# 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

91,718 questions, page 193
1. ## chemistry

calculate the concentration of a solution when 35.0g of k2so4 is dissolved in enough water to make to make 125.0g solution.

asked by yasminb. on April 24, 2014
2. ## chemistry

a solution has gluten concentration of 2000ug/mL at 150uL. if 2uLof that solution is taken out what is the quantity of gluten in ppm?

asked by ms on March 22, 2012
3. ## Chemistry

A buffer solution contains 0.052 M HC2H3O2 and 0.025 M NaC2H3O2. The pH of this solution is _____. Ka for HC2H3O2 is 1.8x10-5.

asked by Morgan on December 1, 2015
4. ## algebra

how many mls of pure water does a pharmacist have to add to 50mls of a 15% minoxide solution to get a 10% minoxide solution?

asked by rf on October 9, 2011
5. ## chemistry

You want to prepare 500 ml of 1.0M acetic acid from a 17.4 M stock solution.What volume of stock solution is required?

asked by omar on November 28, 2015
6. ## chem

mix 35.50 mL of a 0.201 M solution of K2CrO4 with 35.50 mL of a 0.201 M solution of AgNO3, what mass of solid will form?

asked by darren on November 29, 2011
7. ## Chemistry

A solution of hydrochloric acid (HCl) contains 22.5% hydrochloric by mass. What is the molality of this solution I'm not sure how to start this problem...

8. ## chemistry

A solution is made by mixing 25 mL of .35 M LiOH with 15.5 mL of .2225 M NH3. Kb=1.8x10^-5 for NH3 Calculate the pH for the solution.

asked by sara on August 25, 2016
9. ## Chemistry

A 5.0−L sample of a 5.4M NaCl solution is diluted to 70L . What is the molarity of the diluted solution? How would you set this up and answer it?

asked by AF on May 1, 2014
10. ## chemistry

An aqueous solution of nacl has a mole fraction of 0.21. What is the mass of NaCl dissolved in 100.0 mL of solution?

asked by Ashley on February 13, 2011
11. ## chemistry

I- is converted into I2 by the addition of an aqueous solution of KMnO4 to an aqueous solution of KI. What is the oxidation number assigned to I2??

asked by Kayla on April 26, 2011
12. ## Chemistry

Exactly 23.6 ml of a 0.131 N HCl solution was required for complete neutralization of 25.0 ml of an NaOH solution.What was normality of the NaOH?

asked by Rajan Khare on June 25, 2011
13. ## science

Marianne poured salt crystals into water to form a solution.In the solution, which best decribes the salt.

asked by Christopher on December 3, 2009
14. ## chem

A solution is 42% NaCl by mass. If 314 mL of H2O was used to create the solution, calculate the , mass of salt that was us

asked by chevy on February 24, 2014
15. ## chemistry

Suppose you have 0.500 M sucrose stock solution. How do you prepare 250 mL of 0.348 M sucrose solution ?

asked by tracy on November 7, 2012
16. ## Algebra 2

How much wat must be evaporated from a 65-gallon tank of 40% salt solution in order to obtain an 80% salt solution?

asked by Trisan on October 18, 2009
17. ## math

The IV dose of mannitol is 1.5g/kg, administered as a 15% solution. How many mls of the solution should be administered to a 150 pound patient?

asked by melissa on March 9, 2008
18. ## Math

how many solutions does the equation have 4x + 3=2(2x +9) 1 one solution 2 no solution 3 an infinite number of solutions 4 impossible to determine My answer 1

asked by Anonymous on January 14, 2016
19. ## chem

The concentration (M) of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6O is ?????? M. The density of the solution is 0.79 g/mL. A) 21 B) 0.93 C) 6.0 × 10-4 D) 1.72 E) 0.58

asked by benju on September 26, 2010
20. ## Chemistry

You have a stock solution of 15.8 M NH3 . How many milliliters of this solution should you dilute to make 1350 mL of 0.300 M NH3

asked by Jennie on September 13, 2011
21. ## chemistry

A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 10-11 for Mg(OH)2 and Ksp = 6.0 10-26 for Sn(OH)2.

asked by Anonymous on April 27, 2010
22. ## chemistry/math

5.0 moles of solid sodium chloride (NaCl) are used to prepare a 5.0 M NaCl solution. What is the volume of the solution?

asked by Morgan on October 13, 2014
23. ## Chemistry

What determines whether or not the majority of acid is in the protonated form in solution? How does this incorporate both the pH of the solution and the pka of the acid?

asked by Cristian on October 30, 2012
24. ## Chemistry

If you mix 40.0 mL of a 0.389 M solution of K2CrO4 with 40.0 mL of a 0.389 M solution of AgNO3, what mass of solid forms?

asked by Angela on November 20, 2010
25. ## chemistry

Why is the 6M NaOH solution diluted before titrating the vinegar sample? How might your results be affected if you used the 6M solution rather than the 0.3M NaOH?

asked by jan on May 4, 2011
26. ## Chemistry

What is the concentration (in M) of an ammonia (NH3) solution if 12.23 grams of ammonia are dissolved to make a 520 mL solution?

asked by Ashley on March 11, 2013
27. ## Chemistry

You have a stock solution of 15.0 M NH3 . How many milliliters of this solution should you dilute to make 1200ml of 0.280 M NH3 ?

asked by Melissa on December 3, 2009

A solution can contain more than one aqueous solution. Name several of the aqueous solutions dissolved in water to make a drink with cola.

asked by danielle on February 1, 2009
29. ## Chemistry

If 36.00 mL of KMnO4 solution are required to oxidize 25.00mL of 0.02932 M Na2C2O4 solution what is the concentration of KMnO4?

asked by Tilly on November 2, 2010
30. ## Biology/ Chemistry

You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g

asked by Aileen on September 21, 2015
31. ## Chemistry

To make 1.5 L of 0.1 M NaCl from a 2.52 M stock solution, you would need to take ____ mL of the stock solution and add _____ mL of water.

asked by aaa on October 1, 2014
32. ## Chemistry 2

A solution of NaOH (aq) contains 8.2 grams of NaOH(s) per 100.0 mL of solution. Calcualte Ph and POH at 25 degrees celsiuis

asked by Jason on February 21, 2014
33. ## pharmacy math

the iv dose of mannitol is 1.5g/kg, administered as 15% solution. how many mls of the solution should be administered to a 150 pound patient.

asked by kim on July 12, 2010
34. ## Chemistry

A 0.1L 0.5M solution of sulphuric acid is mixed with 0.2L 0.1 M phosphoric acid , the concentration of H+ ions in the resultant solution?

asked by Anonymous on September 15, 2017
35. ## Chemistry

Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that contains 1.05% C2H5NH2 by mass and 1.10% C2H5NH2Br by mass

asked by HELP HELP on June 13, 2011
36. ## Chem 1

consider 400 mL of a0.266 M LiNO3 solution. To what volume must it be diluted to make a 0.075 M LiNO3 solution.

asked by jenni on May 2, 2012
37. ## Chemistry

A solution is prepared by dissolving NH3(g) in water according to the following equation. NH3(g) + H2O(l)=NH4^+(aq)+ OH^-(aq) If the pH= 9.60 what is the [OH-] in the solution.

asked by Julia on November 30, 2011
38. ## MATH

A provider orders 90 ml of a 2.5% mannitol solution. How much of a 25% mannitol solution should be added to water to achieve the appropriate strength?

asked by Niricoel on July 6, 2012
39. ## Science

If one third of 100 g of 27% aqueous sugar solution is taken in a beaker and 10 g of sugar is added to it, the concentration of the resulting solution will be

asked by Sannat on September 6, 2015
40. ## chemistry 2

A saturated solution of Mg(OH)2 has a pH of 10.52. What is the Hydronium concentration? Whats the hydroxide concentration? Is this solution acidic,or basic?

asked by ron on April 18, 2008
41. ## SEATTLE

Determine the volume of base ml needed to prepare the following 500 ml of 0.18 % NaOH SOLUTION USING A 10.0 % NaOH SOLUTION

asked by MH on March 21, 2014
42. ## chemistry

A stock solution is prepared by adding 26 mL of 1.1 M K3PO4 to enough water to make 30 mL. How many moles of K+ are in 21 mL of the stock solution?

asked by Ashley on November 4, 2010
43. ## Chemistry

The density of a solution of 3.69g KBr in 21.70g H2O is 1.11g/mL. What is the molarity of KBr in the solution.

asked by Jude on October 10, 2010
44. ## chem 150

10. Calculate the concentration of a solution made by diluting 10.00 mL of 0.1104 M HCl to 25.00 mL, then taking 10.00 mL of that solution and diluting to 50.00 mL.

asked by Sam on October 18, 2015
45. ## chemistry

A student has a solution with a mole fraction of 0.20 of chloroform in carbon tetrachloride. What is the molality of chloroform in the solution?

asked by Anonymous on January 5, 2013
46. ## CHEMISTRY - SCIENCE

A solution is 42% NaCl by mass. If 314 mL of H2O was used to create the solution, calculate the , mass of salt that was used.

asked by Shiv on February 24, 2014
47. ## Chemistry

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution

asked by cc on February 9, 2010
48. ## Chemistry

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution?

asked by cc on February 9, 2010
49. ## Math

A sample of seawater contains 0.000245 g of sodium chlorate per mL of solution How much sodium chloride is contained in 50.0 mL of this solution

asked by Anonymous on September 10, 2017
50. ## Chemistry

The osmotic pressure of solution containing 4 g of the solute per litre of the solution is 0.41 atm at 27. What is the molecular weight of the solute?

asked by Evans on August 13, 2018
51. ## chemistry

why is the osmotic pressure of 10 mole solution sodium chloride larger than that of sodium nitrate solution

asked by taher on May 24, 2010
52. ## chemistry

A 5.00 % m/m glucose solution has d = 1.02 g/mL. What is the mass of glucose in 375 mL of the solution? Enter only the numeric value for your answer (no units).

asked by Anonymous on September 20, 2011
53. ## Chemistry

What is the molarity of a nitric acid solution if 43.33 mL of 0.10000 KOH solution is needed to neutralize 20.00 mL of the acid?

asked by Anonymous on January 23, 2013
54. ## chemistry

A sample containing .187 g cl is dissolved in 50.0 mL water. How many moles of cl ion are in the solution? what is the molarity of the cl ion in the solution?

asked by kristen on March 1, 2011
55. ## science

An experiment calls for you to use 100. mL of 0.91 M HNO3 solution. All you have available is a bottle of 5.00 M HNO3. How would you prepare the desired solution

asked by Samantha on December 17, 2012
56. ## Chemistry

Enough of a monoprotic acid is dissolved in water to produce a 1.47 M solution. The pH of the resulting solution is 2.64. Calculate the Ka for the acid.

asked by Julia on April 10, 2013
57. ## chemistry

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution

asked by CC on February 9, 2010
58. ## chemistry

Have 250 mL of a 0.80 M solution of silver nitrate AgNO3 dissolved in water. how many grams of AgNO3 does the solution contain

asked by mary on October 18, 2011
59. ## chemistry

how many grams of NaOH should be used to make 200 mL of a 0.24M solution of NaOH starting with a .4M HCL solution

asked by tera on September 24, 2012
60. ## chemistry

what is the molarity of a HCl solution that contains 13.0 g of HCl in 125 mL of solution? Answer in units of M is it 3791.944 ?

61. ## personal knowledge

I was just wondering if it would make any difference if one were to use calcium bromide solution instead of sodium bromide solution. It depends on what you are using if for.

asked by Tanya on December 3, 2006
62. ## Chem

A 0.2 M KOH solution has a volume of 3 L. What percent of water should be evaporated to obtain a 0.6 M KOH solution? The answer I got is, 66.7%

asked by Summer on March 24, 2018
63. ## chemistry

A mixture is made using A 50.0 mL sample of a 0.20 M aqueous solution of NAOH was added to 50.0 mL of a 0.20 M aqueous solution of HCl.What is its pH at 25.0 °C?

asked by aireen on April 24, 2015
64. ## chem

what is the molality of a solution of 50.0 grams of propanol in 152 mL water if the density of wate is 1.0 g/mL and the density of the solution is 0.78 g/mL

asked by paula on February 12, 2011
65. ## maths

explain why sin(theta)=-0,5 has no solution at an interval (0°;180°) my solution: Because in quadrant two the sin is positive

asked by Nhlamulo on May 10, 2016
66. ## Chemistry

How many mL of a 10.0% by volume stock solution of HCl must be diluted with enough water to make 300.mL of a 1.5% by volume solution?

asked by Kelli on February 21, 2011
67. ## Chemistry

h2so4 solution containing 551.6 gram of h2so4 per liter of solution at 20 c has density of 1.3294 g/ml. molality?

asked by abdi umar on April 25, 2019
68. ## Further Mathematics Arithmetic Progression

I have a problem solving the question below could someone help me solve it or at least give me a hint on how to solve it ? If you can help here is the question ; p,q,r are three consecutive terms of an A.P whose sum is 21. The ratio p:r = 6:1 , Find p:q:r.

asked by Ini on January 21, 2018
69. ## Prealgebra

Please help me to solve this word problem. How do I write and equation and solve? Find three consecutive even integers such that 50 times the smallest is 88 less than 46 times the largest

asked by Mikey on February 7, 2018
70. ## Math

Check And Help? 1. √x-10+4=0 Answer: x=26 2.√3x+1=7 Answer: x=16 Help With These: 3. √x+6=x how would you solve this? I don't get how would It? 4. √x+4 = √x-1+1 it looks similar to problem 2 but it doesn't quite have the same amount of numbers in

asked by Unknown" on August 21, 2012
71. ## ALGEBRA

How do you solve the rational equation: (n/n-2)+(n/n+2)=(n/n^2-4) I know that the LCD of the equation is (n+2)(n-2) because that is what you get when you factor out the n^2-4 in the last part of the question. I thought I did it right until I reached the

asked by Katie on April 15, 2008
72. ## Adding and subtracting mixed numbers

I am trying to help my son with his homework but I have no Idea on how to solve the problem. If you can please explain step by step how to solve it. (Simplify (4 1/8 + 6 1/4) - 2 1/2 I am lost when it tells me to rename if possible.

asked by Bella on May 31, 2016
73. ## Math

Hello, I'm doing a review sheet for math and a certain question states: "solve: ln(3/4)" What should I take solve to mean? Do I just change it's form to ln(3/4) = ln3 - ln 4 ? Or, perhaps, I need to actually enter in the value into a calculator. How would

asked by Mary on September 11, 2012
74. ## Management of information systems

Information systems cannot solve every business challenge. Identify 2-3 business issues and provide an explanation of why technology cannot be used to aid or solve them.

asked by Sam on February 11, 2011
75. ## Algebra

Can someone please help me with math problem and explain to me step by step how to solve it so I will know how solve other problems like this Thank you in advance Multiply and then, if possible, simplify by factoring /7x /21y

asked by Anonymous on February 28, 2012
76. ## Statistics homework distribution problem?

i need help with how to solve this: consider a normal distribution with mean 30 and standard deviation 2. what is the probability a value selected at random from this distribution is greater than 30? the book gives me the answer but i need to know how to

asked by jess on February 20, 2012
77. ## Math

I have to use my answer from a previous question (factorise and solve x^2+x-30=0 which i factorised as (x-5)(x+6)=0 and then solved as x=5 or x=-6) i now have to explain how i can use this answer to solve th equation 4x^2+4x-120=0 and then say what are the

asked by P on July 4, 2010
78. ## trig

ok I'm trying to solve for an angle knowing adjacent and opposite of a triangle so I do tangent by definition tan theta = a^-1 o how do I algebraically solve for theta

asked by trig on July 30, 2009
79. ## PHYSICS'S

How much heat would it take to change 1.0kg of water at 20°C to steam at 110°C. I can't get the right answer that is 2.6×10^6J. Please tell me how can I solve this problem, I want to learn how to solve These problem plz help me.

asked by Riana on March 31, 2013
80. ## Math

1. Solve the equation -5y-9=(y-1) A. -1/2 B. -2 1/2

asked by Petter on August 20, 2017
81. ## Chemistry

What would be concept in which you would have to use electron configurations in order to solve? and how would you determine the answer? One uses the electron configuration to solve the bonding preferences and energies.

asked by Danni on March 29, 2007
82. ## math

Show that if x is a nonzero column vector in R^n, then the nxn matrix: A = I - 2/||x||^2 * xx^T is orthogonal. Notation key: ||x|| = norm of x x^T = transpose of x I = identity matrix. Let me try to convince a math student to use "physics" notations that

asked by mathstudent on January 13, 2007
83. ## math question

hi, i have a math question that i need help with: when data are non-numerical but can be ordered, such as letter grades, the mean cannot be calculated directly; but both the median and mode can be found. Last year in Ms. Flag's history course, the final

asked by kelsey on August 29, 2006
84. ## English

How have the definitions of work, success, wealth, opportunity, and family changed over time? what does this question mean? how do you write your opinion? You might consider these questions: Is work what you get paid to do? Is work what you accomplish?

asked by Kalli on October 25, 2006
85. ## Chemistry

1.)An ammonia/ammonium buffer solution contains 0.35 M NH3 and 0.72 M NH4+. The Kb value of ammonia is 1.8×10−5. Calculate the pH of this buffer. 2.) Nitrous acid has a Ka of 4.5×10−4. What is the pH of a buffer solution containing 0.15 M HNO2 and

asked by LuigiR on November 25, 2015
86. ## Chemistry

Which of the following results from the presence of a solute in a given solvent? A. The vapor pressure of the solution is lower than that of the pure solvent. B. The boiling point of the solution is lower than that of the pure solvent. C. The freezing

asked by Alexa on May 22, 2014
87. ## Physics

A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. A). In a hard board, the bullet penetrates 3.0 cm and comes to a stop. What is the average force exerted on the bullet by the board? B). For a soft board, the bullet goes

asked by Reed on March 18, 2016
88. ## statistics

An employer wants to estimate to set a time limit so that 75% of the employees will finish a job on time. Past history has shown that the time required to do the job is normally distributed and has a mean time of 26 minutes with a standard deviation of 5

asked by mocha on March 20, 2010
89. ## Pre-Algebra

Find two consecutive odd integers such that 5 times the first integer is 12 more than 3 times the second. let X = 1st odd number. and Y = 2nd odd number = X + 2 since it is consecutive. Now set up two equations (the first is Y = X + 2). The second is 5X =

asked by Tammy Evert on July 16, 2006
90. ## intermediate algebra

1. Two numbers differ by 8. If one-half the larger is added to one-fourth the smaller, the resulting sum is 22.Find the numbers. 2. Ten years ago a man was three times as old as his son. In 12 more years the son is three-fifths as old as his father. How

asked by sylvia on October 31, 2016

In this problem they show a diagram of a pulley system with an inclined plane (25 degree incline). There is a box called m1=47kg resting on the incline plane and m1=35kg hanging on the vertical line. The question reads: The coefficient of friction between

asked by Danielle on March 13, 2012
92. ## stats

The percent of fat calories that a person that in America consumes each day is normallydistributed with a mean of 36 and a standard deviation of 10. Suppose that 16 individuals are randomly chosen for an experiment. 1. Completely describe the distribution

asked by Kayla on April 28, 2013
93. ## algebra

How much of a solution that is 45% sulfuric acid needs to be mixed with a solution that is 90% sulfuric acid to produce 120 liters of a solution that is 60% sulfuric acid?

asked by Jo on March 16, 2017
94. ## algebra

How much of a solution that is 45% sulfuric acid needs to be mixed with a solution that is 90% sulfuric acid to produce 120 liters of a solution that is 60% sulfuric acid?

asked by jo on March 16, 2017
95. ## Math

4018 PTS Billymkhoi HIGH SCHOOL MATHEMATICS 10+5 pts At the instant that a cake is removed from the oven, the temperature of the cake is 350°F. After 10 minutes, the cake's temperature is 200°F. If the temperature of the room is 70°F, how much longer

asked by Anonymous on February 28, 2016
96. ## pre calculous

use the properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms. show your work ln x^2/y^3 Assuming x,y AND z are positive use properties of logariths to write the expression as a single logarithm

asked by kevin on June 12, 2011
97. ## AP Chem

A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the

asked by Ana on October 19, 2009
98. ## chemistry

A student placed 10.5 g of glucose C6H12O6 in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.mL mark on the neck of the flask was reached. The flask was then shaken until the

asked by Cory on October 6, 2009
99. ## Chemistry

What volume of 0.200M of aqueous solution of formic acid, a weak monoprotic acid (KA = 1.78x10-4) and 0.200M aqueous solution of NaOH would you mix to prepare a 500mL of a buffer solution of pH = 4.0. I know I need to use the H-H equation, I'm just not

asked by Sam on September 26, 2012
100. ## Physics

Please show me how to work the following problems. 1) A cyclist whose mass is 48 kg turns a corner with a radius of 30 m at a speed of 25 m/s. A) What is the magnitude of the cyclist's acceleration? B) What is the magnitude of the net force acting on the

asked by Sue on October 14, 2016