1. Chemistry

    A 2.5g sample of impure Copper was analyzed by allowing it to react with 45mL of 5M Nitric Acid to form Copper (II) Nitrate, Nitrogen Dioxide, and Water. Of the Nitric Acid, .0125mol remained. Assuming impurities do not react, what is the % Copper in the

    asked by Delila on March 31, 2018
  2. chemistry

    The urine of horses are mixed with an excess of hydrochloric acid, after some time, a yellowish-brown crystalline precipitate, which have an unpleasant odor, that can't be removed by simply washing with water. This new compound has the following

    asked by Ad on September 11, 2013
  3. chemisrty

    What is the total pressure of the gas produced in the burette if it contains nitrogen gas whose pressure is 1.5 atm, oxygen gas whose pressure is 1.6 atm and water vapour with a pressure of 1.3 atm.

    asked by lusiana on May 25, 2015
  4. BioChem

    Please help with this question. Insulin, antibodies, enzymes and progesterone are four of many molecules found in and around cells. Of these four__________ are/is not a protein. a. antibodies b. insulin and antibodies c. antibodies and progesterone d.

    asked by Jamshid on June 17, 2006
  5. Math

    2. Columbus would have taken some live animals aboard for food sources. If there were one hundred fifty animals, of which seventy-three were rabbits and the rest were chickens, what percentage of the animals were chickens? Please round your answer the

    asked by Sue on April 1, 2014
  6. CHM 105

    Vinegar contains ethanoic acid (CH3OOH).titration of 3.00g of vinegar with 0.12M NAOH Solution requires 23.0cm3 to reach the equivalent ppoint.what is the weight percentage of the ethanioc acid in vinegar?

    asked by Ekekhide on January 7, 2016
  7. chemistry

    Manganese(III) fluoride, MnF3, can be prepared by the following reaction: 2MnI2(s) + 13F2(g) → 2MnF3(s) + 4IF5(l) If the percentage yield of MnF3 is always approximately 51%, how many grams of MnF3 can be expected if 40.0 grams of each reactant is used

    asked by Brittney on October 6, 2013
  8. chemistry

    treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

    asked by Martha on January 25, 2012
  9. Math

    The COE price for a small car in January was $16,525. In November, the COE price had increased to $24,725. Find the percentage increase in the COE. Express your answer correct to 1 decimal place.

    asked by Sheen on October 4, 2016
  10. chemistry

    treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

    asked by Martha on January 25, 2012
  11. chemistry

    treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

    asked by Martha on January 25, 2012
  12. Math

    The half-life of carbon-14, which is used in dating archaeological finds, is 5730 yr. Assume that 100% of the carbon-14 is present at time 0 yr, or x=0. Write the equation that expresses the percentage of carbon-14 remaining as a function of time.

    asked by Hanna on October 11, 2011
  13. chemistry

    'Manganese(III) fluoride, MnF3, can be prepared by the following reaction: 2MnI2(s) + 13F2(g) ? 2MnF3(s) + 4IF5(l) If the percentage yield of MnF3 is always approximately 56%, how many grams of MnF3 can be expected if 10.0 grams of each reactant is used in

    asked by walter H on March 9, 2015
  14. investing

    i have to write these definitions with illsutrations. Nominal value/face value, market value, rate of dividend, annual dividend, rate of income, rate of return, percentage yield, Demat, bullish, bearish please help me i want a particular site.

    asked by Viktor on June 7, 2008
  15. sceince

    Johnny just learned about ecosystems in his class at school. At dinner, he explains to his parents that we live in an ecosystem and they are a mix of biotic and abiotic factors. He then tells them an ecosystem can still survive even if one small thing is

    asked by Anonymous on April 17, 2018
  16. physics

    The volume of the Earth's oceans is approximately 1.4×1018 m3. The Earth's radius is 6.4×106 m. What percentage of the Earth, by volume, is ocean?

    asked by julianna on December 5, 2010
  17. math

    The interest rate on an auto loan in May was 12 3/8%. By September the rate was up to 14 ¼%. How many percentage points did the interest rate increase over the period?

    asked by Anonymous on August 14, 2010
  18. chemistry

    When a 8.45-mg sample of a compound containing carbon is burned completely, 18.1 mg of carbon dioxide is produced. What is the mass percentage of carbon in the compound?

    asked by kai on March 12, 2017
  19. Chemistry

    50 ml of 5 M H2SO4 react with excess BaCl2 to Make 40 g of BaSO4. a.) What is the theoretical yield of BaSO4? b.) What is the Percentage yield of BaSO4

    asked by Bert on November 4, 2010
  20. Math

    A car decreases in value by 20% for the first year, and for each later year by 12% of its value at the beginning of that year. Calculate the percentage decrease in the value of the car after 3 years. Answer not 44% if that is what you got.

    asked by Anonymous on January 8, 2016
  21. Chemistry

    An impure sample of substance X melts at about 113 degress. Which of the substances could be X and state y Resorcinal 111 degrees Catechol 105 Nitrophenol 114 Butanamide 115 I think it is either catechol or resorcinol because as stated the higher the

    asked by Jiskhaa on June 26, 2012
  22. Constitution

    Judicial review has been used to invalidate approximately what percentage of all federal laws? A. 1 B. 5 C. 20 D. 50 is it C 2. When a case is improperly removed from state court, and then returned to state court, the process is referred to as: A. remand.

    asked by Amy on January 10, 2015
  23. Chemistry

    When 1.63 g sample of an unknown hydrocarbon is completely burned in oxygen, 4.97 g of CO2 are produced. What is the percentage by mass of hydrogen in this hydrocarbon? THANK YOUU Found out the formula: 4CH+5O2--> 4CO2+2H2O then found out the moles of CH=

    asked by Alex on September 15, 2015
  24. Music

    23. If the fourth chord of a note is a seventh above the root, the chord is: a. a 7th chord b. a triad c. non-tertian d. a 4th chord Not sure 33. The inversion of triads can be written with roman numerals and a. letters b. small numbers c. percentage signs

    asked by mysterychicken on June 1, 2013
  25. chemistry

    the percentages of carbon,hydrogen and oxygen in vitamin c were determined by burning a sample weighing 2.00mg,the masses of carbondioxide and water formed are 3.00mg and 0.81mg respectively.from these information,find the percentage of each element and

    asked by yankoua on October 28, 2009
  26. Chemistry

    A 10.0 gram sample of a mixture of CH4 and C2H4 reacts with oxygen at 25°C and 1 atm to product carbon dioxide gas and liquid water. If the reaction produces 520 kJ of heat, what is the mass percentage of CH4 in the mixture? PLEASE HELP! I do not know

    asked by Michelle on October 26, 2014
  27. english

    i wrote thins hoping that someone can help me with giving me some ideas on the topic this is what they want In a total of 200 words, write two paragraphs with about how interest rates affect our purchasing decisions. Identify the topic sentence in each by

    asked by rhonda on September 24, 2010
  28. englisj

    i wrote thins hoping that someone can help me with giving me some ideas on the topic this is what they want In a total of 200 words, write two paragraphs with about how interest rates affect our purchasing decisions. Identify the topic sentence in each by

    asked by rhonda on September 24, 2010
  29. Chemistry

    A 2.52g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 4.36g of CO2 and 0.892g of H20. Another sample of the same compound of mass 4.14g, yielded g of SO3. A third sample, of mass, 5.66g,

    asked by Christina on September 6, 2010
  30. Chemistry

    Nitrogen & hydrogen goes react to form ammonia gas as follows: N2(g)+3H2(g)-->2NH3(g) At a certain temperature & pressure, 1.2L of N2 reacts with 3.6L of H2. If all the N2 and H2 are consumed, what volume of NH3, at the same temperature & pressure will be

    asked by Ezra on November 3, 2012
  31. Chemistry

    copper is a product of the reaction that occurs when dry ammonia is passed over a sample f heated copper(2) oxide.The equation for the reaction is given: 2NH3+3CuO=3Cu+3H2O+N2 Calculate the mass of copper produced if 0.12dm^3 of nitrogen is produced at

    asked by Alyssa on November 27, 2014
  32. Physics

    Many people mistakenly believe that the astronauts who orbit the Earth are "above gravity." Calculate g for space shuttle territory, 290 kilometers above the Earth's surface (dashed line in sketch). Earth's mass is 6 1024 kg, and its radius is 6.38 106 m

    asked by Alfonso on October 5, 2013
  33. math

    I need to know how to calculate what percentage of a number is to another. let me make that clearer, 35 is what percent of 48? how is that calculated? What you are asking is this: 35 is to 45 as x is to 100 or 35/48=x/100 solve for x x=.729 Now to get %

    asked by jerry on August 22, 2005
  34. Math PROBABILITY part 1

    Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects? A. 3/8, 0.375, 37.5% B. 8/5, 1.6,

    asked by plz plz help, i will fail 7th grade if i fail this on February 6, 2017
  35. physics

    The average speed of a nitrogen molecule in air is proportional to the square root of the temperature in kelvins. If the average speed is 475 m/s on a warm summer day (temperature = 300.0 kelvins), what is the average speed on a cold winter day (250.0

    asked by amy on September 5, 2007
  36. Chemistry

    Bacterial digestion is an economical method of sewage treatment. 5CO2(g) + 55NH4+(aq) + 76O2(g) -> C5H7O2N(s) + 54NO2-(aq) + 52H2O(l) + 109H+(aq) bacterial tissue The above reaction is an intermediate step in the conversion of the nitrogen in organic

    asked by Frances on November 5, 2012
  37. Chemistry

    Bacterial digestion is an economical method of sewage treatment. 5CO2(g) + 55NH4+(aq) + 76O2(g) -> C5H7O2N(s) + 54NO2-(aq) + 52H2O(l) + 109H+(aq) bacterial tissue The above reaction is an intermediate step in the conversion of the nitrogen in organic

    asked by Frances on November 5, 2012
  38. Science

    Are any of the bellow chemical changes reversible? If yes, then how? Mixture of Lear Nitrate and Potassium Iodide Mixture of Copper Sulphate Solution and Iron Mixture of Copper Sulphate Solution and Sodium Carbonate Mixture of Dilute Hydrochloric Acid and

    asked by Javal on October 24, 2010
  39. Chemistry 2

    The bottle of bleach lists the percentage of sodium hypochlorite as 6.0%. If the density of commercial bleach is 1.084 g/mL, how many mL of .150 M sodium thiosulfate is required to reach the endpoint in a titration if a student analyzed a 2.0 mL sample of

    asked by Anonymous on April 9, 2012
  40. math

    A sales manager was given a bonus of $6,090 on the year's sales of $400,000. When answering the following questions, please make sure your final answers are in percentage form and are accurate to 2 decimal places. For example 34.56%. a) What was the bonus

    asked by suvi on February 7, 2010
  41. Chemistry

    1. Weight loss from quick-weight-loss diets is generally loss of __________. A) fat B) carbohydrates C) muscle D) water*** 2. What is the recommended maximum percentage of a persons calorie intake should come from saturated fats? 0-5% 15-18% 7-10%***

    asked by M, S, E, on May 2, 2017
  42. chemistry

    A sample consist only NaCl and NaBr has amass of 0.7648gm. This sample is place in solution in which excess of silver is added which forma precipitate the AgCl and AgBr has amass of 1.5758 gm . what's the percentage of Cl and Br in original sample ?

    asked by Nechirwan on December 7, 2015
  43. math

    Some households were questioned about the numebr of can openers they possessed. The results are indicated in the frequency table shown below: # of openers; 0,1,2,3,4 and frequency;1,8,11,7,1 a. does this dtat appear to be skewed? explain b. How many

    asked by rita on April 6, 2011
  44. math

    Data collected from those who reported their credit card debt showed that the lowest average annual percentage rate on its credit cards was 0.019. Represent this as a percent. The lowest APR on its credit cars was __% ?

    asked by Taylor on September 16, 2013
  45. ALGEBRA 2

    The Rattlesnakes football team plays a different opponent every week. So far this season, the Rattlesnakes have won 3 games out of 6. Which equation models the number of consecutive games the Rattlesnakes must win in order to increase their winning

    asked by kayla on February 2, 2018
  46. chemistry

    Kc=5.85x10^-3 at 25 degrees C for the reaction N2O4(g)2NO2(g) fifteen(15.0) grams of N2O4 is confined in a 5.00-L flask at 25 degrees C. Calculate(a) the number of moles of NO2 present at equilibrium and(b) the percentage of the original N2O4 that is

    asked by confused on April 15, 2010
  47. stoichiometry

    A confiscated white substance, suspected of being cocaine, was purified by a forensic chemist and subjected to elemental analysis. Combustion of a 50.86-mg sample yielded 150.0 mg CO2 and 46.05 mg H2O. Analysis for nitrogen showed that the compound

    asked by escape on October 4, 2008
  48. Chemistry

    Magnesium metal reacts with hydrochloric acid to produce hydrogen gas H2 Mg + 2HCl ----> MgCl + H2 Calculate the volume (in liters) of hydrogen produced at 33 degrees C and 665 mmHg from 0.0840 mol Mg and excess HCl P= .875 atm V= ? n= .0840 mol R= 0.0821

    asked by Lauren on October 23, 2007
  49. Chemistry- Dr Bob

    Dr Bob Can you please assist Redox balancing in BASIC sol. NO2- +Al-->NH3 +Al(OH)4- if you could please walk through step by step. I don't know how to get oxidation #s for Al(OH)4- vs. Al I get Al=0 Al(OH)4-= +3 But if so...then my oxidation half reaction

    asked by Steve on June 8, 2013
  50. chemistry

    A 0.0677 g sample of magnesium metal reacted with excess hydrochloric acid solution to produce 69.9 mL of hydrogen gas. The gas was collected over water at 21.0° C. The levels of water inside and outside the gas collecting tube are identical (meaning that

    asked by Janaiby on July 8, 2013
  51. life science

    name the three enviormental factors in order for an organism to live. temperature, nutrients. Nutrients include oxygen, nitrogen, carbon dioxide and other gases if needed. Some organisms use ammonia as a nutrient. Since this is not my area of expertise, I

    asked by Emily on May 7, 2007
  52. Chemistry (Check)

    Q: Number of unpaired electrons in the nitrogen atom. A: 1s^2 2s^2 2p^6. 3 unpaired electrons in the p orbital Q: Number of 4d orbitals. A: 10 Q: Maximum number of electrons that can have n=3 and l=1. A: 1s^2 2s^2 2p^6 3s^2 3p^6. 2 electrons

    asked by Anonymous on September 13, 2015
  53. Chemistry- Dr. Bob

    Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4.

    asked by Anonymous on October 18, 2015
  54. Chemistry

    Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4.

    asked by Anonymous on October 17, 2015
  55. Chemistry

    Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4.

    asked by Anonymous on October 18, 2015
  56. chemistry

    a tank contains 2.6 mol of nitrogen and 1.3 mol of oxygen. If 0.65 mol of oxygen were added to the tank, what effect would this have on the pressure in the tank?

    asked by Anonymous on March 2, 2011
  57. organic chemistry

    Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4°C. The vapor pressure of water at 69.4°C is 227.7 mmHg. Compare

    asked by victoria on June 8, 2013
  58. Finance

    . Suppose the December CBOT Treasury bond futures contract has a quoted price of 80-07. If annual interest rates go up by 1.00 percentage point, what is the gain or loss on the futures contract? (Assume a $1,000 par value, and round to the nearest whole

    asked by KBrown on April 2, 2013
  59. Physics Number 3 (Online w/ no teacher)

    Many people mistakenly believe that the astronauts that orbit the Earth are “above gravity.” Calculate g for space-shuttle territory, 200 kilometers above the Earth’s surface. Earths’ mass is 6 X 10 to the 24th and its radius is 6.38 X 10 to the

    asked by Katie on October 27, 2008
  60. math

    Your station charges $16.50 for a lubrication job. As a promotion you sell six coupons for lubrication jobs for $90. What percentage discount are you offering for customers who purchase the 6-coupon lube book? Discount (to the nearest tenth) = % The answer

    asked by sarah on July 10, 2013
  61. Elementary Statistics

    "Scores on the Wechsler IQ test approximate a normal curve with a mean of 100 and a standard deviation of 15. b. What percentage of IQ scores are below 74?" I've been working at this for a while now, but when I solve for the z-score, I keep getting a

    asked by Nicole on March 11, 2015
  62. economics

    A speculator sells a stock short for $50 a share. The company pays a $2 annual cash dividend. After a year has passed the seller cover a short position of $42. What is the percentage return on the position (excluding the impact of any interest expense and

    asked by ron on January 19, 2014
  63. Statistics

    The Arcade shack is a manufacturing plant located in San Diego where 800 factory workers are employed. The personnel department selected 36 factory employees at random for the statistical study. construct a 95% interval for the percentage of males in the

    asked by Andre on May 23, 2012
  64. Chemistry please help :)

    A 1.10 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 degrees C and a pressure of 735 mm Hg . The dry ice is allowed to sublime (convert from solid to gas) and the mixture is allowed to return to 25.0 degrees

    asked by Jackie on October 25, 2011
  65. math

    27 letters in 1988, 18 letters in 1989 what is % of change? *need to know how you arrive at the answer Didide the change (-9) by the original value (27), and convert that fraction to a percentage. I'll be glad to critique your answer.

    asked by nicole on June 12, 2006
  66. Statics

    In a first semester unit there are four tests each of equal weight i.e. each worth 25%. Your average on the first three tests has been 62%. You need to get an overall average of 65% to proceed to the second semester. What percentage should you try to get

    asked by vicky on June 17, 2016
  67. chemistry

    A .500 g sample of impure CaO (a solid) is added to 50.0 mL of 0.100 M HCl. The excess HCl is titrated by 5.00 mL of .125 M NaOH. What is the percentage of CaO in the sample?

    asked by b on May 10, 2012
  68. goechemistry-science

    i ppted out iron(111) form a solution and weighed the ppt. then dissolved the ppt in a solution and run in an aas and get the concentration. how can i get the percentage concentration of fe3+ given that it is from fe(oh)3

    asked by didymus mupambo on March 13, 2012
  69. chemistry

    the mass of a certain mixture of BaO and CaO is found to be exactly one half that of the mixed sulfates formed from it by the action of H2SO4. calculate the percentage of BaO and CaO in the mixture.

    asked by jane on May 4, 2014
  70. Math

    Children 13 and younger make up 1/5 of the population in the U.S. What percentage of the population is older than 13 A.80% B.60% C.40% D.20% D? According to a survey 3 out o5 5 students bring their own lunch to school. What percent of students bring

    asked by Jerald on October 17, 2012
  71. Math

    In a class 85% of the student received the highest grade in English Literature, 80% in Math, 75% in History, and 30% in Chemistry. About what percentage of the students could you say for sure that they received the highest grade in all 4 subjects?

    asked by Kim on October 15, 2009
  72. Science

    A solution is prepared by dissolving 11gm glucose in 200 cm3 water at 30°c. What is the mass percentage of glucose in solution? The density of water 30°c is 0.996 glcm3?

    asked by Kiran on June 8, 2018
  73. Pre-Algebra

    In 2002 the rate for a first class U.S. postage stamp increased to $0.37. This represent a $0.34 increase since 1917. What is the percentage increase of postage since 1917? Solve the problem using a proportion.

    asked by Joy on April 1, 2008
  74. chemistry

    A mosquito fed on a solution containing phosphorous-32 is released. Phosphorous-32 has a half-life of 14 days. When the mosquito is recaptured 28 days later, what percentage of the original Phosphorus-32 will remain?

    asked by Victoria on January 20, 2015
  75. Chemistry

    A 1.00x10-6g sample of nobelium- 254, has a half-life of 55 seconds after it is formed. What is the percentage of nobelium-254 remaining at the following times? (a) 5.0 min after it forms (b) 1.0 h after it forms

    asked by Michele on December 7, 2017
  76. physics

    A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?

    asked by Lisa on January 10, 2014
  77. statistics

    Solve the problem. The lifetime of a new brand of light bulb can be described by a Normal model with a mean of 2000 hours and a standard deviation of 250 hours. Find the percentage of light bulbs that will last more than 2600 hours. A.) 100% B.) 5% C.)

    asked by Anonymous on September 13, 2010
  78. finance

    A manufacturing company issues a bond with a 100,000 face value and a coupon rate of 7%. If the bond has a life of 30 years, pays annual coupons, and the yield to maturity is 6.8%, what percentage of the bond's price is the present value of the face value?

    asked by chris on September 6, 2012
  79. Maths

    By selling a sofa set at 85% of the labelled price, Apex furniture earned a profit of 13.33% when it sold the sofa set for Rs 17,000.What will be the profit percentage if the discount is not offered?

    asked by Vaibhav on July 22, 2016
  80. Math

    Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 4%/year, compounded quarterly ? % (b) 3%/year, compounded monthly ? %

    asked by Amanda on November 23, 2012
  81. Math

    Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 4%/year, compounded quarterly ? % (b) 3%/year, compounded monthly ? %

    asked by Amanda on November 23, 2012
  82. Statistics

    Suppose that IQ scores have a bell-shaped distribution with a mean of 99 and a standard deviation of 12. Using the empirical rule, what percentage of IQ scores are less than 87? Please do not round your answer. 87-99 = -12/12 = -1 I get stuck here. I know

    asked by Comet on February 1, 2016
  83. Chemistry

    Iron is extracted from the mineral magnetite, Fe3O4: Fe3O4 (s) + 2 C (s)  3 Fe (s) + 2 CO2 (s) A 35.0 g sample of magnetite is reacted with 4.0 g of carbon, and 15.0 g of iron is produced. Determine the percentage yield of this reaction. (6)

    asked by Rowena on July 13, 2018
  84. chemisty

    Calcium carbonate can be decomposed by heating according to the equation Below. WHat is the percentage yield of calcium oxide in this reaction if 12.6g of CaO is obtained when 25.9g of CaCO3 is heated ? CaCO3(S) -> CaO (s) + CO2 (g)

    asked by blah on September 6, 2012
  85. statistics

    The life span of the battery pack is known to be Normally distributed with a mean of 250 hours and a standard deviation of 20 hours. How to find the percentage of the battery packs lasting more than 250 hrs.

    asked by noe on May 6, 2012
  86. physics

    a rubber ball is dropped from a height of 5m. After the 5th bounce, the ball only comes back up to 0.76m in height/ Find the percentage loss of kinetic energy for each individual bounce.

    asked by Sam on March 13, 2009
  87. math

    Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 7%/year, compounded daily % (b) 6%/year, compounded monthly %

    asked by Ashton on November 27, 2012
  88. Chemistry

    a student conducts and experiment by reacting 39.6g CuSO4 with an excess of MgS. The reaction yields 9.5599g CuS. What is the percentage yield? MgS+CuSO4=CuS+MgSO4

    asked by Amanda on October 3, 2012
  89. math

    When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest tenth of a percent. Category

    asked by kim on June 29, 2008
  90. Chemistry

    A compound containing only C, H, and N yields the following data. (i) Complete combustion of 34.8 mg of the compound produced 33.3 mg of CO2 and 40.9 mg of H2O. (ii) A 66.3-mg sample of the compound was analyzed for nitrogen by the Dumas method, giving

    asked by Darrel on November 20, 2012
  91. CHEMISTRY

    This is STOICHIOMETRY. Please i need help in the worst way. I don't understand this at all and it is due tomorrow, please i need someones help who really understands this. #1.aluminum nitrite and ammonium chloride react to form aluminum chloride, nitrogen

    asked by Jamie on May 14, 2010
  92. chemistry

    a 5.29 g sample of impure sodiun chloride was dissolved and dihuted to a total volume of 250 0 ml. If 25.0 mL of the sodium chloride solation required 28.5 ml, of 0 300 M AgNO3, solution to reach the equivalence point, using chromate indicator, what was

    asked by wallace on October 29, 2018
  93. chemistry-gases-ppm

    Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain. 4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g) Assuming that the temperature and the pressure remain constant, calculate the volume of air at 1 atm, 20 C, necessary to dilute the

    asked by Rose Bud on March 2, 2012
  94. biology

    I have some questions that relate to table 2.1 which lists the chemical elements that occur naturally in the human body. Similar percentages of these elements are found in most living organisms. a. In what abiotic (non-life) chemical forms are these

    asked by muffy on September 10, 2009
  95. ACC

    PATTYS BAKER HAS A COST OF GOODS SOLD FOR THE YEARS 2011,2010,AND 2009 RESPECTIVELY , OF $28,600,$26,900. AND $25,600. IF 2009 IS THE BASE YEAR, THE TREND PERCENTAGE FOR 2011 IS?

    asked by LIN on September 22, 2013
  96. science

    What is a relative change between two quantities known as? rate of change sum quotient percentage A? Read the scenario. A lizard is at an initial position of 2 m and walks to a position of 10 m in 4 s. What is the lizard’s average velocity? 2 m/s 2.5 m/s

    asked by Bri on May 25, 2018
  97. Math

    Im going to try another percentage problem. Will you please double check me. Thanks for all your help! 2580/4440=.581081081 Change to percent and round to nearest tenth. .581081081*100=58.108 rounded to nearest tenth is 58.1%

    asked by Amy on March 31, 2010
  98. Math

    In January, the price of a kilogram of potatoes at Supermarket X was $3.20. In May, a kilogram of the same type of potatoes cost $2.99. Find the percentage decrease in price. Express your answer correct to 1 decimal place.

    asked by Drake on October 4, 2016
  99. Statistics

    1. The mean and standard deviation of the grades of a group of students who took an economic exam  were 69 and 7, respectively. The grades have a mound-shaped distribution. According to the Empirical Rule,    a) Approximately 68% of the grades were

    asked by Larry English on September 10, 2011
  100. statistics

    The test scores of students in a class test have a mean of 65 and with a standard deviation of 8. What is the probable percentage of students scored more than 70? Please check work 70-65/8 = .625 = .2357 = 1.-.2357 = .7643 ANSWER 76% ????

    asked by Anonymous on February 10, 2014