1. biology

    How does the pressure reading of water vapor differ from that of a gas like oxygen or nitrogen? is it because its fractional while oxygen and nitrogen is functional?

    asked by student on January 28, 2008
  2. chemistry

    Gallium nitride is a semiconductor with a bandgap 3.2eV . Calculate the absorption edge of GaN . Express your answer in units of m .

    asked by adex on April 1, 2013
  3. Chemistry

    Nitrogen and oxygen can react directly with one anotheer to produce nitrogen dioxide according to N2(g) + 2O2(g) --> 2NO2(g) The reaction may also be imagined to take place by first producing nitrogen oxide N2(g) + O2(g) --> 2NO(g) which then produces NO2

    asked by Sarah on November 13, 2015
  4. chemistry

    The mole fraction of an aqueous solution of magnesium chlorate is 0.371. Calculate the molarity (in mol/L) of the magnesium chlorate solution, if the density of the solution is 1.39 g mL-1.

    asked by colin on February 28, 2012
  5. physics

    Three cubic meters of liquid nitrogen has a mass about 2700 kg. When this much liquid nitrogen evaporates into gaseous air of density 1.25 kg/m3, what will its volume be? Show your work

    asked by Stuart on February 6, 2017
  6. Gen Chem

    Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the

    asked by Z on January 18, 2010
  7. 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
  8. Chemistry

    A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen gas is.........

    asked by Devanshu on June 3, 2010
  9. chemistry

    Consider a 675-mL container at 499 °C in which the pressure of nitrogen is 1.98x106 Pa. a) What mass of nitrogen (in g) is present in this container? b) How many molecules is this?

    asked by darali on May 17, 2010
  10. chemistry

    Nitrogen-13 has a half-life of 10 minutes. Given a starting mass of 2.00 g of nitrogen-13, how many grams will remain at the end of 30 minutes?

    asked by drew on June 19, 2012
  11. Chemistry

    How many molecules of nitrogen are in 22.4 L of nitrogen at exactly 0 C and 3 atm?

    asked by Angelique on February 21, 2014
  12. chemistry

    How many moles of nitrogen is 1.52 × 10 17 nitrogen atoms?

    asked by kr on February 5, 2012
  13. statistics

    3. Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw

    asked by Mike on July 19, 2012
  14. Statistics

    Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate

    asked by Josh on July 18, 2012
  15. Biology HELP!

    1. Which of the following correctly identifies the composition of an oxygen atom? (1 point) 8 protons, 8 electrons, and 8 neutrons 6 protons, 6 electrons, and 6 neutrons 8 protons, 6 electrons, and 7 neutrons 6 protons, 6 electrons, and 12 neutrons 2.

    asked by XenaGonzalez on August 13, 2015
  16. Chemistry

    If 26.4 grams of nitrogen and 30.1 grams of oxygen combine to form nitrogen monoxide, how many grams of nitrogen monoxide must form? I am confused on how to do the math.

    asked by Anonymous on January 22, 2017
  17. Chemistry

    Determine by calculation and diagrames to proof whether these two reactions are endothermic or exothermic .. 1. Methane burns in oxygen 2. Nitrogen (II) reacting with oxygen producing nitrogen monoxide.

    asked by Barachiel on July 25, 2016
  18. Chemistry 11th Grade

    Nitrogen form five compound with oxygen in which 1.0 g of nitrogen combines with 0.572,1.14,1.73,2.28 and 2.85g of oxygen respectively .show dis figure agree with law of multiple proportion.

    asked by Sachin on June 21, 2017
  19. san jac

    a sample of nitrogen gas contain 5.0mol in a volume of 3.5L calculate the new volume of the container if the pressure and temperature are kept constant but the number of moles of nitrogen is change to 2.5 mol

    asked by Anonymous on April 20, 2015
  20. chemistry

    a glass jar containing .27 mol of Nitrogen with a leaky lid is heated from room temperature 22 celcis to 150 celcis. How many moles of Nitrogen remain? How many gtams?

    asked by erin on October 12, 2012
  21. chemistry

    How many atoms of each element are in this compound? MgBr2 A. 2 magnesium atoms and 2 bromine atoms B. 2 magnesium atom and 2 bromine atoms C. 2 magnesium atoms and 1 bromine atom D. 1 magnesium atom and 2 bromine atoms

    asked by lalt on May 28, 2012
  22. Ion charge & formulas of ionic compunds-DrBob222

    These are the other questions: I'll start from Number 1. 1. I have to write down the symbol for the following ions: a- sodium = Na b- chloride = CL c- sulfate = S d- ammonium = ? would it be NH4? e- chromium (II) = Cr f- chromium(III) = Cr 2. write the

    asked by Sara on April 21, 2010
  23. Chemistry

    An antacid tablet containing magnesium hydroxide instead of calcium carbonate was dissolved in 100.0 mL of 0.2893 M HCL. 10 mL of this solutions was titrated to endpoint with 25.20 mL of 0.1007 M NaOH. How much magnesium hydroxide was in the antacid

    asked by Mindy on May 8, 2013
  24. Chrmistry

    Aqueous potassium phosphate was mixed with aqueous magnesium chloride, and a crystallized magnesium phosphate product was formed. Consider the other product and its phase, and then write the balanced molecular equation for this precipitation reaction

    asked by Beverly on June 18, 2015
  25. cheMYSTERY

    A 20.00 mL of 0.200mol/L magnesium chloride solution is added to a 95.00 mL of 0.800 silver (I) nitrate solution,Determine the concetration of the silver ions at the end of the reaction and the magnesium ions. and a precipitate is formed.

    asked by sandeep singh on April 23, 2014
  26. Chemistry

    For every liter of sea water that evaporates, 3.70g of magnesium hydroxide are produced. How many liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide? Please show and explain all steps! Thank you!

    asked by Jack on September 30, 2010
  27. Chemistry

    Given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? The GFM of the sample is 174.3amu. Now.. how do I go about finding the weight of the magnesium carbonate?

    asked by c on November 9, 2009
  28. chemistry

    When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:

    asked by Kay on March 3, 2014
  29. Chemistry

    According to his prelaboratory theoretical yield calculations, a student's experiment should have produced 1.44 g of magnesium oxide. When he weighed his product after reaction, only 1.23 g of magnesium oxide was present. what is the student's percent

    asked by Sia on February 17, 2009
  30. Chemistry+Balancing equations

    Aqueous magnesium hydroxide has been used for many uears because it reacts with HCL to produce magnesium chloride So far I got Mg(pos. 2 charge)OH2(-1 charge) + HCL >>>>>>> Mg(+2 charge)Cl2(-1 charge) + H2O did i get that rite?

    asked by Chopsticks on February 4, 2009
  31. Chemistry

    According to his prelaboratory theoretical yield calculations, a student's experiment should have produced 1.41 g of magnesium oxide. When he weighed his product after reaction, only 1.33 g of magnesium oxide was present. What is the student's percent

    asked by Teresa on December 6, 2014
  32. chemistry

    A 2.0 liter balloon at a temperature of 25°C contains 0.1 mol of oxygen and 0.4 mol of nitrogen. What is the partial pressure of nitrogen?

    asked by Anonymous on December 5, 2011
  33. Chemistry

    A sample of magnesium with a mass of 1.00 g is burned in oxygen to produce an oxide with a mass of 1.66 g. What is the empirical formula of the magnesium oxide produced? I know the answer is MgO. What are the steps to get that answer?

    asked by Doris on October 11, 2010
  34. math-calculus

    The following equation shows the approximate relationship between the percentage y of total personal consumption spent on food and the corresponding percentage x spent on education. y = 38/x^0.38 percentage points; (6.5 ≤ x ≤ 17.5). According to the

    asked by Trisha on December 21, 2012
  35. Chemistry!

    Nitrogen reacts with hydrogen to make ammonia: N2 + 3H2 -> 2NH3 Calculate the maximum thoeretical yield of ammonia that can be made by reacting 90g of hyrdrogen with an excess of nitrogen. Thanks!

    asked by Jessica on November 13, 2007
  36. Chemistry

    Ammonia may be oxidised to nitrogen monoxide in the presence of catalyst according to the equation 4 NH3 + 5 O2 gives 4 NO and 6 H2O. If 27 litres of reactants are consumed , what volume of nitrogen monoxide is produced at the same temperature and

    asked by b.s. chandrshekar on September 28, 2015
  37. science

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

    asked by Brianna on January 2, 2008
  38. Chemistry

    Ammonium nitrate (NH4NO3) is an important agricultural industrial chemical as it provides readily available nitrogen for plant growth, and one can buy 50. pounds of ammonium nitrate for $38. Urea (CO(NH2)2) is an attractive alternative, and, not being a

    asked by Val22 on March 15, 2015
  39. Chemistry

    1. Nitrogen monoxide is oxidized in air to give brown nitrogen dioxide. Starting with 2.2mol NO, how many moles and how many grams of 02 are required for complete reaction? What mass of NO2,in grams, is produced?

    asked by Mitto on September 10, 2013
  40. Algebra1

    Please check these for me. 11. Find: 32 out of 38 in percentage 84.2% 12. Find: 41 out of 51 in percentage 80.3% 13. Find: 69 out of 70 in percentage 98.5% 14. Find: 32 out of 110 in percentage 29% 15. Find: 41 out of 40 in percentage 102.5% Thank you

    asked by y912f on June 10, 2010
  41. Chemistry

    Hi! I'm having trouble solving this question, not sure how to go about starting it: Magnalium is a solid mixture of aluminum metal & magnesium metal. An irregular shaped chunk of a sample of magnalium is weighed twice, once in air (211.5g) and once in

    asked by Mila on February 27, 2016
  42. Chemistry

    How many moles of nitrogen are needed to produce 1.52 moles of nitrogen (ll) oxide ? N2 + O2 > FeCL3 + 3H20

    asked by jake on March 24, 2012
  43. chemistry

    A mixture contains 10.0 g each of the three gases nitrogen, oxygen, and argon. What is the mole fraction of nitrogen in the mixture?

    asked by Anonymous on November 6, 2013
  44. Chemistry

    The ¡°air¡± that fills the air-bags installed in automobiles is actually nitrogen gas produced by the decomposition of sodium azide, NaN3. Assuming that the decomposition of sodium azide produces both nitrogen and sodium metal (Na), what volume, in

    asked by Jim on November 2, 2012
  45. chemistry

    If the.mass of 100 cm of magnesium is 1.02g, what is the mass of the magnesium if its 1.5 cm?????????????? Help!!!!!

    asked by jerrica on April 8, 2012
  46. SMK Duma

    how to calculate ? when 21g of magnesium carbonate was heated , magnesium oxide produced . carbon dioxide also released. what is the volume of carbon dioxide released ?

    asked by Nurlisa on June 5, 2012
  47. Science

    Ammonia may be oxidised to nitrogen monoxide in the presence of a catalyst according to the following equation. 4NH3 +5O2-4NO+6H2O.If 27 litres of reactants are consumed ,what volume of nitrogen monoxide is produced at the same temperature and pressure?

    asked by Nisha on February 18, 2017
  48. Chemistry

    How many liters of nitrogen oxide at STP are produced from the reaction of 59.g of NH3? Balanced Equation: Ammonia reacts with oxygen to produce nitrogen oxide and water. 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

    asked by JR on July 28, 2014
  49. Chemistry

    50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the determination of the total cation concentration, 25.00 mL aliquots of the dilute OOH were passed through a cation exchange column and the eluent titrated with an average 27.42 mL of

    asked by Camice on January 25, 2012
  50. chemistry

    50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the determination of the total cation concentration, 25.00 mL aliquots of the dilute OOH were passed through a cation exchange column and the eluent titrated with an average 27.42 mL of

    asked by Annabelle on January 27, 2012
  51. Chemistry

    50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the determination of the total cation concentration, 25.00 mL aliquots of the dilute OOH were passed through a cation exchange column and the eluent titrated with an average 27.42 mL of

    asked by Georgia on January 26, 2012
  52. Economics

    What happens to the percentage of an income that is taxed when income rises and the tax is a proportional one? A. The percentage of tax falls. B. The percentage of tax rises. C. The percentage rises and then falls. D. The percentage of tax stays the same.

    asked by Anonymous on June 5, 2012
  53. statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b.

    asked by ann on August 20, 2011
  54. statistics

    Assume that a set of test scores is normally distrbuted with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first.... a. Percentage of scores less than 100. b.

    asked by Renee on May 8, 2010
  55. Statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b.

    asked by Ab on March 31, 2010
  56. auguta tech

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than

    asked by cynthia on April 18, 2010
  57. Statistics... I need help

    . Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: (Hint: Make a drawing and label first) a. Percentage of scores less than 100 b. Relative

    asked by Adam on April 19, 2010
  58. statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 b.

    asked by Ab on July 13, 2010
  59. Science

    I am doing an experiment at school to make magnesium chloride. We are using Bunsen Burners, HCl acid and I am using magnesium carbonate. Would the only control variables in the experiment be the volume of acid, the acid type and the base type? Pls help

    asked by Stoof on January 21, 2016
  60. Chemistry

    Upon decomposition, one sample of magnesium fluoride produced 1.55 kg of Magnesium and 2.42 kg of fluoride. A second sample produced 1.10kg of magnesium. How much fluoride (in grams) did the second sample produced?

    asked by Sara on February 5, 2015
  61. Chemistry

    NH4NO3 (aq) + (heat) --> 2 H20 (l) + N2 (g) Calculate the mass in grams of ammonium nitrate that must be used to produce 1.50 L of nitrogen gas collected over water at 30°C and 748 torr. At 30°C, PH20 = 31.8 mmHg. Find the moles of nitrogen gas.

    asked by Anonymous on October 25, 2011
  62. Chemistry

    A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.977 g/L at 680. torr and 84.1°C. What is the molecular formula of the compound?

    asked by EM on November 3, 2010
  63. physics urgent help !

    if a 3e charge is at the origin and a magnesium nucleus is 3 cm from the originin the x-axis direction.what is the magnitude of the net electrostatic force a Boron nucleus would experience at the point half way between magnesium nucleus and 3e charge on

    asked by james on November 11, 2013
  64. chemistry

    I am enrolled in analytical chemistry after a 4 year break from any chemistry. I was recently given a problem set and I need some help on the following: A 0.899g sample containing epsom salt, MgSO4 & 7 H2O, and other non-hydrated materials was dehydrated

    asked by Kenneth on January 30, 2008
  65. ap chemistry

    write a balanced equation if 18.0g go nitrogen gas reacts with excess oxygen gas at STP to form nitrogen dioxide gas

    asked by michelle e on May 2, 2017
  66. Chem

    Solid magnesium metal reacts with chlorine gas according to the following equation: Mg + Cl2 --> MgCl2 What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2 use the masses to two decimal places on the chart in the

    asked by Mary on October 19, 2013
  67. Chemistry , please !

    when 21g of magnesium carbonate was heated , magnesium oxide produced . carbon dioxide also released. what is the volume of carbon dioxide released ?

    asked by Ikram on June 5, 2012
  68. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe on March 23, 2011
  69. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe on March 23, 2011
  70. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe on March 23, 2011
  71. Calculus help!

    (1) A toy truck travels at a rate of 0.5t ft/sec after t seconds of travel (so after 6 seconds the truck is traveling 3 ft/sec). a) Graph the speed of the truck vs. time for 0

    asked by anonymous on January 21, 2008
  72. caluclus homework help

    (1) A toy truck travels at a rate of 0.5t ft/sec after t seconds of travel (so after 6 seconds the truck is traveling 3 ft/sec). a) Graph the speed of the truck vs. time for 0

    asked by Leslie on January 20, 2008
  73. 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

    asked by Amanda on July 6, 2010
  74. Algebra

    I do not understand this homework at all. Any help or elaboration would be greatly appreciated. Thanks. 100 juniors at Southwest High took the SAT test. The scores were distributed normally with a mean of 22 and a standard deviation of 3. Label the mean

    asked by Kesha on April 12, 2016
  75. Chemistry

    a) If you have 5 dinitrogen monoxide molecules, how many nitrogen atoms do you have? b) If I had 5 moles of dinitrogen monoxide molecules, how many individual nitrogen atoms would I have? I think the answer for A is 6 nitrogen atoms. but I have no idea on

    asked by Mae on March 22, 2016
  76. Chemistry

    nitrogen gas is at 2.00. c, 2.00 atm pressure and occupies a volume of 10.01. Assume nitrogen is an ideal gas, how many moles of the gas are present?

    asked by Tomi on November 4, 2012
  77. Chemistry

    Write a balanced chemical equation for nitrogen gas reacts with oxygen gas to produce nitrogen dioxide gas

    asked by Elizabeth on March 30, 2010
  78. statistics

    Using the 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores less than 100 b. relative frequency of

    asked by Christine on May 11, 2010
  79. Chemistry

    I've run into some difficulty with my chemistry homework. We went over this practise question in class today as an example. However, I wasn't able to fully grasp how to work it out. "How many grams of nitrogen form when 34.6 grams of nitrogen dioxide

    asked by Kara on March 29, 2016
  80. School of Christ International, physics

    A value of 22.0m of nitrogen gas at 20°c is heated under constant pressure to 167°c What is the new nitrogen gas

    asked by MOSES on July 13, 2015
  81. Chemistry

    How many liters of excess reactant would be left when 3.00 liters of nitrogen monoxide is mixed with 2.00 liters of oxygen and allowed to react at 695 torr and 27 degrees Celsius to produce nitrogen dioxide

    asked by Andy on July 27, 2011
  82. AP Chemistry HELP!!!

    This is part of a marathon problem, we have to identify the five compunds of H, N, and O. As well as write a Lewis structure that is consistent with the info. PLease help I don not even understand the ? a. All the compunds are electrolytes, although not

    asked by Sam on December 2, 2006
  83. Computer Science/Excel

    Here's the problem: John believes that the average American will be in debt forever. He decides to create a table that demonstrates this. He thinks that given 60 months (5 years) to get out of debt and the annual percentage rates 1-5 and 7-15 the

    asked by Denise on November 1, 2007
  84. Chemistry

    Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and

    asked by Clare on April 22, 2014
  85. statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b.Relative frequency of scores less than 120

    asked by TAW on November 21, 2010
  86. Math-statistics

    Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantiles: a.percentage of scores less than 100 b. relative frequency of scores less than 120 c.

    asked by Jane Brown on March 1, 2013
  87. Chemistry

    Copper metal reacts with dilute nitric acid in the absence of air. Which products are present? 1. copper (II) nitrate, nitrogen monoxide, and hydrogen gas 2. copper (I) nitrate, water and hydrogen gas 3. copper (II) nitrate, nitrogen monoxide and water 4.

    asked by Anonymous on January 30, 2010
  88. chemistry

    If 20.0 grams of hydrogen and 40.0 grams of nitrigen are combined to form nitrogen trihidride, how many grams of nitrogen trihydride should be formed?

    asked by stoi. on March 13, 2012
  89. physics

    Calculate the mass of nitrogen present in a volume of 3000 cm^3 if the temperature of the gas is 22 degrees Celsius and the absolute pressure is 2.00 * 10^-13 atm, a partial vacuum easily obtained in laboratories. The molar mass of nitrogen (N2) is 28

    asked by Jen on November 16, 2007
  90. Chemistry

    I have to sort compounds into groups, separating them by if they are acidic, Ionic, or Covalent. Heres the list: Calcium Carbonate Sodium Hypochlorite Sodium Chloride Sodium Hydrogen Carbonate Acetic Acid Ammonium Hydroxide Silicon dioxide Magnesium

    asked by Kaylee on December 11, 2012
  91. Chemistry

    Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was used in each trial and that HCl is in excess) Magnesium/HCl reaction: Grams of Mg= 0.244g Initial temp= 32.2 degrees celsius

    asked by Liz on July 21, 2014
  92. chemistry

    Which material would you expect to have a greater bandgap energy between indium nitride and indium phosphide ?

    asked by adex on April 1, 2013
  93. Chemistry

    How many L of N2 gas are produced at STP when an airbag inflates if the airbag contains 132g of sodium nitride?

    asked by Kathy on May 17, 2011
  94. Qualitative analysis ( Chemistry)

    A solution x forms a white precipitate with dilute sulfur in acid and also with aqueous silver nitrate. What could solution x contain? A) Barium Chloride B) Barium nitrate C) Magnesium chloride D) Magnesium chlorine Could someone tell me how to get the

    asked by Cheezel on November 18, 2016
  95. chemistry

    Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L

    asked by Lisa on December 30, 2014
  96. Chemistry

    Magnesium has three naturally occurring isotopes: 24 Mg (23.985 amu) with 78.99% abundance, 25 Mg (24.986 amu) with 10.00% abundance, and a third with 11.01% abundance. Look up the atomic mass of magnesium, and then calculate the mass of the third isotope.

    asked by Anonymous on November 17, 2010
  97. Chemistry

    When 1.5 grams of magnesium burns, how many grams of magnesium oxide will be formed? a) Write a balanced chemical equation for the above reaction. b) Show by unit conversion (show conversion factors, ie. 2 g H20 x 1 mole H2O/18 g H2O x ...... x ...... =

    asked by Ashley on June 15, 2012
  98. Chemistry

    Suppose you have 5.00g of powdered magnesium metal, 1.00L of 2.00M potassium nitrate solution, and 1.00L of a 2.00M silver nitrate solution. a) Which one of the solutions will react with the magnesium powder? I don't understand how to go about answering

    asked by Feufolia on February 22, 2016
  99. Chemistry

    Ammonia is produced when Nitrogen gas reacts with Hydrogen gas, as shown by the equation below: N2 + 3H2 --> 2NH3 If the percentage yield is 90%, what would be your experimental yield of NH3 if 145.8g of N2 react? 2) 2Mg + O2 --> 2MgO A) If 50g of Mg

    asked by Mark on May 21, 2014
  100. Chemistry

    Ammonia is produced when Nitrogen gas reacts with Hydrogen gas, as shown by the equation below: N2 + 3H2 --> 2NH3 If the percentage yield is 90%, what would be your experimental yield of NH3 if 145.8g of N2 react? 2) 2Mg + O2 --> 2MgO A) If 50g of Mg

    asked by Mark on May 21, 2014