# i need the exat percentage of nitrogen in magnesium nitride

6,975 results, page 9
1. ## Java

I need to write a Java program using an input file with the below data. I don’t even know where to begin. I have written others but this one has me totally confused. I know how to do it using math WL% = Wins / (Wins + Losses) I also wrote this to use

asked by Jay on April 5, 2008
2. ## Statistics

The Graduate Record Exam 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. A. What percentage of the persons who take the test score above 1300? b.

asked by Charlene on November 23, 2014
3. ## statistics

How many TV's are there in your household?” was one of the questions on a questionnaire sent to 5000 people in Japan. The collected data resulted in the following distribution: Number of TVs/Household 0 1 2 3 4 5 or more Percentage 1.9 31.4 23.0 24.4

asked by MissPatte on August 30, 2014
4. ## chemistry

If you mixed 100 grams of magnesium nitrite with 100 grams of lithium phosphide and made magnesium phosphide and lithium nitrite how many grams of each product would you make and how many grams of each reactant would be left over at the end.

asked by anonymous on February 23, 2016
5. ## chemistry

if you mixed 100 grams of Magnesium nitrite with 100 grams of Lithium Phosphide and made magnesium phosphide and lithium nitrite how many grams of each product would you make and how many grams of each reactant would be left over at the end?

asked by Anonymous on February 23, 2016
6. ## Stoichiometry

if you mixed 100 grams of Magnesium nitrite with 100 grams of Lithium Phosphide and made magnesium phosphide and lithium nitrite how many grams of each product would you make and how many grams of each reactant would be left over at the end?

asked by Anonymous on March 8, 2016
7. ## Chemistry

Magnesium metal reacts with phosphoric acid to produce hydrogen gas. If 50 g of phosphoric acid is used, how much magnesium metal is needed? How much hydrogen gas is produced?

asked by Crystal on February 5, 2014
8. ## statistics

Given a distribution of scores with a mean of 26 and standard deviation of 6. assuming normality what percentage of the cases fall between 18 and 27, what percentage of the cases lie above score 18 and below 29

asked by Anshika Srivastava on April 16, 2010
9. ## chemistry

QUESTION 11 Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 84.0 g of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 85.0 g of ammonia,

asked by Anonymous on July 11, 2016
10. ## chem

a gas mixture is comprised of 32% oxygen and the rest is nitrogen. If the scuba tank is pressurized to a total pressure of 132 atm what are the partial pressures of the oxygen and nitrogen inside the tank? I'm having trouble understanding how to find

asked by Anna on May 30, 2016
11. ## Algebra

the price of technology stock has risen to 9.68. Yesterday's price was 9.57. Find the percentage increase. Round to the nearest tenth. 9.68-9.57 0.11 I can't figure out how to get the percentage

asked by Malicha on January 21, 2017
12. ## Math

calculate the rate percentage per year if \$3240 is paid as intrest on 12000 for 2 and a half years. whats percentage pre year?

asked by Amanda on April 8, 2016
13. ## math

A student spends 37.5% of his money on food 28.75%on rent and 15% on books. what percentage what percentage of her money is left to spend on other things

asked by Nita on April 5, 2016
14. ## chemistry

a pressure of 96.5Kpa is exerted by a mixture of nitrogen gas and water vapor in a equilibrium with liquid water at 18 degree celcius , what is the partial pressure exerted by the nitrogen gas?

asked by nimmy on November 6, 2012
15. ## science

What solubility of hydrogen and nitrogen is in liquid ammonia? Does any formula exist for calculation a solubility of hydrogen and nitrogen in liquid ammonia or do you know specific constants or numbers for this question? Thank you for your answers.

asked by Kika on May 22, 2014

What solubility of hydrogen and nitrogen is in liquid ammonia? Does any formula exist for calculation a solubility of hydrogen and nitrogen in liquid ammonia or do you know specific constants or numbers for this question? Thank you for your answers.

asked by Kika on June 6, 2014
17. ## Chem

Living things require oxygen for respiration. Fuels require oxygen for burning. Air contains much more nitrogen than oxygen. Is it a good thing to have more oxygen than nitrogen in air? Explain your answer.

asked by Nicole on October 5, 2011
18. ## chemistry

Ammonia is often produced by reacting nitrogen gas with hydrogen gas. How many liters of ammonia gas can be formed from 12.9 L of hydrogen gas at 93.0°C and a pressure of 43.5 kPa? (Assume an excess amount of nitrogen gas.) I have absolutely no idea how

asked by kendall on March 17, 2015
19. ## application statistic

assume that a set of test score is normally distrubuted with a meanof 100 and a standard deviation of 20 find the quantities using the 68-95-99.7 rule to get: the percentage of scores less than 100: B) relative frequency of scores less than 120 c)

asked by Latoya on June 7, 2010

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. A)What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.

asked by Rose on October 15, 2009
21. ## Chm

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.

asked by Karina on October 10, 2008
22. ## Chemistry

Write the symbol and electron configuration for each ion and name the noble gas with the same configuration. a. nitride _________________________ b. oxide ___________________________ c. sulfide _________________________ d. bromide _________________________

asked by Greg on October 9, 2012
23. ## Chemistry

What happens when magnesium is added to Maleic and Fumaric acid? What gas is released from this reaction? I was also wondering if their are any differences between how each acid reacts with the magnesium because one is cis and the other trans. What happens

asked by Sean on October 3, 2010
24. ## math

I need to find what 0.10 is a percentage of 0.72. and what 0.10 is a percentage of 0.62. Please help asap!!!!!

asked by shaista on June 29, 2010
25. ## Math

The circle graph shows data on the suitability of land for farming. Which three categories together account for exactly half of the land? The percetage for Too Shallow is 13% The percentage for Chemical Problems is 25% The percentage for Too Dry is 30% The

asked by Anonymous on March 17, 2015
26. ## Statistics

The table I have is: Color of Candy Frequency Proportion (as a fraction and decimal) Percentage Red 13 13/100 or .13 13% Orange 25 25/100 or .25 25% Yellow 8 8/100 or .08 8% Brown 8 8/100 or .08 8% Blue 27 27/100 or .27 27% Green 19 19/100 or .19 19%

asked by Destiny Park on July 13, 2015
27. ## chemistry

When nitrogen dioxide (NO2) from car exhaust combines w/ water in the air it forms nitric acid (HNO3), which causes acid rain, and nitrogen monoxide. 3NO2(g)+ H2O(L)----->2HNO3(aq)+ N(g) a.How many molecules of NO2 are needed to react with 0.250 mole H2O?

asked by anonymous 78 on October 19, 2012
28. ## chemistry

Draw the three dimensional structure of hydrazine (H2N-NH2) and answer the following questions about what you have drawn. How would you describe the geometric arrangement of electron domains around each nitrogen? linear trigonal planar tetrahedral trigonal

asked by Dick on December 21, 2013
29. ## Chemistry

Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen 14) monoxide and oxygen according to the following chemical equation. 2 NO2(g) → 2 NO(g) + O2(g). A sample of NO2(g) is initially placed in a 2.50-L reaction vessel at

asked by Maylen on September 21, 2011
30. ## Chemistry

Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen 14) monoxide and oxygen according to the following chemical equation. 2 NO2(g) → 2 NO(g) + O2(g). A sample of NO2(g) is initially placed in a 2.50-L reaction vessel at

asked by Maylen on September 21, 2011
31. ## Math

I am having a hard time figuring this out. Can someone assist me in the right direction? Here is the problem: 5. When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of \$5,000. Refer to the

asked by Sarah on April 7, 2010
32. ## Percentage

On a rainy day,out of 150 students in a school 25 were absent.find the percentage of students absent from the school? What percentage of students are percentage?

asked by Keerthan on October 16, 2016
33. ## chemistry

Henry's law constant for N2 and O2 is 1.6 *10^-6and 8.77*10^-7 molal/mm Hg at 298k.Air has 78 mole percentage N2 and 21 mole percentage O2.at atmospheric pressure the ratio of solubility of N2 and O2 in water is?

asked by Rahul on May 10, 2016
34. ## Math

Alice usually has a 80% shooting percentage in basketball. On Monday she scored 16 baskets in 22 attempts. If she scores her usual percentage on Tuesday by scoring 20 baskets, how many shots did she attempt?

asked by Anonymous on October 17, 2013
35. ## statistics

To find out what people think, the Gallup Poll selected a random sample of 520 women and 506 men. The pollsters showed them a list of personal attributes and asked them to indicate whether each attribute was “generally more true of men or of women”.

asked by Devin on June 27, 2014
36. ## Chemistry2

An electrochemical cell is created using gold and magnesium half-cells. a. Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell. You do not need to diagram the

37. ## Chemistry

An electrochemical cell is created using gold and magnesium half-cells. a. Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell. You do not need to diagram the

asked by Jeffery on November 30, 2010
38. ## AP Chem

An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

asked by Sarah on March 10, 2012
39. ## Chemistry

Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer? a. iron azide, Fe(N3)2, MW = 140 g/mol b. sodium azide, NaN3, MW = 65 g/mol c. potassium nitrite, KNO2, MW = 85.1 g/mol d. potassium azide, KN3, MW

asked by Anonymous on November 8, 2015
40. ## AP chem

An apparatus consists of a 4 L flask containing nitrogen gas at 32C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

asked by Sarah on March 9, 2012
41. ## Science

Which of the following is NOT true of bacteria? a. Bacteria change the sugar in milk to lactic acid. b. Bacteria change nitrogen into a form plants can use. c. Bacteria change harmful chemicals into harmless ones. d. Bacteria change oxygen into nitrogen.

asked by T.J And the Vibe on February 1, 2013
42. ## Chemistry

For the following reaction, 0.506 moles of ammonia are mixed with 0.458 moles of oxygen gas. ammonia (g) + oxygen (g) nitrogen monoxide (g) + water (g) What is the FORMULA for the limiting reagent? What is the maximum amount of nitrogen monoxide that can

asked by Jamal on September 21, 2007
43. ## science

Describe the carbon family of elements and the nitrogen family of elements You can go to www.webelements and look at the carbon group and nitrogen group. Look at each element, especially the first two or three in each group, and you will see the

asked by Shamika on November 11, 2006
44. ## Chemistry

Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer? a. iron azide, Fe(N3)2, MW = 140 g/mol b. sodium azide, NaN3, MW = 65 g/mol c. potassium nitrite, KNO2, MW = 85.1 g/mol d. potassium azide, KN3, MW

asked by Sarah on November 9, 2015
45. ## physics

Percentage error in displacement time and mass are 2%, 1% and 3%. Find percentage error in the measurement of force.

asked by niharika on July 15, 2012
46. ## math

A factory kept increasing it's output by the same percentage every year .find the percentage if it is known that the output is doubled in the last two years.

asked by daisy on December 4, 2016
47. ## HONORS CHEMISTRY

A synthesis of nitrogen dioxide from nitrogen and oxygen. There are 5.000 mol of N2 and 8.000 mol of O2 mixed in a 5.000-L flask. What is the equilibrium constant for the synthesis?

asked by helpless on March 17, 2010
48. ## . 8th grade math

. Mkay ! So, one molecule of nitrogen reacting w/3 molecules of hydrogen makes 2 of ammonia. How many molecules of nitrogen must react w/42 molecules of hydrogen to make 28,of ammonia?

49. ## Chemistry

A 3.000 gram sample of an unknown compound containing the elements carbon, hydrogen, and nitrogen is analyzed by combustion. The combustion releases 4.714 grams of carbon dioxide and 1.500 grams of nitrogen. If 25 molecules have a combined mass of 4.65 x

asked by Mom on October 18, 2011
50. ## chemistry

The problem: Nitrogen can react with steam to form ammonia and nitrogen monoxide gas. A 20.0L sample of nitrogen at 173C and 772mmHg is made to react with an excess of steam. The products are collected at room temperature (25C) into an evacuated flask with

asked by Gweedo on June 17, 2009
51. ## Proteins (Help!)

What elements make up proteins? Is it carbon, oxygen, hydrogen, and nitrogen? Or is it carbon, oxygen. hydrogen, nitrogen, and sulfur?

asked by Victoria on March 24, 2016
52. ## Chemistry/lab math

A stock standard of urea nitrogen contains 20 mg/mL of urea nitrogen. How much stock is needed to prepare 100 mL of a 20 mg/dL working standard? Please help!

asked by Anonymous on August 7, 2013
53. ## Chemistry

1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.i m a student

asked by Rao on August 3, 2015
54. ## Intro to Physics

At what temperature would the rms speed of a nitrogen atom equal the following speeds? (Note: The mass of a nitrogen atom is 2.324 10-26 kg.) (a) the escape speed from Earth, 1.12 104 m/s ___________K (b) the escape speed from the Moon, 2.37 103 m/s

55. ## PHYSICS

At what temperature would the rms speed of a nitrogen atom equal the following speeds? (Note: The mass of a nitrogen atom is 2.324 10-26 kg.) (a) the escape speed from Earth, 1.12 104 m/s _____K (b) the escape speed from the Moon, 2.37 103 m/s _____K

asked by Sarah on November 14, 2012
56. ## math (cant figure it out)

Activity Boys Girls Total Walk 3 6 Bike 5 3 Skateboard 2 1 Total ______________ What percentage of the total students chose skateboarding? 10% 20% 30% none of these** . 4. What percentage of the boys chose walking? 30%* 45% 25% none of these . 5. What

asked by person on April 20, 2014
57. ## chemistry

So the question I have is: Calculate the pressure of dry hydrogen collected. (Use the water temperature). And the evidence that we obtained was: Length of magnesium 3.8Cm Mass of 1 m of magnesium 1.254g Volume of hydrogen collected 67mL Air temperature 27C

asked by amy on May 10, 2017
58. ## 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 diviation of 20. Use the 68-95-99.7 rult to find the following quantities: percentage of scores less than 100 relative frequency of

asked by margaret on August 19, 2010
59. ## Math Calculator help

Assume that a normal distribution has a mean of 21 and a standard deviation of 2. Use the empirical rule to find the percentage of values that lie above 23. Now I did this on the Ti 83 by using Normalcdf(-5,1) and getting an answer of 0.84 and then 1-0.84

asked by HM on November 25, 2011
60. ## Chemistry

1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.

asked by Rao on August 3, 2015
61. ## Chem (solubility of MF2, check my work)

The Ksp of magnesium fluoride is 6.4E-9. Calculate the solubility (in grams per liter) of magnesium fluoride in water. MgF2 Mg^2+(aq) + 2F^-(aq) [Mg^2+] = x & [2F^-] = 2x (x)(2x^2) = 6.4E-9 4x^3 = 6.4E-9 x^3 = 1.6E-9 x = 1.2E-3 [Mg^2+] 2x = [F^-] = 2.4E-3

asked by Kizner on June 12, 2006
62. ## Physics

a)If a Magnesium nucleus is fixed a distance away from a charge, what is the magnitude of the electrostatic force it experiences in Newtons (yes, it is a small force in Newtons)? b)If the charge is at the origin and the Magnesium nucleus is from the origin

asked by Anton on November 9, 2013
63. ## chem

which of th gases is obtained industrially by fractional distillation. is it ammonia or chlorine or hydrogen or nitrogen? Nitrogen is obtained industrially by fractional distillation of liquid air.

asked by holly on December 7, 2006
64. ## Chemistry

An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over

asked by Anonymous on October 20, 2014
65. ## chemistry

A sealed container comtains 1.50 mol of nitrogen gas, 2.00 mol of oxygen gas and 3.50 mol of argon gas. If the total pressure is 900 kPa, what is the pressure of the nitrogen gas? I don't know which formula to use

asked by Cutter on January 19, 2015
66. ## Stoichiometry

Balance. Ammonia + oxygen yields Nitrogen + water. Then, given the moles of reactant or product below, determine the corresponding amount in moles of each of the other reactants and products. a)4 mol Ammonia b)4 mol of Nitrogen c)4.5 mol oxygen

asked by Sandy on December 5, 2007
67. ## Math

Equation: t=5(logP/log0.5) P is the percentage of caffiene in the bloodstream related to t, time elapsed in hours Suppose you drink a cup of coffee at 9:00 a.m. What percentage of the caffiene will remain in your body at noon?

asked by Zoe on January 12, 2015
68. ## CHEMISTRY

Nitrogen and hydrogen react to form ammonia. Consider the mixture of N2 and H2 in a closed container as illustrated below. The container contains 6 hydrogen atoms and 6 nitrogen atoms (all diatomic) Assuming the reaction goes to completion, draw a

asked by Mary on March 3, 2010
69. ## applying stoichiometry

4.00kg nitrogen dioxide reacts with 1.00kg water to produce nitric acid and nitrogen monoxide. Determine the limiting reactant and the theoretical yield of nitric acid in grams. How many grams of excess reactant are present after the reaction is complete?

asked by danielle on February 5, 2012
70. ## science HELP!!!!!!!!!

What role does nitrogen play in plant growth

asked by SW on October 22, 2006
71. ## chemistry

Nitrogen and oxygen react to form nitric oxide (NO). All substances are in the gas phase. If 0.352 atm of nitrogen and 0.511 atm of oxygen react, what is the partial pressure of nitric oxide (in mmHg) when this reaction goes 73.9 complete. The temperature

asked by shaina on April 10, 2014
72. ## chemistry

Nitrogen dioxide abstracts with water vapor to produce oxygen and ammonia gas. If 12.8 grams of nitrogen dioxide reacts with 5.00 liter of water vapor at 375 degrees celisus and 725 tore, how many grams of ammonia can be produced? Use an ice table.

asked by sally on November 2, 2014
73. ## Astronomy

Hi! ____ 11. What molecules can be found in the interstellar medium? (1 point) a) water, carbon dioxide, and hydrogen b) oxygen, nitrogen, and ammonia c) nitrogen, carbon dioxide, and oxygen d) hydrogen, helium, and methane My Answer: B Could someone

asked by Da Fash on November 24, 2017
74. ## Chemistry

Can you check if this is correct please: Reactivity order for these metals (top being most reactive): - Magnesium (I'm not sure if Magnesium or Manganese should be at the top) - Manganese - Zinc - Copper Reactivity order for these acids (top being most

asked by Franky on October 9, 2011
75. ## Chemistry

Can you check if this is correct please: Reactivity order for these metals (top being most reactive): - Magnesium (I'm not sure if Magnesium or Manganese should be at the top) - Manganese - Zinc - Copper Reactivity order for these acids (top being most

asked by Franky on October 9, 2011
76. ## College Chemistry

A mixture of the compounds sodium oxide and magnesium chloride contains 2.4182 g of sodium oxide and is 89.3 % by mass magnesium chloride. The sodium oxide is 74.200 % by mass sodium. Calculate the moles of oxygen in the mixture. Thanks in advance.

asked by Lance on April 4, 2012
77. ## Chemistry

-Describe the zero sum rule -True of False: The formula for the nitride ion is N^(-3) -True of False: The stock system shows the charge on the negative ion

asked by Alyssa on October 1, 2014
78. ## AP Chemistry

A 1277 mL sample of nitrogen (N2) was collected by displacement of water at 24 degrees C under a total barometric pressure of 966 torr. What mass of dry nitrogen was collected? The vapor pressure of water at 24 degrees C is 22 torr. Answer in units of g

asked by Gabriella on February 16, 2014
79. ## Chemistry

Pantothenic acid id one of the B vitamins. A sample of pantothenic acid was found to produce 3.84 mL of nitrogen gas, N2 at 23 degrees celsius and 785 mmHg. What is the volume of the nitrogen gas (in liters) produced as 29 degrees celsius and 0.993 atm?

asked by Kirstyn on February 28, 2013
80. ## General Chemistry

The burning of the magnesium becomes uncontrolled (its burns brightly). Oops! How will this procedural error affect the reported mole ratio of magnesium to oxygen in the analysis? Explain. Mass of crucible and lid 23.96g Mass of Sample (Mg) .1018g Heating

asked by autum on September 26, 2010
81. ## Science

-Describe the zero sum rule -True of False: The formula for the nitride ion is N^(-3) -True of False: The stock system shows the charge on the negative ion Answer this Question

asked by Al on October 1, 2014
82. ## chemical equations

Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide. Li3N(s) + 3H2O(l) > NH3(g) + 3LiOH(aq) What mass of water is needed to react with 32.9 g Li3N?

asked by Tristan on February 7, 2010
83. ## chemistry

a) Calculate the number of moles of nitrogen dioxide, NO2, that could be prepared from 79.0 mol of nitrogen oxide and 82.0 mol of oxygen. 2NO(g)+O2(g)⟶ 2NO2(g) b) Identify the limiting reagent and the excess reagent in the reaction. What would happen to

asked by Will on August 24, 2014
84. ## Chem-organic, bio, intro

A gas mixture contains oxygen and argon at partial pressures of 0.60 atm and 425 mmhg. If nitrogen gas added to the sample increases the total pressure to 1250 torr, what is the partial pressure in Torr of the Nitrogen added? Steps for solving this problem

asked by Ashleigh on October 16, 2011
85. ## chemistry

The percentage of C,H,O in vitamin C were determined by burning a sample weighing 2.00g. The masses of carbon dioxide and water formed are 3.00mg and 0.81mg respectively. Find the percentage of each element and the empirical fomula of vitamin C

asked by Jude Patrick on October 22, 2014
86. ## accouting

Nancy Company has budgeted sales of \$300,000 with the following budgeted costs: Direct materials \$60,000 Direct manufacturing labor 40,000 Factory overhead Variable 30,000 Fixed 50,000 Selling and administrative expenses Variable 20,000 Fixed 30,000

asked by eric on April 2, 2011
87. ## chemistry

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

asked by anonymous on April 10, 2013
88. ## Statistics

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: five percentage points; confidence level 90% from a prior study, ^p is estimated by the decimal equivalent 56% n= (Round up to

asked by Rob on April 30, 2013
89. ## HEAT

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a

asked by Sydney on December 7, 2010
90. ## HEAT

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a

asked by Sydney on December 8, 2010
91. ## chemistry

Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate

asked by Luis on December 14, 2014
92. ## Chemistry

Nitrogen Dioxide NO2 decomposes upon heating to form nitric oxide and oxygen according to the following equation: 2NO2(g) --> 2NO(g) + O2(g) At the beginning of an experiment the concentration of nitrogen dioxide in a reaction vessel was 0.113 mol/L. After

asked by Lauren on February 17, 2008
93. ## marketing

she purchase a lamp for Rs. 900 and sell it for Rs. 1500, determine the following a)rupee markup, b)markup percentage on cost, c)markup percentage of selling price

asked by rony on January 20, 2013
94. ## Chemistry

Nitrogen and hydrogen combine at high temperature, in the presence of a catalyst, to produce ammonia. N2(g)+3H2(g)-->2NH3(g) Assume 4 molecules of nitrogen and 9 molecules of hydrogen are present. After complete reaction, how many molecules of ammonia are

asked by Lynn on October 7, 2012
95. ## chemistry

QUESTION 10 Ammonia gas is formed from nitrogen gas and hydrogen gas according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 112 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 120 grams of

asked by Anonymous on July 11, 2016
96. ## chemistry

Calculate (a) the moles and (b) the mass of magnesium carbonate at the start if 0.2 moles of sulfuric acid is added to the magnesium carbonate and the excess sulfuric acid made up to a 250 cm3 solution. 25 cm3 of this solution required 0.03 moles of sodium

asked by sabs on October 9, 2014
97. ## Chemistry

Nitrogen dioxide decomposes on heating according to the following equation 2NO2 (g) ↔ 2NO (g) + O2 (g) When 4 mole of nitrogen dioxide were put into a 1dm3 container and heated to a constant temperature, the equilibrium mixture contained 0.8 mole of

asked by Shahab Mirza on October 3, 2014
98. ## Math

How do you convert fractions to a percentage? give me an example and ill explain what is the percentage for 7/4? divide 7 by 4. 1.75 multiply by 100 175 7 is 175 percent of 4. so, 175% = 7/4?

asked by Courtney on November 29, 2006