chels

Most popular questions and responses by chels
  1. Chemistry

    A solution has a pH of 3.90. What is the hydroxide ion concentration? I know that I need to find H30+ first but my teacher doesn't allow calculators on the test. So how would I find the answer WITHOUT a calculator?

    asked on November 15, 2012
  2. Physics

    A 0.53-kg billiard ball initially at rest is given a speed of 12 m/s during a time interval of 4.0 ms. What average force acted on the ball during this time?

    asked on March 1, 2010
  3. Chem

    Which of the following solutions would require the greatest volume of 1.0M NaOH for complete neturalization? a)10.0ml of 1.0M HCl b) " of 2.0 M H2S04 c) " of 3.0M H3P04 d) " of 4.0M H2C204 I don't understand what to do to solve it.

    asked on December 15, 2010
  4. Algebra 2

    An ice-cream parlor sells sundaes with 3 different types of ice-cream and 4 different toppings. They have 8 flavors of ice-cream and 10 toppings for their customers to chose from.what is the probability that a customer orders a sundae including chocolate

    asked on May 24, 2012
  5. math

    Zared plays basketball on his high school team. One of the things he needs to practice is his free throws. On his first shot, there is a probability of 0.6 that he will make the basket. If he makes a basket, his confidence grows and the probability he

    asked on February 19, 2016
  6. science

    In the following equation , 417.96 g of Bi reacts completely with 200 g of F . How many grams of BIF (to the third power) are formed?

    asked on November 29, 2016
  7. U.S History

    Why were the Vietcong so successful against the United States? A.The Vietcong held the strategically important Ho Chi Minh Trail. B.U.S. troops could not engage the Vietcong in traditional warfare. C.Vietcong forces had superior weapons and military

    asked on February 25, 2013
  8. math

    you purchase a bicycle with a retail (pre-tax) price of $760. the local sales tax rate is 7.6%. what is the final cost

    asked on January 28, 2016
  9. Math

    Two teams, the Exponents and the Radicals, square off in a best of 5 math hockey tournament. Once a team wins 3 games, the tournament is over. The schedule of the tournament (for home games) goes: E-R-E-R-E If the Exponents are playing at home, there is a

    asked on February 18, 2016
  10. Algebra 2

    I=2V/R+2r Solve for r.

    asked on April 5, 2012
  11. Help

    dissonance : resonace :: harh : rich music : polyphony polyphony : instrument cacophony : telepragh I presume you mean "harsh" not harh. So, to do an analogy, you really need to understand the meanings of all the words involved. Do you know what dissonance

    asked on January 28, 2007
  12. accounting

    Post-closing trial balance What am I supposed to do when the balance is not equal? As in credits do not match debits. I follow the instructions in the book but no matter what it just does not match, even if i do all the debits on one side and all the

    asked on February 20, 2008
  13. statistics

    The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated by a normal distribution with a mean value of 120 sec and a standard deviation of 25 sec. The fastest 10% are to be given

    asked on April 8, 2011
  14. Chem 219

    If 48.9g of barium chloride dihydrate, BaCl2.2H20, was treated with excess silver nitrate solution. (show formula) a). how many moles of silver chloride precipitated? b). how many grams of silver chloride precipitated? thank you!

    asked on February 8, 2011
  15. Algebra 2

    half life carbon -14 is 5,730 years. If you start out 50 grams, how long will it take until it reaches 2 grams?

    asked on May 20, 2012
  16. maths

    San Jay is 2 years younger than Sara. Who is 5 years old than Sasha. San Jay age and Sasha s age total 31. How old is Sara?

    asked on August 2, 2015
  17. Math Probability

    We have looked at the probability that two non-mutually exclusive events A or B can happen in this learning experience. We will take it one step further and look at the probability that event A or B or C will happen. The formula is: P(A or B or C) = P(A) +

    asked on February 20, 2016
  18. Algebra 2

    two resistors are connected in parallel. Their resistances are 8 ohms and 17 ohms. What is the resistance (R) of the combination? R=---ohms

    asked on April 6, 2012
  19. Tx. History

    What was the American experience?

    asked on November 18, 2010
  20. Physics

    Pulling the string on a bow back with a force of 28.7 lb, an archer prepares to shoot an arrow. If the archer pulls in the center of the string, and the angle between the two halves is 138*, what is the tension in the string?

    asked on March 8, 2010
  21. Physics???

    When the air temperature is below 0 C, the water at the surface of a lake freezes to form a sheet of ice. If the upper surface of an ice sheet 24.2 cm thick is at -10.7 C and the bottom surface is at 0.00 C, calculate the time it will take to add 1.80 mm

    asked on December 4, 2007
  22. health

    the ability to gather, understand, and use health information to improve your health

    asked on January 28, 2010
  23. Algebra 2

    what is the opposite of 49x^2y A. 49x^-2y b. -49x^2y c. 1/49x^2y d. -49/x^2y

    asked on April 9, 2012
  24. chemistry

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

    asked on October 19, 2011
  25. spanish

    La cocina esta muy sucia. Tu padre dice estas lavando los platos lavan los platos lava los platos y saca la basura Estas sacando la basura

    asked on May 20, 2008
  26. Advanced Math

    Find the measure of the reference angle for 400 degrees. How would I do this?

    asked on May 17, 2008
  27. Algebra 2

    I=2V/R+2r Solve for r. simplify

    asked on April 6, 2012
  28. Microbiology Please Help Anyone

    You wish to study a variant [a close relative] of the Tobacco Mosaic virus. Specifically you want to characterize the capsid and genetic component as well as determine the viral load required to cause a disease state. a. What methodologies might you use to

    asked on November 7, 2010
  29. Accounting

    A deposit of $1,250 that was incorrectly in the checkbook as 1,200 should be a. added to the checkbook b. deducted from the cheeckbook c. added to the bank statement balance d. deducted from the bank statement balance ok so I know for sure its not c or d

    asked on February 13, 2008
  30. Trigonometry

    Which Triangle has 2 solutions? a. A=130 degrees, a=19, b=11 b. A=45 degrees, a= 4(sqrt 2) b=8 c. A=32 degrees, a=16, b= 21 d. A=90 degrees, a=25, b=15 I really don't know how to do this one so I can't put what my answer is.

    asked on November 26, 2007
  31. math

    I have fewer ones than tens. The value of my tens is 20. What two numbers can I be?

    asked on August 27, 2013
  32. Algebra 2

    Use the associative property of multiplication to write an expression equivalent to 8x*(4y*7z)

    asked on April 9, 2012
  33. Economics

    A buyer is usually not willing to spend a lot of time and energy researching the market when: c. savings to be made are small or d. prices vary but quality is still the same I read the text but I couldn't really find this exactly, both answers seem like

    asked on January 23, 2008
  34. Radicals

    How do you graph y>= sqrt(3x+12) Show how to get certain points.

    asked on November 6, 2007
  35. Algebra 2(graphing)

    Solve 2x^2=3x+2 by graphing. If exact roots can't be found, state the consecutive integers between which the roots are located. Can you show how to do this step by step?

    asked on November 6, 2007
  36. Algebra 2(quadratic)

    Use the value of the discriminant to determine the number and type of roots for the equation: (x^2+20=12x-16) 1 real, irrational 2 real, rational no real 1 real, rational

    asked on November 3, 2007
  37. algebra 1

    v(v-3)= v^2+6 Does any one know if this is in the quadratic form or not The v^2 means v second power No it is not. Please read: http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut20_quadform.htm

    asked on November 13, 2006
  38. Algebra 2

    A company can produce T-shirts for $0.99 each. They spent $1,000,000 on their building and machines. What is the horizontal asymptotes of the graph that models the average cost of each t shirt, including the start up cost?

    asked on May 22, 2012
  39. Algebra 2

    I=nE/R+nr Solve for R. Simplify

    asked on April 5, 2012
  40. chemistry

    What is the number of grams of KCIO3 to make 750 mL of 0.227 M?

    asked on October 1, 2011
  41. Math

    My qestion is how do you find out how many degrees of latitude separtae each other. For example How many degrees of latitude separate (45N, 65W) and (32S, 65W)? Thanks for your help

    asked on April 20, 2011
  42. Microbiolgy- Please Help!

    You wish to study a variant [a close relative] of the Tobacco Mosaic virus. Specifically you want to characterize the capsid and genetic component as well as determine the viral load required to cause a disease state. a. What methodologies might you use to

    asked on November 6, 2010
  43. chemistry

    what happens when you place sodium hydroxide and water into a calorimeter?

    asked on March 21, 2010
  44. science

    what are all of the formulas for physical science?

    asked on January 25, 2010
  45. Pre-calc

    Simplify i^51 Im really not sure what they are saying. i to the 51ith power? Wouldnt it already be simplfied or what. It doesnt make sense to me.

    asked on May 25, 2008
  46. Physics

    Doubling the amplitude of a wave will double the amount of energy the wave can transfer. true or false Is it true? That's what I think but I am not that good at this sort of thing.

    asked on May 6, 2008
  47. philosophy

    Beautiful harmony comes from things that are in opposition to one another [Heraclitus ok i need to write my personal philosophy and i cant think of any examples of this quote for my body pargraphs...except velcrow..i don't think that a good one thought

    asked on December 13, 2007
  1. L.A help please

    D, D, B. Got a 100%

    posted on December 19, 2018
  2. algebra graphing

    It’s for halving fun

    posted on April 13, 2018
  3. math

    A ) 10*6 = 60 10*6= 60 60+60 = 120 20 heaps

    posted on November 29, 2016
  4. Chem

    A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 mL. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000

    posted on August 31, 2016
  5. math

    No, for the tree I start with a branch of 0.6 and 0.4 and from there branch off to .35,.45,.55, and .65?

    posted on February 20, 2016
  6. Chemistry

    37.5ml 1L .152 mol NaCr 1 mol AgNO3 -------|-------|-------------|-------- 10^3ml 1L 1 mol Na2cr 1 L 25ml -------------|-------- 1 mole AgNo3 10^3ml

    posted on November 15, 2012
  7. Algebra 2

    I tried that already, it didn't work.

    posted on May 24, 2012
  8. chemistry

    Ni with +2 electron

    posted on February 9, 2011
  9. Chem 219

    thank you for your response, I think I can solve the stoichiometry, the main issue for me is trying to set up the formula. do you think could help me try to set up the formula? the components confuse me.

    posted on February 9, 2011
  10. Chemistry

    Molar Mass of KCLO3 (potassium chlorate)= 39.10+35.45+3(16.00)=122.55 First use what you are given, then use the mole to mole ratio to cancel out moles KClO3 and multiply keeping mol O2. (12.00 moles KClO3)x(3 mol O2/2 mol KClO3) =18 moles O2 :D

    posted on February 9, 2011
  11. Chem

    So would the answer be c because it has 3 times the H+?

    posted on December 15, 2010
  12. Tx. History

    I know like the Americas/us wanted to take over the Mexians territory which was Texas or something like rhat.

    posted on November 18, 2010
  13. Tx. History

    For the Mexicans and The us. Around early 1800s in Texas

    posted on November 18, 2010
  14. spanish

    No I know what it says but the first is the question and the others are the answer choices. They didn't seem to make sense to me, like none of them were right

    posted on May 20, 2008
  15. Accounting

    Yeah I know that's why Im confused.....I know how to use and balance a checkbook but these are the only choices they gave me.

    posted on February 13, 2008
  16. accounting

    This is what my book says The first step in closing is to transfer the balance of the revenue account to Income summary, the balance is found in the Income Statement section of the work sheet Then to record into the general journal 1. Enter "closing

    posted on February 13, 2008
  17. Physics???

    if anyone checks this-please help!!!! please!!

    posted on December 5, 2007
  18. Algebra 2(check pt 4)

    I am so stuck on these same exact problems on my Algebra 2 test.

    posted on October 18, 2007