1. College Algebra

    Hello Steve, it didn't work for "t" i can't get the actual value... Find the time required for an investment of 1 dollars to grow to 7200 dollars at an interest rate of 7.5 percent per year, compounded quarterly

    asked by Chris on July 25, 2014
  2. Chem

    The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?

    asked by Nad on September 27, 2016
  3. science

    My apology. I posted the previous question in correctly. Here is the question again: To bring 100cc of water from 20C to 75C, in 1min 25 sec, with 650Watt of energy input, what is the temperature required?

    asked by CM on November 15, 2012
  4. Health

    If you were addmitted to the hospital with a heart attack and also hypertension and both required monitoring during your inpatient stay. The hypertension would be considered what ? 1.the pricipal diagnosis 2. a complication 3. the principal procedure 4. a

    asked by Abby on March 10, 2008
  5. Engineering

    Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.

    asked by David on February 13, 2009
  6. chemistry

    Moles chemistry? Calculate the mass of solute required to prepare ib the solution 200cm^3 of solution containig 0.50 mol dm ^-3 cl-iond prepared by dissolving cacl2.6h2o in water.

    asked by joanna on December 8, 2016
  7. math 106

    what amortization payment would be required every month, at 12% interest, to pay off a $125,000 mortgage in 10 years? round your answer to the nearest cent. can you work the steps to this problem for me so i can see the problem clearly?

    asked by lindaemory on December 5, 2012
  8. Chem

    The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?

    asked by Nad on September 27, 2016
  9. Physics

    If you suspend a 90-N rock beneath the surface of ethanol, the tension required to support it is only 60 N. What volume of ethanol (density of 789.2kg/cubic meter) must therefore be displaced? Show your work.

    asked by Lenny on February 7, 2017
  10. criminal justice

    The presentence investigation report (PSI) a. reflects positive school interest in the offender B. is based on the concept of parens patriae C. is required in all jurisdictions D. reflects a classical approach E. none of the above

    asked by Fernandez on November 4, 2015
  11. Chemistry

    What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? [Show work]

    asked by Melissa on February 12, 2014
  12. Physics

    What is the magnitude of the average force required to stop an 1500kig car in 8.0 s if the care is traveling at 95 km/h? Formula: Sigma F= ma *convert 95km/h to 26m/s Which kinematic equation do I use and for which variable do I use within the equation?

    asked by Mr. McKee on June 11, 2012
  13. algebra 2 review

    A training ring for horses is an oval formed from a rectangle with two semicircles on either end. Rounded to the nearest foot, how many feet of fencing is required to surround the entire ring with a fence?

    asked by Beth on April 28, 2011
  14. chemistry

    The equilibrium bond length of 1 H35Cl is 126 pm. What is wavelength of the required electromagnetic radiation to excite the rotational state from j=1 to j=2? The masses of 1H and 35Cl are 1.0078 amu and 34.9689 amu, respectively)

    asked by StressedStudent on March 10, 2013
  15. chem

    help, i'd like to know how to do this titration question: for example: 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. thank

    asked by Alex on April 21, 2008
  16. math

    Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

    asked by KiKi on April 25, 2010
  17. Chemistry

    The approximate concentration of hydrochloric acid, in the stomach is 0.17M .calculate the mass of the following antacids required to neutralize 50mL of this acid; 1.) bicarbonate of soda, NaHCO3 2.) aluminum hydroxide, Al(OH)3

    asked by Katie on November 16, 2017
  18. Statistics

    n=1000, bell-shaped Mean - 5,000 ~950 lie +/-100 of 5000 -4900 to 5100 Required 1) Standard Deviation 2) 97.5th percentile value 3) Z-score for 16th percentile

    asked by Rhea on September 26, 2010
  19. Chemistry

    What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle? HCl(aq)+NaHCO3(aq)=>NaCl(aq)+CO2(g)+H2O(l)

    asked by Mateo on April 14, 2011
  20. business math

    I'm trying to solve this problem: What sinking fund payment would be required at the end of each three-month period, at 8% interest compounded quarterly, in order to amount to 20,000. I just need to know how to work the problem correctly.

    asked by Valerie on January 15, 2011
  21. physics imperfect spring

    The force required to compress an imperfect horizontal spring an amount x is given by F= 150x+12x^3, where x is in meters and F in newtons. If the spring is compressed 2.1 m, what speed will it give to a 4.0 kg ball held against it and then released?

    asked by annie on May 22, 2009
  22. Chemistry

    For a tablet containing 500mg vitamin C, Calculate how many mL of 0.095M NaOH are required for titration ( molar mass of ascorbic acid- vitamin c is 1.76.12g/mol) I am not sure of the conversions to use, how to get started with the question.

    asked by Cody on October 13, 2014
  23. Chemistry

    A minimum energy of 151 kJ is required to dissociate a mole of iodine molecules, I2. Calculate the wavelength of radiation that supplies this energy, assuming each bond beaks by absorbing one photon.

    asked by Victor on November 29, 2016
  24. math-please help!

    Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

    asked by KiKi on April 26, 2010
  25. physics

    If a 648 N body on a carpeted surface has a μs of 0.86 and a μk of 0.68, what amount of force will be required to start dragging the body across the floor? Make sure to report your answer with the correct number of significant figures

    asked by Linda on November 5, 2014
  26. Income tax

    Catherine purchased furniture and fixtures (7-year property) for her shop for $80,000 in May 2013. What AMT depreciation adjustment is required in 2013? A. $0 B. $2,864 C. $8,568 D. $11,432 The answer is A?

    asked by Anthony on June 30, 2016
  27. physics

    How much heat, expressed in Kwh, is required to raise the temperature of water in a 20,000 gallon pool by 10 degrees C. ? This is a real world question, I'm 18 years old and I service my neighbors pool.

    asked by Wolter on April 30, 2013
  28. Chemistry

    The question says: when .422 g of phosphorus is burned, .967 g of a white oxide is obtained. Determine the empirical formula of the oxide. I did the calculations and got that there would be 1 mole Phosphorus and 4.29 mol Oxygen. To get the empirical

    asked by Amelia on September 28, 2015
  29. Chemistry

    a tank contains a mixture of 3.0 mol of nitrogen gas, 2.0 mol of oxygen gas and 1.0 of carbon dioxide gas at 25 degrees celsius and a total pressure of 10.0 atm. Calculate the partial pressure in torr of each gas in the mixture?

    asked by Elizabeth on July 11, 2011
  30. chem

    A 75.0 L stainless steel container was charged with 3.00 atm of hydrogen gas and 4.00 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at 25°C? in atm What is the pressure in the tank at 125°C? in atm

    asked by mel on November 18, 2007
  31. CHEMISTRY

    1.A scuba diver's tank contains 0.29 kg of O2 compressed into a volume of 2.3 L. a)Calculate the gas pressure inside the tank when the temperature is 9oC. b)calculate the volume of oxygen if the temperature is 26oC and the pressure is 0.095 atm.

    asked by irfan on June 6, 2013
  32. Chemistry

    Maleic acid is an organic compound composed of 41.39% C, 3.47% H, and the rest oxygen. If 0.271 mol of maleic acid has a mass of 31.4 g, what are the empirical and molecular formulas of maleic acid? So I checked the problem again, and yes this is the whole

    asked by Anonymous on April 16, 2010
  33. English

    I need you to check these sentences for me on Prospero and Caliban. I'm not sure about the tense choice (can you say that)? 1) Caliban hopes that they both Prospero and Miranda get drenched with a dew as evil as the kind his mother used to collect with a

    asked by Mike on April 10, 2011
  34. CHEMISTRY

    Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert

    asked by Allie on September 30, 2013
  35. CHEMISTRY

    Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert

    asked by Allie on September 30, 2013
  36. Biology!!!!

    Which blood vessel contains blood that has high oxygen concentration, low carbon dioxide concentration, and high pressure? 1. aorta 2. pulmonary artery 3. pulmonary vein 4. vena cava I wrote the answer as 3, but is wrong. Which one is the correct answer?

    asked by Marrion on October 13, 2009
  37. 8th Grade Chemistry

    This is from the Glencoe book Chemistry, Book L. Unlike sodium and chlorine, some atoms becomre more stable by sharing_______, forming______________rather than charged__________. The bonds in a molecule of oxygen are _______ _______ bonds, while the bonds

    asked by Eric on November 15, 2011
  38. physics

    a truck with a mass of 2100 kg travels at a constant speed of 75 km/h. (a) What is the magnitude of the truck’s linear momentum? kg·m/s (b) What average force would be required to stop the truck in 7.5 s? does this have to do with f=ma or not? help

    asked by ricchie on December 15, 2012
  39. physics

    I am posting this question again as noone has answered it yet. State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a= -6.75D? b= -5.75D? c= -4.75D?

    asked by Please help if you can... on October 24, 2012
  40. physics

    You accelerate your 1500 Kg car from 2 m/s to 12 m/s in 2 seconds. How do you determine the cars acceleration initial momentum final momentum change in momentum the force required to do this?

    asked by Kelley on January 11, 2016
  41. Chemistry

    a titration experiment 20 mL solution of hydrochloric acid required 15.2mL of a .879 M barium hydroxide solution. What was the molar concentration of the HCl solution?

    asked by Chris on October 12, 2011
  42. Chemistry

    The thermite reaction was used to weld rail ties together. If 15.0 grams of aluminum were used, how many grams of ferric oxide would be required? How many grams of molten iron would forma?

    asked by Step on November 23, 2014
  43. Physics

    A load of 59 N attached to a spring hanging vertically stretches the spring 5 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?

    asked by Maleka on November 22, 2012
  44. ethics

    Peter Singer argues that giving money to famine relief is: a. Morally permissible. b. Morally forbidden. c. Morally required. d. Supererogatory. my answer is a

    asked by need help please check my answer on February 28, 2014
  45. chemistry

    How much energy is required to decompose 765 g of PCl3, according to the reaction below? The molar mass of PCl3 is 137.32 g/mol and may be useful. 4 PCl3(g) → P4(s) + 6 Cl2(g), ΔH°rxn = +1207 kJ

    asked by yr on April 28, 2011
  46. chem

    What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p

    asked by Sara on September 21, 2010
  47. science

    The driver of an 800.0 kg car decides to double the speed from 25.0 m/s to 50.0 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?

    asked by veeda on June 29, 2013
  48. Physics

    A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?

    asked by Kristen on November 23, 2010
  49. Physics

    A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?

    asked by Kristen on November 23, 2010
  50. Chemistry

    When methane is combusted with excess oxygen 891 kJ of energy is produced start with 100g of methane. how much energy is produced? is this reaction endothermic or exothermic? Also provide enthalpy change for this reaction: CH4 + 2O2 (arrow)= CO2 + H2O +

    asked by Al on October 19, 2015
  51. chemistry

    Ethanol (C2H6O) is combusted with oxygen to produce carbon dioxide and wateraccording to the following reaction: C2H6O + 3O2 -----> 2H2O + 3CO2 If 50g of ethanol is combusted, determine the volume of carbon dioxide that will be produced if the temperature

    asked by Jennifer on August 4, 2012
  52. chemistry(oxidation)

    ok,I really don't understand the whole oxidation numbers thing my question is state the oxidation number for nitrogen in the following NH3= -3 NO2-1= -1 N2= 0 NO2Cl= 5 N2H4 -2 am I correct? NH3= -3 NO2-1= -1 No, oxygen is -2, so N is +3 N2= 0 NO2Cl= 5 N2H4

    asked by mike on May 17, 2007
  53. chemisrty

    The ionic compound sometimes called uranium yellow is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, and 17.664% oxygen. What is the empirical formula for this compound? This compound has a molecular mass of 1268.06

    asked by tash on November 10, 2014
  54. chemistry

    3. Use the ratio of stoichiometric coefficients in the reaction above to determine how many moles of O2 will react with the H2 available. Then, use molar mass to convert the moles of O2 into grams. For the reaction 2H2 + 1O2 =2H2O, there are 8.08 grams of

    asked by feather on September 13, 2014
  55. chemistry

    The sodium and hydroxide atoms separate into ions and the positive sodium ions are attracted to the oxygen atoms and the hydroxides are attracted to positive charged part of water, the hydrogen making another molecule.

    asked by johnny on May 1, 2011
  56. chem

    A hydrogen-oxygen fuel cell operates on the simple reaction given below. H2(g) + 1/2 O2(g) H2O(l) If the cell is designed to produce 1.8 A of current, and if the hydrogen is contained in a 2.9 L tank at 200. atm pressure at 25°C, how long can the fuel

    asked by sarah on April 19, 2013
  57. Chemistry

    A)What mass of carbon dioxide is produced from the complete combustion of 7.00×10−3 g of methane? B)What mass of oxygen is needed for the complete combustion of 7.00×10−3 g of methane?

    asked by Hannah on October 4, 2011
  58. chemistry

    Are the characteristics or properties of the elements making up a compound different from the characteristics or properties of the compound? For example, are the properties of oxygen and hydrogen different from the properties of water? Explain.

    asked by anonymous on October 13, 2014
  59. Chemistry

    Calculate the number of moles of molecules in 20.11 g of oxalic acid. H2C2O4 calculate the number of oxygen atoms in 20.11 g of oxalic acid

    asked by same on September 30, 2011
  60. Math

    A jug can hold 3 times as much juice as a mug if the jug can hold 2 L of juice how much juice in liters can the mug hold

    asked by Alfred on July 18, 2017
  61. CHemistry

    im not sure how u solve these types of problems... How many moles of NaOH are contained in 200ml of a 0.1M of NaOH? How many grams of NaOH are contained in 500ml of a .5M solution of NaOH? A 0.1 M solution has 0.1 moles of the solute NaOH per liter. You

    asked by Phil on April 22, 2007
  62. CHEMISTRY

    Use the following balanced chemical equation to calculate the mass of carbon dioxide produced from the burning of 5.50 kg of jet fuel which can be represented by the molecule C12H26. You should quote your answer to 3 significant figures in units of kg. The

    asked by trigger on December 28, 2008
  63. Chemistry! urgent

    what volume of gas at 40°C and 1.50 atm is necessary to react with 300 L of hydrogen gas measured at the same conditions? 2H2 (g) + O2 (g) --> 2H20 (g) 1.50 atm= 151.KPa How would I solve this? Because I can't use: PV = nRT I have pressure, temperature,

    asked by Sarah on January 11, 2018
  64. chemistry

    use a combustion reaction of liquid ethanol( C2H5OH) an air as a source of work, assuming T=25 celcius, air pressure is 1 atm, and all products are gases with partial pressure of 10 atm each. How high can one lift a 1000 kg weight by burning 100 g of

    asked by Whitney on November 8, 2010
  65. chemistry help

    An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH =

    asked by Tymee on October 22, 2012
  66. chemistry help

    An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction: 2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g) dH =

    asked by Tymee on October 21, 2012
  67. English

    Look at the children swimming in the river on the top right side. You shoud not let the children swim in the river by themselves. Look at the two people who are pitching the tent. It is a little dangerous to pitch a tent near a river. If it rains, they

    asked by John on June 17, 2009
  68. chemistry

    Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen, and methane. 2 NH3(g) + 3 O2(g) + 2 CH4(g) 2 HCN(g) + 6 H2O(g) If 5.00 x 10^3 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced,

    asked by lyne on February 2, 2009
  69. chemistry

    What happens when : (give balanced chemical equations only) 1. Caustic soda reacts with carbon dioxide 2.caustic soda reacts with zinc hydroxide 3.potassium reacts with oxygen 4.sodium carbonate is fused with silicon dioxide 5. when bleaching powder reacts

    asked by paula on March 10, 2010
  70. Chemistry

    So we have a question for chem. homework and i really don't understand. can you please explain it..... Question:There is a change in the type of oxides formed with the period three elements. Indicate the type of compounds formed (ionic, amphoteric,

    asked by Karina on May 17, 2008
  71. Chemistry

    A gaseous mixture containing 4.15 mol of hydrogen gas and 7.13 mol of oxygen gas reacts to form steam (a) Write the balanced equation for the reaction. (b) What is the limiting reactant? (c) What is the theoretical yiels of steam in moles? (d) How many

    asked by Jao on August 22, 2010
  72. Chem (Help!)

    I need help in using gas laws to solve problems. I need help with this question: What is the pressure in atmospheres exerted by a 0.500 mol sample of oxygen gas in a 10.0 L container at 298 K? Also what formula would I use to solve the pressure in this

    asked by Lisa on April 29, 2008
  73. Gerunds in Phrases

    Each of the following sentences contains one gerund. Underline the gerund in each sentence. Then write whether it is used as a subject, direct object, predicate noun, or object of a preposition. 1. Walking is excellent exercise. Gerund: Walking - Subject

    asked by Please check answers! on March 13, 2017
  74. Physics

    A spring has a spring constant of 42 N/m. How much work is required to stretch the spring 1.5 cm from its equilibrium position?

    asked by Kels on October 4, 2011
  75. chemistry

    An orgnaic compound contains C, H, No, and O. Combustion of 0.1023 g of the compound in excess oxygen yielded 0.2766 g of CO2 and 0.991g of H2O. A asample of 0.4831 g of the compound was analyzed for nitrogen by the Dumas method. At STP, 27.6 mL of dry

    asked by kaliegh on December 9, 2007
  76. Chemistry

    The decomposition of ozone may occur through the two-step mechanism shown below: step 1 O3 ----> O2 + O step 2 O3 + O ---> 2O2 The oxygen atom is considered to be: a catalyst or reaction intermediate? How am I supposed to be able to tell the difference

    asked by Marcus on February 19, 2013
  77. Chem

    Epsom salts consist of magnesium sulfate heptahydrate. Write its formula. a) How many atoms of oxygen are in 5.15g of Epsom salts? b) How many formula units of the compound are present in 5.15g? c) How many moles of water molecules are in 5.15 g of Epsom

    asked by Erica on October 7, 2011
  78. chemistry

    In 1774 Joseph Priestly conducted one of his most famous experiments which lead to a method for the preparation of oxygen. The experiment involved heating a sample of mercury II oxide with a large lens. The equation for this reaction is shown below:

    asked by lissa on November 2, 2011
  79. chemistry

    At room temperature pure water has a density of 1.00 g/ mL. What mass of water (in grams) will fit into a container if 1.00 lb. of mercury completely fills the container? Okay, here is what I solved so far. Let's say H2o equals water and Hg equals mercury=

    asked by Amy on April 8, 2010
  80. CHEMISTRY...

    1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)-->CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be

    asked by Anonymous on January 13, 2013
  81. Chemistry

    Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) → 2Na(s) + 3N2(g) Part A What

    asked by keitanako on March 19, 2014
  82. Chemistry Urgent

    Assuming that kerosene is C11H24, calculate the standard enthalpy change when 1 mole of kerosene burns completely in oxygen, using the data below: ΔH of formation of C11H24(l) = -327 kJ mol ΔH of formation of CO2(g)= -394 kJ mol ΔH of formation of H2O

    asked by Ava on March 10, 2014
  83. chemistry

    3. When a mixture of 10.0 grams of acetylene (C2H2) and 10.0 grams of oxygen (O2) is ignited, the resulting combustion reaction produces CO2 and H2O. A) Write a balanced equation for this reaction. B) What is the limiting reactant? C) How many grams of C2,

    asked by tra on May 14, 2013
  84. Chemistry

    Been stumped on this problem for a day now. 2KClO3-->2KCl+3O2 a) If 53.0g of potassium chlorate breaks down, what volume of oxygen is produced? For this one I got: 14.6L O2 b) How many grams of potassium chloride are produced from problem a? For the life

    asked by Johnny on November 12, 2017
  85. chem/phys

    Calculate the number of H2O molecules in a human body of mass 66.5 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.) 1

    asked by opp on April 25, 2012
  86. Chemistry

    What partial pressure of oxygen above the water (in atmospheres at 0 C ) is needed to obtain this concentration? The solubility of O2 in water at 0 C and 1 atm partial pressure is . 2.21 x 10^-3 mol/L Concentration needed is 4mg/L Stuck and need help,

    asked by Joe on September 21, 2014
  87. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide? b. How many grams of oxygen are needed to react to form the 1.5 X 10^-2 grams moles of carbon dioxide?

    asked by John on November 10, 2016
  88. Chemistry

    Very confused! Converting between grams of a compound and grams of a constituent element Determine the mass of oxygen in a 5.8 g of NaHCO3 5.8 g NaCHO3 * 1 mol NaCHO3/ 84.01 NaCHO3 * 48.00 mol O / 1 mol NaCHO3 * 16.00 g O/ 1 mol = I got 53 but the answer

    asked by Monique on September 23, 2011
  89. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide? b. How many grams of oxygen are needed to react to form the 1.5 X 10^-2 grams moles of carbon dioxide?

    asked by John on November 10, 2016
  90. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide? b. How many grams of oxygen are needed to react to form the 1.5 X 10^-2 grams moles of carbon dioxide?

    asked by John on November 10, 2016
  91. Physics

    Calculate the number of H2O molecules in a human body of mass 65.9 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)

    asked by Steve on April 27, 2014
  92. Biology

    20. When the blood enters the gill filaments in a fish, its carbon dioxide content is ________ and oxygen content is _____ a. low;high b. low;low c. high;high d. high;low D? I'm not sure about this question... Thanks -MC

    asked by mysterychicken on March 18, 2010
  93. physics

    Calculate the number of H2O molecules in a human body of mass 50.6 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)

    asked by kira on April 13, 2013
  94. CHem

    How many oxygen atoms do you have in 2.00 grams of calcium phosphate? My answer is 3.9*10^22 by multiplying avogadros number by (2/31) Am I close? How many Ca^2+ ions do you have in 2.00 grams of calcium phosphate? I am getting 39, am i close? since there

    asked by Josh on August 5, 2009
  95. Chemistry

    Use the experimental molar mass to determine the molecular formula for compounds having the following analyses. A. 41.39% carbon, 3.47% hydrogen, 55.14% Oxygen; experimental molar mass 116.07 I got C4H4O4 as the molecular formula. Can someone check this

    asked by Chopsticks on January 25, 2009
  96. Shelled marine organisms

    How do the shelled marine organisms contribute to the carbon cycle? They contribute to the carbon cycle by releasing carbon dioxide back into the atmosphere by converting carbohydrates and oxygen into carbon dioxide and water.

    asked by Amanda on July 7, 2010
  97. CHEM

    Butane, C4H10, is a component of natural gas that is used as fuel for cigarette lighters. The balanced equation of the complete combustion of butane is: 2C4H10(g) + 13O2(g)->8CO2(g) + 10H2O(l) At 1.00atm and 23*C , how many liters of carbon dioxide are

    asked by K on October 29, 2007
  98. chemistry

    When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 4.8 M is required to react completely with 2.60 g of magnesium?

    asked by Anonymous on January 19, 2015
  99. physics

    given that the mass of an electron is 9.1 x 10^-28 grams and the charge on an electron is 1.6 x 10^-19 Coulombs, calculate the voltage required to lift an electron 5 cm. the question was previously answered, but I did'nt understand it .. could some show me

    asked by Martin on May 20, 2012
  100. Calc II

    A worker on scaffolding 65 ft above the ground needs to lift a 390 lb bucket of cement from the ground to a point 20 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required?

    asked by Liz on October 16, 2012