# 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 423
1. ## chemistry

How many ML of H2SO4 (20m) are needed to make 500ml of 5M solution?

2. ## Chemistry

How many moles of HNO3 are present in 35.0 mL of a 2.60 M solution of nitric acid?

asked by Veronica on October 7, 2010
3. ## calculus

find the general solution to the differential equation. dy/dx=secxtanx-e^x

asked by Anonymous on February 25, 2011
4. ## math,correction

Graph each of the following equations by first solving for y. 2x – 3y = 12 so it would be: y = 2/3x – 4 and the solutions points would be: So (-3,-6) is a solution

asked by jasmine20 on January 14, 2007
5. ## precalculus

I have the problem 2e^x = squareroot(10e^x) +3. the solution must be in exact form only.

asked by Sara on January 13, 2012
6. ## Chemistry

A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.

asked by Jackson on March 1, 2016
7. ## chemistry

how much ml of concentrated hci required to make 0.5N hcl solution? /

asked by Ashwin on March 24, 2015
8. ## Chemistry

Determine the total grams of Potassium Iodate solution

asked by Anonymous on October 1, 2015
9. ## chemistry

give me twenty examples of suspension and colloidal solution

asked by narender on July 5, 2014
10. ## chemistry

Which must be a mixture of substances? a- Solid b- Liquid c- Gas d- Solution

asked by John on March 5, 2008
11. ## Algebra

which ordered pair in the form (x, y) is a solution of this equation? (x+6)y=9 Possible Answers: A. (12,2) B. (3,1) C. (2,1) D. (4,1)

asked by Niki on January 22, 2016
12. ## Chemistry

What effect does diluting the sodium hydroxide have on the basicity of the solution?

asked by Dick Rogers on December 15, 2007
13. ## Chemistry HELP URGENT PLEASE!!!

what current (in amperes) is required to plate out 2.85 g of Cr from a Cr^3+ solution in a period of 2.50 hr?

asked by Maho on March 17, 2014
14. ## history

Evaluate the effectiveness of nixon's solution. was it successful? how do you determine this?

asked by aria on May 12, 2016
15. ## MATH

A 0.26 M solution of a weak acid HA is 0.35 % ionized. What are the H+ , A- , and HA concentrations at equilibrium? What is Ka?

asked by Ash on January 28, 2017
16. ## Chemistry

What would be the molality of a solution made up of 75cm^3 of water and 0.21 g of NaCl?

asked by Alice on February 19, 2009
17. ## ap chemistr

The ionization constant of HA is 1×10−6. What must be the ratio of [A−] to [HA] for the preparation of a buffer solution with a pH of 5.74?

asked by gabriella on February 4, 2014
18. ## Chemistry

How much more acetic acid (pKa = 4.76) than acetate should be in solution to maintain a pH of 4.00?

asked by Jematormal91 on March 29, 2012
19. ## physics

in electrolysis how is conductivity affected by the molecular mass of the solution

asked by physics123 on February 20, 2012
20. ## chemistry

how would you prepare 1L of a .5M solution of each of the following? Sodium carbonate from the pure solid

asked by kelly on August 25, 2010
21. ## chemistry

What is the concentration of a solution containing 25g of NaCl in a 250mL sample?"

asked by Samantha on June 6, 2011
22. ## math

A=29 degrees, a= 5, b=13, How many solutions are there for triangle ABC and whats the solution(s)

asked by lindsey on May 3, 2011
23. ## physical science

list two safety procedures to create a supersaturated solution

asked by matthew on May 3, 2011
24. ## CHM

Calculate the solubility of Cu(oh)2 in grams per liters of solution if Ksp for Cu(OH)2 IS 4.8X 10^-20

asked by ami on June 27, 2010
25. ## Chemistry

What is the pH when 3.46 mL of 2.37 M KOH is added to 26.9 mL of a 1.78 M solution of formic acid (HCOOH)?

asked by sarah on February 24, 2011
26. ## Chemistry

How to calculate the density and viscosity of a 10 % by wt salicyclic cid solution.

asked by arp on February 15, 2010
27. ## CHEMISTRY

CONC.OF NO2^-AND H3O^+IN A SOLUTION IN WHICH 4.5% OH HNO2 WAS IONIZED

asked by JOSEPH on October 20, 2017
28. ## chemestry

if you dissolve 350 g of K(2)CrO(4)in 2.4 kg of water, what is the molality of the solution?

asked by crystal on April 25, 2013
29. ## Chemestry

Find the molarity of a solution containing 0.75 mol of NaCl with a volume of 1.5 L.

asked by Becky on November 23, 2012
30. ## science

Explain why the temperature of water might increase when a solution forms.

asked by Morgan on October 6, 2012
31. ## chemistry

What is the boiling point of an aqueous solution that freezes at -6.7 degress C. Please help.

asked by swtnblk on November 5, 2011
32. ## chemistry

How much water must be added to 6.0 mL of a 0.05 M stock solution to dilute it to 0.020 M?

asked by Anonymous on May 21, 2011
33. ## Chemisty

calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX

asked by Emily on March 29, 2010
34. ## Chemistry

How many grams of perchloric acid are dissolved into 3.86 L of water, if the pH of the solution is 4.03.

asked by Jose on May 11, 2016
35. ## Some basic concept of chemistry

0.5M aluminum sulphate aques solution normality calculation

asked by Chhaya on January 25, 2017
36. ## chemistry

calculate the poh of 1 dm^3 of naoh solution containing 4 g of sodium hydroxide

asked by Anonymous on May 5, 2016
37. ## chemistry

why do you use Na2Co3 extract solution tor the analysis of anions

asked by saiful on July 25, 2011
38. ## chemistry

A solution made from 19.0 g of NaBr and 500 mL of water has what molarity?

asked by Cindi on May 4, 2011
39. ## algebra

Find solution to equation X^2+x+ãx^2+x-2 =0 Note; square root is x^2+x-2

asked by Jessica on July 21, 2009
40. ## Chemistry II

Calculate the freezing point of a 0.75 m solution of Al2(CO3)3.

asked by Chase on September 16, 2009
41. ## chemestry

Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.20×10−2 M Ca(OH)_2 diluted to 430.0 mL.

asked by chris on February 22, 2012
42. ## chemistry

What volume of 0.5M H2SO4 will exactly neutralise 20cm3 of 0.1MNaOH solution?

asked by aniekan on July 27, 2015
43. ## Chemistry

A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

44. ## science

Which one of the solution have high boiling point 1m H3PO4 or 1m CaCl2 ?

asked by SERHED on January 25, 2016
45. ## Chemistry

What is the molality of ammonium ions in a 1.75 m solution of (NH4)3PO4?

asked by haley on September 16, 2009
46. ## Algebra2

Write three trigonometric equations each with the complete solution pi+2pin

asked by steve on May 10, 2017
47. ## Chemistry

What is the maximum [Ba^2+] that can be maintained in 1.100 L of a 030 M solution of Na2SO4?

asked by Jeremy on November 30, 2010
48. ## Chemistry

How many grams of solute are in 0.504 L of a 0.350 M K2CO3 solution?

asked by msid on March 4, 2016
49. ## chemistry

How would you prepare a supersaturated solution of CuSo4 in 100ml of water

asked by Jen on November 24, 2012
50. ## Chemistry

There are 200 mmoles NaOH/400ml. What is the molarity of the solution?

asked by Jessi on April 21, 2009
51. ## Chemistry

How many grams of NaCL are required to make 250ml of a 0.4M solution?

asked by Jessi on April 21, 2009
52. ## Chemistry

need help to balance half reaction in basic solution IO3 to I2

asked by Shana on July 27, 2013
53. ## math

tell whether the point (9,3) is a solution of the inequality 4x-5y

asked by maya on April 22, 2009
54. ## Chemistry

when 5.00 g of CaCl2 dissolves in 50.0g of water, what is the boiling point of the solution

asked by Leah on April 17, 2011
55. ## chemistry

What would be pH of a 0.01 M solution of a very expensive weak base, unobtainamine, whose pKb is 3.8? 1. 2.9 2. 14 3. 2 4. 7 5. 11.1

asked by Anonymous on February 7, 2015
56. ## Chemistry

How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?

asked by Aaron on December 13, 2015
57. ## College Chem II

Determine the [H3O+] of a 0.160M solution of benzoic acid.

asked by Katie on March 7, 2010
58. ## Maths

How can it be possible for a set of inhomogeneous simultaneous equations to have no unique solution?

asked by Alice on April 28, 2009
59. ## Chemistry

what is the pOH of a solution that has a OH- cincentration equal to 1,36 multiple by 10^-10M?

asked by prudence on April 6, 2018
60. ## Math

asked by Jenna on September 28, 2016
61. ## science

what is the solute and solvent in a solution made from 15 mL of oxygen and 5 mL of helium?

asked by jan on November 4, 2010
62. ## chemistry

how many ml of 0.15 NaOH solution are required to neutralize 35.00 ml of 0.22 moles of HCL

asked by mc on April 14, 2010
63. ## Math

write three fractions that can be written as percents between 50% and 75%. Justify your solution.

asked by Jen on November 13, 2014
64. ## science

What is the [Pb+2] in a saturated solution of Pb(OH)2 for each of the following initial pH values? Ksp Pb(OH)2 = 2.8x10-16 a. pH = 13.00 b. pH = 9.20

asked by N/A on January 31, 2011
65. ## math

find the linear differential equation that has y=5-x+2e^xsin3x as a particular solution

asked by toby on July 21, 2015
66. ## math

state the value of the discriminant and the discribe the nature of the solution 20x^2-8x-17=0

asked by marie on August 29, 2010
67. ## Chemistry

Concentrated nitric acid is 70% HNO3 and 14.7 M. What is the density of the solution?

asked by Julia on May 12, 2016
68. ## Algebra

PLEASE HELP ME!!! 1. Which of the following is an example of an open equation? A. -2b = 6 B. 4a - 5 = 12 C. 5Y = y +8 D. Z-15= -12 2. Which of the following equations has 3 as the solution? A. -2b=6 B. 4a-5=12 C.5y=y+8 D. Z-15=-12 my answers: 1. 8+0=8 2.

asked by Damien666158 on October 15, 2018
69. ## science

in a solution can amounts of different components vary? like in a heterogenous mixture

asked by bella on October 6, 2007
70. ## Algebra 2

Find the solution of the exponential form in terms of logarithms 2^(2x+13) = 3^(x-45)

asked by Andrew on April 30, 2010
71. ## CHEMISTRY.

Calculate the ph of a solution containing 0.15M HF (ka= 7.1x10^-4) and 0.26M NaF.

asked by Siobhan.R on May 10, 2017
72. ## chemistry

What is [H+] concentration in a 4M aq solution of acetic acid (Ka= 1.8 E-5)? what formula do you use to get the answer?

asked by Anonymous on July 3, 2011
73. ## chemistry

How would you make 250 ml of a .51M calcium hydroxide solution?

asked by Sarah on March 30, 2011
74. ## algebra 1a

can someone help in solving this and use set builder notations to describe the solution Please 4(8-2x)+2x

asked by robbie on January 30, 2011
75. ## Chemistry

What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?

asked by Marcus on February 10, 2013
76. ## Math

1÷5 (45y+20)+3÷4 (12y=24)=19 Find solution set (9y=14)+(9y=18)=19 18y = 33÷8

asked by Sue on July 17, 2015
77. ## chemistry

0.947 moles of NaC2H3O2 dissolved in 100 mL solution

asked by chem on April 16, 2015
78. ## Math

Determine the quadratic equation whose solutions are: 3 and -2 Solution(with workings):

asked by Ghiffari on October 23, 2011
79. ## Chemistry

How many liters of 0.85 M HCl solution would react completely with 3.5 moles Ca(OH)2?

asked by Kevin on June 20, 2016
80. ## Chemistry

How would we make 500mL of a 1.5 percent w/v solution of KCl in water?

asked by Stacy on October 12, 2012
81. ## chemistry

Could you produce a cell that contains a 1.0M solution of Fe2+ and Fe3+ ions?

asked by Wina on March 5, 2011
82. ## Chemistry

How many moles of methanol are dissolved in 1.5 L of water to make a 2.0 m solution?

asked by Bigfoot on May 18, 2012
83. ## chemistry

what is the solubility of X in mole/dm3 if 25cm of its saturated solution contains 4.0g of X.

asked by emma 45 on March 14, 2012
84. ## chemistry

If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

asked by Anonymous on April 7, 2011
85. ## Jane

I am confused what would be a real-life solution using polynomial division.

asked by Math on January 21, 2010
86. ## chemistry

what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride

asked by Emily on August 21, 2013
87. ## chemistry

a solution is made by mixing 14.5g of NaOH and 72.0 mL of 0.250 M HNO3

asked by Anonymous on March 4, 2011
88. ## chemistry

how will u prepare 500g of aqueos solution which is 10% NaOH by mass?(%W/W)

asked by yui on March 4, 2011
89. ## Calculus

Find the solution subject to the initial conditions. dP/dt = -2P P(0)=1 dP/-2P = dt then do i take the antiderivative? what would i do next??

asked by Daniel on December 4, 2008
90. ## Math urgent

explain how to compute the xy term of the product (3x-4y)^2? if possible with solution please.... its urgent

asked by Ayushma on September 7, 2008
91. ## pharmacology

How many grams of dextrose are in 50ml normal saline solution

asked by carol on March 9, 2017
92. ## chemistry

what mass of water is necessary to prepare 150.0g of 1.30% saline solution

asked by Anonymous on December 12, 2014
93. ## Chmistry

how to calculate ph if given contain 0.63g og hno3 pet 100 ml solution

asked by Fofo on February 6, 2016
94. ## Chemistry

What is the molarity of a solution of H3PO4 if 11.1 mL is neutralized by 33.2 mL of 0.161 M NaOH?

asked by taytay on April 20, 2014
95. ## chemistry

You have 37.0 mL of a 3.00 M stock solution that must be diluted to 0.500 M. How much water should you add?

asked by Brianna on January 21, 2013
96. ## Science

How many grams of NaOH will be needed to prepare 250ml of 0.1M solution:-

asked by Md Shams Rizvi on March 10, 2017
97. ## chemistry

How would you determine the polarity of the cell after each addition of Fe3+ solution

asked by ronika kumar on September 23, 2015
98. ## school math 3rd grader

how to find solution to subtraction problem without doing any calculation. explain?

asked by tom on November 18, 2015
99. ## Chemistry

A 0.035 M solution of a weak base has a pH of 10.88. What is the Kb for the acid? Where Di I even begun**???

asked by L.Bianchessi on March 5, 2012
100. ## chemistry

What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2?

asked by Kelley on April 4, 2010