# i need the exat percentage of nitrogen in magnesium nitride

6,975 results, page 36
1. ## maths

A Shopkeeper bought a cassette for Rs40 and sold it for Rs55. (a) what was his profit? (b) Express the profit as a percentage of.the cost price.

asked by sonali on March 26, 2016
2. ## chemistry

I am given the following reaction: 2NH3(g) -------> N2(g) + 3H2(g) My question is: 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture

asked by ChemTeach on May 26, 2008
3. ## chemistry

I am given the following reaction: 2NH3(g) -------> N2(g) + 3H2(g) My question is: 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture

asked by Shivani on May 26, 2008
4. ## chemistry

a 12.5 g sample of oxygen gas is added to a 25.og sample of nitrogen gas in a 25.0L'Container at 28 C. Calculate the partial pressure of each gas and the total pressure of he mixture. answer

asked by Anonymous on January 9, 2013
5. ## Chemistry

At standard temperature and pressure, a 1.00-mol sample of argon gas is vented into a 22.4-L rigid box that already contains 1.00 mol of nitrogen gas. We would expect the argon gas to:

asked by Julie on February 19, 2015
6. ## chemistry

A 5.0 L sample of nitrogen gas has a pressure of 95 kpa. What is the final volume of the gas if the pressure is tripled? I know p1 = 95, v1=5.0 and p2 = tripled What i don't understand is what number is tripled, is it 95 times 3??

asked by Sandy on January 15, 2015
7. ## Chemistry

If 1.22 grams of magnesium reacts with 100 ml of 6.02 M HCl solution. How much heat is evolved? Density of the HCl solution is 1.10 g/ml. Assume the specific heat of water 4.184 J/gC is the specific heat of the solution. Mg  +  2 HCl   à  MgCl2  +

asked by Anonymous on July 17, 2012
8. ## chem

lead (IV) hydroxide- ionic cation= +4 anion= -1 chemical formula= Pb(OH)4 Magnesium phosphate-ionic cation= +2 anion= -2 chemical formula= MgPO4 is ammonium sulfate molecular or ionic?

asked by greeny on August 21, 2012
9. ## Chemistry

Describe what hard water is and how a water softening unit works. Provide balanced chemical equations to show how sodium sulphate can remove these ions (Magnesium and Calcium). The first was no problem, but I am having trouble trying to get through the

asked by Hannah on July 17, 2012
10. ## Chemistry

Each Rolaids tablet contains .550 g of calcium carbonate and .110 g of magnesium hydroxide. Kroger Extra Strength antacid tablets contain .750 g of calcium cabonate per tablet. What is the neutralizing ability per gram for each tablet in mol/g? Might not

asked by Bob on February 20, 2007
11. ## Chemistry

Predict whether the Ph endpoint is =7 >7, or

12. ## Chemistry

A gas sample at STP contains 1.15 oxygen and 1.55g nitrogen. What is the volume of the gas sample? the answer 2.04. I want to know how to get the that answer

asked by Mark on October 18, 2015
13. ## Chemistry

1) What volume of 1.25 mol/L hydrobromic acid, HBr(aq) will neutralize 75.0 ml of 0.895 mol/L magnesium hydroxide Mg(OH)2(aq)? 2) a 25.00 mL sample of a nitric acid solution , HNO3(aq) is neutralized by 18.55mL of a 0.1750 mol/L sodium hydroxide, NaOH(aq)

asked by Krystien on March 20, 2013
14. ## Chemistry

1) What volume of 1.25 mol/L hydrobromic acid, HBr(aq) will neutralize 75.0 ml of 0.895 mol/L magnesium hydroxide Mg(OH)2(aq)? 2) a 25.00 mL sample of a nitric acid solution , HNO3(aq) is neutralized by 18.55mL of a 0.1750 mol/L sodium hydroxide, NaOH(aq)

asked by Katlyn on March 21, 2013
15. ## Chemistry

1. Calculate the number of moles of carbon atoms present in 2.4g of ethanol (C2H6O). 2. What is the % Nitrogen by weight in 3.696 mol of ammonium sulfide. 3. How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is

asked by Jessica on October 28, 2010
16. ## Algebra

Tara’s website, Garden Edibles, specializes in the sale of herbs and flowers for colorful meals and garnishes. Tara sells packets of nasturtium seeds for \$0.95 each and packets of Johnny-jumpup seeds for \$1.43 each. She decides to offer a 16-packet

asked by Susie on May 14, 2010
17. ## Chemistry

A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid,

asked by Anonymous on October 8, 2010
18. ## Chemistry

A sample of magnesium metal reacts with hydrochloric acid solution to produce magnsesium chloride solution and hydrogen gas. a)write a balanced chemical equation for this reaction and include phase designations. The phase designations would be s for solid,

asked by Anonymous on October 7, 2010
19. ## Chemistry

A 19.9mL volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate, producing 183mL of CO2 that is collected over water at 24.0 degrees C and 738 torr total pressure. The vapor pressure for water at 24.0 degrees C

asked by Michelle on April 18, 2013
20. ## chemistry

25.75 mL of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate producing 170.8 mL of CO2 which is collected over water at 24.00°C and 731.0 torr total pressure. The vapor pressure of water at 24.00°C is 22.4 torr. 2

asked by Anonymous on December 10, 2013
21. ## Physics

2. A Sample of V1=6.2L of pure nitrogen gas at 21.85 degrees Celsius and total pressure (gauge plus ambient) of p1=155,700 Pa is heated so that the vrms for the gas molecules increase by 9%. Find the new absolute temperature for the gas, and compute the

asked by Dawna on January 22, 2013
22. ## biology

A dominant gene V in humans causes certain areas of the skin to become depigmented, a condition called "vitiligo." Albinism is the complete lack of pigment production and is produced by the recessive genotype aa. The albino locus is epistatic to the

asked by Alex on December 12, 2011
23. ## managerial finance

Completed all answers except the last one and I am stuck. Can someone please show me how to solve? I can't figure it out and I would like to have the steps so I can learn how to solve. Thank you! Jiminy's Cricket Farm issued a 30-year, 7.2 percent

asked by JoJo on November 25, 2015
24. ## mass and human body

By mass, most of human body is composed of what? nitrogen carbon water hydrogen I think the answer is water. Am I correct? http://www.madsci.org/posts/archives/may2000/958588306.An.r.html so am I correct in saying that it is water? I don't need

asked by David on January 14, 2007
25. ## Chemistry

Express the concentration of a 0.0860 M aqueous solution of fluoride, F–, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.

asked by Heather on February 21, 2012
26. ## statistics

Assuming the resting heart rates for a sample of individuals are normal distibuted with a mean of 70 and a standard deviation of 15. Waht percentage of rates less than 70

asked by Darlene Watson on November 12, 2010
27. ## goverment

which region of the nation receives the highest percentage of its revenues form the federal goernment> a. south b. northeast c. northeast e. west

asked by tdp on January 30, 2012

Cassandra is repaying an installment loan of \$3,500 with 20 equal monthly payments of \$196 each. what is the annual percentage rate of the loan?

asked by Sandy on June 19, 2011
29. ## math

Cassandra is repaying an installment loan of \$3,500 with 20 equal monthly payments of \$196 each. What is the annual percentage rate of the loan?

asked by alisha s. on September 24, 2010
30. ## physics

Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface.

asked by hanna on January 28, 2014
31. ## Math

You purchased a pair of shoes on sale for \$46.75. The original price was marked as \$55.00. Find what by percentage the shoes were reduced (ignoring tax).

asked by Ghost on October 2, 2017
32. ## chemistry

FIND THE PERCENTAGE BY VOLUME COMPOSITION OF A VINEGAR SOLUTION CONTAINING 10cm (TO THE POWER OF 3) OF ACETIC ACID AND 190 (TO THE POWER OF 3)OF H2O

33. ## Math

I need to change this number to a percentage, rounded to the nearest tenth. 1350-1010/1010=.336633663 would the answer be 3%? this one is confusing to me for some reason

asked by Amy on March 31, 2010
34. ## Math

Compute the Annual Percentage Yield (APY) for the investment in the previous question. (Round APY to the nearest hundredths of a percent.)

asked by Bonnie on January 11, 2014
35. ## Chem

Express the concentration of a 0.0700 M aqueous solution of fluoride, F-, in mass percentage and in part per million. Assume the density of the solution is 1.00 g/mL.

36. ## Physics

Devise the series or parallel combination of 2 capacitances from the E6 series that gives the closest match to the capacitance 1.14 μF. Indicate the percentage error between the desired value and the value you obtain.

asked by Mike on March 10, 2016
37. ## Math

Find the annual percentage rate on a loan of \$1,500 for 18 months if the loan requires \$190 interest and is repaid monthly.

asked by Chol on July 6, 2014
38. ## Math

Question 11 of 20 5.0 Points The percentage analysis of changes of corresponding items in comparative financial statements is referred to as horizontal analysis. A. True B. Fals A

asked by Angela on December 20, 2013
39. ## Maths

Shopkeeper sells his goods at 20% above the cost price. What will be the percentage profit he will earn if he discounts the price by 10% and then offer a seasonal discount of 5%?

40. ## math

Compute the markup for the following problem. Cost of article = \$195 Retail price = \$225 Percentage of markup (to the nearest tenth)=

asked by wilton on May 2, 2014
41. ## Chemistry

Express the concentration of a 0.0900 M aqueous solution of fluoride, F–, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.

asked by Tsomo on July 7, 2014

Compute the Annual Percentage Yield (APY) for the investment in the previous question. (Round APY to the nearest hundredths of a percent.)

asked by Tee on June 28, 2013

Cassandra is repaying an installment loan of \$3500 with 20 equal monthly payments of \$196 each. What is the annual percentage rate of the loan?

asked by Terry on January 20, 2012
44. ## chemistry

By international agreement, the nautical mile is now defined as exactly 1852 meters. By what percentage does this current definition differ from the original definition?

asked by Anonymous on January 7, 2011
45. ## Calculus Help

Let P(t) be the percentage of Americans under the age of 18 at time t. The table gives values of this function in census years from 1950 to 2000. How would it be possible to get more accurate values for P'(t).

asked by Tenshi on February 27, 2014
46. ## statistics

If the grades on a police entrance exam are normally distributed with a mean of 100 and a standard deviation of 15, what percentage of students received grades of less than 115?

asked by Laura on April 1, 2012
47. ## Chemistry

No change of mass was observed when a definite amount of a mixture of KI and NaCl is converted to sulphate salts. What is the percentage composition of the mixture?

asked by Anamika on February 23, 2016
48. ## Math

Scores on the GRE are normally distributed with a mean of 541 and a standard deviation of 89. Use the 68-95-99.7 rule to find the percentage of people who score between 363 and 541

asked by Katelyn on April 30, 2017

find the annual percentage rate on a loan of \$1,500 for 18months if the loan requires \$190 interest and is repaid monthly.

asked by Donny on May 13, 2017
50. ## computers

Which type of chart would best illustrate each department's sales as a percentage of the overall store sales? Answer a. area b. bar c. line d. pie

asked by Anna on May 2, 2013

i need help NOW: A leather coat costs a fashion store \$150. THey will sell it for a 70% profit. Find the profit as a percentage of the selling price.

asked by charlotte on August 25, 2010
52. ## math

hello, im in 3rd grade and i need help on these 2 questions. 1) What is 3 as a percentage of 10? 2) The nth term rule for a sequence is 2n+3. Write the first 4 terms in this sequence. is question 1 30% thanks if you reply

53. ## Math

2. Assuming your weekly gross earnings are \$525, calculate your withholding tax using the wage bracket method and the percentage method.

asked by John on February 3, 2014
54. ## word problem

a computer company gives a discount of 10% on a new piece of software.If it makes a 40% profit what percentage does the marked price exceed the cost price

asked by jeff on February 6, 2011
55. ## chemistry

given that thee density of a supplied vinegar solution in an experiment is 1.025g/ml, what is the percentage acetic acid found in the vinegar sample?

asked by joy on April 20, 2013
56. ## Mathematics

A class has 32 pupils. If 12 are boys,what percentage of the class are girls?

57. ## Math

A store has a \$159.98 item on sale for \$79.99. What is the percentage off on this item?

asked by Dedrick on February 19, 2016
58. ## College Chem

how do i figure out the percentage error , as well as the absolute error of a) (10.00+/- .02)mL x .42 mol/L b) (10.00 +/- .02)mL + (10.00 +/- .02)mL

asked by eddie on January 16, 2009
59. ## statistics

what is the percentage that 2 random people can be chosen from a total of 14 people.

asked by john on January 26, 2011
60. ## math

What is the percentage of sugar in the syrup made of 10 kg of water and 2 kg of sugar?

asked by anonimous on February 3, 2018
61. ## Chermistry

Define the following terms 1 Maximum assay 2 Percentage assay

62. ## Biology

Can you give the speed in the capillaries as a percentage of the speed in the arteries.

asked by TOM on February 6, 2010
63. ## Math

What is the percentage increase from 132 million to 153.1 million?

asked by Tykrane on October 30, 2010
64. ## math

there are 28 students in a class. 16 of them are boys. What is the percentage of girls in the class?

asked by Anonymous on May 14, 2016
65. ## MATH

What is the percentage of sugar in the syrup made of 10 kg of water and 15 kg of sugar?

asked by Anonymous on February 19, 2017
66. ## statistics

if I rank 338 out of a class of 540 what percentage of the class am i in

asked by Anonymous on August 28, 2011
67. ## Math

How much longer (percentage) is a one-mile race than a 1500- race?

asked by Carrie on August 28, 2009
68. ## criminal law

a bail bondsman fee is usually what percentage of the set bail

asked by cc on January 13, 2014
69. ## Biology of the environment term

Teacher explained to us what limiting factor was but I'm not able to understand she said that a limiting factor causes increase in population but I not get how and why is called limiting factor than ? She also said how Phodphorus and nitrogen were limiting

70. ## physics

Thanks for the answer. I ask If one proton and one neutron are added to the nucleus of a nitrogen atom, which atom will the new nucleus look like? And you gave me the answer: The new atom would be oxygen, isotope 16. Could you please explain to me how.

asked by Anonymous on March 3, 2012
71. ## chemistry

a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 10^23 b. How many atoms of nitrogen are in the same amount of ammonia I know to find the number of atoms in a gram of a sample you must multiply by 6.02*10^23.

asked by kellie on September 20, 2010
72. ## Math

At the end of the course David averaged a 90% on Tests; 80% on Quizzes; 60% on Quick Checks; 90% on Discussions; 100% on Participation and 95% on Sample Work. What would be his final percentage to the nearest tenth and please show how you got your answer!

73. ## family law

A qualified __________ relations order can be issued by a court to require that the retirement benefits of one spouse, or a percentage thereof, be paid to the other. (Points: 5) domestic domicile community marital is it A

asked by Andy on December 10, 2011
74. ## Math 120

Scores on the GRE​ (Graduate Record​ Examination) are normally distributed with a mean of 528 and a standard deviation of 135. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score below 123.

asked by Jessica on April 14, 2017
75. ## Math

If the growth rate of a population is 1.5% how long will it take that country to double? 46 years. Use the above question to help answer this. In 2002 16.4 million babies were born what is the birthrate as a percentage and as per 1000 births? How do I

asked by Anonymous on September 28, 2017
76. ## maths

If the face value of a 91-day Treasury Bill is £100000 and it is issued at a discount of £1300, what is the annual interest rate (yield) that the purchaser receives (expressed as a percentage to 2 decimal places)?

asked by anchol on December 5, 2016
77. ## Calculus

The percentage of research articles in a prominent journal written by researchers in the United States can be modeled by A(t) = 25 + (36/1 + 0.6(0.7)^−t'), where t is time in years (t = 0 represents 1983). Numerically estimate lim as t→+infinity A(t).

asked by Kahi on October 13, 2016
78. ## statistics

Car seat belts are tested for strength, and it is found the results are normally distributed with a mean of 2400 lb and a standard deviation of 400 lb. Using the 68-95-99.7 rule, find the percentage of scores between 1600 lb and 3200 lb.

asked by Jean on August 5, 2017
79. ## Statistics

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.06; confidence level 90% ^p and ^q unknown n= (round up to the nearest integer)

asked by Rob on April 30, 2013
80. ## chemistry

The chloride at 0, 272g of a sample was precipitated by the addition of 50.00 ml of AgNO3 0.1030 M. The titration of excess silver, it has spent 8.65 ml of KSCN 0.1260 M. Express the outcome of this analysis Percentage of MgCl2

asked by Nora on October 13, 2017
81. ## Finance

Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 6 years ago. The bond currently sells for 87.5 percent of its face value. The book value of this debt issue is \$103 million. In addition, the company has a second debt issue, a zero coupon

asked by Sally on November 24, 2015
82. ## Chemistry Lab

Penicillin is an important antibiotic isolated from a type of mold. If you have 0.0468 g Penicillin, C14H20N2SO4MW = 31239 gmol , answer the following questions. A. How many moles of Penicillin do you have? B. What is the number of moles of nitrogen that

asked by Kim on January 12, 2011
83. ## Chemistry

im learning the general concepts of how atoms react etc... and i was struggling on the concept of diatomic molecules and how they work. For example, i understand how halogens would be diatomic, (through reacting with the other atom by sharing one

asked by sarah on May 19, 2010
84. ## Chemistry

Compound X contains only carbon, hydrogen, nitrogen, and chlorine. When 1.00 g of X is dissolved in water and allowed to react with excess silver nitrate, AgNO3, all the chlorine in X reacts and 1.95 g of solid AgCl is formed. When 1.00 g of X undergoes

asked by Sarah on January 7, 2016
85. ## chem

for a combination reaction, it was calculated that 7.59g of A would exactly react with 4.88g of B. these amounts were reacted, and 9.04g of product was isolated. what was the percentage yield of reaction??

asked by julia on November 11, 2010
86. ## math

The percentage of working mothers y can be modeled by the equation y=0.0102x + 0.644 where x is the number of years since 1990. In what year will 90% of mothers be in the labor force?

asked by Bob on January 28, 2010
87. ## math

what was the percentage increase in the age 75+ population of europe from 1970 (22,762) to 1995 (38,139) PercentIncreas= (38139-22762)/22762 *100

asked by Dee on May 26, 2007
88. ## programming

Grades are assigned on the standard 90, 80, 70, 60 scale. You are to write an algorithm which will receive a student name and a percentage grade and display the letter grade to be awarded

asked by Anonymous on September 26, 2013
89. ## chemistry

When 3.00 moles of sodium are reacted with large amounts of chlorine gas 145.8 g of sodium chloride are produced determine percentage yield

asked by Veronica on July 17, 2014
90. ## chemistry

in an experiment, 2.50g of salicylic acid is reacted with 10.31g of methanol. the yield of methyl salicylate, C8H8O3, is 1.27g. what is the percentage yield?

asked by robert on October 13, 2012
91. ## statistics

Suppose a college's SAT scores are normally distributed with mean 1000 and standard deviation 1 for students above 1200. What percentage of students is eligible for scholarships

asked by iroc on September 19, 2012
92. ## Math

Use the 68-95-99.7 rule to solve the problem. - The amount of Jen's monthly phone bill is normally distributed with a mean of \$53 and a standard deviation of \$11. What percentage of her phone bills are between \$20 and \$86?

asked by Deb on December 11, 2010
93. ## college chemistry

Express the concentration of a 0.0620M aqueous solution of fluoride, F-, in mass percentage and in parts per million. assume the density of the solution is 1.00g/mL.

asked by Linda on September 11, 2014
94. ## physics

A 7.5 kg object moving at 7.3 m/s collides inelastically with a 4.0 kg object which is initially at rest. What percentage of the initial kinetic energy of the system is lost during the collision?

asked by Nae on November 1, 2011
95. ## social studies

The Department of Health and Hospitals' portion of the 2005-2006 budget was \$6,577 million. What percentage of the total state budget did that represent?

asked by Amantha on September 24, 2010
96. ## math

What percentage interest rate is a loan that charges one hundred dollars in simple annual interest over 5 years on a one thousand dollar balance?

asked by Anon on August 1, 2012
97. ## stats

The incomes of trainees at a local mill are normally distributed with a mean of \$1100 and a standard deviation \$150. What percentage of trainees earn less than \$900 a month?

asked by J.T. on July 20, 2010
98. ## Bio

Given an allele frequency of o.91 for a hypothetical red allele (bead), the percentage of blue alleles residing in the heterozygotes would be? a) 89% b) 90% c) 91% d) 92% e)93% i don't even know how to approach this question

asked by kim on October 6, 2010
99. ## Chemistry

An organic compound on analysis gives the following percentage composition of elements present. Carbon 61.85%,hydrogen 10.50% and oxygen 27.65%.determine the empirical formula of the compound.(C=12,H=1,O=16)

asked by Angel on December 19, 2015
100. ## find the probability

the incomes of trainees at a local mill are normally distributed with a mean of \$1100 and a standard deviation of 150. what percentage of trainees earn less than \$900 a month?

asked by shasha on May 27, 2010