# i need the exat percentage of nitrogen in magnesium nitride

6,975 results, page 42
1. ## Physics

the top sprinter in the world can reach a terminal speed of 50km/h, in 20m. Assuming the acceleration to be constant, compute the acceleration such an individual experiences, and compare it (in percentage form) to the acceleration of gravity.

asked by Haylee on December 14, 2015
2. ## Chem

The actual heat of formation of MgO is -601.8 kJ/mol. Convert this to kcal/mol and calculate your % error. And list two possible sources of procedural error to account for this percentage.

asked by Danny on March 19, 2012
3. ## chemistry

a solution of an unknown metal chloride (0.08870 g ) was treated with silver nitrate to yield AgCl ( 1.9132 g ). calculate the percentage by mass of chlorine in the unknown chloride

asked by TROUBLED on October 18, 2011
4. ## Math

Find the odds. A basketball player with a free throw shooting percentage of 60% gets fouled and goes to the line to shoot free throws. What are the odds in favor of her making her first shot?

asked by Rena on January 6, 2011
5. ## Chemistry 22

Table salt NaCl and sugar C12H22O11 are accidentally mixed. A 6.00 g sample is burned and 2.90 g of CO2 is produced. What was the mass percentage of the table salt mixture? Could you please show me all the way through if you can?

asked by Chelsea on October 5, 2013
6. ## Personal Finance

Suppose you buy a two-year CD for \$10,000 from First Command Bank. The interest earned at maturity is \$______. Use the APY (Annual Percentage Yield) from Table 4.1. The Table says APY for this is 3.9%

asked by Kinsey on June 20, 2016

1.to measure how much the cost of some variable changes over time, you would use? 2.if an index number calculation over 8 years with a base value of 100 gave an index for 1993 of 110, what would be the percentage relative for 1993?

asked by mirjee on January 24, 2010
8. ## calculus

Can anyone walk me through the steps of solving either of these problems? 1)Determine the percentage of change of f(x)=e^0.9x at x=15 and x=30 2)For the demand function q=150(245-p^2), find E(p) and determine if the demand is elastic or inelastic (or

asked by Sally on April 10, 2008
9. ## chemistry

a solution of an unknown metal chloride (0.08870 g ) was treated with silver nitrate to yield AgCl ( 1.9132 g ). calculate the percentage by mass of chlorine in the unknown chloride

asked by TROUBLED on October 18, 2011
10. ## Chemistry

A 5g mn sample was dissolved in 100ml water. If the percentage of M (At wt =55g/mol) in the sample is about 5%. What volume is needed to prepare 100ml of approximately 3.0 x 10-3 M solution Who helps for me. The right answer 6.7ml

asked by Fai on November 5, 2012
11. ## Physics

An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266 and 115°C. It absorbs 4250 cal per cycle at 266°C. What is its efficiency as a percentage

asked by Chelsea on January 31, 2014
12. ## Physics

An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266 and 115°C. It absorbs 4250 cal per cycle at 266°C. What is its efficiency as a percentage?

asked by Riley on February 3, 2014
13. ## Chemistry

In my problem i need to find the mass of Ag in AgNO3. I have 3.489g of AgNO3. Help please! Determine the percentage composition from the formula. PercentAg= atomicmassAg/molmassAgNO3 Then, mass Ag= 3.489 * decimal percent above.

asked by Jason on January 29, 2007
14. ## statistics

Identify the type I error and the type II error that is a hypothesis. The percentage of households with more than 1 pet is equal to 65%

asked by Sharday on August 4, 2013
15. ## Algebra (re: %)

Sally took a test with 70 questions and she correctly answered 60 question. What percentage of the questions did she answer correctly?

asked by Nini on May 21, 2012
16. ## math

Emily has a book with 200 pages , she read 150 pages , what's the percentage of books she read?

asked by kate on November 10, 2017
17. ## math

Chris eats 3 slices of a pizza that is cut into 8 equal slices. What percentage of the pizza does he eat?

asked by jackie on March 1, 2011
18. ## Math

In a school, 33% of the students study Biology and 16% study Chemistry. If 9% study both sciences, what percentage do not study either subject?

asked by Zip on November 28, 2018
19. ## Science

If 15% of the radioactive material decays in 5 days, what would be the percentage of amount of original material left after 25 days?

asked by Anonymous on June 4, 2015
20. ## math

Top player's scoring average changes from 20 points per game to 24 points per game. What is the percentage of increase. 1:20% 2:16.7% I think 2??

asked by reality check on November 4, 2015
21. ## Math

A frame around a photo is 5 cm wide. The photograph is 20 cm long and 10 cm wide. What percentage of the entire area is the frame.

asked by Sally on June 4, 2014
22. ## Math

A bag is full of marbles. 10 blue, 11 red, 3 green, 16 yellow. What percentage of marbles are yellow

asked by Caleb on December 16, 2016
23. ## Astronomy

What percentage of the energy budget do electrons occupy? Take the energy budget occupied by matter to be 4.4%. (a) 3.9% (b) 0.1% (c) 0.03% (d) 0.002%

asked by qwerty on October 1, 2013
24. ## math

If the denominator of a fraction decreases by 20 percent, and the numerator increases by 20 percent, by what percentage does the value of the fraction change?

asked by sukh on February 4, 2017

A sheet of plastic stops 25% of the light and lets through the residual 75%. What percentage of the light is let through by two sheets of the plastic ?

asked by May on August 17, 2015
26. ## hellppp

an assortment of coins contains 20 pennies, 2 nickels and 6 dimes. what percentage of the coins are nickels? show how is solved ?????????

asked by Anonymous on September 14, 2011
27. ## Florida Science Grade 8

Saturn's atmosphere consists of 75.3% hydrogen and 24.25% helium.what percentage of Saturn's atmosphere is made up of other gases?

asked by Desmond Reid on January 12, 2011
28. ## Chemistry

Nitrogen Oxides, NOx (mixture of NO and NO2). The NOx in the atmosphere is slowly broken down to N2 and O2 in a first-order reaction. The average half-life of NOx in the smokestack emissions in a large city during daylight is 3.9 hours. (a) Starting with

asked by Robert on June 28, 2012
29. ## Chemistry

Virtually all the nitric acid manufactured commercially is obtained by the ammonia oxidization process. This involves this first step: Ammonia gas combines with oxygen to form nitrogen monoxide and water vapour. a) Write a balanced equation for the

asked by Kayla on January 21, 2015
30. ## Physics help?

Nitrogen gas molecules, which have mass 4.65×10−26 kg, are striking a vertical container wall at a horizontal velocity of positive 440 m/s. 5.00×1021 molecules strike the wall each second. Assume the collisions are perfectly elastic, so each particle

asked by Megan on June 2, 2012
31. ## chemistry

which metal react most vigorously? metals aluminum, copper, magnesium, lead, tin, zinc 1. which metal will react most quickly? 2. which will take the longest time to react? 3. which will react most vigorously and least vigorously? 4. list metals from order

asked by rick on April 18, 2013
32. ## Ecnomics

Wilpen Company, a price-setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U.S. demand for its tennis balls by using the following linear specifications: Q= a + bP + cM + dPr Where Q is the

asked by Christopher on July 3, 2009
33. ## Manageral Economics (Economyst Only Please)

Wilpen Company, a price-setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U.S. demand for its tennis balls by using the following linear specifications: Q= a + bP + cM + dPr Where Q is the

asked by John Q on July 4, 2009
34. ## chemistry

A 1.252g sample containing iron dissolved and converted to Fe followed by ADDITION OF 25ML OF 0..01m K2CR2 07. THE EXCESS K2CR207 REQUIRED 6.85ML OF 0.015m SN2+. Find the percentage fe3 04 fw 213g/mol in the sample. Who helps me

asked by Fai on December 12, 2012
35. ## math

A chartered bank is raising the interest rate on its Visa credit card from 9% to 11%. What will be the percent increase in the interest charges on a given balance? Note: Please make sure your final answer(s) are in percentage form and are accurate to 1

asked by suvi on February 14, 2010
36. ## Chem

A 7.50g sample of aluminum is placed in 250.0 mL of 1.80 mol/L sulfuric acid. The reaction is not nearly as vigorous as expected and produces only 427 mL of gas at 27 degrees celsius and 480 kPa pressure. Calculate the percentage Yield of the reaction

asked by Tuan on February 15, 2016
37. ## Chemistry

Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C? Please Give as much detail as possible instructor will not help

asked by Devin Boutte on November 19, 2011
38. ## chemistry

A student dissolves a .726 g aspirin tablet in water and titrates the solution with .272 M NaOH are required to reach the equivalence point. Calculate the percentage of acetylsaliclic acid in the tablet. I am not really sure where to start with this. I

asked by Aaron on February 28, 2017
39. ## P-Chemistry

A closed vessel of volume 2.50 dm3 contains 100g of nitrogen (N2) and 100g of carbon dioxide (CO2) at 25 C. What are the partial pressures and mole fractions of each gas? Can you check my answers.Thank you. I got Partial Pressure for N2=34.95 atm CO2=22.24

asked by Jessy on September 5, 2016
40. ## math

Reading readiness of preschoolers from an impoverished neighborhood (n=20) was measured using a standardized test. Nationally, the mean on this test for preschoolers is 30.9 with SD=2.08. A) Children below the 30th percentile (in the bottom 30%) are in

asked by Sasha on April 12, 2012
41. ## science

the question says assume the valencies of hydrogen, nitrogen and carbon in the compounds are 1, 3 and 4 from this i must draw a structural formulae for hydrogen cyanide and cyanogen that are consistant with these valencies. please help H : C::: N: Does

asked by Mark jones on February 27, 2007
42. ## Chemistry

Nitrogen can also be produced from sodium metal and potassium nitrate by the reaction: Na(s) +KNO3 (s) --> K2O(s) +Na2O(s) + N2(g) If we generate oxygen by the thermal decomposition of potassium chlorate: 2KClO3(s) --> 2KCl(s) +3O2(g) How many grams of

asked by Ka_Chin on November 8, 2015
43. ## Chemistry- Dr.Bob!

1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those

asked by Sanaya on January 20, 2016
44. ## chemistry

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent ‘the bends’, a condition caused by nitrogen bubbles forming in the bloodstream. If 95 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with a volume of 8.0

asked by alex on March 20, 2013
45. ## Chemistry

Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2

asked by Jenna on October 21, 2011
46. ## science/ chemistry

Ethane (C2H6) is one of the many products of combustion of iso-octane, an important component of petrol. After release into the atmosphere, it is attacked by the hydroxyl radical, HO•, leading to its oxidation in the cycle of reactions when in a NOx-rich

asked by Nicolas on September 14, 2008
47. ## Economics

Suppose that 20 workers were required in 2010 to produce 120,000 bushels of wheat on a 1,000-acre farm. a. What is the average output per acre? (?) bushels per acre What is the average output per worker? (?) bushels per worker b. If in 2020 only 16 workers

asked by Jin on August 20, 2015
48. ## thermo

equal masses of ice at 0 oC, water aat 50 oC and steam at 100 oC are mixed and allowed to reach equilibrium. what will be the final temp of the mixture? and what percentage is the water and what percent will be steam??

asked by holly on November 5, 2010
49. ## Chemistry

Table salt, NaCl, and sugar C12H22O11 are accidentally mixed. A 5.50g sample is burned and 3.60g of CO2 is produced. What was the mass percentage of the table salt mixture?

asked by Andrew on September 24, 2013
50. ## Chemistry

Express the concentration of a 0.0510 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the desnity of the solution is 1.00 g/mL Since, we're assuming the density I think that also means were assuming the volume.. but

asked by Joy on February 20, 2012
51. ## Maths'

What percentagge of £119.25p is £11.04p? Divide: 11.04 by 119.25. This gives you a decimal number. Move the decimal point two places to the right to turn it into a percentage. Please post your answer and we'll be glad to check it.

asked by wattie on August 8, 2006
52. ## MATH

Mabel has \$35,000 to invest in a certificate of deposit for 4 years. The certificate of deposit earns interest at 4.75% compounded daily. What is the annual percentage yield to the nearest thousandth of a percent?

asked by Beth on February 13, 2016
53. ## Math Question

Mr. hernandez had to interview a total of 63 households in his assignment. H has already finished 28. what percentage of the households in his assignments has he finished? (round your answer to the nearest tenth of a percent.) .... your aunt is building a

asked by Anonymous on December 29, 2009
54. ## Chemistry

A solution contains 40.0 g of sodium chloride and 200.0 g of water. Calculate the NaCl concentration as a a) mass percentage, b) molality, c) mole fraction. I have trouble finding mole fraction. I believe I've got the other two, but I'm not 100% sure.

asked by Mike on May 25, 2013
55. ## thermo

equal masses of ice at 0 oC, water aat 50 oC and steam at 100 oC are mixed and allowed to reach equilibrium. what will be the final temp of the mixture? and what percentage is the water and what percent will be steam??

asked by holly on November 5, 2010
56. ## math

The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. The percentage of a runners that will run the mile in less than 4 minutes is %.

asked by rick on July 31, 2012
57. ## Math problem solving

An octagonal stop sign can be cut from a square sheet of metal, 750mm on a side. To the nearest hundredth, what percentage of the metal square is wasted when the octagon is of maximum size ?

asked by Connor.M on January 5, 2015
58. ## maths

A rectangular box with given dimensions length=80m, width=64m and height=48m. Has its two largest sides painted green. what percentage of the total area is painted green?

asked by Claudia on May 31, 2016
59. ## science

If a radioactive isotope has a half life of 10 years and you start with 100 grams what is the fraction left, percentage left, and amount of original in grams I would like for you to explain how to do it not tell me the answer that's the question

asked by keona on May 5, 2016
60. ## chemistry

Calculate the resulting pressure if 4.50 liters of nitrogen at 35 degrees Celsius and 790 torr and 3.7 liters of oxygen at 15 degrees Celsius and 750 torr are pumped into a 1.00 liters container at 25 degrees celsius. Assume ideal gas behavior.

asked by carolann on March 24, 2014
61. ## Stats -Math

1. We are interested in conducting a study in order to determine what percentage of voters of a state would vote for the incumbent governor. What is the minimum size sample needed to estimate the population proportion with a margin of error of 0.05 or less

asked by Lauren on December 13, 2016
62. ## Chemistry

Nitrogen dioxide, a pollutant in the atmosphere, can combine with water to from nitric acid. One of the possible reactions is shown below. Calculate ∆G0 and Kp for this reaction at 25oC and comment of on the spontaneity of the reaction (MUST plot the

asked by Yasemine on April 18, 2013
63. ## Chemsitry

Nitrogen dioxide, a pollutant in the atmosphere, can combine with water to from nitric acid. One of the possible reactions is shown below. Calculate ∆G0 and Kp for this reaction at 25oC and comment of on the spontaneity of the reaction (MUST plot the

asked by Yasemine on April 19, 2013
64. ## chemistry

Air consits of 21% oxygen, 78% nitrogen and 1% argon by volume. Calculate the partial pressures in Pa if total pressure is 1 atm. My teacher just converted 1atm in pa and then did 21% of that for oxygen etc etc. Can you explain why she did this, is volume

asked by sam on August 11, 2011
65. ## math (pre-calc)

Analyzing a Stock. The beta, B of a stock represents the relative risk of a stock compared with a market basket of stocks, such as Standard and poor's 500 Index of stocks. Beta is computed by finding the slope of the line of best fit between the rate of

asked by Rony on March 31, 2010
66. ## stats

A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are

asked by dan on January 24, 2012

Nitrogen gas molecules, which have mass 4.65×10−26 kg, are striking a vertical container wall at a horizontal velocity of positive 440 m/s. 5.00×1021 molecules strike the wall each second. Assume the collisions are perfectly elastic, so each particle

asked by Christina on June 3, 2012
68. ## Chemistry

I'm trying to find if potassium nitrate is polar or non-polar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.44-3.04 =0.82-0.4 =0.4 =0.42 So the final answer is 0.42 and by

asked by Marty on November 10, 2007
69. ## chem

a sealed cylinder of a gas contains nitrogen gas at 1.00*10^3 kPa pressure and a temperature of 20C. They cylinder is left in the sun and the temperature of the gas increases to 50C. What is the new pressure in the cylinder?

asked by Skye on January 24, 2012
70. ## chemistry

Can someone help me with this? 1)What new element is formed if magnesium-24 is bombarded with a neutron and then ejects a proton? Write a balanced nuclear equestion for this transmutation. Is this beta decay? That's what I'm thinking, but I'm not sure. It

asked by Alexander on December 19, 2006
71. ## Physics

Please, help me with this problem... im a bit confused abt solving it.. In a tank of volume V=7.5 L, temperature T=300 K, there is a mix gases: n1=0.1 mole of oxygen, n2=0.2 mole of nitrogen, n3=0.3 mole of carbon dioxide. Considering the gases ideal,

asked by Gyuzal on February 21, 2011
72. ## Geometry

What units in the metic system would you use to measure each of the following quanities? a. distance from los angeles to new york b your waist measurement c. width of a hat d. your height The united States emitted 19.5 million t of nitrogen oxides (NO)into

asked by Sherri on March 6, 2008
73. ## Maths

In a class of 60 students,45 students are female. What percentage (%) of the students are male.

asked by Tuns on December 5, 2016
74. ## Chemistry pH

A 0.60 M solution of a weak acid, HA, has a pH of 3.72. What is the percentage ionization of the acid? What is the value of Ka for the acid?

asked by Penny on April 17, 2014
75. ## Chemistry

A 0.60 M solution of a weak acid, HA, has a pH of 3.72. What is the percentage ionization of the acid? What is the value of Ka for the acid?

asked by Anonymous on April 17, 2014
76. ## general chem

Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper (II) nitrate; (b) a solution of zinc nitrate is added to a

asked by rob on October 9, 2011
77. ## Is My Pseudocode Correct? - Programming

I am supposed to make a pseudocode for a fat gram calculator. These are the instructions: Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: - Make sure the number of fat grams and calories

asked by Bryson on October 15, 2014
78. ## Physics

Explain Why the pressure of a gas in a nitrogen container falls continuously when the gas is continuously taken away while the pressure of a gas in a chlorine container remains constant until nearly all the gas is withdrawn

asked by Joel on August 11, 2016
79. ## statistics

Heights of men on a baseball team have a bell-shaped distribution with a mean of 169 cm and a standard deviation of 9 cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. 151 cm and 187 cm. b. 160 cm

asked by slomomo on February 26, 2015
80. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

asked by Marrion on October 10, 2009
81. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

asked by Marrion on October 10, 2009
82. ## chem

Three of the primary components of air are carbon dioxide, nitrogen, and oxygen. In a sample containing a mixture of only these gases at exactly one atmosphere pressure, the partial pressures of carbon dioxide and ni- trogen are given as PCO2 = 0.285 torr

asked by a on May 31, 2014
83. ## waste water treatment

Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts

asked by Nilu on November 25, 2013
84. ## Principles of Finance

.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 Sandy on November 13, 2013
85. ## Honors Chemistry

1. .0025 M tartaric acid completely reacts with .0030 M of Al bicarbonate if .913 l of CO2 forms at 298 Kelvin with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molecules of .0035 M hydriodic acid reacts with 25 grams of magnesium bicarbonate how

asked by Bill on May 21, 2012
86. ## pharmacy calculation

A suspension contains 2400 mg of active drug in 1000 ml waht is the percentage of drug in the final product? what is the answer? Total mass is 1000g + 2.400g. Percent by mass (m/m)= 2.4 /1002 * 100

asked by sheila on October 23, 2006
87. ## Maths

£2000 is invested at x% interest over three years. At the end of three years the money has grown to £2963. To the nearest percentage find the rate of interest. If you could help me out I would greatly appreciate it. I've tried to figure it out numerous

asked by Steph on February 3, 2014
88. ## Chemistry

I don't understand where to start first. Can you break it down for me? Ascorbic acid, also known as vitamin C, has a percentage composition of 40.9% C, 4.58% H, and 54.5% O. The molar mass of ascorbic acid is 176.1 g/mol. Determine the empirical and

asked by GABS on January 20, 2016
89. ## percentage

Sharil is cycling from his house to Jeju Island,which are 15km apart.If Sharil has cycled a distance of 9.5km,what percentage of the total distance does he have left? pls round off ur answer to 1 decimal place

asked by Da S on February 13, 2012
90. ## math

Jerry mixes the letters F,P,M,M,M,F and j thoroughly.without looking. Amanda draws one letter expresses as a fraction, decimal, and percentage, what is the probability that j will not be the letter Amanda selects. 7/8 0.875, 87.5%

asked by couch potato on April 23, 2018
91. ## statistics

The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. Find the percentage of a runners that will run the mile in less than 4 minutes?

asked by dw on March 6, 2012
92. ## math plz help !!!

plz help me I'm desperate!!! Jerry mixes the letters F,P,M,M,M,F,P and J thorough. Without looking Amanda draws one letter. Expressed as a fraction, decimal and percentage. What is the probability that J will NOT be the letter Amanda selects? A.7/8, 0.875,

asked by cassie needs help on February 17, 2016
93. ## math

there are 2000 students in a course. thet wrote a mathematics test which was scored out of 40 and then converted to percentage. draw a flowchart that reads the name,sex and score of each student and output the name of the female students that scored below

asked by dorofina on May 26, 2017
94. ## research in CriminalJustice

The five year survival rate for Caucasians for all forms of cancer increased from 39% in the 1960's to 57% now. Express the change in two ways: (1) as an absolute difference in terms of percentage and (2) as a relative difference in terms of percent.

asked by Anonymous on March 20, 2012
95. ## chemistry

i'm having a hard time for my chemistry project an my topic on titration and my topic is to determine the mass percentage of iron in steel wool and i can not get as much information on the steps to follows how to create the titration and equipment needed

asked by piah on May 17, 2010
96. ## Economics

The assessed value of Patty's residential property was \$200,000 in 2004. In 2006, the assessed value increased to \$225,000. The property tax rate in both years was 1.2 percent. Patty earned \$60,000 each year. Determine Patty’s property taxes for 2004 by

asked by Kesha on March 16, 2015

write the formulas for the following compounds Sodium chlorate i put NaCl Lead (II) phosphate i put Pb2P For Magnesium hydrogen carbonate i had no clue! then it stats state the number of electrons lost or gained in forming each of these Ions. I didn't

asked by John on March 9, 2008
98. ## math

if out of two numbers, one number is increased by 10% and other number by 20%,find percentage increase in the product of the two numbers

asked by imli on May 11, 2016
99. ## Math

A customer paid \$247.13 in interest on a loan of \$950.50. What is the percentage of interest paid?

asked by Jennifer on May 31, 2012
100. ## Chemistry

A solution contains 153g Na3PO4 and 415g H2O. What is the percentage concentration of Na3PO4 in this solution

asked by wj on July 13, 2011