# Sorry I nee to add something. The Ka for HF = 1 x 10^-3. Is 50.0 mL of 1.0 M HF and 25.0 mL of 1.0 M NaOH a buffer with an approximate pH of 3? I say yes. Right?

6,868 questions
1. ## Chemistry

Sorry I nee to add something. The Ka for HF = 1 x 10^-3. Is 50.0 mL of 1.0 M HF and 25.0 mL of 1.0 M NaOH a buffer with an approximate pH of 3? I say yes. Right?

asked by Jim on May 6, 2010
2. ## Substitution Method in Algebra

nee help with any of the examples help me to solve this. thanks. y= 2x +3 y= 4x -1

asked by Andree on November 12, 2008
3. ## Chemistry

This is a balancing eqn Im finding rather tricky: ___Fe(NH4)2(SO4)2 6H2O + ___ H2C2O4 + ___K2C2O4 + ___ H2O2 ---> ___K5Fe1(C2O2)2 3H2O + ___(NH4)2(SO4) + ___H2SO4 + ___ H2O remember H2O2, an oxidizing agent, was used in synthesis, so youll nee to do a

asked by Tokey on July 22, 2010
4. ## Legal Studies

I nee help to write my legal studies assignment that's due tomorrow,any want to help?

asked by Kaylee on August 15, 2013
5. ## History Civil War

I nee help to find a picture of the Union commander Edward M King. He was in the battle of Johnsonville.

asked by John on February 17, 2008
6. ## critical thinking

I have this crt205 9 week final project due and I don't knwo how to do it.I'm confused of how to fill out the forms and the topic I nee to use.

asked by edith on April 13, 2013
7. ## pre algebre

nee help adding/subtracting fractions, x represents a number, solve by writing answer as integer or simple fraction.

asked by tee on March 2, 2014
8. ## math

How many mls of 55% Dextrsoe and water do you nee to make 980 mls of 27.5 Dextrose? No clue on what to do.

asked by Brian on June 1, 2015
9. ## Simple ratio question but confused.

This is ratio Question but i m not fimilar with this type of ratio . 1/3:x=1/3 Plz guide me some one .. I cam with answe 1/9* nee d help

asked by shan on July 24, 2010
10. ## GUESS MY RULE WITH LETTERS

I CAN`T FIND OUT WHAT THE RULE IS I KNOW THAT THE LETTERS THAT ARE IN THE RULE ALL HAVE STRAIGHT LINES N THE ONES THAT DO NOT FIT ALL HAVE CURVES I JUST NEE TO KNOW WHAT THE RULE IS PLEASE SOMEONE HELP ME

asked by MELISSA on January 6, 2014
11. ## bartlett hill,math

add the like terms together.a+b+a+2b Okay. Well, the questoin says to add the like terms together, that means add the A's together and add the B's together. a+b+a+2b Alright, so your a's and your first b don't have a number in front of them. That means the

12. ## sound language

what is pitch? what are the levels of pitch? what are some example of activities regarding pitch? nee your response as soon as possible...

asked by rosette on March 1, 2009
13. ## chemistry

to complex ( K2[Cu(C2O4)2]H2O, add 1 com of dil. H2SO4. Add KI; then add 1-2cm3 choloform and shake gently. what are the observations.

asked by jamie on April 3, 2016
14. ## social studies

the long-distance navigation skills of the polynesians eventually led to the A : development of aborigine culture B : development of farming in New Guinea C : settlement of Nee Zealand and Hawaii *** D : settlement of samoa and tonga

asked by Jayden LOL on April 24, 2019
15. ## statistics

Use summation notation to express each of the following calculations: a. Add 1 point to each score, then add the resulting values. b. Add 1 point to each score and square the result, then add the squared values. c. Add the scores and square the sum, then

asked by Liz on June 22, 2011
16. ## statistics

Use summation notation to express each of the following calculations: a. Add 1 point to each score, then add the resulting values. b. Add 1 point to each score and square the result, then add the squared values. c. Add the scores and square the sum, then

asked by Liz on June 22, 2011
17. ## English

1. Add some soil at the bottom. 2. Add some soil in the ground. 3. Add some on the floor. 4. Add some soil in the hole. (Are the sentences grammatical?)

asked by rfvv on June 15, 2013
18. ## COMPUTERS-EXCEL 2007

which one of the following formulas accurately describes the meaning of this formula: (A5*B5)+10 A)add 10 to B5 and multiply the resulting value by A5 B)multiply A5 bY B5,then add 10 to the resulting value C)divide B5 into A5,then add 10 to the result D)

asked by vedrana on October 4, 2011
19. ## math

Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41 A)add -19w B)add 6w C)add 19w D)add -36

asked by nicky on February 25, 2010
20. ## Math

Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41 A)add -19w B)add 6w C)add 19w D)add -36

asked by Anonymous on March 5, 2010
21. ## Math

Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41 A)add -19w B)add 6w C)add 19w D)add -36

asked by george on February 3, 2010
22. ## math

Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41 A)add -19w B)add 6w C)add 19w d)add -36

asked by Anonymous on February 25, 2010
23. ## Statistics: Regression

The June 1997 issue of Management Accounting gave the following rule for predicting your current salary if you are a managerial accountant. Take \$31,865. Next, add \$20,811 if you are top management, add \$3604 if you are senior management, or subtract

24. ## Chemistry

Sorry, I didn't finish the question: Which of the following will increase the molar sollubility of Ag2CO3? (The Ksp for Ag2CO3 is 8.1 x 10^12.) a. Add HCl b. Add AgNO3 c. Add NaCN d. a and c e. a, b, and c

asked by Jim on May 4, 2010
25. ## english

How would you form a superlative for the adverb widely? A. Add the word less B. Remove the “ly” C. Add the word most D. Add the suffix “est” I think it's D. Is that correct?

asked by Brianna on August 19, 2014
26. ## math

1 2/3 add 2 8/9 then divide the answer by 3. 1 2/3 add 2 8/9= 7/3 add 26/9= 21/9 add 26/9=47/9 I got that bit I just don't know how to divide

asked by remi on March 7, 2015
27. ## english

How would you form a superlative for the adverb widely? A. Add the word less B. Add the word most C. Remove the “ly” D. Add the suffix “est”

asked by Tatyana on November 14, 2014
28. ## Algebra

Hello all! I had a quick homework question: I have to prove that the output of this always ends up as 1, regardless of the starting number: *Think of a number between 1 and 10. Add 1; double the result; add 3; subtract 4; add 5; halve the result; add 6;

asked by y912f on June 21, 2014
29. ## Math

Identify the sequence as arithmetic, geometric, both, or neither 1.7,9,11,13 A. Arithmetic B. Geometric C.both D.neithier 2. 2,1,1/2,1/4 A. Arithmetic B. Geometric C. Both D. Neither 3. Write a rule for the sequence 1,2,4,8 A. Start with one and then add

asked by Tim on February 28, 2019
30. ## French

I should circle the most appropriate subject: 1) Maxime/elsa est née à paris 2) mon frere/ma sœur. S'est engagé dans la lutte contre le sida 3) mes parents/ mes cousines. Se sont installées en gualdeloupe 4) ils/elles sont partis au concert

asked by Mia on March 13, 2013
31. ## French

Does anyone know when you should add e's/s's to french verbs, and when you shouldn't? I understand the purpose, to make feminine or plural depending on what gender the subject is. But what types of verbs should you add the e's/s's to? Would you add them

asked by Shelly on December 18, 2008

I still do not understand this problem? find a number such that when added to the numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks If you add 7 to the numerator and 7 to the denominator you get 9/18. 9/18= 9x1/9x2 = 1/2 It

asked by vince on March 8, 2007
33. ## Chemistry

Write a procedure to demonstrate the effect of higher concentrations of HCl on its rate of reaction with antacid tablets. I have HCl with a concentration of 1.0 mol/L. This is what I have so far. Are my concentrations correct for this procedure? E is my

asked by Carolyn on May 22, 2013

29. Ray Long wants to retire in Arizona when he is 75 years of age. Ray, who is now 60, believes he will nee \$200,000 to retire comfortably. To date, he has set aside no retirement money. If he gets an interest of 12 percent compounded semiannually, he

asked by Anonymous on September 11, 2012
35. ## math

kelly solved the following problem on her recent math test 121/11+4*8=120 the answer was marked wrong by your teacher and kelly is asking you to explain why she missed the promblem.whicthsolutions would you tell her A.divide 121 by 11,multipy 4 by 8 then

asked by jamia on September 2, 2009
36. ## MATH

asked by Jallai on February 28, 2019

how do you check addition problems by adding up? Let's use this addition problem as an example. 21 35 ___ First you add 1 + 5. To check your work, add up, 5 + 1. If you have a column of numbers and you go down each column to add them together, that's

asked by zeke on January 7, 2007
38. ## English

â€œMy father wanted me to have his ancient Toyota pickup truck for sentimental reasons however, itâ€™s always breaking down.â€ Which of the following changes should be made to sentence 9? A. Add a semicolon after reasons. B. Add a comma after

asked by Anonymous on April 11, 2018
39. ## English

Write down the following exprressions. 1. die 2. skate 3. run 4. picnic You have to make the ing forms of the verbs. In #1 change ie into y and add ing to the end. In #2, remove e and add ing to the end. Skate is composed of a consonant and a silent e. So

asked by John on June 9, 2008
40. ## chemistry 12

i nee help in this question any help would be appreciated the question is 1.Given the reaction: A(g) + 2 B(g) ---> C(g) + D(g) ��H = -40 KJ, a. If the activation energy in the forward direction is 80KJ, plot the PE diagram. b. Plot a KE

41. ## Math Solve the following

Rebekah is an elementary school teacher. She is making an individual craft project kits that requires 2/3 of a cup water to complete. How many cups of water will she nee if she i making the craft project kits for each of he24 students?

asked by jessica on October 31, 2012
42. ## chemistry

i nee help in this question any help would be appreciated the question is 1.Given the reaction: A(g) + 2 B(g) ---> C(g) + D(g) ��H = -40 KJ, a. If the activation energy in the forward direction is 80KJ, plot the PE diagram. b. Plot a KE

asked by john on April 29, 2010
43. ## ALGEBRA 1

asked by kj on January 29, 2019
44. ## algerbra 1

what is the answer to 5x-16=14-5x Just giving you the answer is not what this forum is about. We'd be defeating the purpose of you assignment by doing that. Try to work the variables to one side, say the lefthand side, and the numbers to the other side.

asked by olivia on September 27, 2006
45. ## art

I nee to know about African art and what makes it distinctive -has anyone got any ideas thanks Thank you for using the Jiskha Homework Help Forum. Here are some links for you to peruse: 1. http://www.africanart.org/ 2.

asked by flubba on May 10, 2007
46. ## chemistry

How can you shift the equilibrium of the reaction between hydrogen and chlorine toward the products? H2(g) + Cl2(g) --> 2HCl(g) A. Add Cl2. B. Remove H2. C. Increase the pressure. D. Add HCl. would the answer to this one be to add Cl2? so answer A?

asked by erika on September 15, 2016
47. ## math .

asked by eri on October 6, 2017
48. ## math

Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 5. B: the numbers add to 4. C: at least one of the numbers is 3. D: the numbers do not add to 10. Express the event "The numbers do not add to 4." in

asked by Liz on December 5, 2010
49. ## math

I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add ((r+10)/r)+(r/(r+10)) 6.) divide

asked by jen on March 10, 2010
50. ## English

Read each sentence. Identify the comma error and put Add or Omit on the line to show how to correct the sentence. Then put the word in () before the error That shiny sleek car is new shiny add Courtney brought a delicious ham turkey, and beef sandwiches

asked by Jerald on November 27, 2012
51. ## math

NUMBER SEQUENCES identify the sequence as arithmetic, geometric, both, or neither. 1. 7, 9, 11, 13,... arithmetic**** geometric both neither 2. 2, 1, 1/2, 1/4,... arithmetic geometric**** both neither write a rule for the sequence 3. 1, 2, 4, 8,... start

asked by mjc_177 on March 5, 2019
52. ## Chemistry

Could someone answer this question. Im stuck on this one. Thanks In general, the most elegant way to add one carbon with an OH on it to a primary alkyl halide: A)Convert the alkyl halide to a grignard and add formaldehyde, followed by H3O B)Convert the

asked by Anonymous on April 21, 2011
53. ## math

sabrina used a calcutator and started adding the whole numbers in order 1+2+3+4+5+..... what is the last number she would add that would get the sum on her calculator over 1000? Try it yourself. You'll be surprised that it won't take very long to add up to

asked by ciera on January 23, 2007
54. ## Chemistry

Could someone answer this. Im stuck on it. In general, the most elegant way to add one carbon with an OH on it to a primary alkyl halide: A)Convert the alkyl halide to a grignard and add formaldehyde, followed by H3O B)Convert the alkyl halide to a lithium

asked by Anonymous on April 28, 2011
55. ## math

i need some to explain how to turn 1.05 into a fraction Do you know how to add fractions? 1 + 0.05 equals 1.05. So if you can convert 1 to a fraction and 0.05 to a fraction, you can add the two fractions together. Your answer is 1.05 as a fraction.

asked by Tammy Evert on July 19, 2006
56. ## math

1. First of all, pick the number of times a week that you eat chocolate. This number must be more than one but less than ten. 2. Multiply this number by 2 (just to be bold). 3. Add 5 (for Sunday). 4. Multiply it by 50. 5. Add 1750. 6. Add the last two

asked by opg on May 28, 2012
57. ## Chemistry

for the equilibrium, SbCl3 (s)+H2O SbOCl(s)+ 2HCl (aq)... A.) what reagent would you add to the system to dissolve SbOCl? B.) what reagent would you add to precitiate SbOCl? Help! would i use H2O to dissovle and add more HCL to precipitate??

asked by lisa on September 26, 2011
58. ## Math

Simplify the following by collecting like terms:- 2y add 3x add 7y - x equals Sorry cant find mathematical signs.

asked by Jasmin Z on August 20, 2017
59. ## math115

add -57+(-22)=-79 place numbers in acsending order 25,-13,8,-2,13,3,18=-13,-2,3,8,13,18,25 perform the indicated operation -21-(-9)/-21-(-21)=-12/-42 add -3/5+(8/35)=13/35 subtract -2.3-(-8.8)=6.5

asked by p on October 16, 2009
60. ## math115

add -57+(-22)=-79 place numbers in acsending order 25,-13,8,-2,13,3,18=-13,-2,3,8,13,18,25 perform the indicated operation -21-(-9)/-21-(-21)=-12/-42 add -3/5+(8/35)=13/35 subtract -2.3-(-8.8)=6.5

asked by p on October 16, 2009
61. ## Pre-Algebra

I need help with one question. -6q+5.8=23.8 So first I add 6 to each side to cancel the 6, but do I add it to the 5.8 or the 23.8? I kinda need to get walked through the problem. . . Thanks!

asked by Help me! on December 14, 2017
62. ## math

what is the average of 132,145,140,128? do u add them all togher then divide ? or just add them and get the answer?

asked by erica on February 12, 2008
63. ## statistics

when figuring mode, mean and median do you add all the like figure such as days and no. of discharges? you don't just add all the numbers up together right?

asked by Anonymous on November 2, 2015
64. ## chemistry

I am supposed to add NH4 and C2H3O2 together and write the new ion. Would it be NH7C2O2? do I add the hydrogens together and were would it go in the order then?

asked by Melissa on February 5, 2013
65. ## Math

Fared wants to add 1/4 + 5/8. Add the fractiins by using a giant ine to create a common denominator. Does anyone have an answer if you do Thank You- Sutton

asked by Sutton on August 17, 2017
66. ## Biology

You are supposed to add 0.1 mol of a substance with molecular weight = 354.9 to 1 liter of water. How much should you add? Choose one.

asked by Leanna on October 20, 2011
67. ## Chem

I did an experiment for creating an ester. So basically I added an acid to an alcohol. We were to also add H2SO4 solution. Why did we add that?

asked by Lena on March 25, 2009
68. ## Math

On a die, the top and bottom numbers always add up to 7. What are the three pairs that each add up to?

asked by Lauren on February 9, 2011
69. ## English

asked by Jessica on February 24, 2011
70. ## Math

When You Add Fractions You Just Add Numerators And Denominators. true Or False

asked by Zhanise on April 4, 2013
71. ## math

1/3+5/12+4/5= how do I break this down to add it? 1/3 5/12 4/5 find a common denominator, which for example, would be 60. 1/3= 20/60 5/12= 25/60 4/5= 48/60 then add the numerators. 20/60 + 25/60 + 48/60 = ?

asked by patti help on March 2, 2007
72. ## Math

Can anyone explain to me how to add fractions with different denominators? I can convert them to decimals, but i need to know how to add them. Anyone?

asked by Antagonist&Protagonist on April 6, 2009
73. ## algebra

When you add two numbers with exponets, say 2x^3+5x^6, do you multiply the exponents or add them? thank you-Alissa.

asked by Alissa on September 16, 2009
74. ## math

how to add frecions ? Do you mean fractions? if so you have to add the numerators and keep the same denominator. For ex. 2 over 5 + 2 over 5 = 4 over 5 what are you talking about sorry

asked by is on January 18, 2007
75. ## Decimal division

2 /25 = .08 why we add 0 with decimal, in some questions we don't add 0. Plz explain .

asked by Shan on August 21, 2012
76. ## math

Which steps could be used to solve this story problem? Blake took flyers to the shopping center to advertise his car wash event. By the time he arrived 14 of the flyers had blown away. He ended up putting 50 flyers on blue cars, 26 flyers on white cars,

asked by isaiah on March 10, 2019
77. ## health

What is a neoplasm? A. Another word for a malignant tumor B. A type of carcinoma that grows only in the mouth C. Any new and abnormal growth D. A benign swelling of epithelial cells I think the answer is (A) is this correct? neoplasm (NEE-oh-PLA-zum) An

asked by Kimberly on May 14, 2009
78. ## Math

asked by Connor model 313 248 317-51 on February 27, 2019
79. ## Chemistry

Calculate the amount of 6 M nitric acid you need to add to fully react with .5 grams of copper and add a 20 percent excess.

asked by Jennifer on September 11, 2011
80. ## Chemistry

How to Prepare 500mL a 50 mM pH 6 Citrate buffer starting from citric acid as the sole source of conjugate base I used the HH equation and got that citric acid concentration would be 0.035M, when converted to moles would be 3.362g. Then I was planning to

asked by Aarya Singh on January 15, 2017
81. ## Chemistry

Could someone answer this question so I understand it. Thanks In general, the most elegant way to add one carbon with an OH on it to a primary alkyl halide is to: a) convert the alkyl halide to a Grignard and add formaldehyde followed by H3O. b)convert the

asked by Jules on April 12, 2011
82. ## Social Studies 7R - Extra Credit Project

I'm making a small poster about my culture. What should I add to it???? Any important things I should add??? This is a extra credit project for Social Studies.

asked by Lauren on December 29, 2011
83. ## math

An item costs \$39.95. Add 7% to the price for tax. Then add \$5 for shipping and handling. Write an expression using these numbers that indicates the total cost. Please help me! Thanks!

asked by nicole g on February 9, 2010
84. ## math

input x 1 2 4 5 6 8 9 output Y 7 9 13 _ _ _ _ I have tried all ways add 6 plus 1 x4 plus 1 add 7 nothing works

asked by Sam on October 25, 2010
85. ## Pattern

Can someone help me find the pattern and the next 3 numbers in the pattern? 10,1,6,6,11 I would think the next numbers would be 2, 7, 7, 12 But why? The difference between 10 and 1 is 9. The difference between 1 and 6 is 5. So , if you restart the pattern

asked by Kim on January 9, 2007
86. ## algebra 2

a bag of fertilizer claims that it will cover 5000 square feet of grass if you front yard is 1450- feet wide and 65 feet deep and you back yard is 150 feet wide and 225 feet deep how many bags of fertilizer will you nee to fertilize your entire back yard?

asked by jordyn on September 6, 2013
87. ## Chemistry

Describe in detail how you would make one molar solution of sodium chloride. Do I add the atomic masses of Na and Cl and then find the mols? And the after that you would just add 1L of water, correct?

asked by ~Brittney~ on August 28, 2007
88. ## URGENT MATHS

I got 2 questions and I've been stuck on them for days and its due in 2 days. 1. For a quick way of doing multiplication, you can do: for example: 81 x 89=? First you do 1x9=9 in which case you have to add '0' in front of it to make it 09. Then you add 1

asked by Sindy on February 1, 2008
89. ## English

After the basketball game the students had a dance at the school. . How should the sentence be correctly punctuated? A) Add a comma after game. B) Add a comma after dance. Reactivate C) Change the period to a question mark. Reactivate D) Add an apostrophe

asked by Marc on March 11, 2016
90. ## Physical Science

HELP WITH THESE PLEASE! If you ride your bike at an average speed of 4km/h and nee to travel a total distance of 28 km, how long will it take you to reach your destination? A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic

asked by Audriana on August 7, 2013
91. ## algebra 2

(3x power over 2-7x+11)+(6x power over 2+9x-81)= i know i supposed to add this but that's all i dunno what to add and not to add

asked by at on June 13, 2010
92. ## Chemistry

I posted before about designing a procedure to determine two unknowns (1 solid, 1 solution). The possible solutions were: NaCl, CaCl2, CuSO4, NaOH,Ba(OH)2, HCl, HNO3, or H2O. The reagents given are: NaOH, HCl, AgNO3, Zn metal, Na2SO4, and H2O. The

asked by Raj on November 11, 2007
93. ## Eng

Which of the following would be an appropriate way to add variety to your sentence? A. Make your sentences read like a spoken conversation. B. Use more close-up words. C. Use questions and answers together. D. Add personal anecdotes. Answer is C

asked by Jen on June 25, 2013
94. ## suffixes

How do I know i add the suffixes is right.Ex:light add ;er or est

asked by Thanh on September 14, 2009
95. ## Chemistry

Please help me with the questions at the end of this chemistry lab.Thank you for any help you can provide. 1. This experiment requires you to do 7 trials with varying amounts of Na©üCO©ý. 2. Take a clean 50 mL beaker from the Glassware shelf and place

asked by Tony on January 19, 2012
96. ## algebra

how do I do this Solve for x. 3x – 2y = 6 Add 2y to both sides and then divide both sides by 3, to give you just "x' on the left side. so is this how i work it out 3x-2y=6 3x- 2y= 6 -2y 3x=6-2y x= 2 +2y No. Add 2y to both sides. 3x- 2y+2y= 6 +2y 3x=6+2y

asked by help on April 28, 2007
97. ## Stoichiometery

1. This experiment requires you to do 7 trials with varying amounts of Na©üCO©ý. 2. Take a clean 50 mL beaker from the Glassware shelf and place it on the workbench. This is beaker # 1. 3. Take a balance from the Tools shelf and drop it on the beaker.

asked by Anonymous on January 19, 2012
98. ## english

Which one of the following statements is true for the base forms of verb? A. when the subject of a sentence is singular, add "-s" to the base form. B. Add "to" to the base form to create an adjective. C.Do not use a base form with plural subjects. D.Add

asked by amanda on October 14, 2012
99. ## math 6 rule pattern

The same rule is used on each of these number column A to get the numbers in Column B. COlumn A B -3 -5 0 1 3 3 6 13 Which could be the rule? Multiply by 2, then add 1 add 1 Subtract 2 Multiply by 3, then add 4 I picked that last one, But I know I am

asked by moby on May 21, 2014
100. ## chemistry

How would you prepare 3.5 L of a 0.9M solution of KCl? A. Add 23 g of KCl to a 3.5 L container; then add enough water to dissolve the KCl and fill the container to the 3.5 L mark. B. Add 233 g of KCl to a 3.5 L container; then add enough water to dissolve

asked by donna on June 13, 2016