems for yourself. 4. You have to solve the English problems by yourself. (Are they all grammatical? What

    asked by John on March 19, 2009
  57. English

    1. You have to solve the English problems in your own way. 2. You have to solve the English problems on your own. 3. You have to solve the English problems for yourself. 4. You have to solve the English problems by yourself. (Are they all grammatical? What

    asked by John on March 19, 2009
  58. programming(visual basic)

    debugging exercise: Private Sub btnItemNumber_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnItemNumber.Click Dim decCost As Decimal Dim intCount As Decimal decCost = Convert.ToDecimal(txtCost.Text) Inventory(decCost,

    asked by Sean on January 8, 2014
  59. Visual Basic

    debugging exercise: Private Sub btnItemNumber_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnItemNumber.Click Dim decCost As Decimal Dim intCount As Decimal decCost = Convert.ToDecimal(txtCost.Text) Inventory(decCost,

    asked by Kevin on December 3, 2014
  60. math PLEASE HELP

    26. a. Show that the ratios Start Fraction 10 over 20 End Fraction and Start Fraction 30 over 60 End Fraction form a proportion by finding a common multiplier. b. Show that the ratios in part (a) are equal by writing them in simplest form.

    asked by Evie on December 15, 2017
  61. chemistry

    A solution is prepared by mixing 0.0400 mol CH2Cl2 and 0.0800 mol CH2Br2 at 25 degrees C. Assume solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25 C. At 25 C, vaporpressure of pure CH2Cl2 and pure CH2Br2 are 133

    asked by Sara on March 7, 2010
  62. math

    y′=(2y+x)/x, y(1)=4 1. The resulting differential equation in x and u can be written as xu'=------ 2.Separating variables we arrive at -----du= dx/x 3.Integrating both sides and simplifying, the solution can be written in the form u+1=Cf(x) where C is an

    asked by Leahv on February 29, 2016
  63. Chemistry

    A student mixes 100.0 mL of 0.300 mol/L silver nitrate solution with 100.0 mL of 0.300 mol/L calcium chloride solution. a) Determine the theoretical yield of the precipitate. b) If the actual mass of precipitate is 4.00g, calculate the percent error of

    asked by Rebekah on January 8, 2011
  64. chemistry

    Cocaine is a weak base (Figure see below) with pKb = 5.59. Cocaine has local anesthetic effect (local anesthetic) but is also a narcotic.   a) Calculate the ratio of the concentration of cocaine and its conjugated acid in a solution which has. pH = 7.40

    asked by Maria on September 9, 2016
  65. Chemistry

    A student mixes 100.0 mL of 0.300 mol/L silver nitrate solution with 100.0 mL of 0.300 mol/L calcium chloride solution. a) Determine the theoretical yield of the precipitate. b) If the actual mass of precipitate is 4.00g, calculate the percent error of

    asked by Rebekah on January 8, 2011
  66. AP Chemistry

    How can you find the average temperature of a refrigerator or any fridge by using colligative properties?? I am doing a lab in school and i'm not sure how to approach or start this. I know that you have to have two solutions where on one solution, you put

    asked by Sarah on December 30, 2012
  67. ap chemistry

    glycerin C3H8O is a nonvolatile liquid. what is the vapor pressure of a solution made by adding 164 g of glycerin to 338 mL of H2O at 39.8C. The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3 P solution= X solvent p

    asked by Nelson on January 11, 2015
  68. Accounting

    pierce co has a june 30 fiscal year end. it estimated its annual property taxes to be 24000 based on last year's property tax bill and have accrued 2000 of property tax each month to marcher 31. its actual property tax assessment, received on april 30 is

    asked by Luc on May 14, 2008
  69. Physics

    You attach one end of a spring with a force constant k = 893 N/m to a wall and the other end to a mass m = 2.02 kg and set the mass-spring system into oscillation on a horizontal frictionless surface as shown in the figure. To put the system into

    asked by Kristin on April 22, 2015
  70. physics

    A skier of mass 70kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8m/s^2. How much work is required to pull him 60m up a 30.7º slope (frictionless) at a constant speed of 3 m/s? answer in units of kJ. In this question, I

    asked by puff puff on September 17, 2006
  71. Math

    Ms.abbot went on a road trip. The trip was 792 miles and the average price of gasoline was $1.30 per gallon. What information is needed to to find the amount spent on gasoline for the trip? A. Number of hours the trip took B. Number of miles per hour the

    asked by Mathisthebest on April 13, 2011
  72. Chemistry

    In the reaction: P4 (S) +Cl2 (g)PCl5(s), 1. If you have 10.00 grams of Phosphorus to react with 220 grams of Chlorine gas, what would be the theoretical yield of PCl5(s), in grams? 2. Why was there condensation of the beaker of cold water when a blue

    asked by Jerome on December 4, 2010
  73. Middle school digital art and design question

    Hi! So, I need to check just a few MS digital art and design questions (If thats Ok) 1) Which of the following is true of Vincent van gogh A) He was a wealthy artist*** B) Very few people study his work today C) He choose very traditional methods of

    asked by Elizabeth on January 17, 2018
  74. chemistry

    A solution was made by dissolving 62.07 grams of a compound in 500.0 g of water. The compound was not ionic. The freezing point of the solution was measured and found to be – 1.86oC. Using the Kf value in your textbook , the molar mass of this compound

    asked by Anna King on February 3, 2012
  75. Calc Help

    demand = (p+1)sqroot(q+1)=1000. Find elasticity of demand at a price of $39 per unit. I am really struggling with this problem is there anyone that can help me? i am not familiar with the terminology, but if you are trying to solve for p, it is not that

    asked by Rob on April 29, 2007
  76. As Physics

    Use the equations below: P=mv Ek=1/2mv^2 1) During a docking manoeuvre, a supply pod of mass 4000kg accidentally collides with a small space station of mass 100,000 kg, at a relative velocity of 2.00ms-1. The pod attaches to the station. You can assume

    asked by cake on November 30, 2017
  77. U.S. History

    please tell me if these are right or not. my choice are in CAPS 1. the Antifederalists opposed the Costitution becasue they thought it a. gave the federal government too much power B. PROVIDED NO WAY TO CHANGE THE CONSTITUTION c. gave the state governments

    asked by y912f on January 24, 2009
  78. chemistry- Thank you

    Suppose you add 81 ml of dilute acid to 54 ml of water. Both the water and acid were at room temperature (22 C) before being mixed. The temperature of the solution increased to 42 C. How much energy (in kJ) was released by the dissolution of the acid if

    asked by Jazmin on October 17, 2010
  79. math problem-

    Bacteria grow in a nutrient solution at a rate proportional to the amount present. Initially, there are 250 strands of the bacteria in the solution which grows to 800 strands after seven hours. Find the time needed for the bacteria to grow to 1600 strands.

    asked by gwapa on May 12, 2012
  80. Chemistry

    What are the equilibrium concentrations of all the solute species in a 0.95 M solution of hydrogen cyanide, HCN? The Ka value = 6.2 x 10^-10. (a) [H3O+], M; (b) [OH-], M; (c) [HCN], M; (d) What is the pH of the solution? For HCN So far i have calculated

    asked by Alice on August 14, 2016
  81. Chemistry

    the equation of the line for a graph of voltage versus log[Cu2+] was y= - 0.0179x - 0.0015. The voltage of a solution with an unknown [Cu2+] was measured against the same reference cell, under the same conditions; the voltage was found to be 0.012 V.

    asked by Daniel on June 14, 2011
  82. Chemistry

    The equation of the line for a graph of voltage versus log[Cu2+] was y= - 0.0179x - 0.0015. The voltage of a solution with an unknown [Cu2+] was measured against the same reference cell, under the same conditions; the voltage was found to be 0.012 V.

    asked by Max on June 15, 2011
  83. Biostats

    What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).

    asked by Mary on December 4, 2012
  84. MIS Nooona MBA

    1- I need some ways the company use data on computers before discarding them ? 2- I want three programs that can destroy data on hard disk ? 3- Which method or program is the best for destroying data so that no body can recover it ?

    asked by hanaa on November 30, 2012
  85. 3rd grade

    How do we answer this question...the flower shop just received a shipment of 432 roses. they need to fill an order for 273 roses. use any method to estimate how many roses they will have left.

    asked by Alexis on September 23, 2010
  86. biostat

    What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).

    asked by nkem on August 17, 2013
  87. English

    1. What did Bora want to do? - She wanted to do volunteer work. 2. Where do her friends usually volunteer? - They usually volunteer at libraries or town halls. 3. Did Bora want to volunteer at a library or a town hall? - No, she didn't. 4. Who told Bora

    asked by rfvv on October 11, 2010
  88. College Chemistry

    My professor gave us two homework questions that are a bit confusing, can you help me to get started on them. 1) You have 6g of water (Kf=1.86 C kg/mol). You add and dissolve 2.1 g of a different unknown substance. The freezing point of the solution is

    asked by Sarah on May 17, 2010
  89. algebra 2 help please/check

    The first 3 terms in a geometric sequence are 1.1, 1.65, and 2.475. Part A: What is the sum of the first 6 terms of the sequence? Show your work. Part B: How does the sum of the seriesy differ from the 6th term? Explain. Part C: If the nth term in this

    asked by jenny on May 20, 2012
  90. Chemistry

    Calculate the molarity of the H2SO4 solution if 17.45 mL of NaOH was necessary to reach the endpoint of titration. The molarity of the NaOH solution was 0.425 M and 26.30 mL of H2SO4 was added to the Erlenmeyer flask. H2SO4(aq) + 2 NaOH (aq) -----> Na2SO4

    asked by Audrey on February 25, 2017
  91. chemistry

    A sample of aluminum sulfate 18-hydrate, Al2(SO4)3 · 18 H2O, containing 157.0 mg is dissolved in 1.000 L of solution. Calculate (a) molarity of Al2(SO4)3 (b) molarity of SO42- (c) molality of Al2(SO4)3, assuming that the density of the solution is 1.00

    asked by Corinthia on September 20, 2011
  92. MATH PLEASEEEEE

    A)If a license plate consists of 2 letters followed by 3 digits or 3 letters followed by 2 digits, how many license plates can be created? B)You are given an exam with only 9 questions. if each question has 4 choices, howmany different possible answers can

    asked by Kennedy on January 18, 2009
  93. CHEMISTRY plz help

    In the accompanying chart are appropriate vapor pressures for benzene and toluene at various temperatures: Temp (C) mmHg Temp (C) mmHg Benzene 30 120 Toluene 30 37 40 180 40 60 50 270 50 95 60 390 60 140 70 550 70 200 80 760 80 290 90 1010 90 405 100 1340

    asked by Aishwarya on October 17, 2013
  94. math/set theory

    120 quilts were entered into a quilt show. (Traditionally, all quilts were hand stitched but now many are stitched on machines. Appliques are additional pieces of cloth that are sewn on top of the quilt.) In this show, 86 were machine stitched. 44 had

    asked by alan on November 13, 2014
  95. english

    Revise the following paragraph, improving it without changing its overall meaning. Pay particular attention to the sentence structure and parts of speech. Imagine a time when there was only one little store. To shop in for a whole town. The only selection

    asked by angel on August 30, 2015
  96. Math

    Can you please check my answers, thank you #2. 5/y+4 + 11/y^2=y-12 = 7/y-3 Answer -2 #4 The length of a rectangle is 2 cm more than twice its width. If the perimeter of the rectangle is 40 cm, find the length of the rectangle. A. 6 cm B. 9 cm C. 11 cm D.

    asked by Ron on August 26, 2012
  97. Chemistry

    Calculate the volume of 1.00 M acetic acid solution and mass of sodium acetate needed to make 250 mL of a 0.450 M acetic acid/acetate buffer solution with a pH of 4.00. (The pKa is 4.74 for acetic acid) *Please explain it in detail, don't leave a step out!

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  98. Chemistry!!!

    Consider a solution that is 0.022 M in Fe2+ and 0.014 M in Mg+2. A). If potassium carbonate is used to selectively precipitate one of the cations while leaving the other on solution, which cation will precipitate first? What minimum concentration of K2CO3

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  99. 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

    asked by Melissa on July 18, 2008
  100. Precalculus

    Hello, An Aircraft carrier can travel 450km in the same time a container ship travels 300km. If the aircraft carrier was traveling 5km/h faster what was the speed of the container ship? I don't need help answering the actual question, I have a pretty

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