Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2, in a first-order process. If k = 2.5 x 103 s-1 at -5° Cand k = 3.5 x 104 s-1 at 25° C, what is the activation energy for the decomposition? 0.73 kJ/mol 58 kJ/mol 140 kJ/mol 580 kJ/mol I am

    asked by lucylu on September 26, 2010
  2. Chemistry

    Balance the following by placing the correct coefficients in front of each formula _____ CaO + _____ P4O10 ______ Ca3(PO4)2 All the numbers are in subscript b. Using: ammonium nitrate → water + nitrogen I oxide, write a balanced using correct chemical

    asked by jessica on December 11, 2018
  3. The Chemistry of Life Quiz // Just Answers please

    Which of the following are considered macromolecules? Select all that apply. (2 points) nitrogen lipids proteins*** carbon*** Which property allows water to stick to glass? (1 point) cohesion**** suspension adhesion solution How many valence electrons does

    asked by XenaGonzalez on August 20, 2015
  4. Physics

    A film of magnesium fluoride (n=1.38), 1.25x10^-5 cm thick, is used to coat a camera lens (n=1.55). Are any wavelengths in the visible spectrum intensified in the reflected light? ---------------------------------------- Bats use the reflections from

    asked by Larry on November 18, 2012
  5. chemistry

    For each of the following chemical reactions: a.)classify the reaction as combination, decomposition,single replacement, or double replacement. b.)complete the word equation. c.)using the formulas for both reactants and products, balance the chemical

    asked by Yeah on September 23, 2008
  6. smk lutong

    A compound consists only of carbon, hydrogen, nitrogen, and oxygen.  Combustion of 10.68 g of the compound  produced 16.01 g carbon dioxide and 4.37 g of water.  the molsr mass of the compound is 176.1 g/mol. what are the

    asked by nadeen on September 16, 2013
  7. chemistry

    copper metal reacts with nitric acid. assume that the reaction is 3Cu(s) + 8HNO3(aq) ——> 3Cu(NO3)2(aq) + 2NO(g) + 4H2O(l). if 5.58 grams of Cu(NO3)2 is obtained, how many grams of nitrogen monoxide would have formed

    asked by robert on October 12, 2012
  8. CHEM

    If NO3- has 3 resonance structures, but only one has to be written, where does the extra electron, making there then be 24 electrons, go if you cannot put brackets around the structure you are drawing? Do you put -1 on both of the singly bonded

    asked by K on November 26, 2007
  9. Chemistry

    A Gaseous mixture contains 4.08g of oxygen and 2.78g of Nitrogen a)What pressure is exerted by the mixture inside a 100.0ml metal container at 150C. b) what pressure is contributed by the oxygen? (please show steps)

    asked by cc on April 20, 2012
  10. science

    10. One group of gases that is responsible for destroying ozone in the ozone layer is A.car exhaust fumes B.CFCs C.nitrogen oxides and sulfur oxides D. Carbon monoxide and carbon dioxide I got B for my answer.

    asked by Sam on December 1, 2014
  11. science

    the list below shows three ways in which metals can react. a) strongly heat the metal in the air. b)add small pieces of the metal to cold water. c)add small pieces of the metal to dilute acid. in each case choose a b or c calcium oxide hydrogen (using

    asked by ellen on March 18, 2011
  12. Chemistry

    100.0cm3 of 2.0mol dm-3 hydrochloric acid is mixed with 2.5g of magnesium oxide powder. The mixture is stirred until no further change occurs. The resulting solution still contains excess hydrochloric acid. Calculate the volume of 1.5mol dm -3 sodium

    asked by Angeles on August 27, 2017
  13. chemistry

    An aqueous solution contains three solutes. One liter contains: 0.200 moles of calcium chloride, 0.150 moles of magnesium chloride, and 0.750 moles of sodium chloride. How many grams of Cl are there per liter of this solution? a. 39.0 g b. 51.4 g c. 78.0 g

    asked by Lisa on October 24, 2015
  14. Statistics

    It is not surprising that babies with low birth weights are at risk for developmental difficulties, but extraoridinarily large babies also face a higher than noraml risk of medical problems. In the United States the average full term single birth baby has

    asked by Kelsi on October 7, 2016
  15. Maths

    An industrial fertilizer costing $370 per tonne to produce is sold retail 61 cents per kilogram.If there is a wastage of 2.5%,find the profit as a percentage of the cost?

    asked by Sara on June 29, 2016
  16. math

    Money is deposited in an account for which the interest is compounded continuously. If the balance doubles in 6 years, what is the annual percentage rate? Can someone show me how to set this up? I have to use the equation: M(t)= Ce^(kt). Thanks.

    asked by ciara on February 25, 2010
  17. Science

    Equal Masses of phosphorus and chlorine react according to the follow equation. 2P+3Cl2=2PCl3 Which reagent is in excess and what percentage of it will remain at the end of the reaction

    asked by H on May 9, 2011
  18. Chemistry

    If 1.000g of (potash) K2CO3 reacts with H2SO4 to produce 145 mL of CO2 gas at STP, what is percentage of Potassium Carbonate in the marble sample?

    asked by Sarah J on October 16, 2011
  19. math

    Obesity is defined as a body mass index of 3 kg/m2 or more. A 95% confidence interval for the percentage of U.S. adults aged 29 years and over who were obese was found to be 22.4% to 22.5%. What was the sample size?

    asked by katelyn on March 6, 2011
  20. Physics

    Suppose a spacecraft of rest mass 34000 kg is accelerated to 0.206c. How much kinetic energy would it have? If you used the classical formula for KE, by what percentage would you be in error? Do not enter units.

    asked by VJC on November 22, 2010
  21. Math

    vacuum cleaner was purchase on the installment plan with 12 monthly payments $36.98 each. If the cash price was $415 and there was no down payment , find the annual percentage rate.

    asked by Peter on July 6, 2014
  22. Chemistry!!!

    3. Imagine that more than one band appeared in the GC chromatogram, but you were unable to run the standards. Instead you took the RI and corrected it to 20 oC (1.4205). RI can be used to determine the exact mole percentage of an isomeric mixture.

    asked by Mandy on November 27, 2010
  23. physics

    A stone is rotated steadily in a horizantal circle with a period T by a string of length L. If the tension in the stringis constant and L increases by 1% find the percentage change in T.

    asked by Dean on October 17, 2008
  24. computers

    Assuming that a manger sends 40 SNMP GET commands each second. what percentage of a 100 Mbps LAN link's capacity would resulting response traffic represent?

    asked by Mike on October 3, 2011
  25. Chemistry

    Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by

    asked by Anon on March 16, 2013
  26. math

    An electric mixer was purchased on the installment plan for a down payment of $60 and 11 monthly payments of $11.05 each. The cash price was $170. Find the annual percentage rate.

    asked by Michael on February 29, 2016
  27. math

    How long (in years) will it take your money to triple at an annual percentage rate of 5% compounded annually? Use logarithms to solve. Round and show 2 decimal places.

    asked by laurin on November 3, 2012
  28. College Bio

    If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)

    asked by Jay on July 26, 2014
  29. Chemistry

    A sample of impure magnesium was analyzed by allowing it to react with excess HCl solution: Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) After 1.27 g of the impure metal was treated with 0.100 L of 0.768 M HCl, 0.0125 mol HCl remained. Assuming the impurities

    asked by James on September 23, 2013
  30. Chem 111

    if the equilibrium concentration of nitrogen at 18degrees C is 0.256M and equil. concen. of hydrogen is 0.0184M what is the equil. concen. of ammonia? N2 + 3 H2 2 NH3; so K= [NH3]^2 / [N2][H2]^3 Is this correct? Then ICE table? Giving me.... K= (2x)^2 /

    asked by Anonymous on September 8, 2011
  31. Chemistry

    find the dry volume at STP of 500 mL of nitrogen gas measured over water at 15 degree C and 680 mmHg. the water vapor exerts a partial pressure of 12.8 torr at this temperature ( vapor pressure).

    asked by delo on November 27, 2012
  32. Ecosystems

    what r 2 major ways in which nitrogen is fixed in ecosystems? i don't get what they mean by "major" ways? also wikipedia uses difficult wordings i don't understand.

    asked by Sherrie on July 6, 2010
  33. chemistry

    Ammonia, NH3, can be made by reacting nitrogen with hydrogen. N2 + 3H2 = 2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react with enough N2? Please help!

    asked by Britt on March 19, 2012
  34. chemistry

    In what ways is the large scale generation of sulfur oxides easier to control than the generation of nitrogen oxides? and in what ways is it more difficult? please help me

    asked by Maya on April 10, 2008

    hydrogen reacts with nitrogen to produce ammonia. 3H2(g)+ N2(g) = 2NH3(g) Determine how much ammonia would be produced if 100g of hydrogen reacts?

    asked by Anonymous on April 4, 2011
  36. Chemistry

    At 27 degrees celcius, nitrogen has a volume of 650 cm^3 under a pressure of 980 mmHg. What would be its volume at the same temperature but at a pressure of 760 mmHg?

    asked by Richaj on September 15, 2014
  37. chemistry

    Air consists of 21 % oxygen, 78 % nitrogen and 1 % argon by volume. Calculate: * (a)  the partial pressures in Pa, if total pressure is 1 atm, 
 * (b)  the concentration in mol m–3, of each gas at 273 K, 
 * (c)  the average molar mass of air, 

    asked by S on November 21, 2017
  38. Chemistry

    The chemical reaction for the generation of gas in an automobile safety air bag is 2NaN3(s)→ 2Na(s)+3N2(g) What volume of gas is produced if there are 130.0 grams of NaN3 used in the reaction? (The density of nitrogen gas is 0.916 g/L.) Please show your

    asked by Kayla on March 31, 2014
  39. winterWx

    What is the average translational kinetic energy of nitrogen molecules at 1500 K, in the following units? (a) J (b) eV I already provided the formula for average KE in Joules, in an answer to a separate question of yours. average KE = (3/2) k T 1 eV =

    asked by Physics/Math on February 23, 2007
  40. chemistry

    The gases in a mixture have the following partial pressures at the same volume and temperature: 1,013,000 Pa nitrogen, 700. mmHg argon, 1.20 atm of helium, 790. torr oxygen, and 0.50 atm of carbon dioxide. What is the total pressure of the mixture in atm?

    asked by fabiola on April 3, 2010
  41. Chemistry

    Hello this is my first experiment I've ever done before and it was fun but I gotta figure out what NaCl produced and what it yielded in percentage. Can someone double check my work. Na2CO3+2HCl=2NaCl+H2O+CO2 Mass of empty crucible & cover: 33.076g Mass of

    asked by Henry on November 12, 2017
  42. chemistry

    Lysine, an essential amino acid in the human body, contains C,H,O and N only. In an experiment, the complete combustion of 2.175 g lysine gave 3.94 g of CO2 and 1.89 g of H2O. In another reaction, the nitrogen content of 1.873 g of lysine is quantitatively

    asked by helly on December 2, 2013
  43. maths &chemistry

    Nitrogen tetraoxide is known to dissociate accoding to the equation;N2O4(g)_2NO2(g).A250mlsample of the gas mixture weighs 0.257bar.Calculate the partial pressure of each gas.(Hint:obtain the pressure it had before dissociation ,and then use the idea of

    asked by SAIDI on November 30, 2010
  44. Chemistry

    How do these react? Some may have no reaction. a. aqueous chromium(III) nitrate plus magnesium metal b. aqueous lithium sulfate plus aqueous barium chloride c. solid lead metal plus aqueous potassium chloride d. aqueous lithium fluoride with aqueous

    asked by Blaire on April 5, 2011
  45. chemistry

    Reacting Mg with acid solution to form Mg salt and Hydrogen gas. What are the: 1.general reaction type 2. Chemical equation include phase 3. complete ionic equation include phase 4. chemical equation for the reaction between magnesium with water

    asked by shay on October 3, 2012
  46. Dissociation Equations Answer Check

    1. Write the equation for the dissolution of potassium iodide in water. KI(s) + H20 --> K+ (aq) + I- (aq) 2. Write the equation for the dissolution of magnesium bromide in water. MgBr2(s) + H20 --> Mg2+ (aq) + 2Br- (aq)

    asked by Anonymous on May 1, 2016

    which of the following elements would have the highest melting point?> a)K b)Mg C)Na D)al e)Ca Calcium would have the highest, follwed by aluminum, magnesium, sodium, lowest melting point-potassium. Please double check thank you i found that you are

    asked by ISA on April 24, 2007
  48. chem

    ---------- A compound has the formula Mg3X2. If 1.87 g of X combines with 4.86 g of magnesium, what is the atomic weight of X? A) 7.0 B) 14.0 C) 21.0 D) 28.0 E) 32.0 ---------- I'm having a really rough time with this one. It seems the total weight is 6.73

    asked by manny on September 13, 2007
  49. Chem II - Equilibrium

    A 2.00 mol sample of nitrogen dioxide was placed in an 80.0L vessel. At 200 degrees C, the nigrogen dioxide was 6.0% decomposed according to the equation: 2NO2 in equilibrium 2NO + O2 Calculate the value of Kc for this reaction at 200 degrees C. I have

    asked by Ken on March 6, 2008
  50. chemistry

    Write and balance the equation for the reaction between nitric acid and potassium iodide. The products are potassium nitrate, iodine, nitrogen monoxide, and water. 2HNO3 + KI = KNO3 + I + 2NO + H2O (Did I write the equation correctly?)

    asked by Kat on April 15, 2016
  51. Chemistry

    SHOW WORK A cylinder containing 48g of nitrogen gas at room temperature is placed on a scale. The valve is opened and 12g of gas are allowed to escape. Assuming that the temperature of the cylinder remains constant, how does the pressure change?

    asked by Caitlyn on December 4, 2013
  52. chemistry

    I want to know if someone could let me know if I have written my balanced equations correct for the following questions. Write a balanced equation for the reaction of zinc with sulfuric acid. Zn + H2SO4 >>> Zn(S04) +H2 Write a balanced equation for the

    asked by jazz on April 21, 2014
  53. science

    Never found in nature uncombined? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

    asked by liz on November 7, 2007
  54. Physical science

    Never found in nature uncombined? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

    asked by liz on November 7, 2007
  55. physical science

    do not noramlly react with other elements? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

    asked by liz on November 7, 2007
  56. Economics

    1. Why is it difficult for the fed to prevent recessions by lowering interest rates A. The Fed can change the rate only once each year. B. It can take years for local banks to change their rates. C. The Fed's rate does not affect business loans. D. It can

    asked by Anonymous on July 18, 2016
  57. chemistry

    Compute the vapor pressure of water above a solution formed by dissolving 25.00 grams of magnesium sulfate, MgSO4 (MM=120.3) in 95.00 grams of water at 338K. The vapor pressure of pure water at 338K is 188.0 torr.

    asked by Aimee on February 24, 2009
  58. Science(chem)

    I have a few questions I need help with! 1. Hydrogen bonding will account for the unusual physical properties of water. TRUE FALSE 2. Air is considered to be a homogeneous mixture that is 79% nitrogen gas, 20% oxygen gas and 1% all the other gases. In this

    asked by salinas on March 12, 2008
  59. chem

    Nitrogen(75.5 kPa), oxygen (19.2 kPa), carbon dioxide(0.05 kPa) and water vapor(4.3 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa?

    asked by joe on March 30, 2008

    My chem class just finished a lab in which the objective was to find the percentage of silver and barium in a nitrate salt mixture by precipitating the chromates, separating out the precipitate from the solvent and spectator ions via filtration, and

    asked by Catie on January 28, 2008
  61. Maths

    An industrial fertiliser, costing $370 per tonne to produce, is sold retail at 61 cents per kilogram. If there is a wastage of 2.5%, find the profit as a percentage of the cost Working Ou Please Thanks

    asked by Babiinoob on October 6, 2011
  62. chemistry

    Naturally occuring boron is composed of only two isoptopes 10/5B and 11/B with isotopic masses of 10.0129 and 11.00931 respectively. To account for the atomic mass of 10.811 what must be the percentage abundance of each isotope?

    asked by felpin on October 27, 2011
  63. Social Studies ( Check my answer)

    1. What group of people made up the largest percentage of workers in American industry during the late nineteenth century? Native Americans Immigrants *** Plantation Owners

    asked by Anonymous on November 9, 2015
  64. Technology

    Design the defining diagram, hierarchy chart and the algorithm that will determine the percentage sales commission earned on loyalty customers' purchases from a customer file.

    asked by Devi on May 12, 2012
  65. Statistics

    A study found that 82% of elementary students buy lunch at school at least once a month. How large a sample would be necessary to estimate the true proportion within four percentage points with 95% confidence

    asked by Statistics on May 14, 2014
  66. Math

    Why is this problem 37,1% correct. Sam scored 45 points againd Memphis in an NBA game. He made 13 of 37 shots what was his shooting percentage? Multiple choice test. 37% 37.4% 37.1% 37.3%

    asked by Amber on March 9, 2007
  67. math

    A company borrowed $1500. It must make monthly payments of $40.50 for 42 months to pay off the loan. Use the constant ratio formula to find the annual percentage rate.

    asked by CC on June 10, 2011
  68. finance

    A firm has decided to borrow $500,000 on a 10% add-on basis, payable in 8 end-of-month installments. What would the nominal annual percentage rate on the loan be.

    asked by Myrtis Edwards on December 9, 2009
  69. math

    I need help for these two problems and if I can get the steps thank you. 1.solve for x: 0.34=1/(1+x)carrot3 2.If you buy a share of stock for $15 and sell it 2 years later for $18.50, what is the annual percentage return (on a compound basis) that you

    asked by steve on February 7, 2013
  70. chemistry

    Calculate RAM of Cu and S from the percentage abundances of their isotopes Use your answers to find the RFM of Copper (II) Sulfide, Cus 63Cu- 69.1% 65Cu - 30.9% 32 Sulphur-95.0% 33 S-0.76% 34S-4.22% 35S-0.20%

    asked by vidya on February 19, 2016
  71. chemistry

    Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3NO2(g) + H2O(`) −! 2HNO3(`) + NO(g) If 745 L of NO2 gas react with water, what volume of NO gas will be produced? As- sume the gases are measured under the same

    asked by Aaron on February 8, 2012
  72. chemistry

    To prepare the titrant fo amonia nitrogen analysis an analyst weight out 1.20 grams of concentration 98% sulfuric acid and brings to 1000 ml in lab pure water. if the molecular weight is 98 calculate the normality of the solution this analyst has prepare.

    asked by Faye on March 26, 2011
  73. chemestry

    A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157g of the compound produced 0.123g carbon dioxide and 0.0310g water. In another experiment, it is found that 0.103g of the compound produces 0.0230g ammonia. What is the

    asked by salz on March 11, 2016
  74. Physics

    An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?

    asked by Johnson on April 20, 2008

    (b) The density of platinum is 23.4 g/cm3 at 20°C. Calculate the mass of 77.0 cm3 of platinum at this temperature. (c) The density of magnesium is 1.74 g/cm3 at 20°C. What is the volume of 275 g of this metal at this temperature? *what I am stuck on the

    asked by Anon. on August 8, 2013

    At what temperature does a 16.3 g of nitrogen gas have a pressure of 1.25 atm in a 25.0-L tank? Plz show me step by step how to do this, with using pressure as atm.

    asked by ~anonymous on May 10, 2010
  77. chemistry

    A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 853mmHg ?

    asked by Anonymous on March 20, 2014
  78. chemistry

    1)nitrogen atom has atomic no 7 and mass no 14.hydrogen atom has atomic no 1 and mass no 1.what is no of protons and neutrons of ammonium ions

    asked by vishal on June 21, 2013
  79. chemistry

    how do i solve the following problem? Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 → 2NO + O2 In a particular experiment at 300°C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The rate of Disappearance of NO2 for this

    asked by jess on November 18, 2010
  80. Chemistry

    When heated to 350. ∘C at 0.950 atm, ammonium nitrate decomposes to produce nitrogen, water, and oxygen gases: 2NH4NO3(s)→Δ2N2(g)+4H2O(g)+O2(g) Using the ideal gas law equation, calculate the volume, in liters, of water vapor produced when 21.8 g of

    asked by Telimm on June 29, 2015
  81. chemistry

    We have 1 mol of N2 gas that is heated at constant pressure from 300K to 5770K on the surface of the sun. i) Find H and S given that P for nitrogen is (25.7 + 0.0130T) J/mol-K. ii) Now, redo your calculation assuming that the second T-dependent term

    asked by Ben on February 12, 2009
  82. 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 patricia on December 16, 2018
  83. chem

    Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room

    asked by lisa on February 2, 2010
  84. organic chem

    Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room

    asked by lisa on February 2, 2010
  85. math

    Farmer fred has 200 sheep on his farm he sells 40 of them what percentage of his sheep does he have left?

    asked by Manaria on February 11, 2015
  86. Math

    What percentage of the total students chose skateboarding? Skateboarding boys=2 girls=1 A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank took you

    asked by Anonymous on March 31, 2015
  87. physics

    A simple pendulum has a length of 1.25m.calculate its period and what is the percentage increase of the period?

    asked by Tolu on January 23, 2017
  88. Chemistry

    Consider an alloy that is 14.1% copper by mass in tin. Copper makes up what percentage of the atoms in this sample?

    asked by Seth on February 12, 2017
  89. statistics

    Given a population of scores is normally distributed with mu of 110 and a standard deviation of 8 the percentage of scores that are below a score of 99?

    asked by Debra on June 7, 2013
  90. math

    How can I solve this question, Write 83.9% as a decimal, and write 0.038 as a percentage. I just can not remember how to do this. Sorry and thank you for your help and time.

    asked by Mary Ann on January 7, 2015
  91. math

    the price for a stock has decreased from $24.50 per share to 18.60 per share. what percentage is the decrease? how do i figure this question out please?

    asked by Chris00 on November 30, 2009
  92. math

    with a mean of 515 and a standard deviation of 135, what percentage score 110-515 using the 68-95-99.7 rule

    asked by Ron on October 27, 2011
  93. Statistics

    If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 4 of her next 6 shots?

    asked by Hannah Jorgensen on October 5, 2016
  94. chemistry

    What is the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3)?

    asked by juan on January 12, 2016
  95. math

    grace made 6 out of 10 shots at the basket ball game. what percentage of shots did she make?

    asked by ggae on October 7, 2014
  96. math

    2 person in a business. first pur $100& gets $120 and second puts $80 and gets $100. Who gains more and by what percentage?

    asked by san on May 13, 2010
  97. Math

    Given that an English pound is worth $1.64, how much larger is a pound than a dollar? Answer in percentage terms

    asked by Marche on February 14, 2012
  98. Math

    1.if 40% of pupils in a school are boys,what percentage of the pupils are girls? 2.increase 448 by 25% 3.decrease 20.00 by 5%

    asked by Maryam on January 18, 2016
  99. Math

    adeline spent 5/8 her money on books and 1/2 of the remainder on food. what percentage of her money had she ledt?

    asked by Natalia on March 6, 2018
  100. Statistics

    If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 2 of her next 9 shots?

    asked by Hannah Jorgensen on October 5, 2016