1. Chemistry

    How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

    asked by momo on April 15, 2012
  2. MINERALS

    can someone pls explain (n i mean explain) the effect of nitrate ion and magnesium ion deficiency on plant growth proteins....well they are used for repairing worn out cells and for producing new cells? chlorophyll....it'll be able to photosynthesise less

    asked by Mike on July 5, 2005
  3. Science chemestry

    calculate the average rate of a reaction. He placed 10.00 g piece of aluminium into 6.0 M HCl. After 20 s. he found that 4.50 g of unreacted magnesium remained. Calculate the average rate at which magnesium was consumed by the acid. #not I really do not

    asked by Sisanda mkhwanazi on April 11, 2016
  4. chemistry

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

    asked by techman on November 23, 2012
  5. chemistry

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

    asked by Chemq on March 20, 2013
  6. Science

    Alice and Marge are studying the properties of matter. The girls cut some silver-colored magnesium sheets into 3-inch long strips and then put one strip each into test tubes: one containing water and one containing acid. Nothing happened when they added

    asked by SAM on September 12, 2017
  7. auguta tech

    a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0.0235+0.015+0.84 c. Percentage of scores less than 140 d. Percentage of scores less than 80 e. Relative frequency of scores less than 60 f.

    asked by cynthia on April 18, 2010
  8. Chemistry

    Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4 (g) ---> 2NO2 (g) Delta H rxn: 55.3 kJ At 298 K a reaction vessel initially containing .100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. -What percentage of N2O4

    asked by Tyler on July 18, 2011
  9. Chemistry

    Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4(g)→2NO2(g)ΔHorxn=55.3kJ At 298 K, a reaction vessel initially contains 0.100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. What percentage of N2O4 decomposes at

    asked by Justiss on April 21, 2017
  10. biology

    A man with normal color vision marries a woman who is colorblind. What percentage of their sons would be colorblind, what percentage of their daughters would be colorblind, what percentage of their daughters would be carriers of the colorblind gene?

    asked by Andrew on March 31, 2011
  11. statics

    Using the 68-95-99.7 rule: 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…Drawings need not

    asked by Anonymous on May 4, 2010
  12. ap chemistry

    Ammonia decompose upon intense heating to produce nitrogen and hydrogen elemental products. Write a balanced equation and then use stoichiometry problem solving to determin the mass of nitrogen product that can form if exactly 25.50g of ammonia is fully

    asked by anonymous on August 10, 2016
  13. chemistry

    Ammonia decomposes upon heating to produce nitrogen and hydrogen elemental products. Write a balanced equation and then use stoichiometry problem solving to determin the mass of nitrogen product that can form if exactly 25.50 grams of ammonia(NH3) is fully

    asked by anonymous on August 10, 2016
  14. question

    Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? nitrogen-fixing bacteria denitrifying bacteria decomposers producers***

    asked by anonymous on March 13, 2014
  15. Science: my answers

    Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? nitrogen-fixing bacteria denitrifying bacteria decomposers producers***

    asked by anonymous on March 13, 2014
  16. chemistry 30

    Catalytic converters in automobiles are used a. only to burn uncombusted gasoline b. only to convert carbon monoxide to carbon dioxide c. only to convert nitrogen oxides to nitrogen and oxygen d. all of the above

    asked by Tucker on December 30, 2011
  17. Chemistry

    25cm^3 of a gas containing only nitrogen and oxygen decomposed to form 25cm^3 of nitrogen and 50cm^3 of oxygen. All the volumes were measured at the same temperature and pressure. Write an equation for the reaction.

    asked by Cindy on October 14, 2013
  18. chemistry

    The mole fraction of oxygen in air is 0.209. Assuming nitrogen is the only other constituent, what are the partial pressures (in torr) of oxygen and nitrogen when the barometer reads 780 torr?

    asked by alex on March 20, 2013
  19. 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 nitrogen sample in cal/gram Celsius?

    asked by justmarla on August 30, 2012
  20. chem101

    Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.

    asked by richard on March 24, 2011
  21. chemistry

    2) 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?

    asked by Anonymous on March 17, 2013
  22. chemistry

    if I have the reaction Magnesium + Hydrochloric Acid -> Magnesium Chloride + Hydrogen Gas And I have to 'investigate the effect of the concentration of the acid on the volume of hydrogen gas produced in the above reaction', what would be expected to

    asked by beth on April 7, 2014
  23. Chemistry

    Part 1 : a.) How many grams of Hydrogen will be contained in a 100.000 g sample of magnesium hydroxide.? c.) How many grams of nitrogen will be contained in a 120.0 g sample of calcium cyanide? ________________________________________ Part 3: d.) How many

    asked by Amber Deana B. on January 12, 2016
  24. chemistry

    Magnesium can be produced by reaction of magnesium oxide (MgO) with silicon (Si). The by-product of the reaction is magnesium orthosilicate (Mg2SiO4). A reactor is charged with 183.0 kg of MgO and 116.0 kg Si. Assume the reaction goes to completion.

    asked by schoolgirl on March 23, 2013
  25. statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Martin on August 14, 2015
  26. Statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Kendra on November 22, 2014
  27. Statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Samantha on August 1, 2015
  28. Science

    Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? nitrogen-fixing bacteria denitrifying bacteria decomposers producers Would the correct answer be A?

    asked by anonymous on March 15, 2014
  29. Chemistry

    A sample of nitrogen gas is collected over water at a temperature of 23 degrees C. What is the pressure of the nitrogen gas if the atmospheric pressure is 795 mm HG? Anser in units of mm Hg.

    asked by Lisa on October 14, 2015
  30. College Chemistry 3

    Find the empirical Formula of a compound that is 30.4% nitrogen by mass, and consists of only nitrogen and oxygen. What is its molecular formula if its molar mass is 92g/mol?

    asked by Ernesto on August 15, 2012
  31. statistics/Help Please!!

    In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained:0.18, 0.12, 0.05, 0.19, 0.18,0.13, 0.15. Assuming that this sample is representative of the cars in use, construct a 98%

    asked by slomomo on March 4, 2015
  32. chemistry

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

    asked by selly on November 19, 2012
  33. chemistry

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

    asked by selly on November 19, 2012
  34. statistics

    Using the 68-95-99.7 rule: 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

    asked by Trish on July 25, 2010
  35. statistics

    Using the 68-95-99.7 rule: 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

    asked by sweet on August 16, 2010
  36. stats

    Using the 68-95-99.7 rule: 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

    asked by Jenn on September 21, 2010
  37. Chemistry

    An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? b. What is the mas in milligrams of 0.0457 mole of magnesium hydroxide?

    asked by Glenn on July 1, 2013
  38. physics

    if 3e charge is at the origin and magnesium nucleus is 3 cm from the origin in the x-direction. what is the magnitude of the net force a boron nucleus would experience half way between magnesium nucleus and 3 e charge

    asked by james on November 11, 2013
  39. Chemistry

    An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? b. What is the mas in milligrams of 0.0457 mole of magnesium hydroxide?

    asked by Glenn on July 1, 2013
  40. Science

    In Kjeldhal's method, Conc. H2SO4,NaOH & Boric acid is used to measure the % of nitrogen in a sample. If , in a sample HgCl2 is added , will it interfere the reaction? Accurate conc. of nitrogen will be determined or not?

    asked by Jyoti on May 5, 2016
  41. biology (check answer)

    What is different about every nucleotide of a DNA molecule? a) the deoxyribose sugar b) the phosphate group c) the shape of the molecule d) the nitrogen bases it's the nitrogen bases, am i correct?

    asked by quickquestion on March 6, 2017
  42. Chemistry

    A sample of nitrogen gas is collected over water at a temperature of 23°C. What is the pressure of the nitrogen gas if the atmospheric pressure is 791 mm Hg? Answer in units of mm Hg

    asked by Peter on January 30, 2013
  43. math

    SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen? a. 14.4% b. 18% c. 38% d. 40% e. 62% please answer and explain

    asked by thomas on May 4, 2014
  44. Math

    In an interbarangay basketball league the team from barangay Culiat has won 12 out of 25 games a winning percentage of 48% .We have seen that they need to win 8 games consecutively to raise their percentage to at least 60%. What will be their winning

    asked by Queen on July 18, 2016
  45. math

    In an interbarangay basketball league the team from barangay Culiat has won 12 out of 25 games a winning percentage of 48% .We have seen that they need to win 8 games consecutively to raise their percentage to at least 60%. What will be their winning

    asked by Queen on July 18, 2016
  46. Organic Chemistry

    During the synthesis of a Grignard reagent in diethyl ether solvent, what is the identity of the bubbles that show up on the surface of the magnesium? -Gaseous magnesium byproducts -Gaseous O2 -Gaseous H2 -Gaseous diethyl ether

    asked by Ash on September 26, 2015
  47. Chemistry

    During the synthesis of a Grignard reagent in diethyl ether solvent, what is the identity of the bubbles that show up on the surface of the magnesium? -Gaseous magnesium byproducts -Gaseous O2 -Gaseous H2 -Gaseous diethyl ether

    asked by Ash on September 26, 2015
  48. Chemistry

    Pharmacists sell tablets containing magnesium hydroxide, Mg(OH)2, to combat indigestion. A student carried out an investigation to find the percentage by mass of Mg(OH)2 in an indigestion tablet. The student reacted the tablet with dilute hydrochloric

    asked by Youtube on January 1, 2013
  49. General Chem

    Nitrogen oxide reacts with oxygen gas to form nitrogen dioxide (NO2). In one experiment 0.866 mole of NO is mixed with 0.503 mole of O2. Calculate the number of moles of NO2 produced

    asked by Alexis on October 12, 2012
  50. Physics

    A gas cylinder has a volume on 200l, and contains Nitrogen at a pressure of 200kPa and a temperature of 290 degrees Kelvin. The molar mass of Nitrogen is 14.0067g. Calculate. The number of moles in the gas cylinder?

    asked by John on December 4, 2015
  51. Chem

    Volume of nitrogen gas is 125ml atmospheric pressure is 763mm Hg the water temperature inside the eudiometer is the same as the level of the water in the beaker. Calculate the volume if the nitrogen at STP. P1V1/T1=P2V2/T2

    asked by Steve on April 9, 2015
  52. Chemistry

    When 34.5 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present? 4NH3+5O2->4NO+6H2O

    asked by Niki on October 13, 2008
  53. Algebra

    Joyce combines 9 atoms of hydrogen and 3 atoms of nitrogen to make 3 molecules of ammonia. write a direct variation equation which relates atoms of hydrogen to atoms of nitrogen. How many nitrogen atoms does Joyce need to form ammonia molecules using 51

    asked by Andrea on November 28, 2012
  54. Naming Ionic Compounds

    Can you please have a look at my questions. Thank you very much in return:-) 1. Will 2 metals develop an ionic compound? Clarify. I don't think they will, but I don't know how to explain. I only know that in order to form ionic compounds, the total number

    asked by Sara on April 22, 2010
  55. Chemistry

    How many (a) calcium ions and how many (b) nitride ions are there in 1.00 mol Ca3N2?

    asked by Arya on April 14, 2016
  56. chemistry

    A molecule of sodium nitride would control how many sodium ions? Why?

    asked by Robert23 on October 27, 2014
  57. Marketing Math - markup/mark down

    A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down 25% and sold.

    asked by anonymous on May 6, 2013
  58. Math

    A clothing retailer purchased a line of fall leather coats which were priced to sell at $600 each. This price reflected a markup of 45% on the selling price. At the end of the season the retailer had three coats left, which were marked down to 25% and

    asked by Anonymous on December 12, 2013
  59. Chemistry

    The solubility of nitrogen in water is 6.9 x 10^-4 at exactly 1 atm pressure. What is the solubility of nitrogen under .80 atmp pressure? I don't know where to start with this problem, what formula do I use?

    asked by Sara on February 13, 2013
  60. Chemistry

    A sample of nitrogen is collected over water at 21 degrees Celsius at a pressure of 745 torr. What is the partial pressure, in torr, of the nitrogen?

    asked by Failure on November 10, 2015
  61. Chemistry

    1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is

    asked by Melanie on March 19, 2015
  62. Chemistry

    An antacid contains 200mg of aluminum hydroxide and 200 mg of magnesium hydroxide per capsule. How many moles of aluminum hydroxide does each capsule contain? What is the mass in milligrams of 0.0734 mole of magnesium hydroxide?

    asked by Lily on November 16, 2016
  63. Chemistry PLZ HELP!!!!!

    though both nitrogen and oxygen are diatomic gases, nitrogen is far less reactive than oxygen. Why?

    asked by Maci on April 9, 2012
  64. chemistry

    Which of the following statements is true regarding the Lewis structure for methylamine, CH3NH2? a) There will be an unshared pair of electrons on the nitrogen atom. b) There will be three covalent bonds to the carbon. c) Nitrogen will form a double bond

    asked by Sawyer on September 9, 2010
  65. chemistry

    What is the formula equation and balance it and also give the sum coefficient of: 1.sulfur dioxide(g)+oxygen(g)delta arrow (sorry i can't draw it here) sulfur trioxide 2. nitrogen dioxide(g)+dihydrogen monoxygen(l)- nitric acid(g)+nitrogen monoxide

    asked by bertshie on October 9, 2012
  66. chemistry

    How many particles are there in a mole of nitrogen dioxide molecules? How many total atoms are there in a mole of nitrogen dioxide molecules?How many nitrogen atoms? How many oxygen atoms?

    asked by yo on April 3, 2015
  67. Chemistry

    energy required for ionisation of 0.02 gram atom of magnesium is x Kj .the amount of energy required to ionise 1 atom of magnesium is

    asked by sam on June 5, 2015
  68. Chemistry

    A sample of nitrogen gas was collected via water displacement. Since the nitrogen was collected via water displacement, the sample is saturated with water vapor. If the total pressure of the mixture at 21 °C is 1.16 atm, what is the partial pressure of

    asked by Leanna on December 9, 2015
  69. Chemistry

    A sample of nitrogen gas was collected via water displacement. Since the nitrogen was collected via water displacement, the sample is saturated with water vapor. If the total pressure of the mixture at 21 °C is 1.16 atm, what is the partial pressure of

    asked by Leanna on December 9, 2015
  70. SCIENCE/MATH

    Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a)Calculate how long it will take to

    asked by SAMY on November 6, 2009
  71. Math

    Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a) Calculate how long it will take to

    asked by rina math help on November 10, 2009
  72. 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? Please show the solution step by step.

    asked by Mitto on September 10, 2013
  73. Chemistry

    What is the empirical of compound (X) going through the following decomposition reaction? X = sulfur + oxygen + nitrogen sulfur = 21 gr oxygen = 69.70gr nitrogen = 6.10gr

    asked by ELIJAH B on February 2, 2012
  74. biology

    escribe the biochemical process of biological fixation of nitrogen. write the general equation of biological nitrogen fixation.

    asked by furqan on December 18, 2012
  75. Physics

    In ammonia, 14g of nitrogen combines completely with 3g of hydrogen. How many grams of hydrogen are needed to combined completely with 56 g of nitrogen? Need Help

    asked by Please help on October 14, 2014
  76. Biology

    Need help with these: 33. In addition to causing disease, protests also affect humans through a. their role in the nitrogen cycle b. their antibiotic properties c. their ability to clean up oil spills d. all of the above A? 35. Fungi obtain food by a.

    asked by mysterychicken on February 21, 2010
  77. statistics

    The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. What percentage score above 1300? What percentage score above 800?

    asked by Jeremy on September 21, 2014
  78. math

    about what percentage of the population believe saying F to ber true? = what percentage of 250148571.0 = 136,800,000?

    asked by Anonymous on October 29, 2012
  79. science

    what will be the law of conversion of a) 65 grams 70 grams b) magnesium + oxygen = magnesium oxide 45 grams ? grams 80 grams c) sodium hydroxide + hydrochoride acid 40 grams 36.5 grams sodium chloride + water ? grams 18 grams

    asked by Magaly on August 4, 2012
  80. statistic

    Using the 68-95-99.7 rule: 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 Sonia on August 24, 2011
  81. Statistics

    The Graduate Record Examination (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: 1. Draw a rough sketch,

    asked by Jill on September 23, 2014
  82. Math

    The amount of nitrogen dioxide A in parts per million (ppm) that was present in the air in the city of Homer on a certain day in June is modeled by the function A(t) = -2t^2 + 32t + 12, where t is the number of hours after 6:00 A.M. Use this function to

    asked by Bryce on June 14, 2012
  83. Chemistry

    10.0 grams of magnesium reacted with fluorine to produce MgF2 Find balance equation: 2MgF2=2MgF 1)can someone explain to me how many grams of fluorine reacted with magnesium. 2)How many grams of MgF2 were formed in the reaction?

    asked by malina on December 2, 2012
  84. Chemistry

    An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? 2.56 x 10^-3 mol Al(OH)3 is that correct? b. What is the mass in milligrams of 0.0457 mole of magnesium

    asked by Tiffany on July 1, 2013
  85. Chemistry

    Potassium reacts with magnesium bromide to form potassium bromide and magnesium. Which equation correctly represents the statement? 2K+MgBr_2→2KBr+Mg K+MgBr→KBr+Mg K+MgBr_2→KBr_2+Mg 2KBr+Mg→2K+MgBr_2 A?

    asked by Quinn on November 30, 2018
  86. Chemistry

    A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl (aq) . When the liberated H2 (g) is collected over water at 29 degrees celsius and 752 torr, the volume is found to be 301 mL . The vapor pressure of water at 29

    asked by Jake on February 28, 2011
  87. science

    A piston pump containing 2 liters of nitrogen gas at 3000 psia (absolute) pressure empties its entire contents into a 10 liter pressure container. Before the transfer of gas the 10 liter container already contained nitrogen gas at 100 psia (absolute)

    asked by Stephanie on February 24, 2012
  88. CHEMISTRY

    Silver reacts with nitric acid to form nitrogen monoxide, silver nitrate and water. Calculate the volume of nitrogen monoxide gas (@STP) that can be produced from the reaction of 5.00g of silver?

    asked by Pip on October 7, 2013
  89. Environmental Science

    Explain how the nitrogen used for making proteins in a lion's body traveled from the atmosphere to the lion. How will it be returned to the atmosphere after the lion dies? Google Nitrogen cycle animal

    asked by Qiayamah on December 23, 2006
  90. chemistry

    Write a balanced chemical equation for the reaction of solid magnesium with aqueous iron(II) chloride to form aqueous magnesium chloride and solid iron. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.)

    asked by robert nelson on October 9, 2012
  91. Chemistry

    Please show me the steps..... At STP, 3.00 L of nitrogen gas contains the same number of molecules as A) 1.00 L of nitrogen gas B) 2.00 L of oxygen gas C) 3.00 L of chlorine gas D) 4.00 L of hydrogen gas

    asked by Kiesha on December 1, 2010
  92. chemistry

    1. Pouring liquid nitrogen onto a balloon decreases the volume of the balloon dramatically. Afterward, the balloon reinflates. Use the kinetic theory to explain teis sequence of events. Temperature of liquid nitrogen is -196 degrees C.

    asked by Anonymous on January 24, 2008
  93. Chemisty

    Pouring liquid nitrogen onto a balloon decreases the volume of the balloon dramatically. Afterward, the balloon re-inflates. Use kinetic theory to explain this sequence of events. The temperature of liquid nitrogen is -196 degrees Celsius

    asked by Kelly on April 28, 2017
  94. Chemistry

    Iron and manesiu are two common elements found in numerous compounds. magnesium is always in the +2 oxidation state while iron exhibits oxidation states of +2, +3,+4,and +6. why would magnesium not be found in the these upper oxidation states.

    asked by Anonymous on May 20, 2009
  95. Chemistry honors

    20 grams magnesium metal react with excess oxygen and 28 grams of magnesium oxide are produced in lab what is percent yield? If 99.8 g of aluminum nitrate are reacted with excess sulfuric acid what would be the theoretical yield in grams of aluminum

    asked by lynn on December 5, 2014
  96. Chemistry

    Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2Mg(s)+O2(g)→2MgO(s) When 10.1 g of Mg are allowed to react with 10.5 g of O2, 14.5 g of MgO are collected. a) Determine the

    asked by Beth on October 19, 2016
  97. college Algebra

    Please explain with complete step by step instructions. #8)One type of lawn fertilizer consists of a mixture of nitrogen, phosphorus and potassium. An 80lb sample contains 8 move lbs of nitrogen and phosphorus than potassium. There is 16lb more potasssium

    asked by Lee on November 22, 2010
  98. college

    Please explain with complete step by step instructions. #8)One type of lawn fertilizer consists of a mixture of nitrogen, phosphorus and potassium. An 80lb sample contains 8 move lbs of nitrogen and phosphorus than potassium. There is 16lb more potasssium

    asked by Lee on November 23, 2010
  99. Chem

    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
  100. chemistry

    A 0.12-mole sample of nitrogen gas occupies a volume of 2.55 L. What is the volume of 0.32 mol of nitrogen gas under the same conditions?

    asked by BB on December 9, 2011