johny

Most popular questions and responses by johny
  1. chemistry

    mass of crucible- 26.4574g mass of crucible and hydrated sample- 27.7617g mass of hydrated sample 1.3043g mass of crucible and dehydrated sample- 27.5693g mass of dehydrated sample- 1.1119g mass of filter paper- 0.7089g mass of filter paper and copper-

    asked on February 19, 2013
  2. chemistry

    how much heat is required to melt 15 g of ice which is at a temperature of 0 degrees celsius

    asked on July 24, 2012
  3. algebra

    Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

    asked on January 14, 2019
  4. Math

    The minimum is (3 π, 5) and the maximum is (5 π, 8). What is the amplitude and what is the period?

    asked on December 16, 2014
  5. Statistic

    Researchers collected samples of water from streams in a mountain range to investigate the effects of acid rain. They measured the pH (acidity) of the water (a lower pH means the water is more acidic). They then classified the steams with respect to the

    asked on May 3, 2015
  6. Chemistry

    You are given the following decomposition reaction of ammonia NH3 ---> H2 + N3 unbalanced When you decompose 12.0g of NH3you produce 1.87 g of H2 Calculate the percent yield of H2

    asked on April 18, 2013
  7. math

    there is a women standing on a building. she sees a car. angle of depresion changes from 28 to 43 . distance traveled is 230 . find the hight of the building

    asked on December 16, 2014
  8. chemistery

    What is the molar concentration of a solution of sulfuric acid, H2SO4, if 4.64 mL react completely with 0.644 g of NaOH which was dissolved in 200 mL of water? Hint given in feedback

    asked on October 7, 2014
  9. physics

    can i have multiple choice questions on thermodynamics: relationship between work and heat, the first law of thermodynamic, and the second law of thermodynamic

    asked on March 18, 2011
  10. progamming JAVA

    1.Write an algorithm, in English, to solve the following problem. Be sure to include pre- and post-conditions! 2.Problem: Solve X mod Y for all positive integers. Do so without using multiplication or division. 3.What is (7 / 3) + (4 % 5)?

    asked on April 17, 2010
  11. organic

    what is the major species present in a solution of glycine at a ph of 2

    asked on January 22, 2009
  12. calculus

    what happens when Limit as x approaches infinity A) (sqrt(9+10x^2))/(7+9x)

    asked on December 1, 2011
  13. science

    why is the pressure more on ground when a person is walking than when he is standing ?

    asked on September 28, 2011
  14. organic

    which substituent increases the acidity of a phenolic hydroxyl group when located next to it? CH3- CH3Cdouble bond O -C double bond N

    asked on January 22, 2009
  15. math

    There is a plane on top of a triangle with angles of 40 degrees and 80 degrees. The 40 degree angle is on the bottom left and the side opposite is Y. The 80 degrees angle is on the bottom right and the side opposite is X. So... What is X and what is Y?

    asked on January 13, 2015
  16. Math

    What is the area of a quadrilateral with sides 24 and 40 and a shared angle of 135 degrees ? Thank you

    asked on January 13, 2015
  17. Calculus

    what happens when the limit goes to infinity 4x-6sqrt(x)

    asked on December 1, 2011
  18. math 117

    can someone help me with this radical numbers problem? (2suare root 8)(2-square root 8) would it be 2 square root 4?

    asked on August 15, 2010
  19. organic chemistry

    what is the first and second step in a alkene halogenation reaction

    asked on February 6, 2009
  20. Math

    How to solve this problem? Here is what I have done so far. 12(1/2)% x (1/2)/(3/4) First i solved the fractions (1/2) x (4/3) =4/6 I changed the 12(1/2)% into a decimal by solving 1/2, which is .5 which equals to 12.5 Answer is 1/12 but I have no idea how

    asked on March 9, 2016
  21. math

    Suzy was putting a stone boarder around her square garden.she las able to complete one side of her garden before she ran out of stones.she usted 9 sones for the first side.How many more stones will she buy to complete her stone boarder?

    asked on January 4, 2016
  22. math please help ASAP

    There is a plane on top of a triangle with angles of 40 degrees and 80 degrees. The 40 degree angle is on the bottom left and the side opposite is Y. The 80 degrees angle is on the bottom right and the side opposite is X. So... What is X and what is Y?

    asked on January 13, 2015
  23. Math

    A building was 210 ft high and a guy was 8 ft from the top and let down a wire that is .44 radians (degrees) to the ground... How long is the wire?

    asked on December 30, 2014
  24. physics

    Imagine a car involved in a head-on crash. The driver, whose mass is m, is to be brought uniformly to rest within the passenger compartment by compressing an inflated air bag through a distance sc. Write an expression for the average force exerted on the

    asked on May 30, 2012
  25. science

    how does the weight of an object change with in sea change with densities ?

    asked on September 28, 2011
  26. Programming JAVA

    1. What is 9.9 + (11 % 8)? 2. Write one line that creates a variable named Pickles that can hold an integer and assign it the value of ten.

    asked on April 17, 2010
  27. organic

    what is the best way to synthesize 4-isopropylbenzonitrile?

    asked on March 2, 2009
  28. organic

    what amine forms an N-nitrosoamine on treatment with NaNO2 in dlute aqueous acid at 0 degrees celsius?

    asked on March 2, 2009
  29. organic chemistry

    What compounds gives diethylamine, on reduction with lithium aluminum hydride?

    asked on March 2, 2009
  30. organic

    what will the structure look like if a tetrahedral intermediate is formed during the reaction of an ester with an amine?

    asked on February 6, 2009
  31. organic

    what is the best synthesis of 4-isopropylbenzonitrile?

    asked on January 22, 2009
  32. organic

    how do you prepare m-bromophenol (E)?

    asked on January 22, 2009
  33. organic

    what amine is forms an N-nitrosoamine on treatment with NaNO2 in dilute aqueous acid at 0' C?

    asked on January 22, 2009
  34. organic

    how do you convert methyl-CH2CH2CH2CH3 to methyl-CH-CL-CH-CL-CH2CH3

    asked on January 22, 2009
  1. math

    Yes

    posted on February 1, 2018
  2. Science

    a is the correct answer

    posted on December 5, 2017
  3. SCIENCE

    You are going to fail

    posted on March 16, 2017
  4. Physics

    2c

    posted on September 8, 2016
  5. PLZZ HELP ME WITH THIS MATH MS SUE.

    this don't help

    posted on March 1, 2016
  6. chemistry

    HF is the hydrogen bond in the listed below because hydrogen must be bonded to either a fluorine,oxygen or nitrogen atom.

    posted on February 27, 2016
  7. social studies

    true

    posted on February 26, 2016
  8. Math

    They are not parallel because they do not have the same slope. They are not perpendicular because their slopes and not opposite reciprocals of each other. So... they are neither. The slope for line A is -5/3 and the slope for line B is 5/3

    posted on January 13, 2015
  9. phi103

    display all the possible truth values involved with a set of sentences.

    posted on December 7, 2013
  10. organic chemistry

    what site dr bob

    posted on February 6, 2009