# Please observe the solution for the following two problems : (a) 2x + 18 = x + 25 (b) 3x + 5 = 7x - 15 (a) 2x + 18 = x + 25 2x - x = 25 -

30,299 questions, page 143
1. ## Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

asked by Anonymous on January 16, 2013
2. ## Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

asked by Anonymous on January 16, 2013
3. ## Math 116 A

Solve 3(3-8x)+5

asked by katie on September 22, 2011
4. ## College Algebra

Solve the following equation: 7m^2 = 12 - 17m If more than one solution, separate with commas

asked by Nancy on May 26, 2011
5. ## Chemistry

What is the freezing point of an aqueous solution that boils at 102.1 C?

asked by Justin on April 26, 2010
6. ## Chemistry

(b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid?

asked by Anonymous on January 16, 2013
7. ## math

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

asked by maya on April 22, 2009
8. ## math

What would your solution set be? Please be sure to show your work so that we can discuss the solutions. x + 4y = 1 2x + y = 7

asked by brandy on September 23, 2011
9. ## Chemistry

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

asked by Jessi on April 21, 2009
10. ## Algebra 1

Do the equations x = 4y + 1 and x = 4y - 1 have the same solution? How might you explain your answer to someone who has not learned algebra?

asked by Austin on September 6, 2012
11. ## 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
12. ## Math the end

Can domeone help me with this? solve 7x + 4 ¡Ý - 31 or 9x + 4 ¡Ý - 21 I need to know how to write the solution {x x> } This is my last day of this class

asked by Katie on September 23, 2011
13. ## Algebra

Do the equations x = 4y + 1 and x = 4y - 1 have the same solution? How might you explain your answer to someone who has not learned algebra?

asked by Theresa on September 6, 2012
14. ## chemistry

a 0,25M solution of a week acid is 3% dissociated.calculate ka

asked by racha on April 4, 2012
15. ## physical science

list two safety procedures to create a supersaturated solution

asked by matthew on May 3, 2011
16. ## chemistry

As AgNO3 dissolves, what change occurs in the temperature of the solution?

asked by Anonymous on February 13, 2011
17. ## Math 116A

Solve 3(3-8x)+5

asked by katie on September 22, 2011
18. ## 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
19. ## Chemistry

Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 8.03? The Ksp of Fe(OH)2 is 4.87×10-17 M3.

asked by Jematormal91 on April 5, 2012
20. ## Math

When solving a system algebrically how can you tell if solution is the equation of the line

asked by Taylor on February 17, 2014
21. ## chemistry

If a solution containing 0.22 M Cl -, Br -, I -, and CrO42- is treated with Ag+, in what order will the anions precipitate?

asked by Jess on September 23, 2011
22. ## science

Calculate the pH of the solution 5ml of M/5,HCl+10ml of M/10 NaO

asked by KANNAN on August 12, 2016
23. ## Math

Could 7 be part of the solution set for the inequity? 5x > 40? Explain your reasoning

asked by Amy on March 19, 2015
24. ## character education

Which of the following characterizes an equitable solution to conflict? one side gets everything he or she wants nobody gets what he or she wants each person gets something; nobody gets everything C?

asked by Bri on December 1, 2017
25. ## chemistry

25 mL 0.4 M KOH will neutralize 10 mL 1.0 M H2SO4 solution. A) True B) False

asked by ashley on March 27, 2015
26. ## Algerbra I

Help! I don't get this. solve each inequality. Graph the solution set, if there is one. 1. n-4>11 2. 4q7 4. a+3s/3 8. x/2-4>-6

asked by Jared on February 4, 2008
27. ## science

How to prepare 250ml (n/10) sodium hydroxide solution (NaoH)

asked by Anime's on August 9, 2016
28. ## Math

If x = xo and x = x1 are both vector solution of Ax=b, then x1 - xo is in the Null Space of A. True or False?

asked by Anonymous on September 7, 2012
29. ## chemistry

How many grams of water should you add to 33.0 of sucrose, , to get a 0.795 solution?

asked by Juliana on September 25, 2011
30. ## Chemistry

What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0 X 10-15. a) 4.7 b) 7.2 c) 9.0 d) 9.1 e) 9.3 What should I do to solve for this? Thank you

asked by Sheri on April 5, 2012
31. ## Chemistry

What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?

asked by Jessi on April 21, 2009
32. ## chemistry

How many moles of NaOH must be added to 1.00L of this solution to increase the PH to 9.25?

asked by Heather on July 18, 2012
33. ## algebra 1

Do the equations x = 4y + 1 and x = 4y - 1 have the same solution? How might you explain your answer to someone who has not learned algebra?

asked by Austin on September 6, 2012
34. ## Chemistry

What is the molarity of a solution prepared by diluting 100g of NaH2PO4 to 1L?

asked by Jessi on April 21, 2009
35. ## chemistry

how do you Prepare a 0.1 L of a 0.1 M NaCl solution, and describe the process in writing.

asked by jack on February 9, 2011
36. ## chemistry

how do you Prepare a 0.1 L of a 0.1 M NaCl solution, and describe the process in writing.

asked by jack on February 9, 2011
37. ## chemistry

I need 2.5ml of 10% aqueous sodium hydroxide solution. How do I make it?

asked by Anonymous on January 8, 2018
38. ## chemistry

balance net Ionic solution AgNo3 + NaOH

asked by Jean on January 25, 2013
39. ## Science Mixture

Could you use the filtration method to separate a sugar water solution? Why or why not?

asked by Harmony Ann on February 12, 2014
40. ## Chemistry

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

41. ## Chemistry

Determine the pH of a solution after 20.00 mL of 0.4963 M HI has been titrated with 12.64 mL of 0.5174 M NaOH.

asked by Sarah on March 16, 2017
42. ## calculus plz help me

integrate:dx/((x-1)sqrt(x^2-2) plz show solution i plead

asked by samuel on May 5, 2016
43. ## Chemistry

How do you prepare 17.2cm³ of 36% conc HCL per dm³ of solution?

asked by Charles on April 1, 2017
44. ## Chemistry

Determine the [H3O+] in a 0.3 M solution of HClO4. Answer in units of M.

asked by hello on February 25, 2010
45. ## 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
46. ## Chemistry-ish

What is the pH of a solution that has a OH- concentration equal to 1x10-5M? 14-x 14-5=9 can I use that simple of math 9?

asked by Jeremiah on May 3, 2016
47. ## Chemistry

Please check my work: What is the pOH of a solution containing [H+] = 1x10-11 M? log H=14-11 3 right

asked by Jeremiah on May 3, 2016
48. ## Chemistry (acids and bases)

Calculate pH, pOH, [H+], [OH-], and Ka for a 0.026 M solution of HI (a strong acid). Please help me :(

asked by Marie on January 7, 2011
49. ## chemistry

What is the pH of the solution created by combining 0.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?

asked by Cindy on July 12, 2010
50. ## Chemistry

Determine the pH of a solution after 20.00 mL of 0.4963 M HI has been titrated with 12.64 mL of 0.5174 M NaOH.

asked by Sarah on March 17, 2017
51. ## Chemistry

What is the molality of the solution that results when 33.3g of C2H5OH are added to 76.7g of water?

asked by Anonymous on May 2, 2014
52. ## algebra

Solve using the addition principle 2¡Á+3¡Ü¡Á+5 The solution set is {¡Á|¡Á¡Ü blank }

asked by Faye on May 18, 2011
53. ## Chemistry

3.65 g of HCl are dissolved in 2lit of the solution find the polarity

asked by Bharath on March 31, 2017
54. ## chemistry

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

asked by Anonymous on May 5, 2016
55. ## Chemisty

250g of water containing sucrose freezes at -3.5C. What is the molality of the solution?

asked by Jared on February 24, 2013
56. ## history

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

asked by aria on May 12, 2016
57. ## 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
58. ## chemistry

What is the pH of the solution created by combining 2.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?

asked by bme1 on April 17, 2010
59. ## 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
60. ## chemistry

give the washing solution in the process of tio2 preparation

61. ## 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
62. ## Clinical Calculations

What weight of NaOH would be required to prepare 3000 ml of a 2.5M solution?

asked by Tamaka on November 8, 2009
63. ## Chemistry

What mass of K2SO4 would you measure out to prepare 550mL of a .76 M solution?

asked by Josh on May 9, 2011
64. ## science

why doesn't solute added to a saturated solution dissolve

asked by Anonymous on November 8, 2009
65. ## chemistry

How many milliliter of 2.5 M NaOH are neededto neutralize 2.7 ml of a 4.9 M H2SO4 solution?

asked by kelli on April 29, 2014
66. ## chemistry

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

asked by Ashwin on March 24, 2015
67. ## 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
68. ## Chemistry

What is the pH of a buffer solution that is 0.20M methylamine and 0.15 M methylammonium chloride. which do i get the pH of

asked by LT on April 2, 2008
69. ## Algebra

Solve the inequality. Graph the solution on a number line. -2 ≤ d + 0.5 ≤ 4.5

asked by Anonymous on January 12, 2015
70. ## Math

Determine which ordered pair is not a solution of y=-5x-4. A (10, -52) B (7, -39) C (-7, 31) D (8, -44) I'm thinking its A but I'm not 100% sure

asked by Daren on April 20, 2018
71. ## college algebra

Compute x +y, given the linear system with T # 1 and with the ordered pair (x,y) as solution x + 2y=3 Tx + ( T+1)y = T + 2

asked by Mark on December 15, 2010
72. ## math

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

asked by toby on July 21, 2015
73. ## 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
74. ## chemistry

how many kg of h20 must be added to 75.5g of Ca(NO3)2 to form a 0.500 m solution?

asked by lynda smith on November 18, 2009
75. ## Natural science

What happens to the level of the salt solution in the distilling flask ? Explain why this happens

asked by Phumelele on April 23, 2016
76. ## chemistry

calculate the pH of a 1.94M solution of nitrous acid (HNO2 - ka = 4.5E-4).

asked by Tara on December 15, 2010
77. ## general chemistry

Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution

asked by kelia on March 7, 2013
78. ## Math- Graphing (check answer)

Determine which ordered pair is a solution of y= -5x + 10. A. (-15,5) B. (2,0) C. (-1, -5) D. (3, 25) My answer is A. Am I correct?

asked by on March 28, 2017
79. ## Chemistry

What are the concentrations of OH– and H in a 0.00070 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.

asked by Mark on October 20, 2011
80. ## Trigonometry

Convert to a rectangular equation. r+5sinØ = 7cosØ Is the solution to this x^2+y^2-7x+5y

asked by Christa on July 23, 2015
81. ## chemistry

describe a prepare a 0.25 L.0.5 mol standart solution of NaoH

asked by bihah bi on August 6, 2012
82. ## Science

Determine the pH of a .10M solution of KA, the potassium salt of HA. For HA, Ka=1.0x10^-5

asked by Stephanie on August 8, 2012
83. ## Algebra

I have to identify the system of equations, if any for: -2x-4=1, 12=-6x-3 no solution? infinitely many solutions? (0,-1)? or (-1,0)?

asked by Sandra on May 4, 2014
84. ## Chemistry

Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.

asked by Ashley on March 5, 2012
85. ## chemistry

What is the number of moles of NaOH in 1.91 mL of a 872.25 molar solution?

asked by chels on October 19, 2011
86. ## maths

How many ordered triples of positive integers (a,b,c) with 1¡Üa,b,c¡Ü5 are there such that ax^2+bx+c has a rational solution?

asked by Don on February 28, 2013
87. ## Maths

How many ordered triples of positive integers (a,b,c) with 1

asked by Don on March 1, 2013
88. ## math

solve the equation for x. write the solution set x2-100x=0

asked by aj on May 18, 2011
89. ## chemistry

0.30M nh3 and 0.20M HCL calculate the ph of solution kb=1.8 × 10^-5

asked by kanks on March 2, 2013
90. ## math

solve the equation for x. write the solution set . -x2 + 12x = 0

asked by aj on May 18, 2011
91. ## chemistry

Calculate the grams of Ca(OH)2 used to make 500 mL of a 0.150 M solution.

asked by gab on April 30, 2018
92. ## chemistry

determine the concentration of Fe2+ ion the prepared solution

asked by methove on August 2, 2012
93. ## 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
94. ## world issues

Is fair trade a solution for farmers in the developing world?

asked by vikki on December 21, 2010
95. ## Chemistry

How many mL of 0.5 M HCl(aq) are needed to neutralize a 288 mL solution of 0.25 M NaOH?

asked by Anonymous on January 11, 2015
96. ## Chemistry

What is the ph of the final solution when 10 mL of HCl is completely neutralized with 11mL of 0.1M Na(OH)?

asked by Niki on March 6, 2012

How many grams of chloride are present in 1.00 liter of a 1.5 M solution of CaCl2?

asked by margrav2 on December 16, 2010
98. ## chemistry

what is the pH of a solution that has 12.2 grams of hydrochloric acid in 500 ml of water

asked by kandace on March 5, 2013
99. ## algebra 1

I have my solution to this problem but I am not very confident in it being correct. I just want to see if some one else comes up with the same answer. Solve (x^2 - 2x)(x + 3) = -2x(x = 1)

asked by Dippy on March 9, 2009
100. ## 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