1. chemistry

how do i write a net ionic equation for Lead (II) Nitrate and Sodium Carbonate react to form Lead Carbonate and Sodium Nitrate??

2. physics

A water slide is constructed so that swimmers, starting from rest at the top of the slide leave the end of the slide traveling horizontally. There is still a height between the surface of the water and the end of the slide. One person hits the water 5.00m

3. pre-cal... compound interest and modeling data

Please help me with these 2 problems! 1. Complete the table for the time t necessary for P dollars to triple if interest is compounded continuously at rate r. r= 2%, t=? r= 4%, t=? r= 6%. t=? r= 8%, t=? r= 10%, t=? r= 12%, t=? 2. Draw a scatter plot of the

4. Math Word Problem

Counting Chicken Wings At Annie's Home-Cooked Chicken Wings Restaurant, chicken wings are served by the bucket. The Biggest Bucket O'Wings is really big! Figure out how many wings are in the bucket. If the wings are removed two at a time, one wing will be

5. chemistry!

Indicate the type of intermolecular forces expected with each of the following compounds. H2 Li2CO3 LiOH C3H7OH choices include: Hydrogen Bonding,Ion-Molecule and vanDerWaals. help me! please!!!! im so stuck!

6. economics vocab.

Key terms: *frictional unemployment *seasonal unemployment *structural unemployment *cyclical unemployment *census *unemployment rate *full employment *underemployed *discouraged worker 1. My cousin Harold is used to ______________, since he works for a

7. chemistry-last one i swear

calculate the normality of Ca(OH)2 in a solution made by dissolving 4.75 g Ca(OH)2 in enough water to a make 250 mL of solution

8. physics

A horizontal plank (m = 2.0 kg, L = 1.0 m) is pivoted at one end. A spring. (k = 1.0 x 10. 3. N/m) is attached at the other end find the angular frequence for small oscillations?

9. physics!

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 40.0m/s. The bat does nonconservative W=70.0J on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0m above

10. compound interest

How do I solve these problems? Complete the table for a savings account in which interest is compounded continuously. 1. Initial Investment: \$1000 Annual % Rate: 3.5% Time to Double: ? Amount After 10 Years: ? 2. Initial Investment: \$750 Annual % Rate: ?

11. college math

A couple plan to have exactly three children. (a) Construct a tree diagram and list the sample space. (b) Find the probability that the family has at least two girls.

12. Math - Working with Logs!!

On September 26 2001, an earthquake in North Bay measured 5.0 on the Ritcher scale. What is the magnitude of an earthquake 3 times as intense as North Bay's earthquake? I would post my answer, but in text, it's just confusing and I can't post picture links

13. Chemistry - 1st Yr College Level

The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressures of oxygen: 0.20 atm of oxygen at one point and 0.0010 atm of oxygen

14. algebra

On Monday, Voltaire drove to town at 60 miles per hour. On Tuesday, he drove to town at 40 miles per hour. If the totaling traveling time for both trips was 15 hours, how far was it to town? I know distance=(rate)(time).so I set it up like

15. Chemistry

Which of the following molecules has polar bonds and is nonpolar? HF ICI3 NF3 SF4 BF3

16. Chemistry

Which of the following is a weak base HOCl LiOH Ba(OH)2 KOH NH3

17. PHYSICS!!!HELP£¡£¡

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 40.0m/s. The bat does nonconservative W=70.0J on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0m above

18. physics

Two blocks of mass m1 = 1.2 kg and m2 = 1.7 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.45. Calculate the speed of the blocks

19. English paper

Anti-!@#\$%^& feminist Andrea Dworkin suggests that !@#\$%^&ography is a new genre used by men to humiliate and subjugate women. Her essay “The New Terrorism” opens with rape and wife beating statistics committed against women by men in the United

20. pre-Algebra

Write the following as a fraction and show your work. 0.83 (the three is repeating) I don't know how to do it with only one of the numbers repeating and it is not in my book.

21. ALGEBRA

1, Factor each expression x^2 - 10x - 24 A. (x + 4)(x - 6) B. (x + 6)(x - 4) C. (x + 2)(x - 12) D. (x + 12)(x - 2) 2, x^2 - 36 = 0 A. (1 + square root of 3, 1 - square root of 3) B. (-6,6) C. No solution D. None of these 3, Factor each expression 49 x^9 -

22. Chemistry

Which if the following compounds is insoluble in water (NH4)2CO3 AgBr CuSO4 KI LiNO3 I thought it might be AgBr

23. US History

Describe Thomas Jefferson's view of the federal government and its responsibilities.

24. AP Chem

a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and collected over water. What volume of hydrogen sulfide gas would be collected at 32 degrees Celcius and 749 torr? The vapor pressure

25. Chemistry

All of the following are weak acids except HF H3PO4 H2SO4 HNO2 HC2H3O2

26. WRITING

What differences did you notice between your logical reasoning process and your moral reasoning process?

28. college math

A box of chocolates contains 20 identically shaped chocolates. Five of them are filled with jelly, three are filled with caramel, and twelve are filled with nuts. What is the probability that one chocolate chosen at random is filled with jelly, caramel, or

29. chemistry

2.5 moles of Cl2 reacts with a large excess of P4. The actual yield of PCl5 is 0.50 moles. What is the percent yield? P4(s) + 10 Cl2 (g)-> 4 PCl5 (g)

30. Optimization - Calculus

Find the point closest to the line sqroot(X+1) from the point (3,0). d = [(x - 3) + (y - 0)]^1/2 d = [(x - 3) + (y)]1/2 Do I now substitute in the equation y = sqroot(X+1) and solve?

31. Physics

An alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the object?

32. economics

Fill in the blanks. 1. Reason for unemployment: _____________________________ Type of uneployment: very low employment 2. Reason for unemployment: a healthy economy that is working properly Type of unemployment: _____________________________

33. Science

How does a raw banana relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering the

Can someone check my answers please. The formula for calculating the amount of money returned for an initial deposit into a bank account or CD (certificate of deposit) is given by A=P(a+r/n)^nt A is the amount of the return. P is the principal amount

35. Julia - Green's theorem

Sorry, I did not see your question ================================= Posted by julia on Monday, December 10, 2007 at 9:15pm. Can someone show me step by step how to work this problem out please. Let C be the triangle with vertices (0,0), (1,0), and (1,2).

36. Ethics

Asian Americans and Pacific Islanders are a model minority. Asian Americans and Pacific Islanders belong to a single “Asian American” culture.

37. physics

n alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the objec

38. Hearing Loss/Causes

I need notes on the category's of hearing loss and a persons DB Loss.

39. College Math

12 base 5 divide by 4021 base 5

40. Science/Biology

Pick the BEST answer: A)Which Of The Following Is An "Excitable Cell"? 1) Neuron 2) Electron 3) Hormone 4) Both 1 & 2 5) All Of The Above B)What Is The Popular Molecule That Energizes Many Activities In Cells? 1) Adenosine Triphosphate 2) Adenosine

41. microeconomics

how would you use principle of marginal analysis to make a decision.

42. Algebra 1

126a(-1/9a)(1/7a cubed) and the answer to this in my book says -2a to the fith. How does it work, i've tried multiple times.

43. English Expressions

1. Curiosity and concentration are important components in memorizing items. If you have a strong desire to learn and memorize, you can memorize it better. 2. Bisarre association is important. If you want to memorize two items together using association,

44. math

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees?

45. algebra

solve the following using substitution 8x-4y=16 y=2x-4 8x-4(2x-4)=16 8x-8x+16=16 0x+16=16 so what do i do now?

46. english

can someone explain how to use the word serenity in a sentence? examples please? Would you say someone is filled with serenity?

47. grammar

In the following sentences, what are the common and nouns? First sentence: Often on October outings, Otto offers oranges to officers. In this sentence I am confused by October. It seems like it should be a proper noun, but in a way it seems like it is

48. FINANCING

What are some areas or businesses, besides the government, where we may see value in cash accounting strategies? Incidentally, there is one country that does not use cash basis accounting. Does anyone know the country using accrual accounting methods?

49. math

is the answer to r2/3r-1/r-1/2 r7/6/r1

50. PreCalc

Solve the system by the addition method -10x^2 + 10y^2-320=0 30x^2 + 6y^2 - 336 = 0

51. math

simplify: (2x1/3y-2/3)6/(x-4y8)1/4

52. Microeconomics

Consider a competitive firm that produces tomatoes. The total fixed costs are \$10 and TVC is related to output according to the followin scheduele Quantity TVC 0 0 1 45 2 85 3 120 4 150 5 170 1)Compute ATC and MC 2) What is quantity if P=40 3)what is

53. Algbra I

how do i do a problem like this and other problems like this: Write an equation in point-slope form of the line that passes through the given point and has the given slope. (-8,-2) M=2

54. chem.

Hydrogen Chloride and Sodium Carbonate react to produce Hydrogen Carbonate and Chloride Sodium how do i write that in net ionic form?

55. math

can someone help me with this? find the next three terms? -100, -40, -16, -6.4,......

56. Never Mind

I'm just gonna call my friend, she's really good in math. THANKS FOR ALL THE HELP!!!

57. spanish

preocuparse darse prisa ok what do they mean and would i have to change them if i say like: por la manana no olvidarse de darle de comer al perro??

58. 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.

59. pre alg.

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use some help...

60. social studies

which web sites often have more dependable information than other sites?

61. math

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees This is my answer? Is this right?

62. Bobpursley for this question please, physics

I don't understand though why you can make w/mlambda I thought it was the otherway around? (in regards to this w/N sinTheta= m lambda N= w/(m lambda) * sinTheta N= w/(m lambda) * x/L

63. college math

How many different four-digit numbers can be formed from the digits 0 through 9 if the first digit must be even and cannot be zero?

64. english

ok i have to write a research essay on the viet cong but i don't no how..... plez help me today if u can thanks

66. Hearing Loss/Causes

If a deaf person HAS A DB loss of 76.1 for their right ear and a DB loss of 82.2 for their left ear than what is the persons DB loss? I don't understand how I would find the persons DB loss.

67. physics

describe the death of a massive star (10 solar masses)

68. physics

what is a black hole and how does a black hole form?

69. Physics

A wagon was used to move a 90 lb rock 120 yds. It took 40 sec and 70 lbs of force. Can someone help me solve for efficiency and horsepower????? PLEASE :)

70. physics

true or false: according to einstein, a gravitational field is equivalent to an accelerating frame of reference.

71. College Math

Express each decimal of integers, in simplest form. 0.1 with the repeating decimal 1

72. inflation

how does inflation affect each of the following? *fixed income *savings

73. math

simplify (4a4)-3/2/(b2)

74. sci275

considering the amount of energy required to produce animal based foods and goods, should humans change their habits so they consume products closer to the bottom of the food chain because it is more efficient?

75. englisg

who were the viet cong????????????????????????????????/

76. math

simplify r2/3r-1/r-1/2

77. math

express the following in form of a+bi: (5i)(-3/5i)

78. Chemistry

When an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate a precipitate forms a new salt is formed a gas is evolved an acid and base are formed no reaction occurs I either thought it was a precipitate forms or no

79. government

I need to compare/contrast the Illinois judicial branch to the national judicial branc and give at least three good similarities and three differences.

80. Chemistry

How many protons, neutrons, and electrons are in 24 +2 Mg 12 is it 12p, 14e- or 10 e?

81. sci

provide a descipitation and temperature for summer and winter. Then identify the characteristics of a plant and animal that is seen regularly in your region. How do the characteristics relate to the amount of rain or sunlight in your region.

82. Chemistry

how could I figure out which molecule has the stongest bond if I am given some such as HF AND HI.

83. Religion Research Paper

1. Considering that Hinduism lacks a uniting belief system, what makes up the Hindu religion? 2. What are the cultural and societal influences that have made Hinduism vital to the region in which it originates? 3. Explain the desire for liberation from

84. science

What is the importance of decomposers in the carbon cycle? Explain why nitrogen is important to organisms?

85. English- textual history

What does it mean to research a textual history of a work? i.e. Hamlet's textual history

86. math

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees? I really need an answer!!!!!!!

87. AP Chem

i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of gases Experiment: stick cotton ends of a Q-tip (one soaked in HCl and one in NH3) into either end of a drinking straw and

88. social studies

what is the difference between the kind of information presented by current newspapers and historic newspaper?

89. SCI 275

What are some alternatives to destroying tropical rain forests, which may be reducing nature’s ability to replace its species?

90. social studies

what does a search engine do?

91. Science

A wagon was used to move a 90 lb rock 120yds. It took 40 sec and 70 lbs of force to do this. Find horsepower and efficiency

92. algebra 1 :(

The height of a triangle is 8m less than the base. the area is 10m^2. Find the height and base. I really need help on just turning this word problem into an equation!

93. calc

find dy/dx when x = csc y

94. history

what are the main influences on central America & the Caribbean countries? a)Aztecs & Mayas b)ecotourism & communism c)the spice trade & shipping d)colonialism & slavery

95. une lab de physics

Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the

96. Chemistry

Which of the following indicates the exsistence of stron intermolecular forces of attraction in a liquid? a very low boiling point a very low vapor pressure a very low critical pressure a very low viscosity a very low heat of vaporization

97. College Algebra~Can someone check my answers pls

f(t)=log(t-5) t-5>0 t>5 g(x)=5e^x all real numbers g(x)=In(t+4) t+4>0 t>4 g(t)=5^t all real numbers

98. opinion question: ATM fees

Should banks be allowed to charge ATM fees? Why?

99. French

for summer...ete or l'ete, how do i know which one to use?...sometimes its cet ete...sometimes its l'ete...its confusing.

100. Communication

Identify a source of miscommunication with which you are familar. How can this type of miscommunication be effectively addressed or completely avoided?

101. chemistry

if [OH-]=10-pOH. NAd the pOH=7.85 then what does [OH-]equal?

with the following problem: A wagon was used to move a 90 lb rock 120 yds. It took 40 seconds and 70 lbs of force. Find Horsepower and Efficiency % THANKS.

103. chemistry

Two acids have the following pKa values:3.85 and 5.65. what are the corresponding Ka values?

104. math

what is the square root of x4

105. U.S. History

Where can I find statistics for the Trail of Tears? I've found plenty of generalizations and estimations, but I would also like to know how many white army people went along and how many of them died.

106. Environmental

environmental sustainability

107. Architecture

When you draw an elevation from a floorplan, how do you determine the vertical height of windows and doors?

108. microeconomics

Describe some of the opportunity costs when you decide to do the following. Attend college instead of taking a job Watch a movie instead of studying for an exam. Ride the bus instead of driving your car

109. MATH

HOW DO YOU TURN A PERCENT IN TO A DECIMAL???

110. macroeconomics

i have a college macroeconomics question due tommorow can u help?? economy decribed as follows: C=14,000+.5(y-t)-40,000r I=8000-20,000r G=7000 NX=-1800 T=8000 Y=40000 1)find a numeric equation relating planned aggregate expenditure to output and the real

111. geometry

what is the equation of the line whose slope is -3 and which passes through (0,5)?

112. English

Can someone check over the grammatical errors in my riddles. Do you have any suggestions on how to improve them? Often revered for my beauty, I am put on the spot. King Arthur’s lover is what I am suspected to be but the truth is I see in Lancelot what

113. social studies

how did the cotton gin affect production?

114. law

How long is the term for a federal Circuit Judge? I can't seem to find the answer anywhere.

115. social studies

how did places like Saratoga Springs, Montauk Long Island, Lake Erie and Seneca falls get their names?

116. science

how does the constellation make stuff?

117. S

What are some ways we can decrease destruction, fragmentation, or degradation of habitats?

118. social studies

how is the information in newspapers organized?

119. S

What are some ways we can decrease destruction, fragmentation, or degradation of habitats?

120. social studies

explain the two basic way you can look for information on the internet.

121. pre alg.

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. no one has responded to my question yet

122. Chemistry

A gas fills 80ml at 740mm. what volume will it have at standard pressure? Stuck on this problem. Please Help. Thanks

123. math

what is an example of a commutative propery of addition

124. pre-alg

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use a little help, plz!

125. Physics Lab

Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the