# How do I do this problem? 1. A student did an alkalinity determination correctly, except that the sample titrated had a volume of 90.0 mL. Volume A was found to be 4.50 mL and Volume B was 7.00 mL. a)

32,716 results
1. ## Chemistry

A BS Medical Technology student was asked to determine the molecular weight of a diprotic acid using acid-base titration. This student performed four trials. Firstly, the student used potassium hydrogen phthalate (KHP, 204.22 g/mol) as standard to

2. ## Math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the cost, c, for a particular number of student tickets, s, purchased. Identify the independent and dependent variables.

3. ## Math for Steve

1. Identify the part, whole, and percent in the following statement: Find 15% of 750. a. part = 750, whole = n, percent = 15 b. part = 15, whole = 750, percent = p c. part = n, whole = 750, percent = 15 d. none of these 2. Write a percent equation that can

4. ## Math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the cost, c, for a particular number of student tickets, s, purchased. Identify the independent and dependent variables. i dont understand what i am suppose to

5. ## Statiatics

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly?

6. ## statistics

A multiple choice exam has 20 questions; there are four choices for each question. A student guesses the answer to every question. Find the chance that he guesses correctly between four and seven times. Find the minimum score the instructor can set so that

7. ## math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the cost, c, for a particular number of student tickets, s, purchased. Identify the independent and dependent variables.

8. ## Chemistry check

Could someone please just check my answers for this? I want to make sure I did these right. 1. A student reported the mass of ten glass beads as 2.507 +/- 0.015 g. What should the student report as the mass of one bead? Explain your answer. A: The student

9. ## Science

A student tried to solve the following problem by selecting the conversion below. What, if anything, did the student do wrong? How many moles of AgNO3 are needed to produce 6.75 moles of copper (II) nitrate Cu(NO3)2 upon reacting with excess copper (Cu)?

10. ## Chemistry

A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility the student decides to use benzene as the solvent. After crystallization, the crystals are

11. ## statistics

a test consists of true/false questions .to pass the test a student must answer at least 6questions correctly .if a student guesses on each question,what is the probability that the student will pass the test

12. ## Chemistry

SOMEBODY PLEASE HELP ME! This is my last question for the chemistry and thank you. :D A BS Medical Technology student was asked to determine the molecular weight of a diprotic acid using acid-base titration. This student performed four trials. Firstly, the

13. ## Statistics

Over time, a student analyzes her ability to guess correctly after narrowing down multiple choice answers in a 5-selection question (a through e). She discovers that if she narrows her answers to 2 or 3 choices, her probability of getting the right answer

14. ## Chemistry

After a Melting point determination, why can't you re-use the solidified substance and capllary tube for subsequent determination?

15. ## Math

the cost of a student ticket to the schools play is \$7. write an equation that correctly relates the cost,c,for particular number of student tickets,s,purchased indetify the independent and dependent variables (3 Points) Please help

16. ## Math

A student experiences difficulty with malfunctioning alarm clocks. Instead of using one alarm clock, he decides to use three. What is the probability that at least one alarm clock works correctly if each individual alarm clock has a 90% chance of working

17. ## plz help math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the total cost, c, for a particular number, s, of student tickets purchased. Identify the independent and dependent variables.

18. ## Statistics

1)A quiz consists of 8 multiple choice questions, each with 5 possible answers. If random guesses are made for all 8 questions, find the probability that a student will answer exactly 5 correctly. A. 0.999 B. 0.009 C. 0.990 D. There is not enough

19. ## Stats

A student takes a 32 question multiple choice exam but did not study and randomly guesses each answer. Each question has three possible choices for the answer. Find the probability that the student guesses more than 75% of the questions correctly. (Round

20. ## chemistry

Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is

21. ## chemistry

1. A student reported the mass of 10 glass beads as 2.507 +- 0.015g. What should the student report as the mass of one bead? Explain your answer 2. A student reported the density of 10 glass beads as 2.05 +- .034 g mL^-1. What should the student report as

22. ## AP Chemistry

1. If alum is heated at first too strongly causing it to splatter out of the crucible what effect will this have on the determination of the water hydration? 2. If alum is heated insufficiently what effect will this have on the determination of the water

23. ## Science (Chemistry) (Measurement Uncertainty)

Three students are asked to determine the mass of a coin. They each measure different values for the mass of the coin using a balance. Student A recorded a mass of 63.08g, student B recorded a mass of 63.022g and student C recorded a mass of 63.0328g. If

24. ## chemistry

Calculate the "exact" alkalinity of a water that contains 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66.

25. ## chemistry

100 ml of a raw water sample on titration with 1/50N h2so4 required 12ml of the acid to phenolpthalein end-point and 15.5 ml of the acid to methyl orange end point. determine the type and extent of alkalinity present in the water sample. please explain me

26. ## college chemistry

a student did an alkalinity determination correctly,except that the sample titrated had a volume of 90.0 mL. Volume A was found to be 4.50 mL and Volume B was 7.00 mL. 1)Calculate the Alkalinity value from these data and then calculate the correct

27. ## Math

10 multiple choice questions each with three possible answers only one of which is correct. A student guesses the answer to every question. (a)What is the probability that the student will answer the first six questions correctly and the rest incorrectly?

28. ## Chemistry

student perform 2 melting point determinations on a crystalline product. In one determination, the tube contained a sample 1 - 2 mm in height, and the melting point was 141 - 142 ¢ªC. In the second determination, the sample hight was 4 - 5 mm and the

29. ## science

A student makes the following statement: Chocolate- covered donuts are 10 times better than plain, glazed donuts. Which of the following correctly describes the student’s statement? a-The student’s statement is a quantitative observation. b-The

30. ## Math Statistic

A student randomly guessed the answers to a five question true/false test (there is a 50% chance of guessing correctly on each question). Find. 1. the probability that the student answers more than 1 question correctly 2. the expected number of correct

31. ## statistics

A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. Assume the student

32. ## Math - Please Help Check My Answer

Please help me with the following question: A student attempts to solve for c in the equation below. Which statement best applies to the work shown below? 3c + 6 - 4c - 12c = 7 -13c + 6 = 7 -13c + 6 + (-6) = 7 + (-6) -13c = 1 c = -1/13 A. The student

33. ## Language Arts

I have these discussion questions on connexus and I have no idea how to answer them, can u help? Here's what it says: Do We Need Words to Communicate Well? In this discussion, you will post comments related to determination and communication. Refer to the

34. ## Math

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question

35. ## Chemistry

ok.. im confused: Ammonia and oxygen react in the equation: 4NH³+5O²--> 4NO+6H²O. When 2.4 mol of NH³ are present, the reaction yields ____ mol of O². i have no clue how ot do this! Look at your problem to make sure it is posted correctly. NH3 REACTS

36. ## Chemistry

3. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? The CO2 in the distilled water will create a more acidic solution which will affct the determination of NaOH solution's concentration?

37. ## MATH

a pizza pie with 15 slices was shared too p student so that each student share in 3 slice how many student shared the pie (word problem involving fraction)

38. ## science

A student sets up an experiment to show how convection affects ocean currents. The student fills a glass tray with water, places the arrangement on a stand until the water is still, and lights a candle below the center of the tray. Using an eye dropper,

39. ## math

a student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?

40. ## Chemistry

How do I do this problem? 1. A student did an alkalinity determination correctly, except that the sample titrated had a volume of 90.0 mL. Volume A was found to be 4.50 mL and Volume B was 7.00 mL. a) Calculate the alkalinity value from these data and then

41. ## Chemistry

Can someone check my answers? Thanks. 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you collect your samples on the same day and do the alkalinity tests within 24 hours? Acid

42. ## Chemistry check

Can someone check my answers? Thanks. 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you collect your samples on the same day and do the alkalinity tests within 24 hours? Acid

43. ## Chem

Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

44. ## Chem

Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

45. ## Chemistry

In an experiment we have 4 liters of AlAin water in contain or A , and 2 liters of dubai water in contain out B . The alkalinity of water in container A and the alkalinity of water in container B are 50 and 150mg/l as caco3 ,,respectively the alkalinity of

46. ## Chemistry URGENT/DR BOB

Hello DR. BOB, the correct value in the problem posted at 1:17pm regarding Student A and Student B accuracy and random error is the: MEAN of 2.63 g/mL. Could you take a look back at that post and let me know if i answered 2 and 3 correctly.

47. ## Chemistry (3rd time I've posted this)

Can someone check my answers? I've posted this a couple times and no one has responded. Is no one responding because they're all right or what? 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be

48. ## MATH

in a contest, Bello. Adamu, and Lawi are asked to solve a mathematical problem. the probability that they solve the problem correctly are 1/5, 2/3, and 2/5. find the probability that:(1)None of them solve the problem correctly(2)At least one of them solve

49. ## math

1. Is this student's work correct? ( 9 x 10^3 ) ( 5 x 10^2 ) = ( 9 x 5 ) ( 10^3 x 10^2 ) = 45 x 10^3+2 = 45 x 10^5 A. Yes. The student rewrote the problem and then multiplied correctly. *** B. No. The student should have changed the scientific notation to

50. ## organic chemistry

recrystallization question: a student's correctly calculated value for the % recovery of purified unknown solid was 102%. assume that the student performed all steps of procedure correctly. a) comment on the validity of the result (include reasons). b)

51. ## organic chem

A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment was 102%. Assume that the student performed all steps of the procedure correctly a) comment of the validity of this result;

52. ## Physics

What is the purpose of the Biosignature Drake Equation? A) Determination of the number of civilization in the solar neighborhood B) Determination of the number of civilization in the Milky Way galaxy C) Determination of the number of civilization in the

53. ## mat 115 week 8

Please help me with this math problem. I don't know if I am doing this correctly. -21 - (-9) __________ -21 - (-21) Am I correct in answering this problem correctly? -12 ____ = -12 0 If not can you help me with the right answer? Thanks kindly

54. ## comparing fractions

A third grade class was given a multiplication quiz. The quiz had 10 problems. Any correctly answered 6 problems, Bobby answered 7 problems correctly, Tom answered 9 problems correctly, and Sue only answered 2 problems correctly. A. What fraction of the

55. ## statistics

10. A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. Assume the student

56. ## To helper

Did you know that the best help you can give a student is NOT to do the problem for him, but to lead them to a solution. You can do this by example, or hints, or setting up the problem. Giving it away makes it worthless, and does not help the student

57. ## Statistics

A student studies for a statistics exam where all questions are true or false. A reputable source indicates that with studying the student has a 90% chance of answering each question correctly. There are only three questions on the test. What is the

58. ## Chemistry

How do you calculate alkalinity in chemistry? Ex: List the values for total alkalinity for Sample A and Sample B A 104 drops of titrant (5.25mL) 3 drops of C20 H14 O4 B 81 drops of titrant (4.25mL) 3 drops od C20 H14 O4

59. ## Chemistry

Sam Student calibrates a flask with water at 20C. Patricia Pupil borrows the flask and Sam's calculated volume for the flask, and uses it to do her unknown at 25 C. What, if any specific effect will this have on the results of Patricia's density

60. ## Chemistry 20

A student was experimentally checking the stoichiometry of a reaction. The student correctly predicted that the reaction should produce 1.82 g of al2(so4)3(s). When the student dried and weighed the al2(so4)3(s) produced, its mass was 1.94 g. The percent

61. ## Chemistry

After the melting point determination it is not advisable to use the used capillary with the solidified sample for a subsequent determination. Why?

62. ## Chemistry

After a melting point determination it is not advisable to use capillary the solidified sample for a subsequent determination. Why?

63. ## English

1. What are some constructive ways that people can communicate their determination to take an action or reach a goal? 2. Do people sometimes communicate their determination in ways that anger, frighten, annoy, or confuse others? How? 3. What are nonverbal

64. ## Organic Chemistry

A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student decides to use benzene as the solvent. After crystallization, the crystals are

65. ## math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the total cost, c, for a particular number, s, of student tickets purchased. Identify the independent and dependent variables.

66. ## English

determination that you need to do something.....(definition of) will --------------- What is the relationship between 'determination' and 'that you need to do something'? Are they in apposition?

67. ## Math

Could you help me with this problem? -2 5 Sorry couldn't type the problem correctly. The problem is 5 to the negative 2. I got 0.04 is the answer. Is this correct. Thank you.

68. ## Accelerated Math

The cost of a student ticket to the school play is \$7. Write an equation that correctly relates the total cost, c, for a particular number, s, of student tickets purchased. Identify the independent and dependent variables. (3 points)

69. ## english phonetics

Hello I was wondering if my answers for my phonetics assignment were correct... Articulatory - deal with manner and place of articulation of sounds pronunciation problem - the student pronounces "pale" instead of "fail" MANNER AND PLACE OF ARTICULATION?

70. ## statistics

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question

71. ## Research and Statistics

I want to ensure I've done this problem correctly. Thanks! 3. In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78

72. ## Chemistry

What are the Salts are taken into consideration in the calculation of the total alkalinity ????

73. ## Language

Let me introduce Javier Solas, who is running for president of the student council. As than Liu, last year's president, said " I can't imagine voting for anyone but Javier. He's clearly the best-qualified candidate. Nearly every other member of last year's

74. ## Calc

A student is in a 20 week calc class. The function f(t)=50-50e^0.2t f(t) measures the students problem speed in t weeks -how many problems per hour can a student solve at the beginning of the course - how many problems per hour can a student solve halfway

75. ## Math

A student is in a 20 week calc class. The function f(t)=50-50e^0.2t f(t) measures the students problem speed in t weeks -how many problems per hour can a student solve at the beginning of the course - how many problems per hour can a student solve halfway

76. ## Statistics

A student guesses blindly on a 20-question multiple choice test. If each question has 4 answer choices (only one of which is correct), what is the probability that the student will answer exactly 10 questions correctly?

77. ## Physics

For an outdoor lab experiment a car has a loud device attached to the roof. This device emits beeps with a pitch of 400 Hz. The device is set to constantly emit short beeps a rate of twice every second. The car drives at 25 m/s (About 55 mph) on a level

78. ## Statistics

If the slope of the regression line is negative and the correlation coefficient is -.5, coefficient of determination is: - It would be -0.25. Correlation coefficient = r and coefficient of determination = r^2. Then, coefficient of determination would be

79. ## Exam skills

Hello I'm a grade 10 student . I'm an A* student and have excellent knowledge. I raise my hand in class and teachers love the way i act maturally and how i get all questions right each time The problem with me is I get everything right in class but when it

80. ## math

Could you please assist me on how to work this problem? A student wrote 5 + 24+6=5 + 25 + 24 + 6 by the associative property. what error did the student make?

81. ## math

Could you please assist me on how to work this problem? A student wrote 5 + 24+6=5 + 25 + 24 + 6 by the associative property. what error did the student make?

82. ## math

Could you please assist me on how to work this problem? A student wrote 5 + 24+6=5 + 25 + 24 + 6 by the associative property. what error did the student make?

83. ## Math

I need help with the second question: A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? Answer is 1/5 What is the probability that

84. ## science

The student observes that the drops of food coloring at position X rise upward and disperse toward position Y, while at position Y, they sink to the bottom of the glass tray and move toward position X. Which statement correctly relates the student’s

85. ## MATH

A SCHOOL IS DIVIDED INTO 4 HOUSES P,Q,R,S. ON SPORTS DAY,STUDENTS LINE UP SO THAT A STUDENT FROM P IS FIRST IN LINE,THEN A STUDENT FROM Q THEN A STUDENT FROM R THEN A STUDENT FROM S THEN A STUDENT FROM P AND SO ON WITH SAME ORDER REPEATING .FROM WHAT HOUSE

86. ## math

a school is divided into 4 houses,P,Q,R and S.On sports day,the students line up so that a student from P is first in line,then a student from Q then a student from R then a student from S,then a student from P and so on with same order repeating.From what

87. ## chemistry

what is the clinical importance of doing the amino acid sequence determination Since this is not my area of expertise, I searched Google under the key words "amino acid sequence determination" to get these possible sources:

88. ## maths

The probability that Katarina will correctly solve a given Brilliant math problem is 1/8. The probability that Layla will solve the same problem correctly is 1/12. The probability that they will give the same incorrect numerical result is 1/1001. Suppose

89. ## Math

Mary is passing out school supplies to students in the class. She gives colored pencils to every second student, markers to every third student, and crayons to every fifth student. The second student received all three. Which student will be the next to

90. ## Math

A quiz contains three True/False questions. If a student attempts to answer the questions by guessing, what is the probability that the student will answer all three questions correctly ?

91. ## Accounting

I am having a technical problem using Simply Accounting 2008 (student version). I am creating my own company and entering the accounts in the Chart of Accounts. However, there is a problem with the drawings account. Most equity accounts have a credit

92. ## Accounting

I am having a technical problem using Simply Accounting 2008 (student version). I am creating my own company and entering the accounts in the Chart of Accounts. However, there is a problem with the drawings account. Most equity accounts have a credit

93. ## Calculus 2 (Series)

Can anyone help me start this problem from beginning to end, along with explanations on how to go about the problem for a better understanding how to do this series problem? 1) Find the values of p for which the series is convergent. Summation notation

94. ## Chemistry(Please check)

I need to calculate the valueof Kc for 5 test tubes for an experiment that I completed on determination of Kc. The equation used was Fe^3+ + SCN^-= FeSCN^2+ After creating an ice table for the first test tube my values for Fe and SCN were 6.5e-4M and for

95. ## Chemistry

I need to calculate the valueof Kc for 5 test tubes for an experiment that I completed on determination of Kc. The equation used was Fe^3+ + SCN^-= FeSCN^2+ After creating an ice table for the first test tube my values for Fe and SCN were 6.5e-4M and for

96. ## chem

if you were invoolved in an acid rain monitoring project with several other samplers,why would it be important that all of your samples on the same day and do the alkalinity tests within 24hrs

97. ## INTEGRAL CALCULUS PLEASE HELP!!!

If F(x)dx=1 from 1 to 25, F(x)dx=4 from 1 to 4, and F(x)dx=9 from 17 to 25, then: 1) What does F(x)dx from 9 to 17=? 2) What does (1F(x)-4)dx from 9 to 17x=? I have no idea how to do this problem and have been on it for hours! The problem is not typed

98. ## statistics

What is the probability a student answer at least 4 out of five questions correctly on a quiz? n=15, x>=4, p=.20, q=.80

99. ## social studies

Problem 1: How does Camella Entekhabifard feel about the Iranian Governement? Problem 2: What is Wahhabism? Where does it most influence? Problem 3: Where is the religious tension in South Asia? (Connexus Student btw these arent quiz or test problems just

100. ## stats

It is a multiple choice exam with 12 problems, each problem has 5 options. You need to answer 10 correctly to pass, what is the probability that by guessing you will answer at least 10 problems correctly?