chem

Popular questions
  1. chem

    6) How many significant figures should be retained in the result of the following calculation? 12.00000 x 0.9893 + 13.00335 x 0.0107 A) 2 B) 3 C) 4 D) 5 I thought it was 3, but it is 4. Can you please explain to me

    asked by Loi on March 11, 2009
  2. Chem

    Order the elements S, Cl, and F in terms of increasing atomic radii. I thought the answer was F, S, Cl, but the answer key said it was S, F, CL Why? AR decreases from left to right. Sulfur has one more energy level, so shouldn't its atomic radii be greater

    asked by Matt on June 6, 2008
  3. CHEM

    Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? anwer I got: molarity of luminol

    asked by K on October 18, 2007
  4. chem

    An unknown sample was crystallized from benzene. on cooling to 0 degree centigrade in an ice bath the amount of crystals in flask was quite large, but much of it seemed to disappear when an attempt was made to collect it by suction filtration. Explain?

    asked by abuudharr on April 29, 2015
  5. CHEM

    At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

    asked by Akle on February 10, 2012
  6. chem

    Which of the following elements would you expect to gain electrons in chemical changes? (Select all that apply.) gold chromium zirconium nitrogen iodine

    asked by Sara on September 21, 2010
  7. Chem

    In the aqueous solution of H2SO4 its mole fraction is 0.2 then closest value of molality of solution is (1) 13.9 (2) 9.8 (3) 10.2 (4) 11.2

    asked by Naman on March 16, 2016
  8. chem

    draw the lewis structure for NO2- including any valid resonance structures. which of the following statements are true? a. the nitrite ion contains 2 N-O bonds that are equivalent to 1 1/2 bonds. b. the nitrite ion contains 2 N=O double bonds c. the

    asked by natash on May 1, 2008
  9. CHEM

    A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.8635 g of CO2 and 0.1767 g of H2O. What is the empirical formula of the compound? i got C3H3O2 IS IT RIGHT?

    asked by shane on March 14, 2013
  10. Chem

    2HNO3(aq) + Sr(OH)2(aq) --> 2H2O(l) + Sr(NO3)2(aq)? Write the net ionic equation, including the phases. 2H^+(aq) + 2OH(aq) ---> 2H2O(l) Am I correct?

    asked by Alex on October 22, 2015
  11. chem

    choose the compound below that contains at least one polar covalent bond, but is nonpolar a. ICl3 b SeBr4 c. CF4 d. HCN Im stuck between C and D C is a tetrahedral which has no net dipole so is non polar, and D is linear which also makes it non polar.

    asked by natash on May 1, 2008
  12. chem

    A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.30 nm. It then gives off a photon having a wavelength of 384 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.

    asked by Anonymous on October 19, 2013
  13. Chem

    Bromine has two natural occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. The mass of Br-81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br-79.

    asked by Davis on August 28, 2011
  14. Chem

    How is the light emitted by an atom related to its electron configuration? A Light is produced when an electron moves from a higher to a lower energy level. The color of the light (as we see it) depends on the amount of energy emitted by the electron. B

    asked by Anonymous on June 11, 2020
  15. Chem

    How many grams of N2 are produced when 125g of NH3 reacts by the following? 4NH3+6NO--->5N2 +6H20 I know the answer but I do not know how to do the problem. The answer in the book is 257g But what do I do? I am not even sure where to start? Thanks

    asked by Connie on October 1, 2011
  16. CHEM

    A concentrated weak acid is best described as which of the following? (a) a solution with a high pH (b) a solution where the concentration of undissociated acid particles is high and relative quantity of hydronium ions is low (c) a solution where the

    asked by Lena on July 24, 2009
  17. Chem

    A sealed container holding 0.0255 L of an ideal gas at 0.989 atm and 71 °C is placed into a refrigerator and cooled to 45 °C with no change in volume. Calculate the final pressure of the gas.

    asked by Rachel on March 7, 2018
  18. Chem

    A solution of H2SO4(aq) with a molal concentration of 8.01 m has a density of 1.354 g/mL. What is the molar concentration of this solution?

    asked by Jhanvi on February 19, 2013
  19. Chem

    Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100

    asked by Jason on November 7, 2010
  20. Chem

    How do I Balance the equation. HC2H3O2(aq)+Ca(OH)2(aq)→H2O(l)+Ca(C2H3O2)2(aq)

    asked by Paul on August 16, 2013
  21. CHEM

    What are the expected bond angles in ICl4+ (or) ICl_4^+ ?? I think that I have the stucture drawn correcty: I is the central atom with one lone pair above it. I then have the Cl's with 6dots around them & then bonded, singly, to the "I". Two "Cl's" go

    asked by K on November 26, 2007
  22. Chem

    Consider the balanced chemical equation: 3Sr(OH)2(aq) + 2H3PO4(aq) → Sr3(PO4)2(s) + 6H2O(l). How many moles of Sr(OH)2 remain if 0.10 mol of H3PO4 react with 0.40 mol of Sr(OH)2?

    asked by Mike on August 20, 2011
  23. Chem

    What is the enthalpy for the following reaction? overall: C2H4+H2O--->C2H5OH is -1411kJ correct??

    asked by Angel on November 4, 2010
  24. CHEM

    Which statement best describes the polarity of SF_4Cl_2?? (or: SF4Cl2, if that helps more) 1. Always polar. 2. Always nonpolar. 3. Depending on the arrangement of outer atoms, this molecule could be polar or nonpolar. & how can you tell for certain??? I

    asked by K on November 26, 2007
  25. CHEM

    For a molecule of fluorous acid, the atoms are arranged as HOFO. What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed. For this question I tried entering: +1,-2,+3,-2 and it was wrong...as was:

    asked by K on November 26, 2007
  26. Chem

    what mass of NaCl is contained in 24.88g of a 15% by mass solution of NaCl in water?

    asked by Anonymous on October 13, 2014
  27. chem

    Consider the fermentation reaction of glucose: C6H12O6 ----) 2C2H5OH+2CO2 A 1.00-mol sample of C6H12O6 was placed in a vat with excess yeast. If 35.1 g of C2H5OH was obtained, what was the percent yield of C2H5OH?

    asked by shane on March 14, 2013
  28. CHEM

    The mass of a golf ball is 45.9g. If it leaves the tee with a speed of 72.0 m/s, what is its corresponding wavelength? Express your answer numerically in meters. Would the correct answer be: lambda=h/mv lambda=6.626*10^-34/(45.9g)(72.0m/s)

    asked by K on November 5, 2007
  29. Chem

    Write a chemical formula. . . Ca2+ and S2-

    asked by David on July 30, 2016
  30. Chem

    In a 1.0x10^-6 M solution of HNO3(aq) at 25 degrees C, identify the relative molar amounts of species from most to least. HNO3 H3O+ H2O OH- NO3-

    asked by Mer on February 20, 2014
  31. Chem

    The combustion of propane (C3H8) produces CO2 and H2O: C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g) The reaction of 3.5 mol of O2 will produce ________ mol of H2O.

    asked by Agum on February 17, 2017
  32. chem

    Classify as a strong, weak, or non electrolyte. FeCl2, HBr, HCN, CaCO3. I put FeCl2 and HBr as strong, HCN as weak and CaCO3 as non.

    asked by Anonymous on November 28, 2011
  33. CHEM

    Arrange the elements in decreasing order of the number of valence electrons Br,S,Sb,Sr,F,Mg,I,Ca,Na,Kr,Xe,Bi,Ge,Ga,K

    asked by M on September 5, 2014
  34. Chem

    What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C? I think you take 8.5g x 21 degree C, but then I am stuck. Thank you

    asked by Connie on September 10, 2011
  35. Chem

    It is possible to determine the ionization energy for hydrogen using the Bohr equation. Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from n=1 to n=infinity. I don't know how to solve this

    asked by Jeimmy Vinueza on March 6, 2014
  36. CHEM

    My balanced equation is: a) 2C8H18(g) + 25O2(g) -> 16CO2(g) + 18H2O(g) b) 0.290 mol of octane is allowed to react with 0.670mol of oxygen. Which is the limiting reactant? (((Which I found Oxygen to be the limiting reactant.))) I do not understant how to

    asked by K on October 15, 2007
  37. CHEM

    A) a picture shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00atm , 20.0 *C, and 1.00L. (The pic is of a 2L container which has a piston pushed downward to the 1L level. Under the piston, under the

    asked by K on October 28, 2007
  38. chem

    The concentration of a benzene solution prepared by mixing 12.0 g C6H6 with 38.0 g CCl4 is__________ molal.

    asked by jessie on September 15, 2010
  39. chem

    the half life of oxygen-15 is 124 s. if a sample of oxygen-15 has an activity of 4000 Bq, how many minutes will elapse before it reaches an activity of 500Bq

    asked by Anonymous on June 5, 2012
  40. CHEM

    Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help

    asked by Srah on March 16, 2012
  41. Chem

    f 147 grams of FeS2 is allowed to react with 88 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

    asked by Valarie on September 19, 2010
  42. Chem

    Complete the Bronsted lowry reactions HPO42-+H+ HPO42-+OH-

    asked by Sharon on February 21, 2014
  43. Chem

    Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper (ii) fluoride

    asked by Cindy on October 16, 2013
  44. chem

    In a solution prepared by mixing CH3OH with H2O the major species pesent are 1. a. CH3+, OH, and H2O 2. b. CH3O, H+, and H2O 3. c. CH3OH and H2O 4. d. CH3OH, H+, and OH I know i have to get an equation having trouble doing that!! please help!!

    asked by Mark on April 24, 2010
  45. Chem

    A flexible container at an initial volume of 5.12 L contains 7.51 mol of gas. More gas is then added to the container until it reaches a final volume of 18.3 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles

    asked by wendy on December 10, 2014
  46. chem

    A 2.241 g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide. 1)NiO Give the number of moles of each element to support you answer. moles of Ni 2) 1.339 mol moles of O 3)1.34 mol I know #1

    asked by hannah on November 12, 2010
  47. CHEM

    The electron from a hydrogen atom drops from an excited state into the ground state. When an electron drops into a lower-energy orbital, energy is released in the form of electromagnetic radiation. Part A: How much energy does the electron have initially

    asked by K on November 4, 2007
  48. Chem

    Write the formulas of the compounds formed by Pb4+ with the following anions: CN−, ClO3−, SO42−, H2PO4−.

    asked by Grace on March 4, 2016
  49. chem

    which of the following substances should have the highest melting point? Xe F2 SrS MgO CO2 the answers D, is it because its an ionic compound?

    asked by natash on May 11, 2008
  50. Chem

    A patient receives 3.2 L of glucose solution intravenously (IV). If 100. mL of the solution contains 5.0 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution? *If anyone could help me with this, please show

    asked by Lori on September 3, 2018
  51. Chem

    The solubility of argon in water at 25°C is 0.0150 mol/L. What is the Henry's Law constant for argon if the partial pressure of argon in air is 0.00934 atm?

    asked by Esra on December 30, 2017
  52. chem

    Arrange the following amines in order of decreasing base strength. NH3, NH2Br, CH3NH2, (CH3)2NH

    asked by help!!! on February 16, 2009
  53. Chem

    For the reaction, 3C2H2(g) ===> C6H6 at 25°C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K, Calculate the standard free energy change (in kJ) at 25°C. What is the formula that relates stand. entropy, enthalpy and

    asked by Ginger on March 30, 2008
  54. chem

    3.0 mol sample of KClO3 was decomposed according to the equation 2KClO3 = 2KCl + 3 O2 How many moles of O2 are formed assuming 100% yield? is it 3 moles? I don't want to work through the details of this problem completely. Tell me what you don't understand

    asked by jill on July 17, 2007
  55. Chem

    A patient receives 3.5 L of glucose solution intravenously (IV). If 100. mL of the solution contains 5.9 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution?

    asked by Asia Thomas on September 23, 2016
  56. CHEM

    A 5.10-g sample of iron is heated from 36.0oC to 75.0oC. The amount of energy required is 89.54 J. The specific heat capacity of this sample of iron is

    asked by jann on May 16, 2011
  57. chem

    Ka=1.8x10^-5. How do you calculate the value of pKa?

    asked by Vivian on November 9, 2010
  58. Chem

    Sort the following chromium compounds by whether the cation is chromium(II) or chromium(III). Cr2S3, Cr3P2, Crl3, CrO, CrBr2, CrN. How would I solve this? Soo stuck. Thanks! -MC

    asked by mysterychicken on February 26, 2014
  59. Chem

    I stuck on this problem. Can you help me to solve it? A reaction mixture in a 3.67L flask at a certain temp. initially contains 0.763g H2 and 96.9g I2. At equilibrium, the flask contains 90.4g HI. Calculate the equilibrium constant(Kc) for the reaction at

    asked by Kim on October 17, 2010
  60. Chem

    what kind of intermolec forces are in NH4Cl i thought it was london dispersion, dipole dipole, and hydrogen bonding and nottttt ionic. what am i doing wrong?

    asked by Brian on November 24, 2008
  61. Chem

    when 21.70 ml of 0.5000 m h2so4 is added to 21.70 mL of 1.000 M KOH in a coffee cup calorimeter at 23.50 degrees c, the temperature rises to 30.17 degree c. calculate delta H of this reaction (Assume that the total volume is the sum of the individual

    asked by Jake on October 7, 2014
  62. chem

    Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride in grams required to make 4.7 g of silver plating.

    asked by hannah on November 11, 2010
  63. CHEM

    What is the hybridization of the central atom in COH2?? Would the correct response, out of the following: a) sp b) sp^2 c) sp^3 d) sp^3d e) sp^3d^2 "e"-> sp^3d^2??

    asked by K on November 26, 2007
  64. Chem

    A 150-lb person burns about 2700 Calories to run a marathon. How much energy is burned in kJ?

    asked by Tiffie on August 31, 2015
  65. Chem

    Which chloride should exhibit the most covalent type of bond? WHY? A) NaCl B) KCl C) BaCl2 D) BeCl2 E) CaCl2

    asked by Sandy on April 12, 2009
  66. chem

    How many moles of carbon are needed to react with 525 g of hematite 2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to carbon

    asked by Julie on September 29, 2013
  67. chem

    How many moles of chloroethylene contain 5.47X10^26 molecules

    asked by mimi on October 1, 2011
  68. chem

    Does baking soda and vinegar have a complete ionic equation? HC2H3O2 (aq) + NaHCO3 ===> NaC2H3O2(aq) + H2CO3(aq)----->H2O(l)+CO2(g)+2H2O(l)

    asked by Lou on September 30, 2009
  69. chem

    What is the wavelength of light associated with the radiation of 7.26 x 10-19 J/photon? (h = 6.63 x 10-34 J • s)

    asked by trevor on November 18, 2008
  70. Chem

    Calculate the number of grams of Fe formed when 0.300kg of Fe2O3 reacts. Equation: Fe2O3+CO-->Fe+CO2 converted .300kg to 300g Balanced Fe2O3+3CO-->2Fe+3CO2 So I started by trying this: 300gFe2O3(1molFe2O3/159.687gFe2O3)...and then I don't know where I

    asked by Ezra on September 16, 2012
  71. chem

    When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constan

    asked by ana on October 17, 2011
  72. Chem

    Why is Avogadro’s number referred to as a mole? A The name "mole" is an 1897 translation of the German Mol, coined by Wilhelm Ostwald in 1893. The name is assumed to be derived from the German word Molekül (molecule). B There is no relationship between

    asked by Anonymous on June 15, 2020
  73. Chem

    Using this redox equation: Mn(OH)2(s) + MnO4-(aq) → MnO42-(aq) When the equation is balanced with smallest whole number coefficients, what is the coefficient for OH-(aq) and on which side is it present? ------I think its 4 and on the reactant side but i

    asked by Addam on May 7, 2017
  74. chem

    I am pretty confused on this. 1. Pick the appropriate solvent to dissolve A) Sodium Chloride (ionic) B) Sodium Nitrate (ionic) both have the choices of 1) water 2) acetone 3)ethanol 4)methanol 5)carbon tetrachloride 6)toluene 7)hexane

    asked by michelle on September 18, 2012
  75. chem

    What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization? Energy required to break pi bond is 4.42*10^-19. wavelenght=c/f but how do i figure out what f is?

    asked by tomi on November 12, 2008
  76. chem

    1. The total power used by humans worldwide is approximately 15 TW (terawatts). Sunlight striking the Earth provides 1.336 kW per square meter (assuming no clouds). The surface area of Earth is approximately 197,000,000 square miles. How much of Earth’s

    asked by tra on May 14, 2013
  77. CHEM

    is breaking an egg a chemical or physical change? is cooking an egg a chemical or physical change?

    asked by Elizabeth on October 17, 2010
  78. Chem

    a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml,

    asked by Lala on December 5, 2012
  79. Chem

    Which of the following is not a variable that can be manipulated in a gas law equation? Pressure Temperature Density Volume Temperature?

    asked by Anonymous on June 24, 2020
  80. Chem

    Which of the following is not an example of a neutralization reaction? A HCl + NaOH NaCl +H2O B 2 NaOH + H2CO3 Na2CO3 +2 H2O C H2SO4 + 2 NH4OH (NH4)2SO4 + 2 H2O D 2 AgNO3 + Zn 2Ag +Zn(NO3)2 A?

    asked by Anonymous on June 16, 2020
  81. Chem

    According to the Arrhenius Theory of acids and bases, a base is: A A substance that decrease the amount of hydroxide ions present. B A substance that increases the amount of hydroxide ions present when it is dissolved in water. C A substance that increase

    asked by Anonymous on June 16, 2020
  82. chem

    The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2 (g) → 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced?

    asked by jean on March 25, 2018
  83. Chem

    A 28.4 g sample of aluminum is heated to 39.4 C, then is placed in a calorimeter containing 50.0 g of water. Temperature of water increases from 21.00 C to 23.00 C. What is the specific heat of aluminum in cal/gC? Is the answer for this 0.3, using sig

    asked by Ish on September 21, 2014
  84. chem

    For the elementary reaction NO 3 + CO → NO2 + CO 2 the molecularity of the reaction is __________, and the rate law is rate = __________. A) 2, k[NO 2][CO 2] B) 2, k[NO 3][CO]/[NO2 ][CO 2] C) 4, k[NO 3][CO][NO 2][CO 2] D) 4, k[NO 2][CO 2]/[NO 3][CO] E)

    asked by JES on October 23, 2010
  85. Chem

    Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 15.0 g of Fe2O3. _MgO(s)+_Fe(s)->_Fe2O3(s)+_Mg(s) 1. a. 11.4 g 2. b. 3.78 g 3. c. 1.26 g 4. d. 0.0877 g I got equation balanced 3,2,1,3 just having

    asked by Mark on April 24, 2010
  86. chem

    Rank the following elements by electron affinity, from most positive to most negative EA value. Rank from most positive to most negative. To rank items as equivalent, overlap them. argon,sodium,iodine,oxygen,phosphorus

    asked by rabia on November 16, 2015
  87. chem

    6. What is wrong with the following electron configurations for atoms in their ground states? a) 1s^2 2s^2 3s^1 b) (Ne) 2s^2 2p^3 c) (Ne) 3s^2 3d^5

    asked by tra on May 14, 2013
  88. chem

    Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation:

    asked by Amanda on October 5, 2012
  89. chem

    How much energy, in joules, must be absorbed to convert to Na all the atoms present in 1.00mg of gaseous Na? The first ionization energy of Na is 495.8kj/mol .

    asked by tomi on October 26, 2008
  90. Chem

    What is the average mass of a single aluminum atom in grams? How do I solve this? I got 4.482 x 10^23. I divided 26.986/6.02x10^23

    asked by Anonymous on June 22, 2020
  91. Chem

    Hello, I had a question regarding the percent error formula. When I google the formula different formulas pop up either being [Experimental-Theoretical] / Theoretical * 100 or [Theoretical-Experimental] / Theoretical * 100. Which one is correct?

    asked by Anonymous on June 16, 2020
  92. Chem

    If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.700L , what will be the concentration of the final solution?

    asked by meaghan on September 30, 2013
  93. chem

    a considerable amount of heat is required for the decomposition of aluminum oxide. 2Al2O3-> 4Al(s)+ 3O2(g) change in heat= 3352KJ a. what is the heat change for the formation of 1 mol of aluminum oxide from its elements? i got this one. my answer is

    asked by Skye on January 25, 2012
  94. chem

    in the ground state electron configuration of Fe3+, how many unpaired electrons are present? I thought it was 1, but im getting a wrong answer.

    asked by natash on November 1, 2008
  95. Chem

    The numbers on the top of the coumns on the periodic table represent A The number of valence electrons that each of those elements in that column have. B The number of core electrons that each of those elements in that column have. C The number of orbital

    asked by Anonymous on June 22, 2020
  96. Chem

    Molar mass, sometimes referred to as molecular weight, is the mass of one mole of a substance, and is usually expressed in A Liters B Grams C Density D Moles D? The mole is derived from the quantity of atoms in 12 grams of carbon-12. The mole is just a

    asked by Anonymous on June 15, 2020
  97. chem

    How many moles of C6H12O6 are formed when 0.250 mole of CO2 is consumed in the reaction 6 CO2 + 6 H2O C6H12O6 + 6 O2?

    asked by joe on June 20, 2012
  98. Chem

    2NH3 NH4+ + NH2- In liquid ammonia the reaction represented above occurs. In the reaction, what does the NH4+ act as? A catalyst? And acid & a base? the conjugate acid of NH3? The reducing agent? The oxidizing agent?

    asked by Trevor on April 22, 2008
  99. Chem

    Why is Avogadro’s number referred to as a mole? A The name "mole" is an 1897 translation of the German Mol, coined by Wilhelm Ostwald in 1893. The name is assumed to be derived from the German word Molekül (molecule). B There is no relationship between

    asked by Anonymous on June 15, 2020
  100. Chem

    What is the balanced net ionic equation for copper(2)chloride and potassium carbonate ?

    asked by Nicole on September 8, 2015