# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

92,096 questions, page 195
1. ## science

An excess of aluminum metal is added to 200.0 mL of 0.025 M solution of CuCl2, reducing the Cu+2 ions to metallic Cu. If the temperature of the solution increases from 25.0 to 27.5 degrees celsius, what is the enthalpy of this reaction per mole of Cu

asked by chem on December 29, 2010

a childs bank contains $6.30 in dimes and quarters. there are twice as many dimes as quarters. how many of each kind of coin are in the bank? let d = #dimes and q=#quarters. The total is worth$6.30. eqn 1 is 0.10*d + 0.25*q=$6.30 eqn 2 is 2*#quarters = asked by katie on November 29, 2006 3. ## chemistry find the mass of silver chloride formed from 33.2ml of a 0.100M solution of silver nitrate and 200ml of 0.200M solution of calcium chloride solution Solution plan:use mass to mass calculations mass of AgNO3-moles of AgNO3-moles of AgCl-mass of AgCl asked by Nyasha on December 6, 2016 4. ## Physics Show that the total mechanical energy of a satellite (mass m) orbiting a distance r from the center of the Earth (mass M-e)is: -(1/2)*(G m M-e)/(r if U = 0 at r = infinity. Show that although friction causes the value of E to decrease slowly, the kinetic asked by Anonymous on March 20, 2008 5. ## physics (special relativity) A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e). (a) show that the folowing process is dynamically impossible. (b) Explain in detail how this process can be made possible (c) for part b what would be asked by will on June 8, 2011 6. ## As physics The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am asked by cylinder on November 7, 2017 7. ## As physics The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am asked by cylinder on November 9, 2017 8. ## Algebra The work and solution to: Stefan is bicycling on a bike trail at an average of 10 miles per hour. Erik starts bicycling on the same trail 30 minutes later at 16 miles per hour. How long will it take Erik to pass Stefan? asked by Michelle on May 29, 2013 9. ## History 3.)A slave's life was full of hardships and difficulties. Workdays were long and exhausting, full of backbreaking labor, and slaves would work 10 to 16 hours a day. Masters could hire out their slaves to work for other masters; however, the slaves were not asked by #FreeGucci on May 2, 2016 10. ## Equation of a straight line. 1. Find the equation of the line described in each case: a) Gradient 3, cuts through (0, 6). b) Steepness of 4, passes through (0, -2). c)Parallel to y = 5x - 1, cuts the y-axis at (0, 10). d)Cuts through (0, 7) and (5, 17) 2. Here are 3 eqautions: A. y + asked by DJ Frankie Pigeon on January 15, 2007 11. ## Math A store buys 77 1/2 pounds of mulch in a large shipment. They divide the mulch up into bags that can each hold 2 1/4 pounds. The store sells one bag of mulch for$2.25. for each part of the question, show your work. a. How many full bags of mulch will the

asked by ... on October 3, 2018
12. ## English Help ASAP

1. Part A In "All Together Now," Barbara Jordan's main purpose is to persuade readers that a tolerant society is best created by working on a small scale. inform readers of the recent history of the civil rights movement in the United States. praise the

asked by Lip on December 1, 2016
13. ## Math check

Decide whether each equation has one, no solutions, or infanatly many solutions 1.) 2(x - 3) = 2x One solution no solutions many solutions infinatly many solutions 2.) 3(y - 3?) = 2y - 9 + y One solution no solutions many solutions infinatly many solutions

asked by Josh on January 8, 2014
14. ## CHEMISTRY

Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. If the addition of 10.0 mL of a NaIO3 solution to the Cr (III) ion solution causes precipitation to begin, what is the concentration of

asked by MC on May 19, 2016
15. ## Titration/Acid-base chem

a .4000 M solution of nitric acid is used to titrate 50.00 mL of .237 M barium hydroxide (Assume that volumes are additive). a) Write a balanced net ionic equation for the reaction that takes place during titration. b) what are the species present at the

asked by Keith on May 6, 2007
16. ## math

Mr. Mitchells office is on a winding side road next to a highway exit.He is driving on the highway at 60mph, and at this rate he expected to arrive at his office at 8:45a.m.However at 8:30 he was forced to leave the highway and take the side road, driving

asked by nancy on March 16, 2009
17. ## Physics repost please check

A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.280 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.210 kg cup of coffee. Obtain the

asked by Mary on April 24, 2007
18. ## linear algebra

Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank

asked by Anonymous on April 29, 2015
19. ## linear

Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank

asked by jessica on April 28, 2015
20. ## Biology

Examine the scenario. A cell is sitting in a beaker filled with an isotonic solution. A researcher adds a large quantity of salt to the solution. How will the cell be affected by this change? The cell will increase in size and then burst. No change will

asked by Chey on December 17, 2018
21. ## Physics

A 285-kg load is lifted 22.0 m vertically with an acceleration a=0.170 g by a single cable. Determine the tension in the cable. (N) Determine the net work done on the load. (J) Determine the work done by the cable on the load. Determine the work done by

asked by Eden on October 17, 2010
22. ## Chemistry

Question : 4 moles of A(g) is added to a fixed volume container and left until they arrive at the equilibrium status. 2A(g) A2(g) At 127 C total pressure of the equilibrium system is 8.314*10^5 Pa and the density of the mixture of gas is 10 kg/m^3 . If the

asked by Ashley on January 27, 2019
23. ## Resume help

I really do not find many cake decorating positions needing a resume so I went with what I am studying in school. Is this ok? Career Objective: To assist the sick as a registered nurse. I would also like to become a traveling nurse at some time to. I am

asked by Cole on October 28, 2007
24. ## Biology

Describe the relationship between the respiratory and the cardiovascular systems! Doesnt the respiratory feed the cardiovascular with oxygen, and getting rid of CO2 and water? Doesnt the cardiovascular system feed the respiratory system with a fluid for

asked by Aletha on March 18, 2007
25. ## Physics

Hello I have an assignment to do about the force table. I'm not sure about my answers, hope someone could check it for me if I answered correctly. 1.What kind of forces do you use on the force table? Explain about the used forces. Resultant force,

asked by Aransaja on November 22, 2010
26. ## Chemistry

Question: The solubility of a salt in water increases if either ion of the salt undergoes hydrolysis. Comput the molar solubility of AgCN in water assuming no hydrolysis. B) compute the molar solubility of AnCN in water assuming hydrolysis occurs. The

asked by eliz on May 6, 2009
27. ## Life orientation

What are causes of social issue.what are five factors of social issue.the impact of the contemporary of social issue. How the contemporary social issue impact negative on local and global communities list five.give a detail description of your plan and

asked by Emely on August 1, 2013
28. ## English

I tried to check the you forms. Thank you for your corrections. Other minor adjustments can be made to improve people's situation at work. 2) First, a person should communicate his point of view with clarity. 3)Second, he should do his best to maintain a

asked by Henry2 on December 19, 2011
29. ## chemistry

A sample of 1.00 mol H2O(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of vaporization of water at 100°C is 40.656 kJ mol−1. Find w, q, ∆U, and ∆H for this process. ------------- I can solve for ∆H: n

asked by chemstudent on February 5, 2009
30. ## Differential Equations

Question 1 A particle moves on the x-axis with an acceleration , a=(6t-4)ms^-2 . Find the position and velocity of the particle at t=3 , if the particle is at origin and has a velocity of 10ms^-1 when t=0 by using either the method of undetermined

asked by mrexp21 on November 5, 2011
31. ## Physics

How much work is done in lifting a 6kg object from the ground to a height of 4m? A 12n object is lifted 5m how much work is done How much work is done if a 5n object is lifted from the ground to a height of 8m? How much gravitational potential energy does

asked by Derrick on March 28, 2014
32. ## chemistry

A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the

asked by Christina on September 29, 2012
33. ## MATH URGENT

a. Solve a – 9 = 20 b. Solve b – 9 > 20 c. How is solving the equation in (a) similar to solving the inequality in (b)? d. How are the solutions different? I don't know how to do this i forgot ... could u help (Steve, or Mrs.Sue, or Writeteacher plz

asked by Gabby on January 18, 2013
34. ## calculus

Use the function given to answer the following questions. g(x)= 2 x-2/(squareroot x)-2 The first 2 is set in the middle of the division line. I think signifying that you solve the x-2/(squareroot x)-2 first then multiple everything by 2. problem to solve

asked by Janet on February 12, 2011
35. ## Math

I am having a hard time with these problems and could you show me how to work them so next time i will know how. find the first and third quartiles of Q and Q of the set of numbers 11,12,16,14,14,14,8,12,10,18 find any outliers ( if any) in the set of

asked by Gertrude Sanders on November 8, 2008
36. ## Math

An article in the local paper states that 30% of the students at Oak Grove Middle School earned a place on the Silver Honor Roll. If there are 920 students at Oak Grove, how many are on the Silver Honor Roll? USE A PERCENT RULER TO HELP YOU DECIDE. SHOW

asked by Robert on October 30, 2013
37. ## Trigonometry desperate help, clueless girl here

2. solve cos 2x-3sin x cos 2x=0 for the principal values to two decimal places. 3. solve tan^2 + tan x-1= 0 for the principal values to two decimal places. 4. Prove that tan^2(x) -1 + cos^2(x) = tan^2(x) sin^2 (x). 5.Prove that tan(x) sin(x) + cos(x)=

asked by Suzy on August 16, 2013
38. ## General Chemistry

When a solution of nickel (II) chloride is mixed with a stoichiometric amount of colorless sodium hydroxide solution, a green, gelatinous precipitate forms. (a) Write the balanced molecular equation and the net-ionic equation for this reaction. molecular:

asked by <3 on July 16, 2013
39. ## chemistry

An aspirin tablet weighing 0.548 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

asked by jared on May 10, 2007
40. ## chemistry

The first step in the process used to recover zinc metal from zinc sulfide ore is the reaction of zinc sulfide with oxygen gas to produce zinc oxide and sulfur dioxide. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) When the external pressure is 142700 Pa and

asked by windal on April 25, 2016

1-On May 1, 2012, Pinkley Company sells office furniture for $150,000 cash. The office furniture originally cost$375,000 when purchased on January 1, 2005. Depreciation is recorded by the straight-line method over 10 years with a salvage value of $37,500. asked by miley on February 25, 2013 42. ## Chem Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction asked by Anonymous on February 23, 2014 43. ## math: repost with corrections p. 942 #5 This is a three-part question: a. the graph y = f(x) in the xy-plane has parametrization x=x, y=f(x), and vector formula r(x) = xi + f(x)j. Use this to show that if f is twice-differentiable, then k(x) = ((absvalue f''(x))/[1+((f'(x))^2]^3/2 b. asked by jaime on December 10, 2007 44. ## Chemistry Convert the information described below into balanced equation: (a) When a mixture of copper(II) oxide and carbon is heated, elemental copper forms and carbon monoxide evolves into the atmosphere. (b) When a concentrated solution of sodium hydroxide is asked by Dan on March 12, 2017 45. ## Math OK a pattern has 1 small square 1 3/4 on all sides middle has 5 1/4 on all sides large has 8 3/4 on all sides. I did'ent know how to do this now she wants to make the pattern 2 1/2 times bigger and show what will be the new lengths of the sides of the asked by Dawn on January 29, 2014 46. ## math Hi This is a three-part question: a. the graph y = f(x) in the xy-plane has parametrization x=x, y=f(x), and vector formula r(x) = xi + f(x)j. Use this to show that if f is twice-differentiable, then ((absvalue f''(x))/[1+((f'(x))^2]^3/2 b. use the formula asked by Jaime on December 8, 2007 47. ## chemistry (a) The measured pH of a 0.200 M HBr solution at 25°C is 0.806. Calculate the activity coefficient for H . (b) The measured pH of a 0.200 M HNO3 solution at the same temperature is 0.822. Calculate the activity coefficient for H in this solution. asked by kdawg on February 20, 2014 48. ## Math - Logarithmic Solve: 2^(5x-6) = 7 My work: log^(5x-6) = log7 5x - 6(log2) = log7 5x = log7 + 6(log2) x = (log7 + log2^6) / 5 And textbook answer: (log7) / (log2) What did I do wrong? asked by Anonymous on December 13, 2007 49. ## Physics 30 A system containing a frictionless pulley is described in the diagram on the right (the 2.0 kg box is on the floor while the 3.0 kg box is 0.5m high) . If this system is released, what will be the momentum of: A. the 2.0 kg box when the 3.0 kg box hits the asked by Mona on January 23, 2016 50. ## Physics 30 A system containing a frictionless pulley is described in the diagram on the right (the 2.0 kg box is on the floor while the 3.0 kg box is 0.5m high) . If this system is released, what will be the momentum of: A. the 2.0 kg box when the 3.0 kg box hits the asked by Mona on January 23, 2016 51. ## science a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished? asked by alex on January 9, 2013 52. ## Health Sciences How could you relate work of podiatrist with speech and language therapist and occupational therapist? They are three different professions but the question asks about how they work together as a team asked by Viola on December 2, 2011 53. ## math okay so I have to work out this problem for school work and I don't understand it. the problem is : if the perimeter of an isosceles triangle is 2x + 10, what is the length of one of the congruent sides ? PLEASE HELP ME ! asked by kayla on June 18, 2014 54. ## science a cart was pulled for a distance of 1 kilometer and the amount of work accomplished equal 40.000 joules. with what force was the work accomplished? asked by alex on January 9, 2013 55. ## Algebra Tom gets paid$2.80 per hour.overtime rate is 1 and half time more.He got \$173.60 for 54hours of work.How many hours did he work overtime?

asked by Ani on November 17, 2015
56. ## university of oklahoma

A 85-g bullet is fired from a rifle having a barrel 0.582 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 15750 + 9900x - 27500x2, where x is in

asked by Nawaf on February 28, 2013
57. ## Chemistry

Weight of the Rock Salt Sample: .343 (g) Weight of the Rock Salt Solution: 9.910 (g) Trial #1 Trial #2 Trial #3 Weight of Rock Salt Solution Delivered (g) : .89 1.17 .786 Weight of AgNO3 Solution Delivered (g) : 1.53 .548 .786 Concentration of AgNO3 :

asked by Selena on October 4, 2014
58. ## Math

The diameter of a basketball rim is 18 inches. A standard basketball has a circumference of 30 inches. What is the distance between the ball and the rim in a shot in which the ball goes exactly in the center of the rim? Show your work. First I must find

asked by Mace on May 1, 2018
59. ## Math Word Problem

A cross section of a nuclear cooling tower is a hyperbola with equation x^2/90^2-y^2/130^2=1. The tower is 450ft tall and the distance from the top of the tower to the center of the hyperbola is half the distance from the base of the tower to the center of

asked by John on April 29, 2009
60. ## physics

Car Q continue at 26m/s west at the next overpass zip past a cop. The cop begins accelerate 3m/s^2. Eventually cop catches up to car Q who maintained the previous speed(25m/s). Cop side by side motion Q to pull over. A) Determine the time elapsed since cop

61. ## Physics, Math, Aerospace, Engineering

A de-orbit burn, similar (but not the same) to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 99.1 meters per second will be used to decrease the Shuttle’s

asked by Wolf on January 3, 2015
62. ## Chemistry

A buffer is made by mixing 100 mL of 0.25 M acetic acid (CH3COOH) and 150 mL of 0.10 M sodium acetate (CH3COONa). Calculate the pH of the solution after 0.5g of solid NaOH is added to the solution (Given Ka (CH3COOH) =1.8 x 10-5)

63. ## Chemistry

What type of reaction occurs when potassiumbromide solution is mixed. With lead(II) acetate solution? Gas evolution, oxidation reduction, precipitation, acid-base neutralization, or no reaction

asked by Coug on January 8, 2010
64. ## Chemistry

The electrolysis of 250ml of a brine solution was carried out for a period of 20mins with a current of 2A. The resulting solution was titrated with 0.62M HCL. How many ml of HCL would be required to achieve natural point

asked by Shilpa saxena on May 19, 2017
65. ## science

The solubility of sodium chloride is 36.0 g/100. ml of water, and the density of saturated NaCl solution is 1.202 g/mL.. I have 500. mL of a 1.00 M NaCl solution. If I boil it to the point of saturation, what is the final volume?

asked by Nasser on July 25, 2012
66. ## Chemistry partial molar volumes

The partial molar volumes of the CCl4 and benzene are 122cm3/mol and 98.0 cm3/mol, respectively in a solution in which mole fraction of chloroform is 0.2. Calculate the volume occupied by 2.5 moles of the solution. Thank yOu.

asked by Urgent pls. on August 24, 2011
67. ## chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 550 mL of a solution that has a concentration of Na^+ ions of 0.500 it M?

asked by Anonymous on November 11, 2010
68. ## General Chem lab

Hi, how do I calculate how many grams of unknown diprotic acid are needed to make 150mL of 0.750N (normal) solution? and to make 125mL of 0.500M (molar) solution? we have 0.5000M of NaOH.. Please help me...

asked by Ashley on October 30, 2011
69. ## Chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400mL of a solution that has a concentration of Na+ ions of 1.10M ?

asked by Ashley on September 24, 2014
70. ## Chemistry

How many grams of glycerin C3H8O3 must be dissolved in 375.9g of water at 100 degrees Celsius to reduce the pressure of water above the solution to 714.6mmHg. The solution is a non-volatile compound

asked by Jude on April 23, 2011
71. ## chemistry

A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 250 mL of a solution that has a concentration of \rm Na^+ ions of 0.600 \it M?

asked by Katie on March 30, 2011
72. ## chemistry

A solution contains 0.20 M Cl- and 0.20 M SO4^2-. a) identify a cation that could be added to the solution to give a precipitate with only one of these anions. MY answer: Cu+ b) write the net ionic equation for the precipitation reaction in part a) MY

asked by Anonymous on December 11, 2014
73. ## Chemistry

I have these two questions on my section review that I don't know how to answer. Can someone help me? Please and thank you. 3. Describe in your own words how to prepare 100 mL of a .85 M solution of sodium chloride. 4. If you dissolve 2.00 mol KI in 1.00 L

asked by Ana on April 29, 2010
74. ## 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 19, 2012
75. ## Chemistry

An aqueous salt solution is formed by adding 11.67 g sodium sulfate (solute) to water (solvent). What mass (in g) of water is used if the freezing point of the solution is -12.9 Farenheit. Kf H2O = 1.86 Celsius/m

asked by jenny on February 24, 2012
76. ## Chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550 mL of a solution that has a concentration of Na+ ions of 0.600 M ?

asked by Lo on October 14, 2015

Hi, I am asked to do this: 12. A buffer solution containing HBO32 –(aq) and BO33 –(aq) ions is used to standardize pH meters in the range pH > 7. Write net ionic equations for the reactions that occur in the buffer solution for the following

asked by David on August 8, 2006
78. ## Chemistry

An aqueous stock solution is 85.0% H2SO4 by mass and its density is 1.83 g/mL. What volume of this solution is required to make 1.00 L of 1.35 mol/L H2SO4(aq)? Give your answer in millilitres, accurate to three significant figures.

asked by Wes on September 30, 2014
79. ## Chemistry

Hello, I have a question about something we learned in chemistry today. We've been going over Ka/Kb table values, and using them to determine if a solution is acidic, basic or neutral. One of the compounds (in aqueous solution) are NH4OCl (aq), which is

asked by Sally on May 18, 2010
80. ## Chemistry

How to find the mass of a solid formed when: 45.00ml solution of 0.003 800 mol/L lead (II) nitrate is mine dish a 30.00 mL solution of 0.08800 mol/L strontium iodide

asked by Sam on November 29, 2015
81. ## chemistry

The pH of 100 mL of a 0.10 M aqueous solution of Compound Z is 11.30. (a) Is Z an acid, a base, neither, or cannot be determined? Justify your choice. (b) Write the relevant Bronsted-Lowry equation showing how Z behaves in aqueous solution

asked by alexis on August 3, 2008
82. ## MATH

I have about 30 questions of this, so I need to understand the process. Please make it as detailed as possible! Thank you! Q: To reduce 32 grams of a 25% solution of antiseptic to a 10% solution, how much distilled water should a pharmacist add? A:

asked by LILY on July 21, 2008
83. ## chemistry

what is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions solution"?

asked by Anabeth on March 6, 2016
84. ## chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 500 mL of a solution that has a concentration of Na+ ions of 0.700 M

asked by ionic on March 27, 2011
85. ## Chemistry

My brain refuses to wrap around titration. Problem: Given 150.0 mL of a 1.05 M HCl solution, how many milliliters of a 2.50 M Al(OH)3 solution are required to neutralize the HCl? I think the balanced formula is 3HCl + Al(OH)3 - AlCl +3H20 but that's as far

asked by Wolfmaid on December 7, 2009
86. ## Chemistry

What is the concentration of methanol in a solution prepared by combining 7.85mL of a 3.693M methanol solution with 17.50mL of water? Assume volumes are additive and report your answer to 3 decimal places.

A 0.2mol/L solution of KMnO4 has been added to 10 ml of 0.5mol/L acidified FeSO4. write the balance equation of the reacttion then calculate the volume of the oxidizing solution that should be added to oxidize all the Fe^2+ ions. please help and thank

88. ## chemistry

You add thiocynanate ions to a solution The molarity of silver ion is 0.1M initially. Calculate the max concentration of SCN- ion that exists in the solution before AgSCN beings to precipitate? ?

asked by emily on March 15, 2011
89. ## Chemistry

What mass of sucrose (C12H22O11) should be combined with 477g of water to make a solution with an osmotic pressure of 8.15atm at 275K ? (Assume the density of the solution to be equal to the density of the solvent.)

asked by chemstud on February 8, 2015
90. ## AP Chemistry

A 2.685 g sample of KHC8H4O4 was dissolved in water and uses to standardize a NaOH solution. The endpoint was reached after 38.25mL of titrant were delivered. Find the molar concentration of the NaOH solution.

asked by Rebecca on February 4, 2018
91. ## Chemistry

A volume of 60.0mL of aqueous potassium hydroxide (KOH ) was titrated against a standard solution of sulfuric acid (H 2 SO 4 ). What was the molarity of the KOH solution if 25.7mL of 1.50 M H 2 SO 4 was needed? The equation is 2KOH(aq)+H 2 SO 4 (aq)¨K 2

asked by Sarah on September 26, 2013
92. ## chemistry

A scientist wants to make a solution of tribasic sodium phosphate,Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550 ml of a solution that has a concentration of Na+ ions of 1.40M ?

asked by ASh on February 7, 2012
93. ## chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 450 mL of a solution that has a concentration of Na+ ions of 0.700 M

asked by allen on March 27, 2011
94. ## Science

What is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions in solution?"

asked by Anonymous on March 6, 2016
95. ## Chemistry

I am really stuck on these 2 questions: 1. Why was 2M HNO3 added before adding 0.05M AgN03? 2.Write a full equation b.) an ionic equation between silver nitrate solution and sodium chloride solution.

asked by Mahta on March 9, 2010
96. ## math

what if ur teach iz a total which? also what happens when you get totaly confused when you have to work out the problems?if don't work out the problems, theni get a 000! That's why the best way to learn is by studying yourself using good books! :) First

asked by katharine on November 14, 2006
97. ## math help me

an ellipse has an area of 4.17 in^2, and a minor axis that is 2 inch long. solve fot the major axis. how do i solve this?

asked by Anonymous on January 10, 2009
98. ## algebra

solve the polynomial y=2x^2-4x+1 I am sure neither your text nor your teacher asked you to "solve the polynomial y=2x^2-4x+1 " are you graphing the function, or are you solving the quadratic y=2x^2-4x+1 ?

asked by Haylee on May 17, 2007
99. ## Problem solving:for 3rd grade

Write a real-world problem that you can solve by adding or subtracting.Then give your problem to a classmate to solve.

asked by Jon on October 25, 2012
100. ## advanced functions grd 12

im not sure wheer to start and how to do solve this problem solve: cosX(2sinX-3^1/2)=0 ,0

asked by kerry on May 8, 2012