1. chemistry

    In industry, sodium carbonate is produced in two stages whose equations are as follows: NaCl + NH3 + H2O + CO2 à NH4Cl + NaHCO3 2NaHCO3 + heat à Na2CO3 + CO2 + H2O a) What’s the mass of sodium carbonate that can be produced from 1.0 t of sodium

    asked by paula on May 26, 2010
  2. Math

    90% of students at a university use a backpack, while the rest do not. Of all the students, 50% carry their laptops with them and 5% carry neither a backpack nor laptop. What percentage of students carry their laptops and use a backpack?

    asked by Galo on August 19, 2017
  3. Maths

    There are 20 questions in a test. Faye answers 17 correctly. a. What fraction of questions does faye answer correctly? b. What percentage of the questions does Faye answer correctly?

    asked by Joe on January 14, 2016
  4. science

    if i had mixture of sodium carbonate and sand, and spilled some sodium carbonate (no sand spilled) after weighing the mixture, would the spill affect the percentage of sand or sodium carbonate when we calculate it?

    asked by chriss on February 17, 2011
  5. chemistry

    a 111.4mg ore sample containing iro with acid , filtered and diluted to 200.0ml in volumetric flask. a 1000ml aliquot is transferred to a 100.ooml volumetric flask containing hrdroxylamine hydrochloride, sodium acetate and 1,10- phenanthroline and diluted

    asked by grey on November 6, 2014
  6. Math

    Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react w/ nitrogen to produce radioactive carbon-14. Radioactive carbon-14 enters all living tissue through carbon dioxide. As long as it is alive, carbon-14 is maintained in the

    asked by John on April 10, 2017
  7. History

    Which of the following is important when a primary scheduled as heavily front-loaded as it was in 2008? A. A clear stance on the issues B. The ability to raise money C. A comprehensive general election strategy D. A steady, slow building following with the

    asked by Sami on November 2, 2016
  8. physics

    jack measured that his racquet gives a squash ball 45.0J of kinetic energy when he hits it with a particilar shot.he also measures that it has 18.0J of kinetic energy after one bounce off the court wall. what percentage of its mechanical energy does the

    asked by Emma on May 8, 2007
  9. AP Chemistry

    A 2.5 gram sample of a hydrocarbon containing C, H, N, O is combusted in excess oxygen. The nitrogen compounds that are formed are treated to convert all of N to N2. The gases are passed through a CaCl2 drying tube which weighs 1.00 gram initially and 3.16

    asked by Kim on April 24, 2011
  10. math

    Statistics. The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA and converting

    asked by gertrude on October 8, 2008
  11. English

    Question 12 Which of the following is correct? i.e. I.E. ie IE Question 13 Which of the following is incorrect? 16,500 four dollars in his 30s the nineteenth century Question 14 Which of the following is the correct usage of a percentage? 13 percent 13%

    asked by christopher on April 26, 2010
  12. macroeconomics

    GDP rises from $4 trillion in 2006, the base year, to $5 trillion in 2012. The GDP deflator in 2012 is 120. Find real GDP in 2012. Find the percentage increase in real GDP between 2006 and 2012.

    asked by mary on February 26, 2015
  13. Grade 12 Chem

    For each of the following, write the chemical equation with appropriate equilibrium arrows, as shown in Table 5. Table 5: No reaction: 99%↔ or ➡️ a) The Haber process is used to manufacture ammonia fertilizer from hydrogen and nitrogen gases. Under

    asked by Avery on January 9, 2016
  14. Grade 12 Chem

    For each of the following, write the chemical equation with appropriate equilibrium arrows, as shown in Table 5. Table 5: No reaction: 99%↔ or ➡️ a) The Haber process is used to manufacture ammonia fertilizer from hydrogen and nitrogen gases. Under

    asked by Avery on January 9, 2016
  15. Intro Chemistry

    If a sample of BaSO3 is found to contain 1.73 · 1018 SO32- ions how many moles of Ba2+ ions are present? Express your answer in scientific notation. The following information is given: Molar Mass (g/mol) BaSO3 217.39 Ba2+ ion 137.33 SO32- ion 80.063

    asked by echem on March 14, 2010
  16. ss

    The PJC department of McIntyre Company shows gross sales of $730,600 for computer supplies and $934,900 for general office supplies. It has determined that computer supplies cost $534,000 and that general office supplies cost $391,400. What is the gross

    asked by ss on June 6, 2016
  17. Math

    How do I do this? -- can anyone give me a formula to find the answers? Example: Find the annual rate of simple interest~ P: 5000 / I: 650 / T: 3 years. PV = nRT I=PRT so solving for R we get R=I/(PT) plug in your values and evaluate. Your answer will be a

    asked by Finding Interest Rate in Interest Problems on April 25, 2007
  18. CHEMISTRY..

    1. Will a precipitate form if solutions of potassium sulfate and barium nitrate are combined? If so, write the net ionic equation for the reaction. 2. Will a precipitate form if solutions of potassium nitrate and magnesium sulfate are combined? If so,

    asked by Anonymous on October 17, 2013
  19. Physics/ Chemistry please help

    The active ingredient in the allergy medication Claritin contains carbon (C), hydrogen (H), chlorine (Cl), nitrogen (N), and oxygen (O). Its molecular formula is C22H23ClN2O2. The standard adult dosage utilizes 1.480 1019 molecules of this species.

    asked by Mary on April 15, 2007
  20. Plz Help Physics

    We know that the negative charge on the electron and the positive charge on the proton are equal. Suppose, however, that these magnitudes differ from each other by 0.00011%. With what force would two copper pennies, placed 1.4 m apart, repel each other?

    asked by Lauren on February 5, 2007
  21. General Math

    I am so confused can anyone help me understand which one is correct and why.... Beta is estimated as the slope of a regression line fit to pairs of periodic returns, (rx, ry), where: rx is the return for a market index such as the S&P 500 Index. rx is the

    asked by Alisha on July 21, 2013
  22. Health

    1. What is one reason why the percentage of overweight teens has increased over the past 50 years? A. Teenagers spend a lot more time outside. B. Television commercials promote healthy food. C. There is more junk food and fast food available. D. People

    asked by Jake Paul in the title on January 8, 2018
  23. Stats

    This is the question: Let's propose a hypothetical situation where you plan to apply your newly acquired analytical skills to the end of the baseball season. The Dodgers most recent win percentage is 0.569. Assume that the team that they are playing and

    asked by Kleena on September 30, 2016
  24. Math

    I. Memorandum D. Explain the tax effect based on providing $180,000 per year for the client’s salary and $70,000 per year for his daughter’s salary if they withdraw cash from the business or pay dividends as appropriate. E. Justify the percentage of

    asked by Anonymous on April 3, 2016
  25. Finance

    I. Memorandum D. Explain the tax effect based on providing $180,000 per year for the client’s salary and $70,000 per year for his daughter’s salary if they withdraw cash from the business or pay dividends as appropriate. E. Justify the percentage of

    asked by Anonymous on April 3, 2016
  26. Chemistry

    When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K ? b) What amount

    asked by Sandy on December 13, 2012
  27. chemistry

    My chem book gives me the following Hess' Law example: Mg + 2HCl --> H2 MgCl2 Delta H1 MgO +2HCl --> H2O +MgCl2 Delta H2 H2 + 1/2 O2 --> H2O Delta H3=-68.3kcal The desired reaction is the formation reaction of MgO as follows: MgS +1/2 O2 --> MgO Delta H

    asked by marcus on December 7, 2012
  28. World Geography

    REVIEW 1.Which of the following statements about the natural resources of the United States is most accurate? A. The many agricultural resources of the United States have made up for its lack of other resources.

    asked by bre on April 5, 2013
  29. college statistics

    the average length of time required for students to complete a test in a an introductory statistics course is found to be 50 minutes with a standard deviation of 12 minutes. if students are allowed 80 minutes to complete the test , approximately what

    asked by Chelsea on November 6, 2014
  30. Statistics

    A number of people were asked how many days they would wait to seek medical treatment if they were suffering pain that interfered with their ability to work. The results are presented in the following table. Number of days: 0 , 1 , 2 , 3 , 4 , 5 Frequency:

    asked by Obi on October 2, 2015
  31. math

    Fariza gave .3 of her flowers to her sister, 4/7 of the remainder to her brother. Fariza remained with 45 flowers. a) Calculate the percentage of flowers Fariza kept for herself. b) How many flowers Fariza had at the begining? c) Calculate how many more

    asked by indira on December 15, 2016
  32. Physics

    What is the force of gravity at 220 miles above Earth's surface? Calculate how much of a g force the astronauts are actually experiencing. The solution for this math problem is a percentage. You can calculate it using the Algebraic equation: gr = R2/r2 x g

    asked by John on January 22, 2011
  33. math

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by vipul on June 29, 2016
  34. math help

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by vipul on June 30, 2016
  35. aptitude

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by pk on July 10, 2017
  36. quantitative methods

    21. The Seneca Children’s Fund (SFC) is a local charity that runs a summer camp for disadvantaged children. The fund’s board of directors has been working very hard over recent years to decrease the amount of overhead expenses; a major factor is how

    asked by Karen on November 16, 2012
  37. maths

    the blood alcohol concentration(BAC)in the uk is 0.08%. A well known formula for calculating BAC percentage is widmarks formula BAC%=5.14A/rW -0.015H Where A is the total alcohol consumed in ounces, W is the body weight in pounds, r isthe alcohol

    asked by susan on April 12, 2014
  38. Math

    Statistics. The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA and converting

    asked by Amanda on October 15, 2008
  39. Statistics

    The percentage of various colors are different for the "peanut" variety of M&M's candies, as reported on the Mars, Incorporated website. Brown: 12% Yellow: 15% Red: 12% Blue: 23% Orange: 23% Green: 15% A 14-ounce bag of peanut M&M's is randomly selected

    asked by Elaine on March 29, 2015
  40. Chemistry;HELP

    Volume Problems Answer the following questions. Scan and upload your questions and answers to your student section labeled Volume Volume Problems. Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone

    asked by Unknown on August 21, 2013
  41. Econ

    given the following information, calculate nominal GDP, real GDP, and the percentage increase in year two. Be sure to label the answers. Describe what is taking place in the economy. In the base year, 10 new cars were sold at $7,000 each, 20 new office

    asked by Abby on January 24, 2017
  42. economics

    given the following information, calculate nominal GDP, real GDP, and the percentage increase in year two. Be sure to label the answers. Describe what is taking place in the economy. In the base year, 10 new cars were sold at $7,000 each, 20 new office

    asked by A on January 25, 2017
  43. Statistics

    An instructor for a college biology lab has each of her 12 students (you are one of those 12 students) take their own SRS of 25 plants from an experimental field. She lets you know that the heights (measured in cm) of the plants in the field follow a

    asked by BadatStat on July 12, 2012
  44. Maths

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by Vipul on September 27, 2018
  45. percentage

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by hiren on September 29, 2016
  46. math help me out

    A salesman has to choose between two schemes of remuneration.The first scheme has a fixed salary of rs 3700 and a commission of 2% on sales above rs 50000. The second scheme has no salary but offer commission only. The commission starting from 3% of sales

    asked by vipul on August 5, 2016
  47. chemistry

    sorry the first one didn't post properly Lab: Electrolytic Cells The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II) chloride solution (3.25 M)

    asked by anna on April 15, 2008
  48. Maths

    Jason’s credit card’s beginning unpaid balance for August is $2,000. During the August billing cycle he made a payment of $200 and used card to purchase $50 worth of grocery. Credit card charges 24% annual percentage rate and uses the unpaid balance

    asked by Prince on September 20, 2011
  49. math

    Seven students took a quiz. Four of these students received a score above 85 percent. Students who received at least an 85 percent got a sticker. What percent of the students (rounded to the nearest full percentage number) received a sticker? A. 59 percent

    asked by Buster on December 10, 2012
  50. newspaper & t.v. political race-- question

    Newspaper and television coverage of a political race: A. Usually has the greatest influence over the outcome of a primary election. B. Usually has the greatest influence over the outcome of a general election. C. Usually influences the outcomes of primary

    asked by Calinda on January 22, 2007
  51. economics

    If someone could help me with this question, that would really help. I'm just not sure what the formula would be? Suppose a market basket of goods and services includes the goods for two successive years. According to the table, between the years 2012 and

    asked by phoebe on February 9, 2015
  52. math

    IF 81 PEOPLE NEED TO TAKE A TEST, BUT ONLY 13 HAVE ACTUALLY TAKEN TEST, WHAT IS THE PERCENTAGE OF PEOPLE WHO HAVE TAKEN TEST?

    asked by donna on January 30, 2013
  53. Chemistry

    A 0.750 g sample of an unknown solid is dissolved in 100 mL of water and acidfied with 25 mL of 3 M H2SO4 then titrated with a 0.0200 M KMnO4 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium

    asked by Aaron on April 9, 2013
  54. Chemistry

    If I added sodium carbonate to magnesium nitrate, would it be insoluble & a precipitate forms? If I added sodium carbonate to calcium nitrate, would it be insoluble & precipitate forms? Adding sodium carbonate to strontium nitrate: insoluble, precipitate

    asked by Anonymous on December 3, 2008
  55. Math

    There are two alloys consisting of zinc, copper and tin. The first alloy contains 25% zinc and the second alloy contains 50% copper. The percentage of tin in the first alloy is twice that in the second alloy. 200 kg of the first alloy and 300 kg of the

    asked by Tamasa on June 19, 2016
  56. Biology

    Iwas woudnering if you could help me with this problem. The answer key says that the answer is D and I have no idea why. The chart, included in the link, reads off a value of about .5 for the G locus for the year 1980 Finding the percent heterozygous

    asked by Kate on July 4, 2010
  57. Biochemistry

    All amino acids have two ionizable groups (an alpha-amino group with pKa~9.3, and an alpha-carboxyl group with pKa~2.2). Lysine also has an ionizable side-chain (R) with a pKa of 10.5. What percentage of the Lysine side chain is deprotonated at pH 11.5?

    asked by Jurry on September 29, 2016
  58. statistics

    A survey found that women's heights are normally distributed with mean 63.5 in. and standard deviation 2.3 in. The survey also found that men's heights are normally distributed with a mean 68.7 in. and a standard deviation 2.8. (a) Most of the live

    asked by Kelli on December 13, 2014
  59. Statistics

    Cola Corporation produces Orange Cola. The filling machines are adjusted to pour 12 ounces of soda into each 12-ounce can. However, the actual amount of soda poured into each can is not exactly 12 ounces; it varies from can to can. It has been observed

    asked by Steven on February 19, 2013
  60. Statistics

    Cola Corporation produces Orange Cola. The filling machines are adjusted to pour 12 ounces of soda into each 12-ounce can. However, the actual amount of soda poured into each can is not exactly 12 ounces; it varies from can to can. It has been observed

    asked by Steven on February 19, 2013
  61. math

    What was the percentage increase in motor vehicle production in countries outside the United States from 1950 – 1997? 1950- 10,577 1997- 53,463 I'm trying to figure out the percentages of population increases between different countries at different

    asked by Sissy on April 28, 2007
  62. Physics

    A 0.300 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.215 kg puck that is initially moving along the x axis with a velocity of 2.14 m/s. After the collision, the 0.215 kg puck has a speed of 1.14 m/s at an angle of q =

    asked by Arthur on September 30, 2012
  63. Math

    if brazil got 11401 internet subscribers (1000s) and 67510 internet users (1000s)and world got 518600 internet subscribers and 1544854 internet users what is the formula to find internet users per subscriber (average) and internet users as percentage of

    asked by SRay on May 28, 2010
  64. Math

    A. A survey of 110 teachers showed that 28 of them have a second job. B. A survey of 90 teachers showed that 27 of them have a second job. C. A survey of 70 teachers showed that 21 of them have a second job. D. A survey of 80 teachers showed that 32 of

    asked by Judy on March 27, 2018
  65. Economics Help!

    4) The manager of Collins Import Autos believes that the number of cars sold in a day (Q) depends on two factor: (1) the number of hours the dealership is open (H) and (2) the number of salespersons working that day (S). After collecting the data for two

    asked by Ed on June 4, 2007
  66. Statistics

    A group of freshmen and sophomore students was selected and each was asked whether they were a member of a student club. The following table was constructed: Student Club No Student Club Freshman 4 15 Sophomore 9 7 Find the probability that a randomly

    asked by Obi on October 2, 2015
  67. MATHS

    There are 2000 students in a course. They wrote a mathematics test which was scored out of 40 and then converted to percentage. 1. Draw a flowchart that reads the name, sex and score of each student, and outputs the names of the female students that scored

    asked by DAVID on May 23, 2017
  68. math

    hannah morris and hannah kim are going for the top batting average in thier softball league.Today is thier last game.up to now,hannah morris had 40 hits in 149 times at bat,and hannah morris has had 37 hits in 141 times at bat.Explain how they could end

    asked by jazz on January 8, 2008
  69. math

    Types of bonds are divided into three categories: good risk, medium risk, and poor risk. Assume that of a total of 13,838 bonds, 7,035 are good risk, 1,388 are medium risk, and the rest are poor risk. One bond is chosen is chosen at random. what is the

    asked by Anonymous on October 4, 2015
  70. Percents Using Proportions

    I do not understand the wording and/or got stuck while I was working on the following two problems: The attendance at a family reunion was 160 people. This was 125% of last year's attendance. How many people attended the reunion last year? There are 1,295

    asked by Samantha on January 18, 2013
  71. statistics

    It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific

    asked by jaipreet on November 16, 2010
  72. chemistry

    For the elements in row 2 of the PT discover the relationship between ionization and the family number of the element Element. Family. Ionization Ener Lithium. 1 13.6 beryllium. 2. 9.3 boron. 13. 8.3 carbon. 1 4. 11.27 nitrogen. 15 14.53 oxygen. 16. 13.62

    asked by lulu on October 13, 2016
  73. chemistry

    A 0.4671g sample containing sodium bicarbonate was titirated with hcl requiring 40.72ml. The acid was standardized by titrating 0.1876g of sodium carbonate FW 106mg/mmol requiring 37.86ml of the acid. Find the percentage of nahc03 fw 84mg/mmol in the

    asked by Fai on November 25, 2012
  74. Economics

    A large firm has two divisions: an upstream division that is a monopoly supplier of an input whose only market is the downstream division that produces the final output. To produce one unit the final output, the downstream division requires one unit of the

    asked by Kathy on June 15, 2011
  75. Experiment+ bio

    In the 1950s the heavy isotope of nitrogen (15N) and an ultracentrifuge were used in an experiment to investigate the manner in which DNA replicates. Bacteria were grown in a culture containing 15N nucleotides for several generations to ensure that only

    asked by Chalrey on December 12, 2006
  76. Organic Chemistry Lab

    Hi! For an orgo lab we had to isolate the following from milk powder and now I have to calculate the percentage yield, but first I need the theoretical yield. Can someone help me on the following? I need to know how of each there is in milk and I can do

    asked by Jeanne on April 8, 2011
  77. Chemistry

    Another student determined the concentration of a vinegar solution to be 0.240 mol/L. If the accepted value for the concentration of the vinegar is 0.250 mol/L, the student's percentage erreo is A. 1.00% B. 1.24% C. 2.40 % D. 4.00% D. because the

    asked by Brittany Rusk on September 21, 2006
  78. Physics

    A trebuchet was a hurling machine built to attack the walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach it from the castle wall.

    asked by barich on September 25, 2015
  79. 7th grade

    A company made 34,000.00 in 2007. This company made 32,500.00 in 2008. What is the percentage of the difference. The difference is 1,500.00 Is the difference 44.3 %? 34,000.00 32,500.00 _________ 66,500.00

    asked by Lana on December 7, 2008
  80. chemistry

    10. A student weight out a 25 g sample of NaCl, SiO2 and NH4Cl. The student determines the sample contains 3.0 g NH4Cl and 7.0 g SiO2. What is the percentage of NaCl by mass (weight) in the sample?

    asked by Anonymous on September 23, 2014
  81. College Physics

    A wire P has resistance R. If the wire is stretched and its length is increased by 10%, what would be the percentage change in its resistance? (Assume the density of the wire remains constant) A) - 10% B) 0 % C) 10% D) 20% My thoughts: Since resistance is

    asked by Andrew on November 24, 2011
  82. Math

    There are 2000 students in a course. They wrote a mathematics test which was scored out of 40 and then converted to percentage. 1. Draw a flowchart that reads the name, sex and score of each student, and outputs the names of the female students that scored

    asked by Hilya on May 21, 2017
  83. Math for IT

    There are 2000 students in a course. They wrote a mathematics test which was scored out of 40 and then converted to percentage. 1. Draw a flowchart that reads the name, sex and score of each student, and outputs the names of the female students that scored

    asked by binjamini zahuna on May 24, 2017
  84. Math

    A good estimation for planning on purposes is to figure on ________ of your gross income to be realized income. 65% *** 70% 80% If I was told that I would be making $40,000/year, would I need to multiply or divide by the percentage from the first question

    asked by Anonymous on May 16, 2018
  85. Maths (money and finance)

    The cash price for the Teledex Component System with a dvd is 1999.95 .If you buy the system on hire purchase you must pay a deposit of 200.00 and an instalment of 91.00 per month for 24 months Calculate: (a)The total amount you would pay for the system on

    asked by Jenny on June 21, 2018
  86. Chemistry

    Nitrogen and hydrogen, with volumes of 12.0 L each, are injected into a sealed rigid reaction chamber containing a catalyst. The pressure of the chamber is 8.00 atmospheres and at a known temperature. The reaction is allowed to proceed to completion while

    asked by Neha on August 10, 2011
  87. math

    With a confidence level of .95 and a confident interval of 5 and a population of 20,000 what is the sample size? With a confidence level of .99 and a confident interval of 5 and a population of 20,000 what is the sample size? Finally, using the sample size

    asked by sam on October 15, 2007
  88. Chemistry

    A 0.1818 g sample of sodium oxalate required 28.12 ml of a potassium permanganate solution to reach the endpoint (assume the reaction was carried out in excess acid). A 5.000 g sample of tin (II) sulfate containing potassium sulfate as an impurity was

    asked by Anonymous on October 31, 2015
  89. chemistry

    what are 4 chemical properties of organic compounds?i know there non polar molecules and they tend to e soluble in non polar solvents,,but my homework says i need 2 more and i don't know what else..thanks :) Some organic compounds are non-polar and some

    asked by tameka on January 4, 2007
  90. physics

    A canon of mass 1100kg fires a cannonball of mass 6.2kg at a speed of 190ms-1. a) Calculate the initial recoil speed of the cannon. b)The purpose of the firing the canon is to transfer chemical energy of the explosive into kinetic energy of the cannon

    asked by jothegreat on January 13, 2018
  91. Maths

    In order to make some home improvements, a home owner spent $40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and

    asked by Marty on March 6, 2008
  92. Math

    I know that year 2010, the population is 38.447 million and year 2011, the population is 38.935 million. The formula given: A=36.1e^(0.0126*t) Determine the population in 2010 and 2011 to nearest thousand people. Use these values to determine the increase

    asked by Melia on October 31, 2012
  93. Chem

    Calculate the work (in kJ) when 1.80 moles of methane react with excess oxygen at 389 K: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) I got 11661.26 Calculate the change in entropy (in J/K) when 70.1 g of nitrogen gas is heated at a constant pressure of 1.50 atm

    asked by Anonymous on March 27, 2013
  94. science

    What is the speed of motorist B? By what percentage did motorist A increase his speed for the second hour from the first hour? What is the speed of motorist A for the second hour? When motorist B reached his destination,how far behind was motorist A?

    asked by zoha on October 18, 2016
  95. science (I NEED BACKUP!!!)

    1. Which is the most complete model of feeding relationships? a.) food web b.) food chain c.) food pyramid d.) all of the above 2. _____ eat consumers only, while _____ eat both consumers and producers. a.) Producers; carnivores b.) Carnivores; omnivores

    asked by Emilia on November 27, 2015
  96. Geology

    Hi there I'm having trouble with this study guide. Could someone please help me? You’ve returned from a recent geologic expedition and discovered that the security at the airport has dumped out all of your carefully sorted rock samples into a heap. You

    asked by Matt on December 5, 2013
  97. sixth grade ratios and rates

    Tom and Jasper have the same percentage of blue marbles in their bags of marbles. Tom has 5 blue marbles and 20 total marbles. Jasper has 12 blue marbles. How many of Jasper's marbles are not blue? Can someone show me how to solve this problem?

    asked by Javonte on November 18, 2014
  98. prealgebra/ check answer please

    If 1,790 Mega Watts of power, out of the 3,000 Mega Watts generated by a power utility, reach the destination, what percentage of the generated power reaches its destination? 1,790 - 3,000 = 1,210 1,790 divided by 1,210 = 1.4 Answer 1.4% Unsure

    asked by toni on June 23, 2012
  99. Maths ...

    Hi Can anyone help with this little problem , I have to compare the percentage change for the following numbers from a graph (Tonnes) Comparing the lower years with the year 2050 Year 2050 = 14672.873 2046 = 14745.197 1990 = 6096.0 I have worked out the

    asked by Gary on June 20, 2009
  100. Operational Research

    The time required is known to complete a project is known to be normally distributed with a mean of 44 weeks and standard deviations of 8 weeks a) what is the probability that the project is finished in 40 weeks or fewer? b) what is the probability that

    asked by Phumla on May 30, 2015