Cris

Most popular questions and responses by Cris
  1. chemistry

    Calculate the volume needed to dissolve 11.2g CuSO4 to prepare 0.140M?

    asked on March 9, 2011
  2. Problem Solving

    John bought a shirt on sale for 25% off the original price and another 25 % off the discounted price. If the final price was $16, what was the price before the first discount? (Please i need to present it to our school. I don't know how to solve it. Can

    asked on October 12, 2011
  3. speech

    Choose one of the following topic sentences. Write an eight-sentence paragraph that fully develops the topic. A. The number of automobile accidents in my town can be reduced. B. People are moving from the cities to the suburbs in increasing numbers C.

    asked on June 4, 2007
  4. physics

    How much would the rope stretch to break the climber's fall if he free falls 2m before the rope runs out of slack? k=1.40x10^4N//m mass of man= 90 kg I forgot how to use conservation of energy for this. I tried it, but I did it wrong.

    asked on December 10, 2012
  5. CHEMISTY

    A 25.0 mL sample of perchloric acid solution required 45.3 mL of 0.101 sodium hydroxide solution for complete neutralization. what was the concentration of the perchloric acide solution? work: 0.0453 L NaOH x ( .101 mol NaOH/ 1L NaOH) x (1 mol HClO4/ 1 mol

    asked on November 21, 2015
  6. PHYSICS

    How much would the rope stretch to break the climber's fall if he free falls 2m before the rope runs out of slack? k=1.40x10^4N//m mass of man= 90 kg I forgot how to use conservation of energy for this. I tried it, but I did it wrong.

    asked on December 11, 2012
  7. Physics

    2. When traveling down the road at a constant speed of 55 mph, 26.4 m/s, the tangential velocity of the wheels is also 55 mph. If a car tire is 65.0 cm in diameter, then; a. What is the period and frequency of the spinning car tire? b. What is the

    asked on November 10, 2016
  8. Chemistry

    A 32.907-g sample of a hydrate of Au (CN)3 contains 5.406 g H2O What is the formula for the hydrate? What is the percent water in this compound? What mass of this hydrate contains 100.0 g H2O?

    asked on October 31, 2012
  9. Speech

    During which step of the writing process should you identify the purpose, medium, and audience for whom you're writing? a. prewriting b.proofreading c. revising d. presenting The last three choice occur essentially after the main aspect of the writing has

    asked on June 4, 2007
  10. Inorganic Chemistry

    A 1.577 M solution of AgNO3 has a density of 1.220 gram per centimeter cube. What is the molality of the solution?

    asked on October 16, 2016
  11. Chemistry

    How do you balance the equation? MnO4^-1(aq) + C2O4^-2(aq)-> Mn^+2(aq) + CO2(g)

    asked on November 14, 2012
  12. Problem Solving

    John bought a shirt on sale for 25% off the original price and another 25 % off the discounted price. If the final price was $16, what was the price before the first discount?

    asked on October 9, 2011
  13. Inorganic Chemistry

    Methyl Alcohol (CH3OH) and ethyl alcohol (C2H5OH) form ideal solutions at 50°C, the vapor pressure of pure methyl alcohol is 0.529 atm, and the vapor pressure of pure ethyl alcohol is 0.292 atm. What is the vapor pressure at 50°C of a solution containing

    asked on October 16, 2016
  14. Managerial Accounting

    Gladmark company produces two types of get well cards scented and regular drivers for the four activities as follows: Scented Regular Inspection hours 40 160 Set up hours 50 50 Machine hours 200 600 Number of moves 225 75 1. Calculate the consumption

    asked on June 13, 2010
  15. Physics

    How do you find the ratio of the new/ old world periods of a pendulum if the pendulum wee transported from earth to the moon, where the acceleration due to gravity is 1.63m/s^2? Im not sure if we use 9.8 at all, I think I'm supposed to use T=2 pi sqrtL/g.

    asked on December 10, 2012
  16. chemistry

    Please help me and show me step by step. assume that the reactions are being performed at pressure of 1.2 atm and a temperature of 298K Calcium carbonate decomposes at a high temperature to form carbon dioxide and calcium oxide. How many grams of calcium

    asked on May 9, 2010
  17. Chemistry

    For this equation here: H2SO4 + 2NaOH = 2H2O + Na2SO4 What is the theoretical yield of Na2SO4, in grams?

    asked on March 31, 2018
  18. Physica

    2. When traveling down the road at a constant speed of 55 mph, 26.4 m/s, the tangential velocity of the wheels is also 55 mph. If a car tire is 65.0 cm in diameter, then; a. What is the period and frequency of the spinning car tire? b. What is the

    asked on November 10, 2016
  19. math

    You are standing beside a merry-go-round that your friend is riding. The merry-go-round is 8m in diameter. Describe how the shape of the sine curve models the distance from you and your friend. Identify the function that will model this situation as well

    asked on April 25, 2016
  20. math

    An object is thrown or fired straight upwards at an initial speed of v_0 ft⁄s will reach height h feet after t seconds, where h and t are related to the formula h=-16t^2-v_0 t Suppose the object is fired straight upwards with an initial speed of

    asked on May 25, 2014
  21. PHYSICS

    A block with a mass of 126 kg is pulled with a horizontal force of F applied across a rough floor. The coefficent of friction between the floor and the block is 0.7. If the block is moving at a constant velocity, what is the magnitude of F applied? F

    asked on February 23, 2014
  22. Chemistry

    Aluminum carbide, Al2C3 (s), reacts with water to yield aluminum hydroxide, Al(OH)3 (aq), and methane, CH4 (g). Write the equation for the reaction. How many grams of Al4C3 (s) would be needed to prepare 1.000 L of CH4 (g) measured at STP?

    asked on October 1, 2013
  23. Chemistry

    determine the volume of 45mM ethanol needed to make 1700 microliters that has a final ethanol concentration of 26.5mM?

    asked on October 3, 2012
  24. Calculus

    I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for

    asked on September 17, 2011
  25. chemistry

    a sample of carbon dioxide gas occupies 3.5 L at 25degrees C. At what temperature will the gas volume be 1 L?

    asked on May 8, 2010
  26. ciminology

    Monday 04/13/09 Need help with this.. based on someone's experience with these procedures. Post a 175- to 350-word response restating the events in the proper order. Answer this question as part of your response: 1.) what sources were the rights afforded

    asked on April 13, 2009
  27. quemistry

    arrange the following groups of elements in order of increasing ionization energy : a. Be,Mg,Sr. b. Bi,Cs,Ba. c. Na,A1,S

    asked on November 13, 2012
  28. chemistry

    How many moles of sodium hydroxide are produced when 0.155 mole of sodium reacts with excess water?

    asked on February 24, 2012
  29. managerial accounting

    Accounting homework Gladmark company produces two types of get well cards scented and regular drivers for the four activities as follows: Scented Regular Inspection hours 40 160 Set up hours 50 50 Machine hours 200 600 Number of moves 225 75 1. Calculate

    asked on June 12, 2010
  30. math

    how do you reduce when u divide fractrions.please help. answer as soon as possible. thanks yo!)

    asked on March 25, 2009
  31. Inorganic Chemistry

    What is the mole fraction of solute in a 1.00 molal solution in which toluene (C7C8) is the solvent.

    asked on October 16, 2016
  32. math

    Joe and his 7 friends share 3 liters of juice how much juice each friend gets

    asked on August 29, 2013
  33. Chemistry

    Imagine that you needed to choose an indicator for the titration of a strong base (like NaOH) with a strong acid (like HNO3). You have the indicators in Table 1 available. Which indicator would you choose? Why? Indicator [HIn] [ In] pKa Maryland Red- Red

    asked on September 30, 2012
  34. Spanish help

    This is a written assignment. Will someone please help check whether it is grammatically correct. Instructions: Think of where you live in relation to the nearest airport. Write down directions on how to arrive at the airport from your house, using the

    asked on August 18, 2012
  35. math

    A homeowner wants to plant a garden in his backyard. He decides to have 375 square feet garden and wants the garden to be 10 feet longer than it is wide. Find the dimensions of the garden.

    asked on February 26, 2012
  36. english

    You are writing a paragraph on how to make your favorite sandwich. You have a list of the steps beside you, and you write down the steps in sentences, without stopping to check your work. Finally you've written all the steps into sentences, and you put

    asked on June 4, 2007
  37. Speech

    Please help me write an eight sentence paragraph that fully develops the topic. 1. Getting along with other people is important in my work. What exactly does "getting along" involve? What goals would "getting along" help you to meet your work goals? How

    asked on June 4, 2007
  38. Economics

    If the full-employment budget shows a deficit of about $100 billion and the actual budget shows a deficit of about $150 billion, it can be concluded that there is: a. built-in stability b. a cyclical deficit c. an expansionary fiscal policy d. a

    asked on November 5, 2006
  39. math

    f(x) = 4x-5 and g(x) = 3x, find (fog)(x)

    asked on October 20, 2016
  40. math

    An object is thrown or fired straight upwards at an initial speed of v_0 ft⁄s will reach height h feet after t seconds, where h and t are related to the formula h=-16t^2+v_0 t Suppose the object is fired straight upwards with an initial speed of

    asked on May 29, 2014
  41. chemistry

    If the ground state is 4S^2 , what is the name of the element

    asked on December 17, 2013
  42. chemistry

    supposed we mixed 50.0mL of alcohol w/ enough water to make 400mL solution find the % age by volume of 50L??? what is the answer plz answer my qeustion!!!

    asked on February 28, 2013
  43. Chemistry

    Balance equation c2h3cl + br2

    asked on January 3, 2013
  44. Chem Lab

    Aspirin synthesis and Analysis: Calculate theoretical yield of ASA? Used 3.5mL of acetic anhydride and 1.5g of salicylic acid.

    asked on November 2, 2012
  45. Problem Solving

    During a storewide sale, a TV which usually sells for $450 is on sale for $360. A Stereo which usually sells for $600 is on sale for $480. What would be the sale price of a VCR which usually sells for $500?

    asked on October 9, 2011
  46. Math

    determine the intervals over which the function is increasing, decreasing, or constant f(x)=√x^2-1

    asked on September 18, 2011
  47. science

    Calculate the specific volume of an air-vapour mixture when the temp=30 degree Celsius, water vapour content Mw=0.015 kg/kg, total pressure Pt=90kpa Please any one can help me>

    asked on February 12, 2011
  48. science

    If air at 30 degree c Dry Bulb temp and water vapour content(Mw)=0.015kg/kg flows over a basin containing water at 10 degree C. a) what will happen to the air temp? b) what will happen to the moisture content in the air? c) what will happen to the enthalpy

    asked on February 11, 2011
  49. science

    Calculate the specific volume of an air-vapour mixture when the temp=30 degree Celsius, Mw=0.015 kg/kg, Pt=90kpa

    asked on February 11, 2011
  50. English III

    Okay so I am reading the book The Scarlet Letter and it is like really boring, so far. I am about a chapter in and my homework is really hard! I have to read a sentence the packet gives me and interpret the darn thing. It's driving me insane because these

    asked on June 2, 2009
  51. social studies

    did the Dawes reflect and effort by the unites states government to change native American lives? if so how?

    asked on October 2, 2008
  52. something

    oh yeah which one heviest element out of the first 5 of family 1, first 4 of family 2, 13, 14, and 18. The first 3 of families 15-17

    asked on September 24, 2008
  53. Speech

    Your friend has asked you to write down instructions for installing a kitchen sink. How should you orer the details in a paragraph? Remmeber, you want your friend to be able to easily follow the steps of the process a. spatially b. chronologically c.

    asked on June 4, 2007
  54. Inorganic Chemistry

    what is the molarity of concentrated hydrogen fluoride if the solution is 48% by mass and has a density of 1.17 gram per milliliter.

    asked on October 16, 2016
  55. Chem Lab

    I don't know how to obtain theoretical yield.

    asked on November 2, 2012
  56. science

    decomposing 0.00153 moles cholesterol will release what volume of hydrogen atoms?

    asked on October 12, 2012
  57. Algebra

    -4p-10(2p-3)=22-7(1-2p) Please show all work

    asked on October 19, 2011
  58. 4th grade science

    how do scientist preserve fossils frozen in ice

    asked on September 22, 2009
  59. Science

    how do scientists preserve a fossil frozen in ice

    asked on September 22, 2009
  60. Scienc

    What is the most chemicallyactive nonmetal on the world? i got Chlorine

    asked on September 24, 2008
  1. math

    900

    posted on April 30, 2019
  2. Social Studies

    Angel is right

    posted on October 18, 2018
  3. Math

    48

    posted on October 4, 2017
  4. statistic

    .25

    posted on February 20, 2017
  5. Density Problem

    25353

    posted on December 13, 2016
  6. Physica

    2. When traveling down the road at a constant speed of 55 mph, 26.4 m/s, the tangential velocity of the wheels is also 55 mph. If a car tire is 65.0 cm in diameter, then; a. What is the period and frequency of the spinning car tire? b. What is the

    posted on November 10, 2016
  7. Language Art

    3. c 4. A

    posted on November 27, 2015
  8. social studies

    It's b

    posted on November 13, 2015
  9. Geometry

    Not trying to find the radius were trying to find the circumference

    posted on September 18, 2015
  10. Physics

    For anyone who is looking to solve this in the future: First figure out the angle F= 2Tsin(theta)-mg where, F is total force, and here it must be zero to be at equilibrium T=tension of rope (2.7kN) mg=mass*grav= 9.8*74 then use Tan(theta) = Opposite/

    posted on February 2, 2015
  11. Chemistry

    is the answer 4218.95 mm?

    posted on December 1, 2014
  12. math

    thank you Steve for your help

    posted on May 30, 2014
  13. math

    yes, you're right. the equation is h=-16t^2+v_0t

    posted on May 27, 2014
  14. College Chemistry (DrBob222)

    Excellent job! Thanks a lot

    posted on March 28, 2014
  15. Statistics

    What do you mean "Z" scores in relation to the problem above? sorry, I'm totally confused and overwhelmed

    posted on April 6, 2013
  16. Physics

    actually i think that's wrong, i think its only when they collide and one pushes the other. as result they move in the same direction

    posted on December 10, 2012
  17. Physics

    so far no one is answering our questions. you should try conservation of momentum: m1v1 + m2v2=(m1+m2)vf then just solve for vf, your final velocity...just a suggestion in case you haven't tried it yet.

    posted on December 10, 2012
  18. physics

    I got that far too, but the answer is supposed to be 2.53x10^-3 N. I am not given anything else but the volume.

    posted on December 10, 2012
  19. math

    2^9=512 subsets

    posted on December 8, 2011
  20. Problem Solving

    Thanks a lot Steve. Ur an angel.

    posted on October 13, 2011
  21. chemistry

    v2xt1/v1=t2 1x298/3.5=85.1k

    posted on May 8, 2010
  22. 7th grade

    can you help me? my home work fine the identity card and driving licence ,library card ,pasport.

    posted on September 5, 2009
  23. HHS 265

    I NEED HELP WITH THE ASSIGMENT FINACIAL NAD RATIOS IN CLASS hhS 265 i DO NOT COMPREHEND THE MATH

    posted on November 30, 2008