1. Chem

    Suppose that you start with 1000000 atoms of a particular radioactive isotope. how many half-lives woruld be required to reduce the number of undecayed atoms to fewer than 1000?

    asked by Shay on October 20, 2014
  2. phyics/moon

    The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.5 m/s2 horizontally on the moon? A) 1.3 N B) 20 N C) 33 N D) 120 N E) 130 N

    asked by sam on June 14, 2010
  3. Spanish

    Hi, I would like some tips on what to say when you're talking to a friend about what you're packing & need to buy to go on a trip. This is a conversational piece where it is required that we speak out of context as well (talking about the weekend,

    asked by Nick on May 24, 2014
  4. physics help please!!!

    What is the angular momentum of a 2.5 kg uniform cylindrical grinding wheel of radius 19 cm when rotating at 1200 rpm? And how much torque is required to stop it in 5.7 s? Need help with step-by-step explanation.

    asked by Anonymous on March 25, 2010
  5. History

    Fill in the blanks. Under the Mississippi compromise, any new states formed west of the Mississippi river and north of the Missouri's southern border line were required to be __________.

    asked by Emma on January 27, 2013
  6. physics

    Agalvanometer of resistance 25 ohmes shows full scale deflection for current​ of 10mA, to convert it into 100 V range voltmeter , the required series resistance is

    asked by Ratnesh upadhyay on March 22, 2017
  7. SOC 302

    An Environmental Impact Statement (EIS) is a/an A:assessment required by National Environmental Policy Act (NEPA) to demonstrate that a proposed project does not harm the environment.

    asked by Lovely34 on November 13, 2017
  8. Math amortization payments

    What amortization payment would be required every six months at 14% interest to pay off a loan that is $35,000 with in four years. answer needs to be rounded to the nearest cent. please check my answer thanks :) $5,861.37

    asked by Anonymous on November 14, 2007
  9. chem

    How much heat is required to heat 0.1 g of ice at −30 C to steam at 100 C? Use the approximate values below for your calculation. cice = 2 J/g · C csteam = 2 J/g · C cwater = 4 J/g · C Hvap = 2, 260 J/g Hfus = 340 J/g

    asked by please help ! on March 2, 2012
  10. math

    0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M agn03 to react the end point. Calculate the percent of each compound present in the sample

    asked by Fai on December 21, 2013
  11. Chemistry

    The problem on my homework is: What mass in grams of iron metal is required to react with 2.50 L of .1500 M of sulfuric acid to produce 18.35g of iron (III) sulfate? please help!

    asked by Lauren on May 23, 2010
  12. chemistry

    Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3). How much limestone in kilograms is required to completely neutralize a 5.8×109 L lake with a pH of 5.6? thanks

    asked by amy on December 5, 2010
  13. Pharmacology

    Amoxicillin suspension 125mg/5ml give ¾ tsp PO bid Disp: 10 day supply 5. How much suspension is required to fill this prescription? 6. What is the amount of mg per dose?

    asked by KI on July 14, 2014
  14. ap chemistry

    What amount of energy is required to com- pletely ionize 26.9 grams of carbon atoms in the gas phase (C(g)) if the ionization energy of C(g) is 1086 kJ/mole? Answer in units of J

    asked by cheri on April 15, 2013
  15. physics

    How many joules of energy are required to heat 2 L of water from 25 C to 100 C? I looked up that the specific heat is 4200 J/kgK and i keep getting Q to equal 630000 but my homework website says that's wrong.

    asked by Sarah on October 20, 2016
  16. Representing Text

    If a term paper consisted 42 pages, each containing 40 lines of 100 symbols each (counting each space as a symbol), was to be encoded using Unicode, how many bytes of storage space would be required?

    asked by lj on April 5, 2011
  17. chemistry

    What is the molarity of a sulfuric acid solution if 30.00mL of H2SO4 is required to neutralize 0.840g of sodium hydrogen carbonate? H2SO4(aq) + NaHCO3(aq) → Na2SO4(aq) + H2O(l)+ CO 2(aq)

    asked by shane on December 4, 2012
  18. physics

    the floor of a lorry is 3m high, a plank 5m long is used as an inclined plan to raise some leading the maximum effort required to raise 200N load up the plane

    asked by mike on June 13, 2017
  19. physics

    A 100Kg stone is dragged 15m over a frozen lake. If the coefficient of friction between the stone and the ice is 0.1 and the whole process takes 8 seconds, how much work is done and how much power is required?

    asked by Gazza on June 12, 2011
  20. Chemistry

    Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Express your answer in Joules.

    asked by Rachel on September 19, 2015
  21. chem

    The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164kJ/mol. Calculate the longest wavelenght visible to the human eye

    asked by natash on October 28, 2008
  22. PHYSIC

    What current is required in the winding of a long solenoid that has 1000 turns uniformly distributed over a length of 0.4 m, to produce at the center of the solenoid a magnetic field of magnitude 1.0 x 10 -4 T?

    asked by KAIT on September 3, 2011
  23. physics

    A tapering wooden telegraph pole is 15ft long and its center of gravity is 6ft from one end. It weighs 400lbs. What force is required to lift each end?

    asked by bird on January 19, 2011
  24. history

    When a government lifted price controls after the war, prices a. remained about the same b. rose faster than wages c. fell to prewar levels d. required government support B?

    asked by y912f on May 27, 2009
  25. physics

    A person pushes a 14.5 kg lawnmower at constant speed with a force of 88 N directed along the handle, which is at an angle of 45o to the horizontal. What is the force required to accelerate it from rest to 1.5 m/s in 2.5 seconds?

    asked by Steve on October 11, 2008
  26. Math

    A certain medicine requires 10 mg per 40 kg of weight. How much medicine is required for a patient that weighs 203 pounds? Round answer to the nearest 10th. Use Unit Abbreviations for Units

    asked by chirssy on February 11, 2017
  27. physics

    An 85 kg football player traveling 4.7 m/s is stopped in 1.0 s by a tackler. What is the original kinetic energy of the player? (I tried using 1/2 m v^2 but that doesn't seem to be right. How do I manipulate the formula?) What average power is required to

    asked by brooke on June 19, 2012
  28. chemistry - titration question

    please help me with this question! a 1g sample of naoh contaminated with na2co3 is titrated with 0.500MHCl, and it is found that 46.5mL of HCl are required for neutralization. Find the percentage by mass Na2Co3

    asked by alex on April 22, 2008
  29. Information Technology Principles

    If a term paper consisted 42 pages, each containing 40 lines of 100 symbols each (counting each space as a symbol), was to be encoded using Unicode, how many bytes of storage space would be required?

    asked by saqer on April 6, 2011
  30. Chemistry

    hey guys can you please help me with this question. Identify the steps required to standardize a 0.1M HCl stock solution with sodium carbonate: Na2CO3, mol wt. = 105.99 g/mol. thank you

    asked by Josephine on August 22, 2007
  31. Chemistry

    3. Using Bohr’s model of the atom, calculate the energy required to move an electron from a ground state of n = 2 to an excited state of n = 3. Express your answer in both J/photon and kJ/mol.

    asked by Brad on April 24, 2013
  32. physics

    the floor of a lorry is 3m high, a plank 5m longis used as an inclined plan to raise some leading the maximum effort required to raise 200N load up the plane

    asked by mike on June 13, 2017
  33. physics

    A large stone is dragged 15m over a frozen lake. If the coefficient of friction between the stone and the ice is 0.1 and the whole process takes 8 seconds, how much work is done and how much power is required?

    asked by Gazza on June 12, 2011
  34. college statistics

    assume the population of heights of female college students mean of 64.37 inches standard deviation of 6,26 in and random sample of 74 find p(x>65.25)B. find p(x>65.25)c. why is formulas required to solve a different than c.

    asked by melba on June 14, 2012
  35. PHYSIC

    What current is required in the winding of a long solenoid that has 1000 turns uniformly distributed over a length of 0.4 m, to produce at the center of the solenoid a magnetic field of magnitude 1.0 x 10 -4 T?

    asked by KAIT on September 3, 2011
  36. physics

    Calculate the magnitude of the force FM required of the "deltoid" muscle to hold up the outstretched arm shown in the figure below. The total mass of the arm is 2.8 kg and θ = 11°. d=12cm D=24cm

    asked by Rpbert on October 29, 2016
  37. chem

    can someone plz help me with this? What mass of sucrose (C12H22O11) must be dissolved to make 460 mL of a 1.10M solution? thanks concentration= molessolute/volume moles solute=conc*volume massSolute/molmassSolute=conc*volume

    asked by Mary on April 16, 2007
  38. physics

    moving beltway at an airport has a speed v1 and a S length L. A woman stands on the beltway as it moves from one end to the other, while a man in a hurry to reach his flight walks on the beltway with a speed of v2 relative to the moving beltway. (a) What

    asked by anonymous on May 23, 2016
  39. chemistry

    The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is i solved it but my answer is wrong. the right one is 1.97. am i missing a step? moles of HCl left over = (moles of HCl) – ( moles of KOH) moles of HCl left over =

    asked by ben on November 23, 2010
  40. chemistry

    Aluminum metal reacts with oxygen gas (O2) to form aluminum oxide. a. Write a balanced equation for this oxidation-reduction reaction. (In this problem you need not worry about the physical state of the reactants or product.) 2Al+3O2=2Al2O3 b. which

    asked by krystal on February 15, 2012
  41. science

    how do i balance this equation: sodium hydroxide reacting with sulfurous acid [1 mol sulfurous acid reacts with 2 moles hydroxide ion] my hydrogens aren't balancing right 2 NaOH + H2SO3 -> Na2SO3 + 2 H2O ah thx, i accidently wrote H3O Why are oxygen tanks

    asked by Dan on October 19, 2006
  42. Soil Chemistry

    Gasoline producers add oxygenated chemical compounds to reduce the amount of carbon monoxide produced when the fuel is burned. Methyl t-butyl ether (MTBE) is one such oxygenate that is no longer used because of health and environmental concerns. what are

    asked by John on July 5, 2014
  43. home economics

    minerals required in very small amounts are known as _ _ _ _ _ minerals!

    asked by lisa on September 5, 2009
  44. Documents

    What does it mean by Enclosed Documents? documents that I am going to send or that are required

    asked by Amy~ on January 13, 2011
  45. Chemistry

    How many moles of Fe2O3 are required to produce 38.4 moles of Fe?

    asked by Joseph on September 25, 2011
  46. chemistry

    A mixture of gases has the following partial pressure for the component gases at 20 degrees Celsius: oxygen 180.0 torr, nitrogen 3200 torr, and hydrogen 246.0 torr. Calculate the pressure of the mixture.

    asked by Abby on November 6, 2014
  47. Chemistry

    How would you write a skeleton equation for these reactions I always get confused nickel(II)chloride(s)+oxygen(g)= nickel (II) oxide(s) +dichlorine pentaoxide (g) lithium chromate(aq)+barium chloride(aq)= lithium chloride(aq)+barium chormate(s)

    asked by Taylor on February 1, 2009
  48. AP chemistry

    Liquid butane, C4H10, is stored in cylinders, to be used as a fuel. The normal boiling point of butane is listed as -0.5 C. (a) suppose the tank is standing in the sun and reaches a temperature of 35 C. Would you expect the pressure in the tank to be

    asked by Harry on October 28, 2012
  49. chemistry

    Why is water essential to living things? A. Water is essential because it is an inorganic compound. B. Water is essential because it contains hydrogen and oxygen atoms. C. Water is essential to many of the chemical reactions that occur in the body. D.

    asked by I NEED HELP FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on May 1, 2014
  50. Chemistry

    Air entering the lungs ends up in tiny sacs called alveoli. It is from the alveoli that oxygen diffuses into the blood. The average voume of the alveoli is .00000000078 L. Assuming that the pressure in the alveoli is 1.0 atm and the temperature is 37

    asked by Anonymous on June 20, 2010
  51. chemistry

    a sample containing 1.50 mol neon gas has a volume of 8.00L.what is the new volume of the gas in liters when the following changes occur in the quantity of the gas at constant pressure and temperature? a.a leak allows on-half of the neon atoms to escape.

    asked by Jetta on June 27, 2010
  52. chemistry

    A researcher studying the nutritional value of a new candy places a 4.10-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.47 °C. If the heat capacity of the calorimeter is 33.90

    asked by anon on October 28, 2016
  53. chemistry

    A researcher studying the nutritional value of a new candy places a 3.10-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.34 °C. If the heat capacity of the calorimeter is 33.50

    asked by Shireen Shaikh on November 12, 2012
  54. Chemistry

    In an experiment 2.750 g of magnesium is reacted with 2.571 g of oxygen gas according to the equation: Mg + O2 ==> MgO. What mass of the other reactant is in exess? You need equal number of moles of each. Which has the excess? moles Mg=2.750/molmassMg

    asked by Ashley on June 3, 2007
  55. Inorganic Chemistry

    A researcher studying the nutritional value of a new candy places a 4.70-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.98 °C. If the heat capacity of the calorimeter is 39.80

    asked by Michael on March 11, 2016
  56. chem

    A researcher studying the nutritional value of a new candy places a 3.50-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.23 °C. If the heat capacity of the calorimeter is 31.30

    asked by rachel on March 21, 2018
  57. Chemistry

    A researcher studying the nutritional value of a new candy places a 5.80-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.93 °C. If the heat capacity of the calorimeter is 38.50

    asked by meg on February 24, 2015
  58. Chemistry

    Construct a cooling curve (looks the same as a heating curve) for a substance with a molar mass of 200 that has a gas phase specific heat capacity of 2.9J/g K, a boiling point of 525 K,a liquid phase specific heat capacity of 3.24 J/g K, a freezing point

    asked by Neveah on February 7, 2016
  59. science

    ethanol, C2H5OH, is responsible for the effts of intoxication felt after drinking alcoholic beverages. When ethanol burns in oxygen, carbon dioxide and water are produced. IF you have 256g of ethanol and 100 grams O2, calculate the amount product produced.

    asked by liz on February 6, 2011
  60. AP Chemistry

    Textrodotoxin is a toxic chemical found in fugu pufferish, a popular but rare delicacy in Japan. The compound has a LD50 (the amount of substance that is lethal to 50% of a population of iron (iii) hydroxide. Textrodotoxin is 41.38% carbon by mass, 13.16%

    asked by Rose23 on October 16, 2009
  61. science

    1.5173 g of organic iron compound containing FE , C ,H and O is burnt in oxygen gas produced 2.838 g OF carbon dioxide and 0.8122 g of water. In separate experiment to determine the mass % of iron, 0.3355 g of the compound yielded 0.0758 g iron (II) oxide.

    asked by Nor on June 28, 2016
  62. chem hwk

    a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns

    asked by wll.i.am on January 25, 2013
  63. chemistry

    At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 2NO(g) 3 + 2 + 2 ⎯⎯→ 3 . If all of the nitric acid produced by

    asked by bob on March 21, 2010
  64. science

    One reason carbon monoxide (CO) is toxic in that it bind to the blood protein hemoglobin more strongly than oxygen does. The hemoglobin – CO bond absorbs radiation of 1953 cm–1, which are in units of wavenumbers. Wavenumber is defined as the reciprocal

    asked by Johannie on April 2, 2010
  65. chem

    a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns

    asked by wll.i.am on January 25, 2013
  66. Chemistry

    Methane burns with oxygen to produce carbon dioxide and water as a gas. The balanced thermochemical equation is Ch4(g) + 2)2(g) ---> CO2(g) + 2H2O(g) H = -802kJ How much methane, in grams, must be burned to release 544 kJ of heat? My answer: 544/802 =

    asked by Is my right correct? on March 24, 2015
  67. science

    One reason carbon monoxide (CO) is toxic in that it bind to the blood protein hemoglobin more strongly than oxygen does. The hemoglobin – CO bond absorbs radiation of 1953 cm–1, which are in units of wavenumbers. Wavenumber is defined as the reciprocal

    asked by Johannie on April 2, 2010
  68. chemistry

    A student designs an ammeter (a device that measures electrical current) that is based on the electrolysis of water into hydrogen and oxygen gases. When electrical current of unknown magnitude is run through the device for 1.00 min , 15.4 mL of

    asked by EBB on April 28, 2016
  69. finances

    In a Chapter 7 bankruptcy, a debtor: A. is required to draw up a petition listing all assets and liabilities. B. does not have to pay a filing fee. C. is absolved of alimony and child support payments. D. does not have to repay educational loans.

    asked by tony on April 17, 2014
  70. physics

    The electron gun in a television tube is used to accelerate electrons with mass 9.109 × 10−31 kg from rest to 3 × 107 m/s within a distance of 4.7 cm. What electric field is required? The funda- mental charge is 1.602 × 10−19 C. Answer in units of

    asked by Anonymous on July 11, 2012
  71. Math

    This is math qustn plz help me to solve it bcz tmrw my test soreply soon as soon A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

    asked by Simon on January 31, 2013
  72. Math

    This is math qustn plz help me to solve it bcz tmrw my test soreply soon as soon A box measures 60cm*52cm*40cm.find the area of the cardboards required to make 280 such boxes.

    asked by Simon on January 31, 2013
  73. Chemistry

    How would one go about separating the following substances. It's review for my test. A solution contains Al3+, Ca2+, Fe3+ , and Ni2+ ions. Draw a flow chart that outlines the procedure required to separate this mixture (use the back if you need more room)

    asked by Matt on February 25, 2014
  74. physics grade 11 one word term

    one word/term. 1.3.The minimum amount of energy required to start a reaction. 1.4.The distance between the centre of a lens and its focal point. 1.5. The type of image formed on a screen when light rays converge.

    asked by marcia on September 27, 2011
  75. chemistry

    Calculate the volume required for complete neutralization of 60.00mL of 0.1500 M KOH(aq). a) 0.1500M nitric acid, HNO3. The answer I got for this question is 0.06 using method c1v1=c2v2 but I want to show using unit analysis. Please help me know how to do

    asked by tom on October 21, 2018
  76. physics

    The length l of a simple pendulum is about 0.5m, and can be measured within 1mm. what accuracy is required in the measurement of periodic time T of 100 oscillations if the error in l and T are to produce equal percentage in the calculation of acceleration

    asked by ridhi on April 20, 2012
  77. AP CHEMISTRY

    Determine the volume of 0.125 M NaOH required to titrate to the equivalence point 25.0 mL of a 0.175 M solution of a monoprotic weak acid that is 20% ionized. Answer is 35.0 mL. How do you find it?! It's been a really long time since we talked about

    asked by Ash on March 29, 2013
  78. Algebra

    Hi! Does anyone know a simple way to program the quadratic formula into a TI-83 (Texas Instruments?) I googled it, but most of the results required downloading (I don't have a connecting cable), or a bunch of keys that I couldn't find on my computer. Let

    asked by Rachelle on November 13, 2008
  79. physics

    High-performance race cars can accelerate from 0 m/s to 27 m/s (60 mi/h) in about 4 s. To see how large the acceleration due to gravity is, determine the time required for an object dropped from rest to attain a speed of 27 m/s. Ignore air resistance.

    asked by thaokieu on January 31, 2011
  80. Chem 101 calorimeter

    Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter (2 nested styrofoam cups) to the maximum temperature. PS don't say it makes no sense because its obviously a real question

    asked by Guapo on October 27, 2011
  81. Statistics

    A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscentific survey had an inital result of 30% .

    asked by Sue on April 16, 2013
  82. physics

    ok if a car is going around a bank curve my book is telling me there is an ideal spead were no friction is required at all for it to complete the banked turn it says that this occurs when the horizontal component of the normal force is equal to the radial

    asked by physics on July 30, 2009
  83. Health and PE

    your doctor tells you that you and your twin sister have the same basal metabolic rate (BMR). You live independent lives and do your own thing, so how can that be? Which factor is likely the reason? A. your age. B. your appetites. C. your required Daily

    asked by Dakota on February 12, 2015
  84. Physics

    The electron gun in a television tube is used to accelerate electrons with mass 9.109 × 10−31 kg from rest to 3 × 107 m/s within a distance of 2.4 cm. What electric field is required? The funda- mental charge is 1.602 × 10−19 C. Answer in units of

    asked by Anonymous on September 16, 2012
  85. Chemistry

    When 5 grams of wood burns completely and 15 grams of oxygen, 10 grams of water vapor and some carbon dioxide are given off. (How many grams of carbon dioxide would be produced in this example?)

    asked by Plllllzzzzheeeelllppppmeee on September 30, 2017
  86. biology

    After a meal rich in starch, the blood with the highest concentration of sugar would be in what blood vessel? What are the 2 blood vessels containing blood with the highest concentration of oxygen?

    asked by paula on September 16, 2009
  87. Chemistry

    The volume of a sample of oxygen is 300.0mL when the pressure is 1.00 atm and the temperature is 27.0 degrees C. At what temperature is the volume 1.00 L and the pressure 0.500 atm?

    asked by Kaitlin on May 31, 2011
  88. Chemistry

    Use oxidation numbers to identify reaction is REDOX reactions. a. 2SO2(g) + O2(g) -> 2SO2(g) for 2SO2 I got: -2 for S, -2 for O for O2 I got 0 for 2SO2 I got -2 for S again, and -2 again for 0 Therefore I lost one oxygen and a REDOX reaction occured Am I

    asked by Amy on June 19, 2011
  89. Chemistry

    During its combustion, ethane combines with oxygen to give carbon dioxide and water. A sample of ethane was burned completely and the water that formed has a mass of 1.61 grams. How many grams of ethane were in the sample?

    asked by Margaleta on August 18, 2015
  90. Are my answers correct? Chem

    I really need help with balancing these equations: Can you check if my answer are correct? Please 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl = SO2 + H2O + NaCl 2. Sodium

    asked by Anonymous on March 14, 2011
  91. chemistry

    When a 6.79-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 369 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1

    asked by abby on March 1, 2014
  92. Chemistry

    40 Ca2+ 20 79 Br- 35 58 Ni2+ 28 For the three ions written above give the correct number of each of the following: a) the maximum number of electrons in the first shell b)the unpaired electrons in an oxygen atom c)the full orbitals in a chlorine atom d)the

    asked by 0oooooooo0 on October 4, 2017
  93. Chemistry

    1. Imagine that you work at a company that prepares chemical solutions. You are asked to label a solution to sell to different customers. One customer is a hospital, another is a chemistry lab at a university, and a third is a physics lab at a university.

    asked by SMS on September 10, 2014
  94. Chemistry

    Good morning. I need help solving 2 problems for chemistry. For #1 I need someone to check my work and tell me if I did it wrong and show me how and where I went wrong. And for #2 I need someone to help me figure out how to solve it and explain. 1. With

    asked by Samantha on November 26, 2017
  95. Management accounting

    Suppose one chairlift costs $2 million and the slopes along with the lift have to be install for $1.3 million, this lift allows 300 skiers on the slopes, for 40 days out of a year. Running the lift will cost $500 a day for 200 days that the ski resort will

    asked by please help !!! on May 27, 2007
  96. Chemistry

    Calculate the theoretical amount of .5M NaOH that it would take to neutralize approx. 2.0 g KHP. KHP is a monoprotic acid, the molar mass of KHP is 204.22 g/mol and the molar mass of NaOH is 40.00 g/mol. Answer in terms of mL. I converted g KHP to mols,

    asked by Brad on March 29, 2016
  97. geololgy

    Earth and Venus are so similar in size and overall composition that they are almost “twins.” Why did these two planets evolve so differently? Why is Earth's atmosphere rich in oxygen and poor in carbon dioxide, whereas the reverse is true on Venus?

    asked by anonymous on May 24, 2011
  98. chemistry

    The gase in a mixture have the following partial pressures at the same volume and temperature, 1013000Pa nitrogen, 700mm argon, 1.20atm helium, 790 torr oxygen, and 0.50 atm of carbon dioxide. What is the total pressure of tyhe mixture in atm? You add

    asked by Chrissy on February 6, 2007
  99. Chemistry

    A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g NH3. What is the empirical formula

    asked by Anonymous on April 15, 2010
  100. chemistry

    2. Sulfuric acid comes from the oxidation of sulfur. The stages of the reactions are given below: S + O2 --> SO2 ∆H= -296.8 kj SO2 + 1/2 O2 --> SO3 ∆H= -98.9 kj SO3 + H2O --> H2SO4 ∆H= -130.0 kj The typical plant produces 750 tons of H2SO4 per day.

    asked by Christina on November 10, 2012