johny
Most popular questions and responses by johny
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 
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 
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 
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 
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 
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 
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 
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 
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 
progamming JAVA
1.Write an algorithm, in English, to solve the following problem. Be sure to include pre and postconditions! 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 
organic
what is the major species present in a solution of glycine at a ph of 2
asked on January 22, 2009 
calculus
what happens when Limit as x approaches infinity A) (sqrt(9+10x^2))/(7+9x)
asked on December 1, 2011 
science
why is the pressure more on ground when a person is walking than when he is standing ?
asked on September 28, 2011 
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 
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 
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 
Calculus
what happens when the limit goes to infinity 4x6sqrt(x)
asked on December 1, 2011 
math 117
can someone help me with this radical numbers problem? (2suare root 8)(2square root 8) would it be 2 square root 4?
asked on August 15, 2010 
organic chemistry
what is the first and second step in a alkene halogenation reaction
asked on February 6, 2009 
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 
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 
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 
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 
physics
Imagine a car involved in a headon 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 
science
how does the weight of an object change with in sea change with densities ?
asked on September 28, 2011 
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 
organic
what is the best way to synthesize 4isopropylbenzonitrile?
asked on March 2, 2009 
organic
what amine forms an Nnitrosoamine on treatment with NaNO2 in dlute aqueous acid at 0 degrees celsius?
asked on March 2, 2009 
organic chemistry
What compounds gives diethylamine, on reduction with lithium aluminum hydride?
asked on March 2, 2009 
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 
organic
what is the best synthesis of 4isopropylbenzonitrile?
asked on January 22, 2009 
organic
how do you prepare mbromophenol (E)?
asked on January 22, 2009 
organic
what amine is forms an Nnitrosoamine on treatment with NaNO2 in dilute aqueous acid at 0' C?
asked on January 22, 2009 
organic
how do you convert methylCH2CH2CH2CH3 to methylCHCLCHCLCH2CH3
asked on January 22, 2009

math
Yes
posted on February 1, 2018 
Science
a is the correct answer
posted on December 5, 2017 
SCIENCE
You are going to fail
posted on March 16, 2017 
Physics
2c
posted on September 8, 2016 
PLZZ HELP ME WITH THIS MATH MS SUE.
this don't help
posted on March 1, 2016 
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 
social studies
true
posted on February 26, 2016 
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 
phi103
display all the possible truth values involved with a set of sentences.
posted on December 7, 2013 
organic chemistry
what site dr bob
posted on February 6, 2009