valentina

Most popular questions and responses by valentina
  1. math

    Yvonne put $4,000 in a savings account. At the end of 3 years, the account had earned $960 in simple interest. A. how much does she have in her account at the end of 3 years? B. at what annual simple interest rate did the account grow? c. how many more

    asked on October 16, 2015
  2. Chem

    Write a balanced equation for: 1. beta decay of iodine-138 2. capture of an electron by cadmium-104

    asked on July 21, 2016
  3. Chem

    Write the two balanced equations, one for the incomplete combustion of methane (to form carbon monoxide and water vapor), and another one for the complete combustion of methane (forming carbon dioxide and whatever vapor). What are the conditions, at which

    asked on July 21, 2016
  4. science

    which of the following statements accurately describes the development of the geologic time scale?

    asked on November 10, 2014
  5. math

    Ashley uses 1/4 package of raisins for fruit cake. She then uses 1/9 of the remainder for the muffins.What fraction of the package of raisins does she have left? My answer is 2/3. 4/4-1/4=3/4(remainder). then 3/4 x 1/9= 1/12 (muffins)then

    asked on February 21, 2016
  6. social studies

    what significant contribution to Russian history did Prince Ivan III make?

    asked on May 12, 2015
  7. math

    this is the 5th grade problem. This is exactly what I have. Rosa and her friends used 1 2/3 quart of paint on Monday and 1 3/4 quart of pain on Tuesday.How much paint will Rosa and her friends need on Wednesday.If Rosa If Rosa and her friends have 3/4

    asked on January 22, 2016
  8. Chemistry.

    Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water? decreasing pressure increasing temperature decreasing temperature increasing surface area

    asked on March 31, 2011
  9. math

    how can you write 8+8+8+=24 in multiplication way.

    asked on November 26, 2018
  10. math

    Rosa and her friends used 1 2/3 quart of paint on Monday and 1 3/4 quart of pain on Tuesday. If Rosa and her friends have 3/4 quart of pain left, do they have enough pain to finish the job on Wednesday?

    asked on January 22, 2016
  11. chemistry

    Explain how to make a 1.5M solution of copper (II) sulfate with a volume of 250 mL.

    asked on February 6, 2011
  12. chemistry

    How many grams of Lead (II) Nitrate are required to make a 350mL solution of 2.5M Pb2+?-

    asked on February 20, 2011
  13. chemistry

    write a balanced equation for the reaction of copper(II) sulfate with sodium carbonate to produce copper(II) carbonate and sodium sulfate

    asked on February 16, 2011
  14. PHYICS URGENT URGENT PLEASE PLEASE PLEASE HELP ME!

    A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the

    asked on October 30, 2016
  15. PHYSICS URGENT URGENT URGENT URGENT HELP NEEDED!!!

    A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the

    asked on October 30, 2016
  16. math

    cindy can type 50 words a minute. At this rate, how many words can she type in a half hour?

    asked on August 5, 2015
  17. education

    In a minimum of 300 words, discuss at least five selection criteria you would use to “weed” the sites, explaining why you chose the criteria you

    asked on June 23, 2013
  18. Math

    A car and a truck leave the park at the same time, heading in opposite directions. when they are 350 miles apart, the car has gone 70 miles further than the truck. How far has the car traveled? Can someone please help me I am horrible in word problems

    asked on October 7, 2016
  19. math

    A scale drawing of an American flag is 14 inches long and 6 inches tall. The actual flag is 3 feet tall. a. True or False, the scale of the drawing is 2 in. : 1 ft. is it false? b. What is the perimeter of the american flag in the scale drawing? c. What is

    asked on May 25, 2016
  20. Math

    Mr. Singh deposited $170 in his bank. The number of $5 bills was three times the number of $10 bills and the number of one dollar bills was 30 more than the number of five dollar bills how many bills of each type did he deposit

    asked on October 1, 2013
  21. Physics

    A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (a) Draw a diagram for the

    asked on October 27, 2016
  22. Physics

    A ball of mass 0.15kg is dropped from a height of 1.0m onto a flat surface and rebounds to a height of 0.35m. Calculate: (a) The speed of the ball just before the impact, (b) The speed of the ball just after impact, (c) The change of momentum, (d) The

    asked on October 27, 2016
  23. chemistry

    If 2 moled of copper(II) sulfate react with 3 moles of sodium carbonate, identify the limiting reagent.

    asked on February 16, 2011
  24. Math please help

    Colombian coffee beans cost $5.50/lb while Peruvian coffee beans cost $4.25/lb. We want to mix the beans together so as to produce a 40 lb bag costing $4.60/ lb. How many pounds of each type of beans shouold be used ? Please help and show work

    asked on October 7, 2016
  25. chemistry

    A 0.194 g sample of compound is vaporized to fill a 100.0 mL vessel at 750. torr and 100.C. What is the molar mass and molecular formula?

    asked on June 16, 2013
  26. English

    Figure out this word l_d_bu_ Please Help Me!!!!!!!!!!

    asked on January 10, 2012
  27. chemistry

    if you react one mole of sodium hyrdoxide with excess copper(II) sulfate, how many moles of copper(II) hydroxid are produced?

    asked on February 16, 2011
  28. chemistry

    Explain what a limiting agent is and how to identify it

    asked on February 16, 2011
  29. Algebra

    Solve the exponential by expressing each side as a power of the same base and then equating exponents. 5^x-2/4=squaroots 5 please help. Thanks!

    asked on August 3, 2015
  30. Math

    44% off of $158

    asked on September 28, 2012
  31. Math

    What is the volume of a cone with a radius of 3 cm and a height of 6 cm? I can't get this one right for some reason!

    asked on November 10, 2011
  32. chemistry

    if 2.7 moles od sodium carbonate reacts with 5 moles of copper(II) sulfate, how many grams of sodium sulfate will be produced?

    asked on February 16, 2011
  33. chemistry

    if 25 grams of copper reacti with 70 grams of sodium carbonate, identify the limiting reagent.

    asked on February 16, 2011
  34. chemistry

    what are the theoretical mole ratios of copper(II) hydroxide and sodium sulfate?

    asked on February 16, 2011
  35. chemistry

    Why will a new nail react faster in copper sulfate solution than an old, rusty nail?

    asked on February 6, 2011
  36. chemistry

    If you submerge a silver teaspoon in copper sulfate solution, what reaction would you expect and why?

    asked on February 6, 2011
  1. Math

    Hello! I could have sworn I've been to this blog before but after going through some of the articles I realized it's new to me. Anyways, I'm definitely pleased I discovered it and I'll be book-marking it and checking back often! Køb Valencia fodboldtrøje

    posted on April 23, 2019
  2. Math

    2

    posted on April 15, 2019
  3. Math

    You sure are correct thanks for the help my child uses every this so much thanks

    posted on February 21, 2018
  4. Language arts

    Snem

    posted on December 1, 2017
  5. math

    432-49

    posted on March 16, 2017
  6. Math

    actually the right expresion is 100-(5x4)

    posted on March 12, 2017
  7. please help me

    1/2minutes

    posted on March 8, 2017
  8. math

    -4x-31

    posted on February 8, 2017
  9. physics

    12

    posted on November 8, 2016
  10. PHYSICS URGENT URGENT URGENT URGENT HELP NEEDED!!!

    That doesn't help me because I still don't understand it. Please can you at least direct me on how to go about the question as my work is due very soon.

    posted on October 30, 2016
  11. PHYSICS URGENT URGENT URGENT URGENT HELP NEEDED!!!

    weight ladder plus floor upward: 750 + 20.0= 770N wall force + friction at base: 20.0 + 0.40= 20.40N I have no idea what you mean about sum moments about any point.

    posted on October 30, 2016
  12. Physics

    I have completed a but I just don't understand b and c. Please help me asap!!!!

    posted on October 30, 2016
  13. PHYSICS

    A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the

    posted on October 30, 2016
  14. math

    That is all information I have.My answer is: they need on Wed 1 4/5(Monday 1 2/3, Tuesday 1 3/4) So 3/4 is not enough.Is it correct?

    posted on January 22, 2016
  15. math help pls

    3 is a

    posted on October 30, 2015
  16. english

    u are correct except for number 2

    posted on October 16, 2015
  17. english

    1. family, friends, and school work. 2. make us feel wise for buying our home years ago. 3. garden and return feeling much more relaxed.

    posted on October 16, 2015
  18. math

    Help NOW PLEASEEEE

    posted on October 16, 2015
  19. Science

    Data

    posted on October 3, 2015
  20. English

    Thanks so much it was on our homework.... Our teacher said that she would give us a break so she gave us a sheet of word puzzles.

    posted on January 10, 2012
  21. Country Reports

    dont know but i got iceland for my report 2!

    posted on July 20, 2009