# Lou

Popular questions and responses by Lou
1. ## chem

Does baking soda and vinegar have a complete ionic equation? HC2H3O2 (aq) + NaHCO3 ===> NaC2H3O2(aq) + H2CO3(aq)----->H2O(l)+CO2(g)+2H2O(l)

2. ## Statistics

In the United States, 43% of people wear a seat belt while driving. If two people are chosen at random, what is the probability that both of them wear a seat belt?

3. ## chemistry - crude product

WHAT IS THE CRUDE PRODUCT IN RECRYSTALLIZATION?

4. ## Algebra

A car rental agency charges ​\$175 per week plus ​\$0.2 per mile to rent a car. How many miles can you travel in one week for \$355 question mark

5. ## chem

The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. 1. Compute the experimental percent by mass of copper in the sample: 1.1664/1.998x 100=71.81% 2. Calculate the percent copper in pure copper sulfate

6. ## physics

A kayaker paddles at 4.0 m/s in a direction 30° south of west. He then turns and paddles at 3.7 m/s in a direction 20° west of south. I know the formulas but having trouble figuring out the degree of angle. Ax=4(cos30)= 3.4641 Ay=4(sin30)= 2

7. ## Social Studies

What was one reason for Genghis Khan’s success as a military leader? A. He ruthlessly destroyed all Mongol clans except his own. B. He organized the Mongolian army into an efficient fighting force. C. He built goodwill by treating conquered peoples with

8. ## complex numbers

find the values of x and y x+5i=y+yi

9. ## organic chem

when di-n butyl ether and hot concentrated naoh react----> nor rxn .. why? when di n butyl ether reacts with na metal---> nor reaction .. why?

Given a population comprised of 30 bats, 15 gloves, and 60 balls, if sampling is random and one at a rime without replacement, what is the probability of obtaining a bat, a glove, and a bat in that order if three objects are sampled from the population?

11. ## Biology

For a male and female bison that are both heterozygous for normal skin pigmentation to produce an albino offspring.... 1. What are genotype of parents (A= normal skin, a=albino) AA x AA Aa x Aa * aa x aa 2. what are possible genotypes of offspring? Aa only

12. ## Social Studies

Which represents a unique achievement of Kush's Civilization? a. Meroitic script b. hieroglyphics c. papyrus*** d. preparation for the afterlife How did the region's geography affect Kush? a. The Nile's contracts made it difficult to travel by boat b. The

13. ## Writing Skills

Sentence (i) has been shortened in sentence (ii) by using a(n) _______. (i) She likes a location that is in the sun. (ii) She likes a sunny location. A. prefix C. phrase B. adjective D. connective

14. ## chem

The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. Calculate the percent copper in pure copper sulfate pentahydrate(this is the theoretical percent copper). One mole of copper has a mass of 63.55 g, and by

15. ## Trigonemtry

The sun is 25° above the horizon. Find the length of a shadow cast by a building that is 100 feet tall (see figure). (Round your answer to two decimal places.)

16. ## Chemistry

Write a balanced equation: Aluminum reacts with aqueous hydrochloric acid to form hydrogen gas and aqueous aluminum chloride. I think: Al+HCl(aq)-->H(g)AlCl(aq) But I don't really know if I am doing it right or not

17. ## algebra

Paula leaves home driving 40 miles/hr. One hour later Dan leaves home driving in the same direction at the rate of 50 miles/hr. How long will it take dan to catch up with Paula?

18. ## word

I know the word is pronounced fesod, but I do not know how to spell it. Can someone please tell me how to spell it?

19. ## CDA

I need two resources designed to assist teachers in constructively dealing with children with challenging behaviors(such as aggressive behavior like hitting or biting, or shyness)

20. ## Social Studies

What factors made the Tang capital of Chang'an a center of culture and trade? Select all that apply. A. It welcomed foreigners and their beliefs. B. It based its trade on the merit system. C. It was the center of silk production. D. It was located at one

21. ## Math

The froghopper holds the world record for insect jumps. It can leap at an angle of 45.0° at a speed of 1.0 m/s. (a) Find the velocity (magnitude) at t = 1.0 seconds. (b) Find the position at t=1.0 seconds.

22. ## Social Studies

Prior to the destruction of the Second Temple, which of the following areas in the world contained diaspora communities? a.) Central Aisa b.) Great Britain c.) Japan d.) Southern Africa

23. ## Social Studies - Religion

Identify which of the following are key teachings of Judaism. Select all that apply. a.) Righteousness b.) Observe the Sabbath c.) Love your neighbor d.) Slavery is forbidden e.) Do not make war My answers - C, A, E If someone could tell me if my answers

24. ## Social Studies - Religion

What are the three parts of the Hebrew Bible? a.) Torah, Prophets, Writings b.) Poems, Torah, Laws c.) Talmud, Torah, Poems d.) Prophets, Talmud, Psalms My answer - B Can someone tell me if I am right?

25. ## History

The rule of law, established by Hammurabi, was the idea that a.) different laws apply to people of different social ranking b.) all members of society, even the rich and powerful, must obey the law c.) there is no difference between civil and criminal law

26. ## AP CHEMISTRY

The equilibrium constant for the reaction PCl3(g) + Cl2(g) ⇀↽ PCl5(g) is 35000 at 760 ◦C. At equilibrium, the partial pressure of PCl5 was 150 bar and that of PCl3 was 8.12 bar. Calculate the equilibrium partial pressure of Cl2. Answer in units of

27. ## english

unscramble 14 letters into 3 words

28. ## Chemistry

How does the presence of HCl affect the charges on weak complexes?

29. ## statistics

construct a 95% confidence interval estimate for the population mean MPG of 2010 family sedans, assuming a normal distribution.

30. ## Chemistry

If a plant has 88.0 g carbon dioxide and 64.0g water available for photosynthesis determine: a the limiting reactant b. the excess reactant and the mass in excess c. the mass of glucose produced

31. ## physics

a great amount of water vapor changes phase to become liquid water droplets in the clouds that form a thunder storm. Does this phase change release or absorb energy?

32. ## chem

Does anyone know what graph you would obtain if the fractional distillation had been a complete separation of pure toluene or pure cyclohexane?

33. ## Math

A plumber makes \$4.50 per hour more than his apprentice. During an 8-hour day, their combined earnings total \$372. How much does each make per hour? (hint: if you decide to use cents instead of dollars,then use 450 cents per hour and 37200 cents total

34. ## Math

Brian O'Reily earns twice as much each week as a tutor than he does pumping gas. His total weekly wages are \$150 more than that of his younger sister. She earns one quarter as much as Brian does as a tutor. How much does Brian earn as a tutor?

35. ## Chemistry

Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes if a solution that contained dissolved NaF and a solution NaCl. Would you expect a reaction, if Si write the balanced chemical equation

36. ## Math

What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

37. ## bilogy(genetics

given the following genotypes GgWwTt and GgWWtt. what is the probability of producing an offspring with the following genotype? How do i solve this problem?

38. ## chem

How do I calculate ratio of volume of base to volume of acid . Ex) phenolphthalein: Acid:20mL Base 30mL

39. ## English-- Analogies

1. perfunctory : Punctilious :: A. kindly : gently B. avoid : detect C. practical : Feasible D. Perdition : salvation 2. Perspicacity : Mind :: A. reason : excuse B. attorney : trial C. sharpness : blade D. rainstorm : spring

40. ## chemistry

I wanted to know that in a chemical reaction are the products part of the system or surrounding?

41. ## history

I need help with my homework assignment. Assignment: tell us about this ongoing right abuse and violation of international law. Unfortunately, I was not able to find anything. Please help as soon as possible. Thank you

42. ## science

5. a baseball and a golf ball have the same momentum. which has greater kinetic engergy? -the golf ball because of the greater velocity 12. you have a choice of catching a baseball or a bowling ball, both with the same KE. which is safe? -catching the

43. ## Language arts

1. Which of the following passages from the novel best illustrates the most extreme hostility between the Chinese and American communities in San Francisco? A: An American man raises his voice when he suspects Windrider and Moon Shadow do not understand

44. ## Math

You have 7L feet of fence to make a rectangular vegetable garden alongside the wall of your house, where L is a positive constant. The wall of the house bounds one side of the vegetable garden. What is the largest possible area for the vegetable garden?

45. ## Science

After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap, in the geological record? a. an earthquake or motion along a fault b. new sediment deposits build up on the eroded area c. radioactive decay along a fault

46. ## Science

What does the law about superposition tell you about the relative ages of rocks? a. that the deeper you go into rock layers, the older the rocks are b. that the deeper you go into rock layers, the younger the rocks are*** c. that the oldest rock layer is

47. ## Social Studies

Although southern Mesopotamia is a hot, desert region, why was it able to become the cradle of civilizations? A. Nomads developed aggressive herding techniques B. Flooding of the Tigris and Euphrates river brought good soil C. Farmers developed technology

48. ## physic

"If you have an inductor that is connected to a 36v, 400 Hz circuit with a current of .2 A, what is the inductance of the inductor?"

49. ## physics

"If you have an inductor that has an inductive reactance of 125 ohms, on a 60Hz frequency, what would be the inductance in henry's?"

50. ## PreAlegebra

The club was given materials to build 160 feet of fence. If they used the auditorium wall for one side of their garden, what size rectangle should they make to have the largest area? If w represents the width of the rectangle and is perpendicular to the

51. ## math

how you arrange the following to ascending order 8/7, 8/3, 8/4, 8/8

52. ## Art

what national values were the Japanese likely trying to convey by including a portrait of famous philosophers Yukichi Fukuzawa on the following pieve of currency? A. wisdom and education ** B. power and prosperity C. strength and indurance D. peace and

53. ## argosy

Cory has a collection of nickels, dime and quarters with a total value of 2.55. There are 6 more dimes than nickels and twice as many quarters as nickels. How many of each coin is in her collection?

54. ## Math Word Problem

Can someone please check this one, this is a word problem, not a greater than or less question. How much greater than -10.4 is -6.52? -10.4 - -6.52 = -3.88 is this correct?

55. ## Math

I need help with this: 0 x -8 (it is 0 multiplied by negative 8) The answer is came up with is 0 is this correct?

56. ## Algebra 2

Does this verbal phrase translate into the algebraic expression correctly? The quotient of seven times a number and three (7x) / 3

57. ## Calculus

Let f(x) be the function f(x)={x2−c for x

58. ## physics

a 22 kilo ohm resistor having a tolerance of 10% has failed. you have on hand five resistors, valued at 120, 220, 47, 33 and 120 kilo ohm respectively. what combination of these would you choose to connect in parallel to replace the failed component?

59. ## algebra

how can you write a proportion that solves a problem in real life? can someone give me some ideas please?

60. ## algebra

evaluate the expression when x = 10, y = -2 and z = -5 x/y= _____

61. ## biology

How do changes in the nucleotide sequence lead to mutations and how could this affect the primary structure of proteins?

62. ## math

Find the maturity value on a loan of 10,500 @ 8 1/2% interest for 18 years using the MV=P+I

63. ## physics

explain why we sweat when it is hot? How does it help us? In terms of heat and temperature what happens

64. ## math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x2 + 2x + 2.

65. ## math

solve for d if ddd base 5 = 124

66. ## Marketing

Are investment spending market tests a good strategy or a waste of time and overly cautious? I'm working on a case study and I'm having trouble picking a side to argue. The instructor wants us to decide how promotion money should be allocated in the case.

67. ## marketing

I'm working on a case study and I'm having trouble picking a side to argue. The question is, Is the investment spending market test a good strategy or a waste of time and overly cautious? The instructor wants us to decide how promotion money should be

68. ## algebra

how do i figure: (-12a^2b^6)^3 over (9a^3b^9)^3

Late payment of medical claims can add to the cost of health care. An article (M. Freudenheim, “The Check Is Not in the Mail,” The New York Times, May 25, 2006, pp. C1, C6) reported that for one insurance company, 85.1% of the claims were paid in full

70. ## statistics

a. Compute the mean, median, and mode. b. Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c. Are the data skewed? If so, how? d. Based on the results of (a) through (c), what

1.21 Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business (M. W. Ford, D. W. Kent, and S. Devoto, “Learning from the Pros: Influence of Web-Based Expert Commentary on Vicarious

1.21 Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business (M. W. Ford, D. W. Kent, and S. Devoto, “Learning from the Pros: Influence of Web-Based Expert Commentary on Vicarious

1.21 Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business (M. W. Ford, D. W. Kent, and S. Devoto, “Learning from the Pros: Influence of Web-Based Expert Commentary on Vicarious

74. ## simple interest

if i deposit 3,500 dollars at and intrest rate of 71/2% per year for 5 years what would my interest amount be?

75. ## macroeconomics

Referring to the table in question 10, suppose improvement occurs in the technology of producing forklifts but not in the technology of producing automobiles. Draw the new production possibilities curve. Now assume that a technological advance occurs in

76. ## Honors Chemistry

An aqueous solution of NaCl has a concentration of .500 M. 35.0 mL of this solution is allowed to evaporate to a volume of 20.0 mL. a) Is the solution more concentrated or more dilute afterwards? b) What is the new concentration of the solution?

77. ## Theory

If an experiment doesn't agree with the the theory, then this means that the theory is incorrect? please give explain why or why not

78. ## Socials

I have no idea how to answer this. Write a paragraph from Macdonald's point of view defending the decision you have made. Keep in mind your desire to look good politically and personally in your quest to get re-elected. What decision did Macdonald make??

79. ## physics

Calculate the weight (in English units) of a 2300 kg tiger.

80. ## gender roles

what are characteristics and behaviors that are associated with being male and female in or society?

81. ## horizontal displacement physics

how do we find horizontal displacement in physics?

82. ## english-personal growth

what is a personal growth paper?

83. ## chem (significant figures)

what are the errors in the measured values g=9.910 m/s^2 amd 9.805? true value 9.797 for 9.910 i got 0.113 and for 9.805 i got 0.008. i know i need for significant figures but i got three in my answer. so what do i do?

84. ## math(significant figures)

A pipe is measured once with a steel tape with markings every .1mm.The two ends of the pipe line up with the 0 and 40-m marks onthe tape. How should this datum be recorded using theappropriate number of significant figures? exolain how you figured it out

85. ## chem

the RDA of the amino acid lysine is 12 mg per kg of body weight. How many grams per day should a 77.0 kg adult receive?

86. ## ochem

In a sn2 reaction why do we need sp3 hybrid orbital and not sp2 for the substrate

87. ## history

What are three myths about the New World and the Indians (Virgin land, inferior, Noble savage)

88. ## mecs101

discuss a modern middle eastern country's attempt to either codify or replace shariah law.

89. ## middle east culture

what are some of the different ways that the shariah can be interpreted and applied to modern society?

90. ## mecs

compare the formation of Islamic law to what you know of development of Western legal sytems?

91. ## mecs 101

How has Islamic law attempted to adapt to modernity?

92. ## basic chemistry

a substance that cannot be broken down into susbtances by ordinary chemical means is

93. ## chem

why doesanhydrous hydrogen bromide add to 1-pentene to afford a racemic mixture of. 2-bromopentane, and not 1-bromopentane.

94. ## Math

The market trades in three fixed-income securities: A, B, and C. Security A is a 2-year bond paying 40 at date 1 and 80 at date 2. Security B is a 1-year bond paying 50 at date 1. Security C pays 30 at date 1 and 40 at date 2. Prices are pa=100, pb=45 and

95. ## physics

what is the average velocity of a vehicle that uniformly accelerates from rest to 38 fps?

96. ## calculus

A bicyclist is riding on a path modeled by the function f(x) = 0.03x, where x and f(x) are measured in miles. Find the rate of change of elevation when x = 3.

97. ## Math

For this problem, I need help creating a chart for this: Brian O'Reily earns twice as much each week as a tutor than he does pumping gas. His total weekly wages are \$150 more than that of his younger sister. She earns one quarter as much as Brian does as a

98. ## Algebra

The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. Find the numbers.

99. ## Calculus

Find the distance traveled in 45 seconds by an object traveling at a velocity of v(t) = 20 + 2cos(t) feet per second.