1. Chemistry

    When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyaninde (HCN) is given off. Here is the equation: KCN(aq) + HCl(aq) ----> KCl(aq)+ HCN(g) If a sample of 0.140 g of KCN is treated with an excess of HCl, calculate the amount

    asked by Ysay on July 5, 2011
  2. General Chemistry

    3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an excess of HCl, calculate the

    asked by Kendra on May 24, 2010
  3. General Chemistry

    When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCI(aq) -> KCI(aq) + HCN (g) In a sample of 0.140 grams of KCN is treated with an excess of HCI calculate the

    asked by Kendra on May 26, 2010
  4. chemistry

    Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how much HCN, in grams, is

    asked by Kara on October 3, 2011
  5. Chemistry

    When potassium cyanide reacts with acids a deadly poisonous gas hydrogen cyanide is produced calculate the mass in grams of hydrochloric acid molar mass 36.46 grams per mole needed to completely react with 0.140 grams of potassium cyanide molar mass 65.12

    asked by Meg on November 12, 2019
  6. chemistry

    Assume that you have 2.75 g of the deadly gas hydrogen cyanide,HCN. What is the volume of the gas at STP?

    asked by Christy on November 7, 2011
  7. Chemistry

    Below are 2 word equations. For each, identify the type of equation and write a chemical equation with symbols for the word equation. (I have solved the equations but I am not sure what the question means by ``type of equation``) a) Potassium was

    asked by Anonymous on September 8, 2015
  8. Chem

    Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. Cyanogen = C2N2 (CN)2 Hydrogen Cyanide = HCN boils at 26C and yeilds an acid solution when added with water. Sodium Cyanide = empirical formula NaCN is a solid melts at 564C a) Assuming

    asked by Lacey on March 6, 2007
  9. Chem

    Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. Cyanogen = C2N2 (CN)2 Hydrogen Cyanide = HCN boils at 26C and yeilds an acid solution when added with water. Sodium Cyanide = empirical formula NaCN is a solid melts at 564C a) Assuming

    asked by Lacey on March 6, 2007
  10. chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2

    asked by caroline on October 29, 2010
  11. Chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2

    asked by Emily on October 31, 2010
  12. Chemistry

    Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted? 2K(s) + 2 H2O (l) -> 2 KOH (aq) + H2(g)

    asked by BR on May 11, 2015
  13. chemistry

    Assume that you have 2.10 of the deadly gas hydrogen cyanide, . What is the volume of the gas at STP?

    asked by Jennifer on November 2, 2011
  14. chemistry

    write a net ionic equation for the following: 1)Iron (III) chloride reacts with Potassium hydroxide to produce Iron (III) oxide, Potassium chloride, and Hydrogen gas. 2)Hydrochloric acid reacts with Potassium carbonate to produce Potassium chloride,

    asked by rachel on October 26, 2010
  15. Chem- REALLY URGENT!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  16. Please help me!!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  17. Chem Help please!!!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  18. Chemistry ASAP

    3. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Moe on January 18, 2013
  19. Adv AP Honors Chemistry

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  20. chemistry

    Hydrogen cyanide, HCN, can be made by a two-step process. First, ammonia is reacted with O2 to give nitric oxide, NO. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) Then nitric oxide is reacted with methane, CH4. 2 NO(g) + 2 CH4(g) → 2 HCN(g) + 2 H2O(g) +

    asked by caroline on September 26, 2010
  21. CHEMISTRY

    Hydrogen cyanide, HCN, can be made by a two-step process. First, ammonia is reacted with O2 to give nitric oxide, NO. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) Then nitric oxide is reacted with methane, CH4. 2 NO(g) + 2 CH4(g) → 2 HCN(g) + 2 H2O(g) +

    asked by DAWN on September 27, 2009
  22. chemistry

    Hydrogen cyanide, HCN, can be made by a two-step process. First, ammonia is reacted with O2 to give nitric oxide, NO. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) Then nitric oxide is reacted with methane, CH4. 2 NO(g) + 2 CH4(g) → 2 HCN(g) + 2 H2O(g) +

    asked by caroline on September 25, 2010
  23. Chemistry

    If the concentration of KCN at the equivalence point is 0.1M and the Ka for HCN is 6.2*10^-10 find the pH at the equivalence point. The reaction is between KOH and HCN From my understanding I have to do a stoichiometric calculation and then use the

    asked by Maddy on September 28, 2016
  24. Chemistry

    What are the equilibrium concentrations of all the solute species in a 0.95 M solution of hydrogen cyanide, HCN? The Ka value = 6.2 x 10^-10. (a) [H3O+], M; (b) [OH-], M; (c) [HCN], M; (d) What is the pH of the solution? For HCN So far i have calculated

    asked by Alice on August 14, 2016
  25. Chemistry 20

    Hydrogen cyanide gas is produced industrially by the reaction 2 CH4(g) + 3 O2(g) + 2 NH3(g) → 2 HCN(g) + 6 H2O(g) What volume of O2(g) is needed to completely react 17 L of CH4(g) at STP?

    asked by Michelle on May 11, 2015
  26. Chemistry

    Calculate the mass (in mg) of KCN needed to make 500. mL of aqueous KCN solution with a pH of 10.00. The Ka of HCN = 5.0 x 10-10. I got the answer 7.8 mg but it's wrong. Can someone please explain how to do it?

    asked by Nat on July 9, 2013
  27. chemistry

    are the noble gases of NCCN cyanogen = Argon HCN hydrogen cyanide = Neon thanks I don't know how to answer this. There are 10 electrons, all bonding electrons in HCN. In the case of F, for example, we say its ion is isoelectronic with Ne; i.e., there are

    asked by bex on February 18, 2007
  28. Science

    potassium metal reacts with water to give potassium hydroxide and hydrogen gas How to balance this equation with proper steps?

    asked by Rohan on April 8, 2016
  29. chemistry

    potassium-a metal that catches fire whet it reacts with water, chlorine-a green poisonous gas bromine-a reddish brown liquid lithium-the least reactive of the alkali metals neon-an nonreactive gas iron-a metal with very high melting point

    asked by chelsea on October 13, 2010
  30. Chem

    Draw a Structural Formulae for Hydrogen Cyanide (HCN) and Cyanogen (C2N2 or CN2) Hydrogen = 1 Valency Nitrogen = 3 Valencies Carbon = 4 Valencies H-C(triple bond)N N(triple bond)C-C(triple bond)N Thank you And for a Lewis Structure they would be H:C:::N:

    asked by Anthony on March 12, 2007
  31. Chemistry

    Name the chemical formula for each: a. Sodium hydrogen carbonate NaHCO3 b. Calcium Hypochlorite Ca(ClO)2 c. Hydrogen cyanide HCN d. Magnesium hydroxide MgOH2 3. Tin(II) fluoride SnF2 Are all of these right?

    asked by Anonymous on September 16, 2009
  32. Gen Chem

    What are the net ionic equations for: 1. Potassium Fluoride and Ammonium Chloride and 2. Sodium Hydrogen Sulfite and Potassium Cyanide?

    asked by Ann on March 28, 2011
  33. chemistry

    I have to draw Lewis structures for hydrogen cyanide and cyanogen with nitrogen valency of three. Would I still need 2 dots after the N in hydrogen cyanide or would this represent nitrogen with a valency of 5? Yes. THose two "dots" are unshared electrons.

    asked by Hol on March 9, 2007
  34. chemistry

    I need help in drawing a structual formula for hydrogen cyanide(HCN)and cyanogen(CN)2, the drawing has to bear in mind the valencies of hydrogen(1),nitrogen(3) and carbon (4), any help appreciated H:C:::N: :N:::C:C:::N: Check my thinking. The previous one,

    asked by ruby on February 6, 2007
  35. Science

    6.0g of aluminum metal reacts with excess dilute hydrochloric acids what volume of hydrogen gas at r.t.p?

    asked by Bwalya on April 26, 2019
  36. chemistry

    state noble gas whose electron configuration is attained in a lewis structure for hydrogen cyanide and noble gas attained in lewis structure for cyanogen? I have answered this several times but at times it really wasn't an answer. I am not familiar with

    asked by Pedro on March 7, 2007
  37. Chemistry

    What is product form when 2-bromobutane reacts with potassium cyanide in ethanol?

    asked by Aboi on December 15, 2014
  38. 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 1, 2009
  39. Chemistry Balancing Equations

    I really need help with balancing these equations: PLEASE HELP!! 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride 2. Sodium nitrate reacts with hydrochloric acid to produce nitrogen monoxide

    asked by Anonymous on March 14, 2011
  40. Chemistry

    Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming," in which methane gas, CH4, from natural gas reacts with water vapor to

    asked by Jimmy on November 15, 2016
  41. Chemistry--help!

    Given the equilibrium: HCN(aq) + H2O(l) ←→ H3O+(aq) + CN-(aq) ΔH >0; Ka = 4.0 x10-10 What happens to the concentration of hydrogen cyanide [HCN] when the following stresses are placed on the system at equilibrium? NaCl is added ---> Stays the Same but

    asked by Val on March 9, 2010
  42. physics

    is this the strutual formula for hydrogen cyanide H:C:::N and is this correct for cyanogen :N:::C:C:::N any advice woulds be appreciated This is more chemistry than physics. It is important to put the subject line carefully in order for the right people to

    asked by bex on February 18, 2007
  43. Chemistry

    Count the electrons. HCN I see 10. NCCN I see 18. What noble gas has an atomic number of 10? of 18? State the noble gas whose electron configuration is attained in the following Lewis structures. a) H:C:::N: (cyanide) b) :N:::C:C:::N: (cyanogen)

    asked by DrBob222 on February 6, 2007
  44. Chemistry

    Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming," in which methane gas, CH4, from natural gas reacts with water vapor to

    asked by Jimmy on November 15, 2016
  45. acids and alkalis

    can you tell me me some acids and alkalis that are used in the house acids. vinegar(acetic acid), lemon juice (citric acid), cream of tartar (potassium hydrogen tartrate), vanish (sodium hydrogen sulfate--but I think the newer product has changed the

    asked by abigal on January 18, 2007
  46. science

    Hydrogen Cyanide (boiling temperature 26 degrees Celsius) is an important chemical for the production of nylon and various transparent plastics. It is produced on an industrial scale by the oxidation of methane in the presence of ammonia. The equation

    asked by katie on April 21, 2007
  47. Chemistry

    Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming," in which methane gas, CH4, from natural gas reacts with water vapor to

    asked by Jimmy on November 15, 2016
  48. chemistry

    Acids that form ionic solutions will conduct electricity. Acids that form covalent solutions will not conduct electricity. but acids have HYDROGEN in them and hydrogen is a gas is that why the results of the conduction test need to be changed because

    asked by lila on November 1, 2008
  49. chemistry

    I would like my equation checked, sodium cyanide and water.I have worked the balanced equation as: NaCN+H20=NaOH+HCN. If you want the molecular equation this looks good to me. Actually, it's the CN^- that is hydrolyzed (reacts with water) and the ionic

    asked by ruby on February 8, 2007
  50. Chemistry

    how do you write a chemical equation with this reaction? can u help me solve these 1.Liquid carbon disulfide reacts with oxygen gas, producing carbon dioxide gas and sulfur dioxdie gas. 2. Solid zinc and aqueous hydrogen sulfate reacts to produce hydrogen

    asked by Lauren on January 26, 2009
  51. chemistry

    Consider the formation of cyanogen c2n2 and its subsequent decomposition in water given by the equations 2Cu2+ + 6CN- 2[Cu(CN)2]- + C2N2 C2N2 + H2O HCN + HOCN How much hydrocyanic acid HCN can be produced from 35.00 g of KCN, assuming 100% yield?

    asked by Arik on October 19, 2012
  52. Chemistry 171 Lab

    Suppose we collect hydrogen gas, H2(g), over water at 21◦C in a vessel with total pressure of 743 Torr. If the hydrogen gas is produced by the reaction of aluminum with hydrochloric acid: 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g) what volume of hydrogen

    asked by Rae on June 15, 2016
  53. AP Chemistry

    2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g) When 0.400 mole of potassium reacts with excess water at STP, what is the volume of hydrogen gas produced? the answer is 4.48 liters but I keep getting wrong numbers! please help! Thanks!

    asked by Andrew on October 2, 2008
  54. chemistry

    use the properties of sodium cyanide described above to deduce the type of bonding that holds this compound together, explaining in 1 or 2 short sentences how you arrived at your conclusions. Write a balanced chemical equation for the reaction that occurs

    asked by Pedro on March 7, 2007
  55. 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
  56. 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
  57. Science

    What are the Lewis structures for hydrogen cyanide and cyanogen?? I think it's H:C:::N :N:::C:C:::N: with the inner upper electrons being shared. For the elements in these compounds, which is the noble gas whose electron configuration is attained in the

    asked by Helen on March 11, 2007
  58. chemistry

    The reaction between potassium metal and chlorine gas is described by the following thermochemical equation K(s) + ½C_l2(g) = KCl(s) ÄH =–437 kJ mol–1 What will be the enthalpy change (to 2 significant figures) for the reaction when 6.0 g of

    asked by trigger on December 30, 2008
  59. 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
  60. Science (chemistry)

    Write a balanced chemical equation and state the reaction type for each of the following reactions: a.) nitrogen gas reacts with hydrogen gas forming ammonia (NH3) b.) carbonic acid breaks down to form carbon dioxide gas and water c.) aluminum foil reacts

    asked by Anonymous on April 2, 2014
  61. CHEMISTRY

    Hydrogen cyanide is used in the production of cyanimid fertilisers. It is produced by the following reaction: 2CH4 + 2NH3 + 3O2  2HCN + 6H2O (a) How much hydrogen cyanide can be produced starting with 100 kg of each of the reactants? (b) Which is the

    asked by alex on February 27, 2013
  62. Chemistry Balancing Equations

    Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with hydrochloric acid to produce

    asked by Anonymous on March 14, 2011
  63. Chemistry

    For many years the recovery of gold-that is, the seperation of gold from other materials-involved the use of potassium cyanide: 4AU + 8KCN + 02 +2H20 -> 4KAu(CN)2 + 4KOH What is the minimum amount of KCN in moles needed to extract 29.0 g (about an ounce)

    asked by Kate on August 2, 2010
  64. Chemistry

    Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming", in which methane gas, CH4, from natural gas reacts with water vapor to

    asked by Lily on November 16, 2016
  65. Chemistry

    1) Is chalk a mixture or a compound? 2)We say that reactive metals react with acids to give salt + hydrogen gas.Is it necessary to write "dilute acids"?

    asked by janice on April 10, 2009
  66. Chemistry

    0.250 g KCN is dissolved in 50 mL of water, and added to 2 mL of NaOH then mixed with 48mL of water. What is the molar concentration of KCN? I am stuck on this question. So far I have: 0.250gKCN/0.050L= 5M(g/L) Moles of KCN: 5M = mol/0.05L = 0.25mol KCN I

    asked by Zach on September 28, 2016
  67. chemistry

    i need to deduce the type of bonding that holds sodium cyanide together and write a balanced equation for sodium cyanide dissolving in water any help would be appreciated sarah Na^+ + :C:::N:^- Na to CN bond is ionic (more or less). C-N bond is covalent.

    asked by sarah on March 1, 2007
  68. Chem

    Mg reacts with 150 mL of 6.00M Hcl through single replacement to produce hydrogen gas. How many liters of hydrogen gas are produced? (tell me how you got it please)

    asked by druva on May 5, 2009
  69. chemistry

    In a sealed vessel xenon tetrafluoride, XeF4, reacts with hydrogen gas to give xenon gas and hydrogen fluoride gas. What is a balanced chemical equation, including state symbols, for this reaction. thankyou.

    asked by trigger on January 3, 2009
  70. science

    When the metal sample reacts with acid, the gas evolved will be collected over water; the gas is said to be "wet". What is the composition of the wet gas? How can the partial pressure of hydrogen be obtained from the total pressure of wet gas? From where

    asked by anonymous on April 5, 2015
  71. Chemistry

    Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added?

    asked by Mary on March 26, 2017
  72. Chemistry

    Convert the following into a balanced equation: Liquid disilicon hexachloride reacts with water to form solid silicon dioxide, hydrogen chloride gas, and hydrogen gas.

    asked by Anonymous on October 29, 2009
  73. Chemistry

    A mixture of nitrogen gas and hydrogen gas reacts in a closed container to form ammonia gas. The reaction ceases before either reactant is completely consumed. At this stage the container has 3.0 mol each of all three gases; nitrogen, hydrogen and ammonia.

    asked by megs on June 30, 2013
  74. Chemistry

    Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200 oC in a closed container, 1.1 atm of nitrogen gas is mixed with 2.1 atm of hydrogen gas in an otherwise empty container. At equilibrium, the total pressure is 2.2 atm. Calculate

    asked by Jake on May 3, 2012
  75. Chemistry

    Please check to see if I got these right and specifically for #2, I am not sure if I have this balanced correctly. Write the complete balanced equations for the following: 1) Potassium metal reacts with oxygen gas to form solid potassium oxide. My answer:

    asked by Ashley on August 4, 2010
  76. Chemistry 101

    Iron reacts with hydrochloric acid to produce iron (2) chloride and hydrogen gas.Fe (s)+ 2 HCL (aq) -FeCl2 (aq) + H2 (g).The hydrogen gas from the reaction 2.2g of iron with excess acid is collected in a 10L flask at 25 degrees celcius. What is the

    asked by Eunice on April 30, 2009
  77. Chemistry

    A mixture of nitrogen gas and hydrogen gas reacts in a closed container to form ammonia gas. The reaction ceases before either reactant is completely consumed. At this stage the container has 3.0 mol each of all three gases; nitrogen, hydrogen and ammonia.

    asked by Blair on June 29, 2013
  78. Chemistry

    I need some help to draw a Lewis structure for hydrogen cyanide + what is the noble gas?

    asked by Dave B on December 18, 2009
  79. Chemistry

    I have drawn Lewis structures for hydrogen cyanide and cyanogen. I need to state the noble gas (for each element) whose electron configuration is attained in the Lewis structures. Can anyone help as I am quite confused! Many thanks Previous posts have

    asked by Bean on March 4, 2007
  80. Chemistry

    when potassium in water are combined they produced 4000.0 kJ of heat along with potassium hydroxide and hydrogen gas. how much energy would be produced if you dumped a 1.00 kg chunk of potassium into a swimming pool? s this reaction what is the enthalpy

    asked by Al on October 19, 2015
  81. Chemistry

    Which of the following aqueous solutions are good buffer systems ? . 0.26 M hydrochloric acid + 0.24 M potassium chloride . 0.14 M acetic acid + 0.20 M potassium acetate . 0.16 M potassium hypochlorite + 0.23 M hypochlorous acid . 0.31 M hydrocyanic acid +

    asked by Chris on February 26, 2011
  82. Chemistry

    Having real trouble trying to write a balanced equationfor Hydrogen Cyanide. Every time I get most of it right I unbalance everything else orelse land up with huge numbers. Any hints gratefully received would you care to give the equation? CH4 + NH3 +O2 --

    asked by Hatty on May 3, 2007
  83. chemistry

    nitrogen gas reacts with hydrogen gas to form ammonia. The nitrogen gas is in a closed 500.0 mL flask at 751 mm HG connected to a 1.25 L flask containing the hydrogen gas at 1.21 atm pressure. Both flasks are kept at 37C. if the stopcock is opened and the

    asked by anonymous on April 10, 2013
  84. Chemistry

    1. The atmosphere of earth is an example of what kind of solution? A. liquid-liquid B. gas-liquid C. gas-gas*** D. solid liquid 2. Which of the following will result in a greater amount of oxygen dissolving in water? A. Heat the water*** B. Decrease the

    asked by Hartley on April 17, 2017
  85. chemistry

    Potassium nitrate is made by adding potassium chloride to hydrogen nitrate in the presence of oxygen gas. Along with the potassium nitrate, chlorine and water are produced. How would write the equation?

    asked by mark on February 26, 2012
  86. chemistry

    hydrogen gas reacts with oxygen gas to produce water if a student fills a 250-mL flask with hydrogen at STP, what volume of oxygen is necessary for the reaction?

    asked by yaziie on November 20, 2014
  87. Chemistry

    For the following chemical reaction... HCN (aq) + KOH (aq)----> H2O (l) + KCN (aq) write the net ionic equation, including the phases

    asked by Chelsea on October 4, 2013
  88. Chemistry

    For the following chemical reaction HCN(aq)+KOH(aq)--->H2O(l)+KCN(aq) Write the net ionic equation, including the phases.

    asked by Ann on April 3, 2016
  89. chemistry

    A 0.052g sample of aluminium reacts with excess 6M HCL. A 48.3mL volume of hydrogen gas was collected over water at 22C and the pressure of the hydrogen gas was 751mmHg.calculate the aluminum percent purity in the sample. What volume of hydrogen gas at STP

    asked by jeffrisa on October 30, 2014
  90. Chemistry

    Hydrogen gas, , reacts with nitrogen gas, , to form ammonia gas, , according to the equation 3H2+N2-2NH3 How many grams of can be produced from 2.90 of ?

    asked by Rose on October 5, 2009
  91. Chemistry

    For the following acids: i. CH3COOH ii. HNO2 iii. HCN a) What is the dissociation equation in an aqueous solution? b)Give the KA expression for each of the acids. c)Identify the acid-base pairs.

    asked by Andrea on May 13, 2012
  92. Science

    zinc is mixed with Hydrochloric acid to form zinc chloride and hydrogen gas. if 7.3 grams of zinc completely reacts how much hydrogen gas will be created? if you collect the hydrogen over water at 23 degrees celcius and a barometric pressure of 770 mmHg

    asked by Tylor on April 16, 2014
  93. chemistry

    Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

    asked by Rafael Alvarez on December 11, 2009
  94. Chemistry

    4.0 L of hydrogen gas reacts with 2.0 L of nitrogen gas (at the same temperature and pressure), producing ammonia gas, NH3. Find the limiting reactant.

    asked by Andres on October 25, 2011
  95. Chemistry

    1. What amount of Potassium Chloride forms when 5.25 litres of Chloride gas at 0.95 atm and 293K reacts with 17.0g of Potassium.

    asked by Kam on August 3, 2011
  96. chem

    a) why should you use moles in stoichimetric problems? b) solid reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of soodium are added to water? 2Na + 2H2P ------>

    asked by john on April 20, 2008
  97. CHEMISTRY

    a) why should you use moles in stoichimetric problems? b) solid reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of soodium are added to water? 2Na + 2H2P ------>

    asked by john on April 20, 2008
  98. chemistry

    Raoul Pictet, the Swiss physicist who first liquefied oxygen, attempted to liquefy hydrogen. He heated potassium formate, KCHO2, with KOH in a closed 2.50 L vessel. KCHO2(s) + KOH(s) → K2CO3(s) + H2(g) If 50.1 g of potassium formate reacts in a 2.50-L

    asked by caroline on October 24, 2010
  99. Chemistry

    Calculate the volume of amonia gas is produced at STP when 140g of nitrogen gas reacts with 30g of hydrogen gas (Atomic mass N=14u,H=1u)

    asked by Anonymous on September 8, 2017
  100. Chemistry2

    12.) Chlorine reacts with potassium bromide to produce potassium chloride and bromine. a.) write a chemical equation, using words, to represent the above chemical reaction. Answer: Chlorine + potassium bromide ==> potassium chloride + bromine (Is this

    asked by Sam on September 9, 2015