1. chemistry

    What is the percentage composition of nitrogen in silver nitrate?

    asked by twynna on February 8, 2011
  2. Kimbe secodary

    Calculate percentage composition of nitrogen in amammonia

    asked by tyson on August 13, 2014
  3. Science

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? A. Nitrogen-Fixing Bacteria *** B. Denitrifying Bacteria C. Decomposers D. Producers 2. Which step in the nitrogen cycle is

    asked by PLZ... CHECK MY WOK~SCIENCE on February 12, 2015
  4. chemistry

    I need help with these questions 1. Calculate the percentage by mass of potassium in potassium sulfate K2 SO4 2. calculate the percentage by mass of nitrogen in ammonium nitrate Nh4 No3

    asked by Victoria on January 25, 2015
  5. ayo science help pls? my answers

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? A. nitrogen-fixing bacteria B. denitrifying bacteria C. decomposers D. producers 2. Which step in the nitrogen cycle is accelerated at

    asked by belle on November 13, 2014
  6. chemistry.

    Calculate the percentage by mass of nitrogen in PtCl2(NH3)2...can anyone help me.??

    asked by Denmark on October 3, 2009
  7. chemistry

    In the laboratory a student combines 25.9 mL of a 0.223 M magnesium bromide solution with 23.3 mL of a 0.615 M magnesium acetate solution. What is the final concentration of magnesium cation ? ..... M

    asked by ? on October 9, 2014
  8. Chemistry

    When ammonia was reacted to copper(ll)oxide at a high temperature, it will produce nitrogen gas, copper metal and water vapour. an experiment was done with 18.0g of ammonia was reacted with 90.0g of copper(ll)oxide. (a)Write balance chemical equations for

    asked by Reezyy on December 1, 2016
  9. physics

    There is a problem that asks if an ice cube is dropped into nitrogen (boiling point of nitrogen is 77K), how much nitrogen will evaporate? heat lost by ice = heat gained by nitrogen But by is the equation m(ice)*c(ice)*deltaT = m(nitrogen)*L(vaporation) ?

    asked by Pegs on April 21, 2011
  10. science

    magnesium oxide reacts with phosphoric, H3PO4 TO PRODUCE MAGNESIUM PHOSPHATE AND WATER. HOW MANY GRAMS OF MAGNESIUM OXIDE ARE REQUIRED TO REACT COMPLETELY WITH 33.5G OF PHOSPORIC ACID?

    asked by obuchi on November 1, 2014
  11. chemistry- proofread n help

    wrote the names for the following compounds Li3N i puit Lithium Nitride FeS i put ion Sulfide KCI i put Potassium Chloride CoSO4 i put Cobalt Sulfide SrBr2 i put Strotium bromide NCI3 i put Nitrogen trichloride Ga2O3 i put Galium Trioxide and H3PO3 i put

    asked by John on March 8, 2008
  12. chemistry

    nitrogen and hydrogen react to form ammonia. N2+3H2=2NH3. 12 dm3 of hydrogen reacted with excess nitrogen to form 2 dm3 of ammonia. what is the percentage yield of ammonia at room temperature and pressure

    asked by haya on November 15, 2016
  13. Science, The Nitrogen Cycle

    Multiple Choice: 1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other organisms can use? A. Nitrogen-Fixing Bacteria B. Denitrifying Bacteria C. Decomposers D. Producers 2. Which step in the nitrogen cycle is

    asked by Abby on October 12, 2014
  14. chemistry

    Magnesium combines with oxygen to form magnesium oxide. If 20.07 g of magnesium reacts completely with 6.70 g of oxygen, what is the percent by mass of oxygen in magnesium oxide?

    asked by Mg Good on October 7, 2014
  15. chemistry

    find the percentage by mass of nitrogen present in (NH4)2SO4

    asked by lucky on November 10, 2015
  16. Chemistry

    In the compound PtCl2(NH3)2, what is the percentage of the mass due to nitrogen?

    asked by Timber on November 2, 2009
  17. Help me with this science. 30 POINTS .

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at

    asked by josh on December 9, 2013
  18. Chemistry help

    I'm not sure how to answer this question.... Assume that magnesium would act atom-for-atom exactly the same as copper in this experiment. How many grams of magnesium would, have been used in the reaction if one gram of silver were produced? The atomic mass

    asked by Kelsey on February 16, 2010
  19. Science

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at

    asked by Monkey55 on November 17, 2014
  20. science

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at

    asked by TTR+S<3 on January 21, 2014
  21. Science

    1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) A.)nitrogen-fixing bacteria B.)denitrifying bacteria C.)decomposers D.)producers 2. Which step in the nitrogen cycle is

    asked by YRN DJ on November 18, 2015
  22. chemistry

    When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of

    asked by Anonymous on July 11, 2016
  23. chemistry

    When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of

    asked by Anonymous on July 11, 2016
  24. Help me with this science.

    Multiple Choice: 1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is

    asked by josh on December 10, 2013
  25. Chemistry - Stoichiometry

    16.2g of magnesium reacts exactly with 25.3g of fluorine to produce magnesium fluoride, the only product. How many grams of magnesium fluoride could be produced from the reaction of 10.5g of magnesium with excess fluorine. This is simple if you use

    asked by Kevin on August 25, 2005
  26. Chemistry

    Calculate the percentage of by mass of nitrogen in ammonium nitrate Nh4 No3

    asked by Victoria on January 21, 2015
  27. chemistry

    i have to write chemical formulas and balance them: nitrogen and oxyen---> nitrogen monoxide N2+02---->2NO nitrogen monoxide and oxygen----> nitrogen dioxide gas. NO2+O---->NO2 (i'm not sure about this, please check) nitrogen dioxide and water----> nitrous

    asked by Anonymous on January 13, 2008
  28. chemistry

    in the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If 4.59 mol of magnesium and 4.59 mol of hydrochloric acid are reacted, how many moles of magnesium chloride are produced ?

    asked by tyler on August 27, 2013
  29. chemistry

    In the formation of smog, nitrogen and oxygen gas react to form nitrogen dioxide: N2(g)+2O2(g)→2NO2(g)How many grams of NO2 will be produced when 2.1L of nitrogen at 840mmHg and 28∘C are completely reacted? I know that you use the equation n=PV/RT to

    asked by ellie on October 27, 2013
  30. Chemistry 11th Grade

    If a certain oxide of nitrogen weighing 0.11g gives 56 ml of nitrogen and another oxide of nitrogen weighing 0.15 g gives the same volume of nitrogen (both at STP), show that these results support the law of multiple proportions.

    asked by Akashdeep on May 3, 2010
  31. chemestry

    Based upon the previous question, what is the THEORETICAL YIELD (in grams) of Mg3N2 if you start with 10.0 grams of each reactant? previous question:consider the magnesium nitride addition reaction again. This time, suppose you start with 10.0 g of each

    asked by cristy on November 17, 2010
  32. Science

    Nitrogen, carbon, water and hydrogen make up more than what percentage of the mass of the human body?

    asked by Ruben on September 8, 2008
  33. chemistry

    The active ingredients of an antacid tablet contained only magnesium hydroxide and aluminium hydroxide. Complete neutralization of a sample of the active ingredients required 48.5 ML of 0.187 M hydrochloric acid. The chloride salts from this neutralization

    asked by Chansa on May 4, 2016
  34. Science

    Nitrogen in air is int he form of two nitrogen atoms fastened together, N2. Is Nitrogen an element or is it a compound?Explain. PLease help me! I need help really badly! please help !!! Fast!!

    asked by Mary on October 21, 2008
  35. Chemistry

    a solution contains an unkown amount of dissolved magnesium, addition odf 0.0877 mol of Na2CO3 causes complete precipitation of all the magnesium. what is the mass of magnesium was dissovled in the solution? you must write a balanced equation for the

    asked by Monika on April 29, 2011
  36. Science

    ____ bacteria carry out the conversion of gaseous nitrogen to a biologically useful form of nitrogen. My answer is "nitrogen-fixing" (This is fill in the blank)

    asked by Amy on March 15, 2014
  37. Science

    Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? A. denitrification B. nitrogen fixation C. producer uptake of nitrogen D. consumer decomposition

    asked by Amy on March 3, 2014
  38. Science

    Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? 1)denitrification 2)nitrogen fixation 3)producer uptake of nitrogen 4)consumer decomposition I think #3 Thank you.

    asked by Jamie M on March 12, 2018
  39. Chemistry

    A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. 1. What is the molarity of the magnesium sulfate solution? 2. What is the molarity of the magnesium ion? 3. What

    asked by J on September 12, 2013
  40. chm

    Liquid nitrogen is obtained by condensing gaseous nitrogen found in air and boils at 77.36 K. At the boiling point, the density of the liquid is 809 g/L and that of the gas 4.566 g/L. How many liters of liquid nitrogen are produced when 500.0 L of nitrogen

    asked by ami on February 2, 2011
  41. To DrBob222

    Can you please explain thoroughly to me about all this. Why do we criss cross the formulas of compounds? How do we find out which combining capacity to use if there are more than one? Is there a special formula we use to find out or something? I really do

    asked by Sara on April 22, 2010
  42. Science

    2. Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? (1 point) A) denitrification B) nitrogen fixation C) producer uptake of nitrogen*** D) consumer decomposition Am I correct?

    asked by Nicole M on March 1, 2014
  43. chemistry

    A solution contains an unknown amount of dissolved magnesium (Mg 2+). Addition of 5.50×10^−2 mol of Na2CO3 causes complete precipitation of all of the magnesium. what mass of the magnesium was dissolved in the solution? answer in unit g.

    asked by amanda on October 11, 2010
  44. chemistry

    Suppose you designed an experiment in which you burned a known quantity of magnesium in air. You used the product to determine how many moles of oxygen would react with the known number of moles of magnesium. Why would burning magnesium in air cause a

    asked by Morgan on January 25, 2015
  45. chemistry

    .46 gm of magnesium produces .7667 gm of magnesium oxide,.3 gm of magnesium liberates 280 ml of hydrogen at NTP from an acid and 1.26 gm of water is produce by combination of 1.12 gm of oxygen with hydrogen which law of chemical combination can be

    asked by salina on October 29, 2011
  46. AP Chemistry

    Suppose you designed an experiment in which you burned a known quantity of magnesium in air. You used the product to determine how many moles of oxygen would react with the known number of moles of magnesium. Why would burning magnesium in air cause a

    asked by Jessica AP Chemistry on July 5, 2016
  47. Chemistry

    A.) Write a balanced chemical Eq'n for a reaction between MAGNESIUM & HYDROCHLORIC ACID. Answer: Magnesium + Hydrochloric Acid Mg (s) + 2 HCL (ag) ---- MgCl2 (aq) H2(g) B.) Assuming 7.00 g of Magnesium completely react according to the above Eq'N,

    asked by Jen on December 19, 2016
  48. chemistry

    Another “grand challenge” for engineering is managing the nitrogen cycle. Use the nature of the chemical bond in diatomic nitrogen to explain why any management is needed for this biogeochemical cycle. With so much nitrogen available in the atmosphere,

    asked by Jazmin on February 4, 2011
  49. Science

    When magnesium oxide (MgO) and water (H20)react, they produce magnesium hydroxide Mg(OH)2. Magnesium hydroxide is a medicine used to treat an upset stomach. The equation for this chemical change is shown below: MgO + H20 --> Mg(OH)2 if 40.00 grams of

    asked by Bobby on December 12, 2014
  50. chemistry

    A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.

    asked by bob on September 30, 2014
  51. Chemistry

    A solution contains an unknown amount of dissolved magnesium. Addition of 3.38×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in this solution?

    asked by Courtney on October 3, 2013
  52. chemistry

    Determine if light with wavelength 3.00 x 10-7 m incident on gallium nitride (GaN) can generate electrons in the conduction band. Gallium nitride has a band gap of is 3.2 eV. Photons with wavelengths below what value will generate electrons in the

    asked by Dick on December 21, 2013
  53. Chemistry

    Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

    asked by Rayman on November 17, 2013
  54. Chemistry

    Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

    asked by Rayman on November 17, 2013
  55. chemistry

    magnesium reacts with sulphuric acid according to the equation: Mg3 + H2SO4=MgSO4 + H2 a 250cubic centimetre aqueous solution containing 9.8g of sulphuric acid is added to 6g magnesium a. show that the magnesium is present in excess Does it have something

    asked by Annonymous on August 31, 2018
  56. chem

    empty cruble-34.69g crucible+ magnesium- 34.86g crucible+magnesium oxide - 34.97g How can i find the number of moles of magnesium present at the start of the reaction How can i also find the total number of magnesium oxide molecules present at the end of

    asked by christine k on November 18, 2014
  57. Chemistry

    nitrogen reacts with oxygen to form 2 compounds. Compund A contains 2.8 g of nitrogen for each 1.6 g of oxygen. Compound B contains 5.6g of nitrogen for each 9.6g of oxygen. What is the lowest whole number mass ratio of nitrogen that combines with a given

    asked by Katelyn on December 18, 2009
  58. Chemistry

    nitrogen reacts with oxygen to form 2 compounds. Compund A contains 2.8 g of nitrogen for each 1.6 g of oxygen. Compound B contains 5.6g of nitrogen for each 9.6g of oxygen. What is the lowest whole number mass ratio of nitrogen that combines with a given

    asked by Katelyn on December 18, 2009
  59. Chemistry

    Magnesium can be used as a “getter” in evacuated enclosures to react with the last traces of oxygen. (the magnesium is usually heated by passing an electric current through a wire or ribbon of the metal) If an enclosures of 0.452L has a partial

    asked by Ricky on January 22, 2018
  60. chemistry

    Name each of the following ionic compounds or binary molecules. a. SF2---Sulfur difluoride b. MgF2---Magnesium fluoride c. SnCl2----Tin (II) Chloride d. PF5-----Phosphorus Pentafluoride e. NO2-----Nitrogen Dioxide f. SnO2-----Tin (II) Oxide

    asked by krystal on February 8, 2012
  61. chemistry

    A compound of nitrogen and oxygen is 36.8% nitrogen. A second compound of nitrogen and oxygen is 25.9% nitrogen. What is the ratio of masses of oxygen in the two compounds per gram of nitrogen?

    asked by Ciarra on September 30, 2011
  62. chemistry

    a 25.0g sample of magnesium at 22.0 degrees C absorbs 356.3 J of heat. The temperature of magnesium rises to 36.5 degrees C. What is the specific heat of the magnesium?

    asked by josh on November 1, 2010
  63. Chemistry

    You are going to be provided with 1 0.50 g sample of magnesium oxide. Treatment of this sample with hydrochloric acid (HCl) will take all of the MAGNESIUM in the oxide and change it into magnesium chloride, MgCl2 You will add 100 ml of 1.0 M HCl to the

    asked by JC on October 1, 2008
  64. Chemistry

    Ca+N-->Ca3N2 -What is limiting reagent? -Mass of calcium nitride formed when 50.0g of calcium reacts with 50.0g of Nitrogen? -Excess? CAN SOMEONE DOUBLE CHECK MY ANSWERS: Calcium is limiting reagent. Mass of Ca3N2: 68.4g Ca3N2 Excess: 38.4N left over.

    asked by Chris on November 17, 2017
  65. Chemistry

    Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form?

    asked by Anonymous on July 7, 2015
  66. chemistry

    Can someone give me some directions as to how to reach the answer for this problem: A 0.608g sample of fertilizer contained nitrogen as ammonium sulfate, (NH4)2 SO4(s)+2NaOH(aq)-->Na2SO4(aq)+ 2H2O(l)+2NH3(g) The ammonia was collected in 46.3 mL of 0.213 M

    asked by Chemically Confused on June 11, 2009
  67. Aqueous Stoichiometry

    Can someone give me some directions as to how to reach the answer for this problem: A 0.608g sample of fertilizer contained nitrogen as ammonium sulfate, (NH4)2 SO4(s)+2NaOH(aq)-->Na2SO4(aq)+ 2H2O(l)+2NH3(g) The ammonia was collected in 46.3 mL of 0.213 M

    asked by Chemically Confused on June 11, 2009
  68. Chem

    Which of these can be deduced according to this electrochemical cell? The image is at this address: cdstools(dot)flipswitch(dot)com/asset/media/678341 A. In the cell, zinc oxidizes magnesium and causes it to lose electrons. Magnesium must be less

    asked by Michael on June 13, 2018
  69. chemistry

    Compare the three types of bonds based on valence electrons. Explain why S-H bond lengths are longer than O-H bond lengths. Which element has a greater bond energy, oxygen or nitrogen and why. Determine if the following compounds are likely to have ionic

    asked by mido on December 13, 2010
  70. science (please please please help)

    3. Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this? ~mutualism***

    asked by mali on April 7, 2017
  71. chemistry

    A 26.3754 g sample of impure magnesium car- bonate 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

    asked by cheri on September 11, 2012
  72. chem

    When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 1.0 M HCl is required to react completely with 4.00 g of magnesium i did 4.00g x (mol/24.31 g Mg) x (2 mol HCl/1 mol Mg) x (L/!.0

    asked by Anon on March 27, 2009
  73. Chemistry

    Magnesium reacts with oxygen to form magnesium oxide according to the following equation: 2Mg(s) + O2(g) ==> 2MGO(s) If 0.81 grams of magnesium oxide are formed, how many grams of oxygen reacted?

    asked by Danny on May 6, 2010
  74. chemistry

    Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is

    asked by please help on April 25, 2012
  75. Chemistry

    Upon decomposition, one sample of Magnesium Fluoride produced 1.65 kg of magnesium and 2.57 kg of fluorine. A second sample produces 1.33 kg of magnesium. How much fluorine (in grams) did the second sample produce?

    asked by Bri on September 6, 2016
  76. 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

    asked by jake on September 18, 2011
  77. Chemisty

    For the following reaction, 0.390 moles of nitrogen gas are mixed with 0.139 moles of oxygen gas. nitrogen (g) + oxygen (g) nitrogen monoxide (g) What is the FORMULA for the limiting reagent? What is the maximum amount of nitrogen monoxide that can be

    asked by Eliazbeth on February 7, 2012
  78. 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?

    asked by Marrion on October 20, 2009
  79. chemistry

    Sulphuric acid (H2SO4) solution reacts with magnesium metal (Mg) to magnesium sulphate and hydrogen according to: H2SO4 + Mg → MgSO4 + H2 How many litres of 5.00 M sulphuric acid would be required to dissolve 20.00 g of magnesium and how many mol of

    asked by John on June 22, 2014
  80. chemistry

    What is the proper name for MgSO4/H2O? A. Manganese sulfate hexahydrate B. Magnesium sulfite dihydrate C. Magnesium sulfite heptahydrate D. Magnesium sulfate heptahydrate

    asked by Yui on August 24, 2014
  81. 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?

    asked by Anonymous on March 28, 2014
  82. Chemistry

    what happens when magnesium reacts with iodine to make magnesium iodide. Manymanymany thankyou's all round!!!!

    asked by moi encore une fois! on December 14, 2016
  83. Chemistry--bobpursley

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

    asked by mysterychicken on October 26, 2010
  84. chemistry

    how would the loss of magnesium oxide effect the ratio of magnesium to oxygen? and could you please show me the calculations ,, and thank you

    asked by wifaj on January 23, 2009
  85. Chemistry

    How many milliters of 0.500 M magnesium nitrate can be produced from the reaction of 35.5 grams of magnesium bromide.

    asked by Arlene on April 3, 2011
  86. chemistry

    Write the equation for the combination of magnesium and oxygen to form magnesium oxide, MgO.

    asked by Anonymous on October 11, 2013
  87. Chemistry

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

    asked by mysterychicken on October 26, 2010
  88. 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

    asked by Lauren on October 24, 2007
  89. chemistry

    if you start with 5.5grams of magnesium chloride,how many grams of magnesium flouride will be produced?

    asked by amber on February 25, 2010
  90. chemistry

    What mass of iodine would react with 48 grams of magnesium to make magnesium iodide?

    asked by juliana on October 8, 2016
  91. chemistry

    if not all the magnesium reacts, will the reported magnesium to oxigen ratio be too high or too low?

    asked by bailey on February 13, 2012
  92. Chemistry

    How many grams of magnesium oxide could be formed from the reaction of .248g of magnesium metal?

    asked by Dee on September 14, 2015
  93. 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

    asked by atriletz on January 28, 2007
  94. 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

    asked by toya on September 28, 2011
  95. grade 12 chemistry

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

    asked by Amy on May 6, 2010
  96. 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)]

    asked by Curry on October 30, 2012
  97. Science

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

    asked by Clinton on March 20, 2017
  98. math

    I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?"

    asked by Nina on September 18, 2008
  99. math

    I'm not sure of how to solve word problems. The question is,"One lawn fertilizer is 24% nitrogen and another is 12% nitrogen. How much of fertilizer should be mixed to obtain 100 kg of fertilizer that is 21% nitrogen?"

    asked by Nina on September 18, 2008
  100. 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.

    asked by elena on August 18, 2006