Monday
December 22, 2014

Posts by dd


Total # Posts: 114

chemistry
What is the molality of 67.1g of Nano3 in 2.5l of water i get the molar mass of nano3 and divide it by the 67.1g and multipy it by 2.5l
December 12, 2014

chemistry
calculate the energy required to raise the temp of 72g of water from 50c tp 150
December 11, 2014

chemistry
is finding the molality and molarity the same concept
December 11, 2014

chemistry
IS IT POSSIBLE IF YOU CAN DO THIS ONE FOR ME SO I CAN DO THE REST ON MY OWN SO I HAVE A IDEA OF WHAT TO DO AND WILL BE EASIER TO UNDERSTAND
December 11, 2014

chemistry
how much heat is required to raise a 54g sample of water from -20 celsius to 90 celsius explain
December 11, 2014

chemistry
Dr Bob i would really like to thank you for your time this has greatly helped my learning in school
December 11, 2014

chemistry
How do u tell of a solute is polor or non polar based on what
December 11, 2014

chemistry
how many moles of solute are contained in 18.5ml 2.5m CaCL2
December 11, 2014

chemistry
is finding the molality and molarity the same concept
December 11, 2014

chemistry
it wud help alot if you can plug in and show how
December 11, 2014

chemistry
What is the ppm of 4.50mg of ddt in 10kg of seal fat?
December 11, 2014

chemistry
Increasing pressure does what to solubility. Increasing surface area? increasing temp?
December 11, 2014

algebra2
Tim has a pool slide that makes an angle of 25 with the water the top of the slide stands 4.5feet above the surface of the water A:how far out into the pool will the slide reach B:The slide makes a straight line into the water. How long is the slide
December 10, 2014

algebra2
At a hot air balloon festival jim watches a hot air balloon rise form a distance of 200 yards. A:From jims position the ballon seen to hover at angle of elevation of 50 What is the height of the ballon B:After a while the ballon seems to hover at an angle of 75 how high is it ...
December 10, 2014

algebra2
A kite string is 102 feet long. the angle between the kite string and the ground is 54.9. how high is the kite
December 10, 2014

please check my english
all of those answers are wrong you will get a F
December 4, 2014

Chemistry
I cant understand anything
December 3, 2014

algebra2
MS TAn bought a bmw for 62,000. The price of a bmw depreciates at the rate of 12% per year. How much will the saving account have after 30 years
November 19, 2014

algebra2
a saving account with an initial balance of $15000 grows at 1.33percent per year compounded continuously. How much will the saving account have after 30 years?
November 19, 2014

calc
Each of the regions A, B, and C bounded by f(x) and the x-axis has area 5. Find the value of ∫2 [f(x)+3x^2+2]dx. −4 I know to solve I can find the antiderivative of the equation but im not sure how to do this because of the f(x) in the parentheses.
November 16, 2014

physics
Two blocks with masses m1 = 13.4 kg and m2 = 74.2 kg, shown in the figure, are free to move. The coefficient of static friction between the blocks is 0.55 but the surface beneath m2 is frictionless. What is the minimum force F required to hold m1 against m2?
October 21, 2014

math
Your store’s average basket (transaction) size for the month of March was $11.50 and you believe the average basket size will remain the same for your store in April. One of your hourly employees had an average basket size of $9.00 for the month of March and averaged 125 ...
June 27, 2014

Math
If 1/3 of. My salary is in one bank, 1/5 in another and 1/6 in another how much I have left
March 23, 2014

health
its not C.
March 3, 2014

Statistics
Suppose 5 cards are drawn, without replacement, from a standard bridge deck of 52 cards. Find the probability of drawing 4 clubs and 1 non- club.
December 1, 2013

Physics 101
49
October 27, 2013

Chemistry
i don't know
October 12, 2013

Chemistry
2.56 good answer
October 12, 2013

Chemistry
The density of methanol is .7918 g/ml/ How many grams of methanol do I have to add to 35.0ml of water to make a solution containing 25% methanol?
September 7, 2013

statistics
Researchers conducted a survey of parents of 66 kindergarten children. The parents were asked whether they played games with their children. The parents were divided into two groups: working class and middle class. The researchers wanted to know if there was an association ...
August 23, 2013

Math
Which statement(s) is/are true?Select one of the options below as your answer:A. A 25° angle is congruent to a 25° angle.B. Two intersecting lines form two pairs of congruent angles.C. It is possible for congruent angles to add up to 90°.D. All of the above are true.
July 24, 2013

math
x-y+z=3 2x-y+z=4 x+2y-z=-1 solve in Gaus-Jordan method
July 13, 2013

Physics
the C is wrong for me using the b in di/dt
June 15, 2013

Physics
E⃗ = 8.6 xˆsin(2πλz + 5.91e16 t) V/m B⃗ = Bo⃗ sin(2πλz + 5.91e16 t) Tesla o can you explain the formula what is n, c and omega?
June 14, 2013

Algebra
6964.4
June 1, 2013

Physics
how is you process?
April 27, 2013

Physics
contact me ulisesvzv @ gmail . com i have the half of answers
April 13, 2013

physics
A coil consists of N=105 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.12 m and the outer radius is r1=0.14 m. Thus, each winding has a diameter d=0.02 m. What is the self-inductance (in H) of this coil? Work in the ...
April 12, 2013

physics
thanks, do you have the c?
April 12, 2013

physics
Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy stored (in Joules) in ...
April 12, 2013

physics
Consider the process of charging a parallel plate capacitor with circular plates of radius R=5 cm separated by a distance d=0.2 cm. At some time t1, the capacitor is being charged with a current I=0.075 A. Consider a point P on the plane which is equally distant from the two ...
April 12, 2013

physics
i have the answer, thanks :)
April 12, 2013

physics
Compare the total magnetic energy in two solenoids, each with N turns, area A, and current I, but length x and 2x. Denote Ux the total magnetic energy in the solenoid with length x, and U2x the one in the solenoid with length 2x. What is U2x/Ux?
April 12, 2013

Physics
a and d please
April 9, 2013

Physics
i got it, is the negative :)
April 9, 2013

Physics
C) i3 please, i3 isnt same to i2
April 9, 2013

physics
i need only the c1
April 9, 2013

statistics
xc
November 14, 2012

math
5,128,000
June 20, 2012

chemistry
2. Baking soda is sodium bicarbonate (NaHCO3). When you heat baking soda, it breaks down into sodium carbonate powder (Na2CO3), water vapor, and carbon dioxide. The enthalpy of this reaction is 129 kJ. Write a correct thermochemical equation for this reaction, explain how you ...
May 14, 2012

science
A. 1.36 m/s B. 0.06 m/s C. 8 m/s D. 4.5 m/s
May 8, 2012

physics
if a steel flagpole get 5.1 mm taller when temperature increase by 5.0 degree celsius approximately how tall is the flagpole?
April 12, 2012

Chemistry
How do I figure out how to balance 1 mole of carbonic acid with 1 mole potassium hydroxide? And balance a chemical reaction of sodium bicarbionate with hydrochloride acid?
March 18, 2012

physics
a cyclist must travel 1500 km . how many days will the trip take if the cyclist travels 8 h/day at an average speed of 25 of 25 km/h ?
September 14, 2011

economics
For example the productive needs of the firm would be to set (Marginal Revenue = Marginal Costs (MR = MC) and create excess profits for the firm. However, as far as what is in the best interests of society it might be Price or (Average Revenue) = MC. Give the answers of both ...
September 3, 2011

economics
How do minimum wages affect equilibrium price?
September 3, 2011

maths methods
Find the angle of depression from top of a 500 m long chairlift with a vertical height of100 m
August 1, 2011

physics
1. The best leaper in the animal kingdom is the puma, which can jump to a height of 12 ft when leaving the ground at an angle of 45°. With what speed, in SI units, must the animal leave the ground to reach that height?
June 19, 2011

math
Ddtfyyfy
May 30, 2011

math
is the realtion a function? explain (1,1), (2,1), (3,1), (4,1)
March 25, 2011

Math
An open box with a square base is to bemade to organize items in the trunk of a car. It is planned to use an area of 16m square of flexible plastic forthis box. What are the dimensions of the box for max volume?
February 24, 2011

Literary Analysis and Composition
Taking the same test!!! right now there are no answers to be found but hey it was worth a shot
February 16, 2011

spanish NEED HELP!!!!
number 7 is Hablaran NOT supieran
November 29, 2010

Java Programming
// Create a Scanner object to read input. Scanner keyboard = new Scanner(System.in); // Get the Purchase Amount System.out.print(" What is the Purchase Amount?"); purchaseAmount=keyboard.nextDouble( ); stateSalesTax=0.04*purchaseAmount; countySalesTax=0.02*...
October 31, 2010

AP chemistry
fg
October 23, 2010

college Chemistry
what is the amount of heat lost in KJ for 50 ml of water going from 70.0 degrees C to 1.0 degrees?
July 1, 2010

physics
An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 3.5 m/s2. The magnitude of the car's velocity at the end of stage...
May 26, 2010

algebra
How do you find any x-intercepts and y-intercepts. If no x-intercepts exist, state this. g(x)=2x^2+3x-1
April 24, 2010

Chemistry II
What is the vapor pressure of benzene at 23◦C (about room tempera- ture)? The normal boiling point of benzene is 80◦C and its molar heat of vaporization is 30.8 kJ/mol.
February 4, 2010

french
what does this mean in english ecris la partie correcte d,aller apres chaque nom ou pronom
November 24, 2009

6th grade
WHAT IS A PUZZLE
September 24, 2009

Math Help Please
So the funtion is: x^2(x - 7)(x + 3 - 5i)(x - 3 + 5i) For it to have rational coefficients, you must get rid of the -3 + 5i term. Therefore the remaining zero is: 3 - 5i so your answer would be (C)
July 22, 2009

math
solve the system of equation by graphing then classify the system as consistent or inconsistent and as dependent or independent 8x-4y=-20 4y-8x=-20
July 22, 2009

math
you know you are right i did forget to change the symbol sorry so the answer is x>40 or x >-40 because negative and negative is negative i'm i right.
July 21, 2009

math
Solve -0.6x < -24 x=-40 the solution is {x|<-40} do it have it right!!!
July 21, 2009

math
can you check if i have this one right 0.6x+2=1.4x-1 my answer is ¡Ý 3.75 im i correct
July 21, 2009

math
solve using the multiplication principle. -1/2x=-3/4
July 21, 2009

math
0.6x+2 ¡Ü 1.4x-1
July 21, 2009

alegbra
translate to an algebraic expression the product of 37% and some number
July 21, 2009

Algebra
evaluate z+y/9 for z=62 and y=10 z+y/9=
July 20, 2009

math
8x=-72 i divided on each side and my answer is x=-9 i'm i right by the way thanks
July 20, 2009

math
Determine whether (-2,-1) is solution of 7x+6y=-3
July 20, 2009

science
how many tornados dose ohio average
March 17, 2009

science
Thank you.
March 7, 2009

science
what site would i go to to summerize the climate changes that have accured from the past to the present and predict what you think the Earth will look like into the 21st. century????
March 7, 2009

human services
Thank you!
March 4, 2009

human services
I am to identify the needs and expectations of P.E.A.C.E domestic violence agency in human service plan, can anyone suggest a web site that I might read and learn these identities and name the different types of stakeholders.I want to check out other sites other than my class ...
March 4, 2009

human services
I had planned to write a program plan for my human service project. One of the things I need to know is what is elements and how would I use these elements to make an effective program plan. If I could find a web site that would give me enough information then I can go from ...
February 25, 2009

human services
I need help with identifying the elements of an effective program plan through out an evaluation
February 25, 2009

MATH
I REALLY NEED HELP CAN YOU HELP ME PLEASE
February 21, 2009

spanish sra jmcguin
see gfhdthis hgddis hfjdjcdeasy fdsjfl;saspainish
February 21, 2009

To: dd -- human services
yes thank you!
February 18, 2009

To: dd -- human services
What I have learned about the multimedia is the ways that the human service can use information to deliver to their clients. Pamplets, vedeos, and the interactions between the communities and the people in them. I may not be saying this right, so this is why I need some help. ...
February 18, 2009

math 6th grade
wont me to show u
February 9, 2009

Math
i need to check my answers for my THA #27
January 7, 2009

5th grade Geomentry
I LOVE MATH
December 2, 2008

government
Why is the president more successful in foreign policy? This difference narrowed from 1965 to 1975 (55% foreign policy to 46% domestic policy). What explains the president’s poorer recent performance in foreign policy?
November 22, 2008

government and politic (please help...i'm stuck)
One of the problems of liberty is that one person’s liberty sometimes conflicts with another’s liberty and one must take precedence. How would you resolve the following conflicts between rights of the individuals and why? [h] Fountain Valley High School has 80% ...
November 10, 2008

chemistry
r3r3r44
August 30, 2008

Criminology
I'm just not sure where to begin. Who's an interesting gang or person to do this assignment on.
April 2, 2008

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