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

    asked by Adeola on June 13, 2010
  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
  28. Business 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 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

    asked by Please Answer NOW ! on July 9, 2014
  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.

    asked by Adam on September 4, 2015
  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%?

    asked by Muhammad on July 13, 2017
  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
  42. Business 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 Tee on June 28, 2013
  43. Business Finance

    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
  49. Business math

    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
  51. 8th grade math

    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

    asked by jade on May 13, 2018
  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?

    asked by Adriel on August 27, 2017
  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

    asked by Baffour Adofo Prince on November 12, 2013
  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

    asked by Mohammad on September 27, 2013
  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!

    asked by Please Help! on October 17, 2016
  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