i need the exat percentage of nitrogen in magnesium nitride

6,975 results, page 41
1. math

anis bought 809 dragon fruits at rm5 each. 5 of them are rotten.if she sold all the remaining dragon fruits at a price rm6 each,what her percentage profit?

asked by tyramichy on May 28, 2011
2. Chemistry

A .500g unknown sample is titrated with 40mL of .187M KMno4 by the following reaction: 5Fe{2+} + MnO4{-1} + 8H{+1} -> 5Fe{3+} + Mn{2+} + 4H2O. What is the percentage of iron in the following sample

asked by Julie on September 29, 2013
3. Physics

a) The x-coordinate of an electron is measured with an uncertainty of 0.20 mm. What is the xcomponent of the electron’s velocity, vx, if the minimum percentage uncertainty in a simultaneous measurement of vx is 1.0%. b) Repeat part (a) for a proton.

asked by B. Ramez on April 7, 2011
4. Biology

If there is crossing over between two gene loci A and C occurs in 20% of the tetrads and between C and B in 10% of an individual of genotype ACB/acb, what would be the percentage of gametes of double cross over types (AcB/aCb) ?

asked by Mini on March 5, 2018
5. Cultural Anthrolpogy

Anthropological research has demonstrated that supernatural beings and forces exist in what percentage of the world's cultures? A. 50 percent B. 80 percent C. 95 percent D. 100 percent My answer: C

asked by Anna on March 19, 2013
6. Elements of programming

prompt for and input a saleswoman's sale for the month(in cedi)and her commission rate. (as percentage). Output her commission for the month. Run it with flowchart using raptor

asked by Ibrahim on August 17, 2017
7. statistics

Suppose that IQ scores have a bell-shaped distribution with a mean of 95 95 and a standard deviation of 18 18 . Using the empirical rule, what percentage of IQ scores are at least 149 149 ? Please do not round your answer.

asked by dra on August 31, 2017
8. math

a baseball team has already played 37 games and won 21 games. The season has a total of 63 games. How many more games do they have to win to keepthe same winning percentage? (answer should be a whole number)

asked by dell on August 27, 2012
9. Math/dilution

A powder concentrate contains 2% w/w of active ingredient. What would be the percentage concentration (w/v) of the resultant solution after a 5-g packet of powder is dissolved in enough water to make 1 quart of solution?

asked by Anonymous on May 20, 2016
10. bio

The frequency of an allele ‘a’ in a natural population is 0.49. What percentage of the population is homozygous for this allele? Calculate the exact value; do not round up or give an estimate. Answer in units of %.

asked by Bianca on March 10, 2016
11. Math

Mahesh peaches 300 eggs at the rate of 18 should is per duzen he should her 150 eggs at a gain of 20% at what percentage should he sell remaining in order to a gain 30 % on his outlay.

asked by Ved Prakash on September 15, 2018
12. Chemistry

8.5g of sample of iron required just 75cm3 of 3.00M HCl to dissolve it and give a neutral solution.Calculate the percentage purity of the sample of iron.

asked by Kazembeous on November 16, 2014
13. Math

If someone earns \$960 interest over 4 year period on a \$6,000 investment, how do I solve this to find the percentage of interest per year. I know it is 4%, I just can't figure out how to show the math.

asked by Anonymous on October 15, 2009
14. percentage

There are two distinct natural numbers. Each is first increased by 10 then by same percentage as each was increased for the first time. Each number finally results in 72 Find the difference between the numbers.  Please explain easy way

asked by vipul on October 3, 2016
15. algebra

Supposed that an individual has a body fat percentage of 16.4% and weighs 188. How many pounds of his weight is made up of fat? Round to nearest tenth. 188÷16.4 11.46 11.5

asked by Malicha on January 21, 2017
16. math help me out please

There are two distinct natural numbers. Each is first increased by 10 then by same percentage as each was increased for the first time. Each number finally results in 72 Find the difference between the numbers. How to solve in easy way please help me

asked by vipul on August 14, 2016
17. percentage

There are two distinct natural numbers. Each is first increased by 10 then by same percentage as each was increased for the first time. Each number finally results in 72 Find the difference between the numbers Please explained in simplified way

asked by vipul on October 4, 2016
18. physics

Think of a projectile motion on an inclined table with the inclination angle α=6.The elevation angle is θ=30 and V0 is 40 cm/s. What is the percentage error (approximately) in hmax if the measured value of hmax is 5 cm? (sin6=0.1, g=10 m/s2)

asked by anonymous on December 21, 2012
19. Math

Todd's wieght went from 220 lbs to 190 lbs and Cassidy's wighte went from 150 lbs t?o 135 lbs. Who had the greater percentage of weight loss

asked by Andrea on February 17, 2010
20. Economics

Property taxes, which are calculated as a percentage of the value of a home, are an example of a. the benefits- received principle b. a regressive tax c. the ability to pay principle d. a proportional tax

asked by Mary on May 10, 2010
21. chemistry

treatment of a 0.400g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.733g of AgCl. calculate the percentage of KCl in the sample. show balanced equations in support of your answer

asked by Andrea on August 15, 2012
22. chemistry

The laboratory technician accidentally mixed NaHCO3 with BaCl2*2H2O instead of KCl when preparing unknown mixtures for this experiment. How would this mistake affect the calculated percentage of NaHCO3 in the mixture? Justify your answer with an

asked by Gary on October 13, 2011
23. Math

In 1995 the united states recovered 21% of its municiple solid waste through recycling up from 17% in 1990. Let y represent the percentage recycled and let x equal the number of years since 1990. Find the linear function that fits this data.

asked by Ann on March 10, 2012
24. Percent Composition

I figured out this percent composition problem and I got REALLY close answers, so I wanted to check in with someone to confirm if this is right. Which is the better ore for mining Aluminum: Either Al2(CO3)3 or AlPO4? For me the first one was the better

asked by Jenn on April 21, 2009
25. math

Cazz receives a semimonthly paycheck from a jazz club of \$4,500.00. He is married and is entitled to 1 withholding allowance. Using the percentage method, calculate the amount of income tax that should be withheld from his paycheck each pay period.

asked by smith on October 1, 2015
26. Chemistry

1.2048g sample of impure Na2CO3 is dissolved and allowed to react with a solution of CaCl2 resulting CaCO3 after precipitation, filtaration and drying was found to weight 1.0362g. calculate the percentage purity of Na2CO3

asked by Ana on February 15, 2015
27. Percent Composition

I figured out this percent composition problem and I got REALLY close answers, so I wanted to check in with someone to confirm if this is right. Which is the better ore for mining Aluminum: Either Al2(CO3)3 or AlPO4? For me the first one was the better

asked by Jenn on April 21, 2009
28. Chemistry+Empirical formula

This is kind of tricky for me. What os the empirical formula (lowest whole number ratio) of the compounds below? A. 25.3% Cu, 12.9% S, 25.7% O, 36.1% water How would i set this up? The water at the end is confusing me. I think I need to find the percentage

asked by Chopsticks on January 16, 2009
29. math

The population mean length of a hospital stay for surgery is 5.5 days and the standard deviation is 1.9 days. What percentage of patients are hospitalized for 3.9 days or less? I've read the book and looked at the explanation that it gives and it's not

asked by tmouery on March 28, 2013
30. Chemistry

(a) The total mass of carbon contained in fossil fuels that was burned in the world from 1750 to 2000 was estimated to be 2.9 x E14 kg C. The amound of carbon released as carbon dioxide from agricultural expansion and deforestation over this period is

asked by Anonymous on April 13, 2010
31. math

The base of a parallelogram is 6 times its height if the base is cut in half,the new area is what percentage of the original area?

asked by kyra on August 18, 2011
32. Statistics

my z score for a rats liver glycogen percentage is -0.62 and the average population is 3.32. How can I analyze my z score? what does it mean relative to the population

asked by shiva on October 30, 2017
33. Statistics

The percentage of adults who have been told at some point that they have hyptertension is 23.53%. If 10 adults are randomly selected, what is the probability that at least 8 have been told that they have hypertension?

asked by Raj on October 10, 2008
34. Math

A shop owner increased the selling price of a shirt from \$20.00 to \$26.00. By what percentage was the price increased? I got the answer of 30 percent.

asked by Carol Kelly on May 23, 2016
35. math

The base of a parallelogram is 6 times its height if the base is cut in half,the new area is what percentage of the original area?

asked by kyra on August 18, 2011
36. statistics

The test scores of students in a class test have a mean of 65 and with a standard deviation of 8. What is the probable percentage of students scored more than 70?

asked by lisa on February 10, 2014
37. chemistry

when 5g of impure sample of CH4 is completely combusted, 9g of H2O was produced.what is the percentage purity of the sample of CH4

asked by john on March 11, 2015
38. stati

12. Suppose 80% of students finish high school. Of them, 50% finish college. Of them, 20% get a master’s degree. Of them, 30% get a Ph.D. (i) What percentage of students get a Ph.

asked by dean on November 24, 2011
39. math

There are 1500 poultry on a farm. 40% are chickens, 2/3 of the ramainder are ducks and the rest are geese. What percentage of the poultry are geese?

asked by Saba on April 10, 2016
40. science

If a blue eyed mother, bb, and a blue-eyed father, bb, had children, what percentage of their offspring would have brown eyes?

asked by Anonymous on August 22, 2010
41. Math

I have the fraction 1/6. I need to express it as a decimal, fraction expressed with denominator 100 and percentage. Is it correct to have 0.16666; 16.66/100 and 16.66%?

asked by anna on November 13, 2012
42. college

Construct a frequency distribution table for the following scores. Include columns for proportion and percentage in the table. Scores: 5, 7, 8, 4, 7, 9, 6, 6, 5, 3 9, 6, 4, 7, 7, 8, 6, 7, 8, 5

asked by Kelly on August 19, 2010
43. Chemistry

If 16.9 g of CO2 was produced from the thermal decomposition of 41.83 g of CaCO3, what is the percentage yield of the reaction? CaCO3(s) > CaO(s) + CO2(g)

asked by Lee on February 8, 2013
44. math

If there are 300 students majoring in History and 150 majoring in English what is the percentage of that? How do you turn students to percents?

asked by Rmz on January 11, 2010
45. ALGEBRA

if a product that had a cost of rm2000 was sold with a markup percentage of 80% based on retail price, what was the retail price?

asked by ann on January 3, 2015
46. physics

a ball dropped on to a floor .if the coefficient of restitution is 0.5.the percentage loss of energy of the ball on rebounding from the floor is?

asked by srikala on April 12, 2012
47. chemistry

two-thirds of the atoms that make up H2S are hydrogen. What percentage of the weight of hydrogen sulfide is the weight of the two hydrogens?

asked by Anonymous on September 30, 2010
48. math

the length of each edge of a cube is of length 3m. the edges are increased by 20%. Calculate the percentage increase in the volume of the cube.

asked by Smith on April 7, 2017
49. Maths

Determine the effective annual yield (annual percentage yield) for \$1 invested for 1 year at 8.5% compounded monthly.

asked by randy on March 19, 2008
50. math

What is the percentage of 7/8ths? What is the decimal of 7/8ths?

asked by linda on March 1, 2011
51. Math

If you have a \$46.75 Markup on a product , What would the percentage of this markup be?

asked by Denyse on October 31, 2012
52. MATH

WHAT PERCENTAGE OF 186,000.00 IS 30,000.00?

asked by MARY on April 19, 2010
53. Math

What is 503,000,000 as a percentage?

asked by Katrina on November 18, 2015
54. maths

Given that G=ab, find the percentage increase in G when both a and b increase by 10%.

asked by arzam on November 9, 2013
55. maths

Given that T=kx/y , find the percentage increase in T when k, x and y all increase by 20%.

asked by arzam on November 9, 2013
56. Math

If 30=100%, and going over my subtracts from 100%. What is my percentage if I get 39?

asked by Bethany on October 7, 2010
57. Chemistry

To a beaker containing 200 mL of a solution of CuSO4 was added 10.0g of magnesium metal. When the reaction was complete, a mixture of Mg and Cu having a mass of 14.50g remained in the beaker. Calculate the molarity of the original CuSO4 solution. I

asked by Kay on February 17, 2012
58. much needed help...

The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

asked by jason on October 22, 2014
59. physics

The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

asked by Jason on October 21, 2014
60. physics Damon???

The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

asked by maranda on October 22, 2014
61. physics

The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

asked by Jason on October 21, 2014
62. math - marginal analyis

A factory's output is Q=600K^1/2L^1/3 units, (read 600 x K to the 1/2 power x L to the 1/3 power). K denotes capital investment and L denotes the size of the labor force. Estimate the percentage increase in output that will result in a 2% increase in the

asked by becky on August 14, 2006
63. chemistry

Calculate the theoretical percentage of water in gypsum, rounded to the nearest whole number %. (calcium sulfate dihydrate; CaSO4 ° 2H2O; Ca = 40 g/mol, S= 32 g/mol; O= 16 g/mol; H= 1 g/mol).

asked by tina on February 7, 2013
64. statistics

1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below 20?

asked by Mich on September 28, 2011
65. Chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.80 g of CO2(g) is produced. What is the mass percentage of the table salt in the mixture?

asked by Harley on October 23, 2011
66. Physics

two cars of equal mass with equal speeds traveling perpendicular to one another collide completely in elastically. what percentage of the cars' total energy is lost in the collision?

asked by ritzi on February 25, 2014
67. math

kate davidson signed a simple discount note for \$9000. the discount rate is 5%, and the term of the note is 18 months. what is the annual percentage yield (apy)?

asked by Anonymous on September 17, 2014
68. percentage

Choon yong was asked to paint a wall of area 84 meter square.In one hour,he had painted 21meter square. a)what percentage of the wall was left unpainted?

asked by Da S on February 12, 2012
69. Math

Jacob mixes the letters J,K,L,J,K,M,N and P throughly. Without looking Terry draws one letter. Expressed as a fraction, decimal and percentage what is the probability the K will NOT be the letter terry selects A. 1/4,0.25,25% B.3/4,0.75,75% C. 4/3,1.33%,

asked by Tyler on May 18, 2016
70. Maths

A shopkeeper bought 160 eggs for 320 naira 40 eggs were cracked he sold the remaining for 480 naira find her profit or loss percentage. ︶︿︶

asked by Risen Okoro on April 24, 2018
71. contemporary math

Intelligence quotients on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Use the 68-95-99.7 rule to find the percentage of people with the following IQs: a.) between 84 and 100 b.) below 52

asked by Alicia on June 24, 2008
72. chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 4.00-g sample is burned, and 3.30 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by Anonymous on October 17, 2014
73. Chemistry

What is the minimum percentage of gas (C2H2) formed when 2.66g of calcium carbide (CaC2) reacts completely with 50g water? CaC2+2H2O -> C2H2+ Ca(OH)2

asked by Lany on January 19, 2016
74. chem

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 3.10 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by tata72 on September 29, 2013
75. math

Kate Davidson signed a simple discount note for \$9,000. The discount rate is 5%, and the term of the note is 18 months. What is the annual percentage yield (APY)?

asked by Angie on May 6, 2016
76. chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.00-g sample is burned, and 2.50 g of CO2(g) is produced. What is the mass percentage of the table salt in the mixture

asked by Sete Odhiambo on October 24, 2011

what is nominal value,face value, market alue,rate of dividend,annual dividend,rate of income, percentage yield, Demat, bullish, bearish. can someone answer this.

asked by amy on June 3, 2008
78. math

Suppose the scores of students on an exam are normally distributed with a mean of 393 and a standard deviation of 57. According to the empirical rule, what percentage of students scored between 279 and 507 on the exam

asked by betsy on October 4, 2016
79. chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 4.00-g sample is burned, and 3.30 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by Jessica on September 22, 2013
80. statistics

You have a score on a national entrance exam of 95. What percentage of people in the population have a score that is lower than yours? (Assume the population mean is 75 and the standard deviation is 10. Use the table I passed out in class.)

asked by Anonymous on February 26, 2014
81. chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by ian on October 8, 2013
82. chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by ian on October 8, 2013
83. statistics

A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores 1) Below 20 2) Above 40 3) Above 20

84. chemistry

3CuCl2-2H2O + 2AL--> 3Cu +2AlCl3+6H2O what is the thepretical yield or copper? then what is the limiting reagent and excess reagent? whats the percentage yield?

asked by Brianna on November 26, 2010
85. Chemistry

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 4.00-g sample is burned, and 2.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

asked by Sarah on March 31, 2015
86. Chemistry

A sample of nitrogen containing 1.5x10^23 molecules has the same number of molecules as a sample containing A. 1.0 mole of H2 B. 2.0 moles of He C. 0.25 mole of O2 D. 0.50 mole of Ne

asked by Brandi on March 13, 2013
87. Chemistry

A sample of nitrogen containing 1.5x10^23 molecules has the same number of molecules as a sample containing A. 1.0 mole of H2 B. 2.0 moles of He C. 0.25 mole of O2 D. 0.50 mole of Ne

asked by Brandi on March 13, 2013
88. Chemistry check and help

so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a

asked by Sam on February 17, 2014
89. chem

(CH3)N2H2(l) + 2N204(g) = 3N2(g) + 4H2O(l) + 2CO2(g). consider the reaction b2n 150g of liquid (CH3)N2H2 & 80L of N2O4 at 27 degree celcius & a pressure of 2 atm. The gases produced are collected at 27 degree celsius in an evacuated 250L. Calculate: a)

asked by alia on September 8, 2011
90. Chemistry --really need help!

I am really struggling with these problems!! A reaction mixture that consisted of 0.20 mol N2 and 0.20 mol H2 was introduced into a 25.0 L reactor and heated. At equilibrium, 5.0% of the nitrogen gas has reacted. What is the value of the equilibrium

asked by Angelica on February 20, 2010
91. Finance

4.A thirty year US treasury bond has a 4.0 percent interest rate.In contrast, a ten year Treasury bond has an interest rate of 2.5 percent. A maturity risk premium is estimated to be 0.2 percentage points for the longer maturity bond. Investors expect

asked by Janaki on May 6, 2013
92. Chemistry.

I need to know if these two statements are always true, AT; sometimes true, ST; or never true, NT. Thanks! 10. A mole of carbon atoms has a mass approximately three times as great as the mass of a mole of helium atoms. 11. The gram molecular mass of

asked by _ _ _ _ _ _. on March 20, 2009
93. Chemistry

10.0 mol of ammonia gas is injected into a 4.0 L container. At equilibrium 1.2 mol of nitrogen gas is found in the container. The number of moles of ammonia gas left in the container must be which of the following? N2(g) + 3H2(g) 2NH3(g) + 94 kJ a. 8.8 d.

asked by Alicia on June 8, 2010
94. math

The United States emitted 19.5 million t of nitrogen oxides (No) into the atmosphere in 1987. One metric to (1t) equals 1,000 kg. How many kilograms of NO were emitted to the atmosphere in the United States during 1987?

asked by shauna on October 8, 2009
95. college general chem

If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? What is the oxidation state of an individual sulfur atom in ? What is the oxidation state of an individual nitrogen atom in ?

asked by ronie on October 3, 2011
96. SUPER URGENT-- CHEMISTRY

1. .0025 M tartric acid completely reacts with .0030 m of al bicarbonate if .913 l of co2 forms at 298 k with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molec of .0035 m hydriodic acid reacts with 25 g of magnesium bicarbonate how much carbon

asked by Danny on May 21, 2012
97. Environmental Science

#34. In two or three well-developed paragraphs, name and describe the five primary air pollutants and provide several sources of each. my answer: There are five primary air pollutants and some sources of each of them. The first pollutant is Carbon monoxide

asked by y912f on February 23, 2010
98. Environmental Science

#34. In two or three well-developed paragraphs, name and describe the five primary air pollutants and provide several sources of each. my answer: There are five primary air pollutants and some sources of each of them. The first pollutant is Carbon monoxide

asked by y912f on February 23, 2010
99. Chemistry 2

The mechanism for the reaction of nitrogen dioxide with carbon monoxide to form nitric oxide and carbon dioxide is thought to be the following. NO2 + NO2 NO3 + NO Slow NO3 + CO NO2 + CO2 Fast What would be the overall balanced equation to this reaction?

asked by Alanna on October 21, 2016
100. Physical Science

The density of sea water is slightly higher than that of fresh water. The higher density is due to the fact that sea water contains salts such as sodium choride and magnesium chloride. Suppose you have a container that holds 5.00 kg of freshwater, which

asked by Spazzo on August 24, 2010