1. Chemistry

    Please check my workings to see if i'm correct, thanks! Find the percentage of nitrogen by mass in Ammonium nitrate, NH4NO3. (28/80)x 100% = 35% Is my answer correct?
  2. Chem

    Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute
  3. chemistry

    how does the number given just below the symbol for magnesium (rounded to 0.01) compare with average mass (amu) of one magnesium atom
  4. Science

    If 2.4g of magnesium burns in oxygen to produce 4.0g of magnesium oxide, Write a balanced equation for the reaction
  5. Chemistry--bobpursley

    37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride Is it Mg + C12 ---> MgC12 ? Thanks -MC
  6. chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.56kg of fluorine. A second sample produced 1.29kg of magnesium. How much fluorine (in grams) did the second sample produce?
  7. Chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
  8. Chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
  9. chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produce 1.38kg of magnesium. How much fluorine (in grams) did the second sample produce?
  10. Science

    Please help! Is Mgl2 Magnesium iodide or Magnesium Chloride, I am confused
  11. Chemistry

    An aqueous solution of ammonium nitrate NH4NO2 decomposeds when heated to give off nitrogen. This reaction may be used to prepare pure nitrogen. How many grams of ammonium nitrite must have reacted if 3.75dm^3 of nitrogen gas was collected over water at 26
  12. chemistry

    when magnesium and hydrochloric acid reacted, (rate of reaction), what would you have to do to express the average reaction rate in terms of mass of magnesium consumed per second and in terms of moles of magnesium reacted per second..thnks..
  13. Nitrogen Cycle

    KK I know that the Nitrogen cycle is the way that nitrogen in nature is changed into many different forms that are used by living organisms, but I have to explain how the phosphorus cycle differs from that cycle, and I don't know about that. Is it possible
  14. Chemistry

    excess magnesium is reacted with 45 grams of sulfuric acid. 9.5 liters of hydrogen gas are collected understand conditions of temperature and pressure. what is the percentage of hydrogen sulfate and of water in the acod solution?
  15. chemm

    A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NAN subscript 3 yielding 2NA + 3N subscript 2 the density of nitrogen gas is typically 1.16 g/L at room temperature. How
  16. metals

    Are you see the new work of magnesium metal? (magneisum,com) Magnesium is used in many light weight alloys. I am uncertain of your question. Please rephrase.
  17. grade 12 chemistry

    what amount of magnesium chloride will be produced when 250 ml of 8.0 mol/Hcl reacts with excess magnesium
  18. Chemistry

    37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride 40. How many torr equal 760 mm Hg? Please explain how to do these. Thanks -MC
  19. CHEMISTRY! NEED HELP FAST!

    if 250 ml of oxygen at stp are consumed when magnesium burns, how many grams of magnesium oxide? [Mg(s) + O2(g) ---> MgO(s)]
  20. chemistry

    I need to write a balanced equation and indicate the type of reaction phosphoric acid + magnesium hydroxide= magnesium phosphate+ water
  21. Chemistry

    If an ideal gas write the balances equation for the combination of magnesium and oxygen to form magnesium oxide, MgO.
  22. chemistry

    provide with enough heat, magnesium and oxygen can undergo a synthesis reaction. how much magnesium is neede if 3.5kg of product is desired?
  23. chemistry

    A 20.2g chunk of magnesium metal reacts with 13.7 g of oxygen gas to make magnesium oxide. Write the balance equation.
  24. Chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.50 kg of magnesium. How much fluorine (in grams) did the second sample produce?
  25. Chemistry

    one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.31kg of magnesium. How much fluorine (in grams) did the second sample produce?
  26. Chemistry

    The vapor pressure of nitrogen at several different temperatures is shown below. Temperature Pressure () 65 130.5 70 289.5 75 570.8 80 1028 85 1718 Use the data to determine the heat of vaporization of nitrogen. Determine the normal boiling point of
  27. chemistry

    I am unsure about balancing equation I would like for someone to let me know if I am working this out correctly? I have to write a balanced equation for the reaction when solid magnesium is added to a solution of lead(ii)nitrate, solid lead forms and the
  28. Chemistry

    How many liters of hydrogen gas can be made from 65.5g of magnesium at STP? Magnesium reacts to sulfric acid according to this equation... Mg+H2SO4-->MgSO4+H2
  29. Chemistry

    So I do know how to work out letter a) but I'm still very confused with parts b and c. Appreciate the help! 2FeN(s) + 3H2(g) --> 2Fe(s) + 2NH3(g) Suppose that the reaction is carried out at 300C and 3.00 atm. 1.00 grams of iron (III) nitride reacts.
  30. Chemistry

    When nitrogen dioxide is bubbled through a solution of potassium permanganate, the solution turns colorless. Which of the following statements is true? Question 3 options: 1) The test reveals that nitrogen dioxide is a colored gas. 2) The test reveals that
  31. chemistry

    Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? A. Magnesium has a 22 oxidation number and chlorine has 1+ oxidation number. B. Magnesium has 1+ oxidation number and chlorine has a 12 oxidation number. C.
  32. chemistry

    How do I write the skeleton equation representing the heating o f magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas?
  33. chem

    How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal according to the following reaction? i got .496 g but i know that like way off
  34. chemistry

    A sample of Nitrogen(N2)& Helium has a volume of 250mL @ 30degrees celsius & a total pressure of 745 mmHg a)If the pressure is 32mmHg what is the partial pressure of the Nitrogen? b) What is the volume of the Nitrogen at STP?
  35. Chemistry

    A 24 L welding tank contains of 285 bar of argon at 28 °C. Nitrogen is added to obtain an 80:20 argon:nitrogen mixture. a) What are the partial pressures of argon and nitrogen? b) What will be the total tank pressure?
  36. chemistry

    A sample of Nitrogen(N2)& Helium has a volume of 250mL @ 30degrees celsius & a total pressure of 745 mmHg a)If the pressure is 32mmHg what is the partial pressure of the Nitrogen? b) What is the volume of the Nitrogen at STP? Did not understand previous
  37. chemistry

    If 0.605 g of magnesium hydroxide reacts with 0.900g of sulfuric acid, what is the mass of magnesium sulfate produced? Mg(OH)2(s)+H2SO4(l)→MgSO4(s)+H2O(l)
  38. stoichiometry

    if 5.00g magnesium is combined with 10.0 g of chlorine, show by calculation which substance is the limiting reactant and calculate the theoretical yield of magnesium chloride for the reaction. Someone PLEASE HELP ME!!!!
  39. chem-repost

    How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal according to the following reaction? i got .496 g but i know that like way off
  40. Chemistry

    Given below is a reaction 2Mg+O2 = 2MgO Mass of magnesium oxide formed by buring 24g of magnesium in air is a.16g b.80g c.20g d.40g
  41. Chemistry

    How many moles of magnesium are in Magnesium Chloride?
  42. science

    how many atoms of magnesium are in the magnesium molecule?
  43. Chemistry

    In a combination reaction, 2.22 g of Magnesium is heated with 3.75 g of Nitrogen a) which reactant is present in excess? b) how many moles of product are formed? c) after reaction, how many grams of each reactant and product are present?
  44. chem

    A 1.5-L container of liquid nitrogen is kept in a closet measuring 1.2 m by 1.2 m by 1.8 m . Assume that the container is completely filled to the top with liquid nitrogen, that the temperature is 21.8 ∘C, and that the atmospheric pressure is 1.2 atm
  45. chemistry

    Analysis of a compound shows carbon hydrogen and nitrogen present. Each molecule contains one nitrogen atom. A 150. Mg sample of the compound produces 27.4 mg of NH3 in which all the nitrogen comes from the sample. Which of the following is the formula for
  46. Chemistry

    Magnesium nitrate reacts with lithium sulfate in a double replacement reaction. You have 3.45 g of lithium sulfate and 275 mL of magnesium nitrate. Calculate the molarity of the Magnesium nitrate solution in the reaction.
  47. Chemistry

    6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates
  48. Chemistry

    The burning of the magnesium becomes uncontrolled (it burn brightly. Oops! How will this procedural error affect the reported mole ratio of magnesium to oxygen in the analysis? Explain.
  49. Chemistry

    Under certain conditions, nitrogen gas reacts with oxygen gas to form nitrogen monoxide gas. How many total electrons are transferred for each molecule of nitrogen or oxygen?
  50. chemistry

    A 1.5-L container of liquid nitrogen is kept in a closet measuring 1.3 m by 1.3 m by 1.8 m. Assuming that the container is completely full, that the temperature is 22.3 C, and that the atmospheric pressure is 1.2 atm , calculate the percent (by volume) of
  51. Chemistry

    Rank the following fertilizers in decreasing order of mass percentage of nitrogen: NH3 NH4NO3 (NH4)2HPO4 KNO3 (NH4)H2PO4 (NH4)2SO4
  52. chem (science)

    Which of the following pairs of elements are likely to form ionic compounds: A) helium and oxygen B) magnesium and chlorine C) chlorine and bromine D) potassium and sulfur E) sodium and potassium F) nitrogen and oxygen I believe the answer is d and f Would
  53. Chemistry

    Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride. After dissolving this mixture in water, 0.500M of silver nitrate is added dropwise until precipitate formation is complete. The mass of the white precipitate formed is 0.641 g.
  54. Chem 105

    A 1.5-L container of liquid nitrogen is kept in a closet measuring 1.3 m by 1.3 m by 1.8 m. Assuming that the container is completely full, that the temperature is 22.3 C, and that the atmospheric pressure is 1.2 atm , calculate the percent (by volume) of
  55. science chemistry

    A basic amino acid,arginine,has a molar mass of 174g.mol^-1.it has the following percentage composition:41,38% carbon, 18,39% of oxygen,32,18% of nitrogen and 8,O5% of Hydrogen.determine the molecular formular of arginine
  56. chemistry

    After writing a balanced equation for the reaction between magnesium and hydrochloric acid, calculate the mass of magnesium needed to produce 90ml of hydrogen gas @ STP conditions.
  57. Chem

    Upon decomposition, one sample of magnesium fluoride produced 1.65 of magnesium and 2.57 of fluorine. A second sample produced 1.38 of magnesium. How much fluorine (in grams) did the second sample produce?
  58. Chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.64 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine (in grams) did the second sample produce?
  59. Chemistry

    A reaction of magnesium with nickel (iii) chloride will produce magnesium chloride and nickel. Using 31.76g of magnesium would produce how many grams of nickel?
  60. chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.65 kg{\rm kg} of magnesium and 2.58 kg{\rm kg} of fluorine. A second sample produced 1.50 kg{\rm kg} of magnesium. How much fluorine (in grams) did the second sample produce?
  61. Chemistry

    please HELP!! mass of magnesium chloride =.2 mass of chlorine in magnesium chloride =.1 A)moles of magnesium? B)moles of chlorine? C)moles of magnesium divided by the smaller number of moles? D)moles of chlorine divided by the smaller number of moles?
  62. chemistry

    In the reaction O2+2NO->2NO2 what is the ratio of oxygen reacted to nitrogen dioxide produced? Nitrogen monoxide to nitrogen dioxide? We had to calculate the concentration of each, for which I have O2=-1.01x10^-5, NO=-2.03x10^-5 and NO2=2.04x10^-5. I'm
  63. AP Chemistry

    A 23.9475 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of
  64. Chemistry

    According to the following reaction, how many grams of nitrogen gas will be formed upon the complete reaction of 22.2 grams of hydrogen gas with excess nitrogen monoxide? nitrogen monoxide (g) + hydrogen (g) nitrogen (g) + water (l)
  65. AP chemistry

    A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass
  66. chemistry

    A 21.8603 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass
  67. AP Chemistry i need help!

    A 21.5997 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass
  68. Chemistry

    A 28.4378 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass
  69. AP Chemistry

    A 28.4858 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s)→MgO(s) + CO2(g).After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of
  70. AP Chemistry

    A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass
  71. science

    these are my homework questions can you answer any???there are 4 1 A pupil placed some magnesium in a gas jar of oxygen How could the rate of reaction between these substances be increased 2 Complete the word equation for the reation magnesium and oxygen 3
  72. chem

    What is the actual amount of magnesium oxide produced when excess carbon dioxide reacts with 42.8 g of magnesium metal? The percent yield of MgO(s)for this reaction is 81.7%. 2Mg(s) . CO2(g) y 2MgO(s) . C(s)
  73. Chemistry

    Write the two chemical equations that describe the conversion of magnesium into magnesium oxide. 2Mg(s)+O2(g)->2MgO(s?) First off, would MgO be a solid or gas? And I have no idea what the 2nd equation could be.. Can anyone give me a hint?
  74. Chem

    Please tell me if these are right. How many grams are needed to obtain 1.5 moles of magnesium oxide? I got 60grams is this right? Write a balanced equation for the reaction of the magnesium and the oxygen including their physical states. I got 2Mg=Mg2+O2?
  75. Chemistry

    Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction:H3PO4 + Mg(OH)2 -----> Mg3(PO4)2 + H2O.Balance the equation, then enter the coefficients
  76. chemistry

    in an attempt to establish the formula of an oxide of nitrogen , a known volume of the pure gas was mixed with hydrogen and passed over a catalyst at a suitable temperature. 100% conversion of the oxide to ammonia and water was shown to have taken place.
  77. chemistry

    in an attempt to establish the formula of an oxide of nitrogen , a known volume of the pure gas was mixed with hydrogen and passed over a catalyst at a suitable temperature. 100% conversion of the oxide to ammonia and water was shown to have taken place.
  78. college

    18.0 grams of oxygen is reacted with nitrogen to make 56.0 grams of nitrogen dioxide according to the following reaction: 2O2 + N2 ---> 2 NO2 How much nitrogen (in grams) reacted?
  79. chemistry

    Magnesium reacts with HCl to produce magnesium chloride and hydrogen gas. Mg(s)+2HCl(aq)->MgCl2(aq)+H2(g). What is the molarity of the HCl solution if 330 ml of the HCl solution reacts with magnesium to produce 7.40 L of H2 gas measured at STP?
  80. chemistry

    nitrogen gas and oxygen gas combines to produce nitrogen dioxide. What amount of oxygen gas is needed to completely react with 3kg of nitrogen gas?
  81. chemistry

    The solubility of nitrogen gas in water at 25 °C and 1 atm is 6.8!10"4 mol/L. If the partial pressure of nitrogen gas in air above water is 0.76 atm, what is the concentration of dissolved nitrogen?
  82. chemistry

    Examine the scenario. A magnesium (Mg) atom gives one electron to two atoms of another element, and takes on a 2+ charge. The two atoms of the other element each form a 1− charge. As a result, the magnesium ion and the two ions of the other element
  83. chem

    Magnesium can react with aqueous nitric acid, HNO3, to form hydrogen gas and magnesium nitrate. Write down the balanced chemical equation for this reaction, remembering to use the state symbols.
  84. science

    Magnesium can react with aqueous nitric acid, HNO3, to form hydrogen gas and magnesium nitrate. Write down the balanced chemical equation for this reaction, remembering to use the state symbols.
  85. Chemistry

    Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 13.2 mL of a 3.00 M solution of hydrochloric acid and collect all of the hydrogen in a balloon at 25oC and 1.00
  86. Chemistry

    Help with any of these:    21. Aluminium sulphate is often used by gardeners to acidify soil and can be produced by the reaction 2Al(OH)3(aq) + 3 H2SO4(aq) à Al2(SO4)3(aq)  + 6 H2O(l) The volume of 0.275 mol/L H2SO4(aq) needed to react completely with
  87. chemistry

    5.50 grams of nitrogen triiodide are detonated in a closed 7.00 L flask that was under full vacuum initially. The nitrogen triiodide forms nitrogen gas and iodine gas upon detonation. What is the partial pressure of the iodine gas (in Pa) when the vessel
  88. Chemistry

    350 calories of heat is added to a sample of nitrogen gas, and the temperature is increased by 89 degrees celsius. what is the mass of the sample of nitrogen gas? For this we'll presume that you are either given, or can find the specific heat of Nitrogen
  89. Chemistry

    Draw a Bohr diagram of the protons and electrons in each of the following. a) an atom of magnesium Do I draw this with 19 atoms surrounding the shell of Magnesium around?
  90. Chemistry

    Suppose you tried to combine 42 grams of magnesium with 45 grams of oxygen. Which of the two substances would be left after the reaction? How much magnesium oxide will be formed?
  91. Chemistry

    What is the maximum amount of magnesium chloride you can produce when 15 g of magnesium (Mg) reacts with 20 g of hydrochloric acid (HCl)? Mg + HCl → MgCl2 + H2
  92. chemistry

    Suppose you tried to combine 42 grams of magnesium with 42 grams of oxygen. Which of the two substances would have some left after the reaction and how much magnesium oxide would be formed?
  93. 전자재료

    Uranium metal can be produced by the reaction of uranium tetrafluoride (UF4) with magnesium (Mg) in a sealed reactor heated to 700oC. The by-product is magnesium fluoride (MgF2). To ensure that all the magnesium is consumed in the reaction, the reactor is
  94. Chemistry

    When 24g of Magnesium reacts with oxygen gas the only product is magnesium oxide. If 40g magnesuim is produced how much oxygen was consumed?
  95. chemistry

    average atomic mass of magnesium is 24.31 amu. this magnesium is composed of 79 mole % of ^24 Mg and remaining 21mole % of ^25 Mg. calculate mole % of ^26Mg.
  96. chemistry

    Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 90 g sample of this alloy? Answer in units of mol
  97. Chemistry

    Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 32 g sample of this alloy? Answer in units of mol
  98. chemistry

    A sample of magnesium (13 g) when heated in air produces 22 g of product. What percent (by weight) of magnesium is present in the product? Answer in units of %.
  99. chemistry

    how would the loss of magnesium oxide smoke affect the empirical formula for magnesium oxide? show me the calculations please
  100. Chemistry 111

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