1. Chemistry

    How many mL of concentrated HCl would be required to make 200mL of a 4M solution? Specific gravity = 1.2, assay = 40%

    asked by Yue on May 13, 2014
  2. chem

    What mass of NaCl is required to precipitate all the silver ions from 19.2 mL of 0.100 M AgNO3 solution?

    asked by Sara on March 19, 2011
  3. Physics

    Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr?

    asked by Abhishek on April 8, 2013
  4. Physics

    What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m?

    asked by Vladimyr on May 29, 2012
  5. Physics

    What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6

    asked by MA on November 2, 2012
  6. chemistry

    What mass of NaOH is required to precipitate all the Fe2+ ions from 50.0 mL of 0.200 M Fe(NO3)2 solution?

    asked by jennifer on January 11, 2010
  7. chemistry

    What volume of ammonia gas at STP is required to neutralise 40cm of 2m sulphuric acid

    asked by Anonymous on April 28, 2018
  8. chemistry

    What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

    asked by i dont know how to set it up! on March 1, 2011
  9. Maths, physics, chemistry,

    The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

    asked by Deepak on April 29, 2017
  10. chemistry

    What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

    asked by i dont know how to set it up! on March 1, 2011
  11. Calculus

    Determine how many terms are required to approximate the sum of the series ((-1)^(n+1))/n^2 from n = 1 to inf with an error of less than 0.001.

    asked by Anonymous on March 15, 2018
  12. Algebra

    Show that two WRONG's can make a RIGHT. Replace each different letter in the addition problem with a different digit. It is required that O=zero.

    asked by Rachel on November 21, 2010
  13. chemistry

    how ,amy grams of aspirin are required to react exactly with 29.40ml of a 0.6M solution of sodium hydroxide

    asked by ujay on January 17, 2010
  14. chemistry

    65.0 mL of water is heated to its boiling point. How much heat in Kj is required to vaporize it? (Assume a density of 1.00 g/mL)

    asked by jessa on September 10, 2010
  15. Chemistry

    How many milligrams of NaHCO3 are in a 500mg tablet if 40.0 mL of 0.120M HCL is required to neutralize the sample?

    asked by prince on December 9, 2010
  16. Hypothesis Statistics

    A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis?

    asked by Courtney on September 9, 2012
  17. Science

    minimum temperature required to dissolve 40g NaCl in 100g water thanks a ton

    asked by Sarah on March 16, 2018
  18. Chemistry

    What volume of 0.5 N nitric acid would be required to completely neutralize 300 ml of 1.0 N sodium hydroxide?

    asked by Jeff on October 6, 2010
  19. Chemistry

    how much CuSO4.5H2O is required to prepare 100 ml of a .050M aqueous stock solution?

    asked by jen on March 15, 2010
  20. College Chem

    Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.

    asked by Kelli on October 3, 2010
  21. Chemistry

    what volume (mL) of 0.0962M NaOH is required to neutralize 10.0mL of 0.128M H2SO4? I got 26.6mL

    asked by Veronica on June 8, 2014
  22. chemistry

    what mass of potassium hydroxide is required to produce 2.00L of a solution mthat has a pOH of 4.5?

    asked by judi on May 8, 2010
  23. chemistry

    What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

    asked by i dont know how to set it up! on March 1, 2011
  24. algebra Word problem

    what interest rate is required for an investment subject to continuous compounding to triple in 15 years? A= Pe^rt ?

    asked by Kira on April 11, 2014
  25. Organic Chemistry

    calculate how much of 10% aqueous sodium carbonate would be required to neutralize the solution (This is during the preparation of benzocaine)

    asked by Emma on April 3, 2012
  26. Physics

    What net external force is required to give a 30 kg suitcase an acceleration of 2.5 m/s2 to the right? Answer in units of N

    asked by Sam on September 18, 2013
  27. physics

    How much heat is required to convert 3kg of ice at -5 degees C into steam at 125 degrees C?

    asked by angelina on April 20, 2017
  28. Physics

    How much work is required to bring a 1000 kg racing car traveling at a speed of 60 km/hr to rest?

    asked by Reed on March 18, 2016
  29. Math

    It is required to sit 4 males and 5 females in arrow so that the male occupy the even place. How many such arrangements are possible?

    asked by Honey on October 7, 2015
  30. chemistry

    What mass of Na2CrO4 is required to precipitate all of the silver ions from 71.0 mL of a 0.101 M solution of AgNO3?

    asked by Anonymous on October 18, 2013
  31. Statistics

    Suppose that a researcher wants to estimate a proportion P to within .02 with 95% probability. What is the minimum sample size required?

    asked by Alfonzo on March 19, 2016
  32. chemistry

    find the volume of 0.1 M hydrochloric acid required to react with 22.0ml of 0.07 M barium hydroxide

    asked by Allison on March 10, 2015
  33. engineering

    a particle falling under gravity falls 39m in certain second find time required to cover the next 30 m take g=9.8

    asked by Anonymous on September 6, 2012
  34. Economics

    Why is the money multiplier in the United States smaller than the inverse of the required reserve ratio?

    asked by Geminie on July 14, 2014
  35. Probality

    The probability that at most 3 tosses of a balanced dice are required to get a prime number on top is equal to????

    asked by Saya on February 21, 2012
  36. physics

    What coefficient of friction is required to stop a hockey puck sliding at 12.3 m/s initially over a distance of 38.7 m?

    asked by Anonymous on September 25, 2011
  37. AP Chemistry

    What mass of Na2CrO4 is required to precipitate all the silver ions from 96.0 mL of a 0.650 M solution of AgNO3?

    asked by Rahul on September 24, 2011
  38. Fcc

    Using the average 1/2-inch thickness, how many inches of shelf space will be required for 40,000 charts?

    asked by Wava on September 23, 2013
  39. chemistry

    how much heat is required to raise the temperature of a 35 gm block of aluminum from 125 to 322 degrees?

    asked by maryam on November 26, 2012
  40. college

    What is the concentration of a solution of HCL in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutralization?

    asked by Anonymous on April 15, 2010
  41. Economics/Money

    Suppose that banks today were required to keep 100 per cent reserves against their deposits. What would be the result?

    asked by Labz on April 21, 2012
  42. chemistry

    What volume at STP would be required to react with 0.100 mol of hydrogen to produce ammonia?

    asked by Anonymous on March 1, 2011
  43. chem

    I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

    asked by moe on October 25, 2010
  44. chemistry

    If 33.4 mL of the base are required to neutralize 11.1 mL of hydrobromic acid, what is the molarity of the potassium hydroxide solution?

    asked by Anonymous on May 2, 2012
  45. chem

    I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

    asked by moe on October 25, 2010
  46. geometry

    How many cubic meters of cement are required to cover a walkway 7 m long, 0.95 wide, and 10 cm deep?

    asked by wayne on February 13, 2013
  47. chemistry

    If 36.3 ml of 0.152M NaOH is required to neutralize 25.00 ml of an HC2H3O2 solution ,what is the molarity of the acetic acid?

    asked by HJ on September 11, 2012
  48. Biochemistry

    Calculate the mass (in g) of solid potassium hydroxide required to prepare: a) 1.75 litres of a solution with pH 11.5

    asked by Sarah on August 3, 2016
  49. physics

    a2kg hockey puck is sliding across the frictionless ice at 6m/s.how much force is required to keep it moving at 6m/s

    asked by lisa on May 2, 2012
  50. physics

    two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them?

    asked by Grane on November 4, 2012
  51. Chemistry

    How many milliliters of 3.0 M NaOH are required to react with 4.0mL of 16.0 M HNO3? ---> Not sure if I am solving correctly but I keep getting 21mL.

    asked by K on March 6, 2011
  52. physics

    two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them?

    asked by Grane on November 4, 2012
  53. math

    How much time required to fill the 1000litre water tank with 2 inch pipe How it calculate

    asked by vimalraj on March 19, 2017
  54. chemistry

    How much heat is required to convert 0.4 kilograms of ice at 0 degrees celsius to water at the same temperature?

    asked by Anonymous on March 1, 2011
  55. Adobe Photoshop

    List the steps required to be able to view each font to the selected type? I cant find the answers for that.

    asked by sami on September 24, 2017
  56. chemistry

    Calculate the mass of benzoic acid required to prepare 100cm3 each of 0.1m,0.25m, and 0.5m solutions

    asked by elamin on March 16, 2017
  57. chemistry

    calculate the mass of barium hydroxide required to prepare 2.0L of a 0.500mol/L solution. I got 342.64 g.

    asked by sharon on March 8, 2015
  58. chemistry

    How much heat in kJ is required to increase the temperature of an 87.0 g sample of water from 67oC to 136.6oC?

    asked by please help me(I have no idea what to do) on April 12, 2017
  59. Chemistry

    If 2.50 mol. of sodium chloride was required to make up a solution of a particular concentration, what mass would need to be measured out?

    asked by Deanna on March 20, 2015
  60. physics

    the force required to maintain an object at a constant velocity in free space is eaqual to?

    asked by john on February 20, 2013
  61. Chemistry

    What volume of Cl2 gas, measured at 687torr and 34∘C, is required to form 27g of NaCl?

    asked by Amy on April 6, 2014
  62. analytical chemistry

    What weight of potassium acid phthalate(KHC8H4O4) is required to react with 25 ml OF 0.5N NaOH solution

    asked by jeslf on April 28, 2015
  63. Physics

    What net external force is required to give a 35.7 kg suitcase an acceleration of 2.8 m/s2 to the right? Answer in units of N.

    asked by Brett on September 19, 2011
  64. more SAT grammar

    MUCH MORE experimental data ARE required BEFORE we can accept THIS THEORY. or NO ERROR which one of the caps is worng?? and whyy??

    asked by Hillary on October 13, 2008
  65. Health

    At what point during the course of treatment of a new patient should notice of use and disclosure of health information, required under HIPAA, be given and why?

    asked by Rachel on April 14, 2009
  66. ashworth

    A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis?

    asked by Anonymous on June 11, 2016
  67. Chemistry

    Need help with problem (Molarity) How many grams of NaOH are required to prepare 500.0mL of a 2.00 M solution?

    asked by JOY on March 19, 2013
  68. CHEM QUICK HELP

    Which of the following are correct statements? (Could be as many as 4) 1. Standard pressure is 101.3 atmospheres 2. One mole of gas contains 22.4 representative particles 3. One mole of gas always occupies 22.4 liters regardless of other conditions 4.

    asked by emily on April 11, 2013
  69. Chem II

    Which of the follwoing gives the molarity of 17.0% by mass solution of sodium acetate (molar mass = 82.0 g/mol) in water. The density of the solution is 1.09 g/mL. OK - I know that to figure molarity is moles divided by liters. This is confusing me because

    asked by Ken on June 4, 2008
  70. chemistry/math

    The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.0 ft 12.5 ft 7.3 ft? i made ft^3 into Liters and got 8,346,211.799 then I made the grams into kilograms and set

    asked by Hannah on August 19, 2012
  71. 12th grade chemistry

    It is required to titrate ethanol solution .Being available a 0.2mol/l potassium dichromate solution and 4mol/l sulfuric acid solution on the presence of a convenient indicator. a)indicate the glassware used for titration. b)give a brief description of the

    asked by andy on July 12, 2016
  72. Calculus Help Please Urgent!!!

    Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 3 s. The maximum rate of air flow into the lungs is about 0.3 L/s. This explains, in part, why the function f(t) = (3/10)sin(2πt/3) has

    asked by TANYA on May 1, 2014
  73. Chemistry

    1. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace(My answer) 2. A salt is obtained as a reaction between A. a nonmetal and a

    asked by Anonymous on September 27, 2011
  74. chemistry

    How much ethanol C2H50H in liters d = 0.789g/ml must be dissolved in water to produce 190.5 of 1.65M C2H50H? Molarity problem. My calculation 0.789g/ml x 1000ml/46.06 = 17.12M 17.12M = 190.05 x 1.66 17.12m = 314.325 x= 314.325/17.12 x=18.36 I am not sure

    asked by Fai on August 11, 2012
  75. Chem2

    At 25C, the concentration of lead(II) sulfate in a saturated aqueous solution is 7.9 x 10^-M. Determine the volume, in liters, of saturated solution of lead(II) sulfate that contains 1.0g of lead(II) sulfate.

    asked by Izzyrun on September 12, 2014
  76. math

    A water tank will be drained at a constant rate of 42.4 liters per hour starting at 9:00 A.M. After one hour, the change in the amount of water in the tank can be represented as –42.4. Which of the following represents the total change in the amount of

    asked by john on October 7, 2015
  77. math

    a cubic container was completely filled with water. when 3/4 of the water from the container was poured into a rectangular tank, the tank became 1/4 full. the capacity of the tank is 1.024 liters more than that of the cubic container. Find the length of

    asked by stacy on April 17, 2015
  78. CHEM

    Air is approximately 80% nitrogen and 20% oxygen (on a mole basis). If 6 g of hydrogen is added to a 22.4 liter maintained at 0 degrees c and initially filled with air at 1 atm pressure, what will be the molecular mass (i.e. the average molecular mass) of

    asked by Jessica Lynn on January 7, 2007
  79. Earth Science

    Seismic waves move faster through which of the following media? a.) water b.) steel c.) oxygen d.) oil Please answer my study guide is due Monday and the teacher hasn't gone over this I looked through my notes and everything. It would really help if you

    asked by ? on January 12, 2013
  80. Chemistry

    A compound containing only carbon, hydrogen and oxygen is subjected to elemental analysis. Upon complete combustion, a .1804g sample of the compound produced .3051g of CO2 and .1249g of H2O. What is the empirical formula of the compound?

    asked by Brian on March 14, 2013
  81. Chemistry

    The combustion of methanol (CH3OH) forms carbon dioxide and water vapor. A combustion reaction refers to a reaction of a substance with oxygen gas. What is the balanced equation?

    asked by Anonymous on October 10, 2017
  82. chemistry

    i have the Mr of lead nitrate 331 and i thermally decompose it giving nitrogen dioxide and oxygen. i want to collect exactly 200cm3 of the gases evolved in a syringe. what mass of lead nitrate should i take ?

    asked by linda on June 30, 2011
  83. chemistry

    Combustion analysis of 1.0g of a compound containing carbon , hydrogen and oxygen gives 2.3 g of carbon dioxide and 0.93g of water . If The relative molecular mass is 58. Calculate The empirical and molecular formula

    asked by hiedi on September 20, 2015
  84. chemistry

    how do u draw the lewis structure for something like CO -2 over 3. do u add 2 electrons on to the oxygen when yur finding the number of valence electrons cuz that's wat i thought u did but then i got all those questions wrong so wat do u do

    asked by michelle on October 4, 2007
  85. chemistry

    I have posted this once and still cannot get the correct answer. Determine the mass of carbon monoxide that is produced when 45.6 of methane, CH4, react with 73.2 g of oxygen , O2. The products are carbon monoxide and water vapour.

    asked by Kelsey on August 3, 2010
  86. Chemistry

    which is an example of physical change 1.water decomposing into hydrogen and oxygen 2.potassium and bromine combining to form potassium bromide 3.solid ice melting into liquid water 4.none of the above i think its 3.

    asked by jessica on November 28, 2010
  87. Science

    1. The process of nitrogen fixation uses oxygen to produce carbon dioxide- false? 2. While a pyramid of numbers or biomass can be inverted, a pyramid of energy cannot- false? are my answers correct?

    asked by Bethany on October 2, 2014
  88. Chemistry

    Oxygen has a boiling point of 90K, and nitrogen has boiling point of 77K. Which is a liquid and which is a gas at 80K? I tried to look into the phase diagrams, but I still don't understand. Can somebody please help and explain to me??? THANKS A LOT!!!

    asked by Cynthia on July 10, 2011
  89. Chemistry

    When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form? Which reactant is in excess, and how many grams of it remain after the reaction?

    asked by Jasmine on September 27, 2009
  90. stoiciometry (chemistry)

    calculate the theoretical yield of Cu when 53.2g Cu2S react with oxygen. (balanced equation is CU2S+02>2Cu+S02) Please help me figure this homework out. I just dnt get how to get the theoretical yeild. I want to know to be able to do the rest right. Thanks

    asked by lila on April 15, 2013
  91. Chemistry

    When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form? Which reactant is in excess, and how many grams of it remain after the reaction?

    asked by Jasmine on September 29, 2009
  92. Biology

    Which organ systems help deliver oxygen to body cells? I think that its the enodcrine and lymphatic systems the other choices are A.respitory and excratory B.muscular and immune systems C.respiratory and circulatory systems

    asked by Connor on May 20, 2015
  93. biology lab

    how to know from the experiment if the oxygen produced as a result of carbon fixation or electron transport? my experiment result show that average bubble/min for tap water is 4.7 while NaHCO3 is 1.8.

    asked by Yuni on July 31, 2011
  94. Science

    Assuming all volume measurements are made at the same temperature and pressure, what volume of hydrogen gas is needed to react completely with 3.75 L of oxygen gas to produce water vapor?

    asked by James on April 18, 2015
  95. college chemistry

    A closed container is filled with oxygen. The pressure in the container is 325 . What is the pressure in millimeters of mercury?

    asked by Tiffany on July 7, 2010
  96. chemistry

    5.6g of organic compound on burning with exess oxygen gave 17.6g of CO2 and 7.2g of H2O .the organic compound

    asked by Anonymous on February 1, 2015
  97. physical science

    4.8g of magnesium react was completely burned in oxygen and magnesiumoxide was produced. what is the mass of magnesium produced?

    asked by Ruben Amwenyo on November 8, 2016
  98. Chem 130

    How many grams of Aluminum oxide will be produced when 2.44 grams of Aluminum burns in air (i.e. react with Oxygen)?

    asked by michelle on October 29, 2014
  99. Chemistry

    If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

    asked by Kayla on April 30, 2016
  100. Chemistry 111

    calculate the number of moles of magnesium, chlorine, and oxygen atoms in 8.80 moles of magnesium perchlorate?

    asked by kee on July 14, 2011