Saturday
October 25, 2014

Posts by Jack


Total # Posts: 1,341

chemistry
How many grams of oxygen are there in 100.0 grams of water? What percentage of the mass of water is oxygen?
February 15, 2010

chemistry
Find the number of K atoms, C atoms, and O atoms in 95.5g of K2Cr2O7. (Potassium 2, Chromium 2, Oxygen 7).
February 15, 2010

English
they seem good to me
February 15, 2010

chemistry
consider the reaction in which 410 grams of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement reaction. 1-how many grams of lithium are required? 2- how many grams of each product can be produced?
February 15, 2010

mathhhh
i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course
February 4, 2010

math
i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course
February 4, 2010

math
a trianglar course for a sailing race is marked off by buoys. The first lef is 250 meters longer than the second and the third leg is 100 meters shorter then the first. if the length of the course is 2500 meters, find the length of each length
February 4, 2010

math
the first side of a triangle is 8 meters longer than the second side. the third side is 3 times the second side. the perimeter is 128 meters. find the lengths of the three sides.
February 4, 2010

chemistry
The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees celcius is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees celcius. Calculate its molar heat of vaporization (in kJ/mol).
January 31, 2010

History
sue's answer doesnt help at all. thanks alot i failed
January 26, 2010

History
All of the following account for nativist sentiment against the New immigrants of the late 19th century EXCEPT that the immigrants a. practiced different religions b. had different languages and cultures c. were willing to work for lower wages than were native born workers d. ...
January 26, 2010

science
I added 40 mL of NaOH 1N to rise the pH of 10g teriphitalic acid from 5.3 to 6.3, so if I adde the same 40 mL of NaOH to 12g of the same acid what is the new pH will I have?
January 22, 2010

science
why does magnesium dissolve quicker in strong acid
January 17, 2010

Physics
Oop's, my bust. It's 60 Joules. I believe the 50m was thrown is a curve to throw me off, as as the '60J' = W. Otherwise it would have been say '60N over 50m = 3000J'. Thanks guys.
January 17, 2010

Physics
A car with a mass of 100 kg, with initial v = 1 m/s, has 60 Joules of energy added for 50 m. What is the final velocty? I'm using KE = 1/2 mv^2 to find initial KE. Then add 600 J to this for the final KE. Thus, W = KFf - KEi; KEf = W + KEi and KEf = 1/2mv^2 v^2 = (2(KEf))/m
January 17, 2010

9th grade
an egyptian form of writing
January 14, 2010

Math
How do you divide whole numbers?
January 13, 2010

Math
how do i compute a problem like 4/7 * 2/3 * 6
January 5, 2010

Algebra
15=2(9+4)+3
December 31, 2009

math
DQ sells 6 times as many orders of french fries as sonic everyday. If both sold 60 more orders DQ would only sell 3 times as many fries. How many do each sell before and after the incease?
December 23, 2009

Pre-Cal
Find the exact value of sec 60°tan135°-cot60°sin60°
December 23, 2009

math
The sweater shop projected income this year will be 69,000. That amount represents 40% of the shops annual sales. What is the shops projected sales
December 22, 2009

math
If I gross 2645.00 and taxed 31% how much do I bring home?
December 22, 2009

math
a wagon retails for 49.97 the store receives a built in 40% profit margin what is the cost
December 21, 2009

math
I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase? 30/10 chain discount means .70 x .90
December 21, 2009

math
I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase?
December 20, 2009

solve for unknown
thank you
December 19, 2009

solve for unknown
If jack does home improvment and price the material ,add 1 and 1/2 times that amount for labor and then quotes the job. If he gets the job for 17,000 how much is the material? and labor ?
December 19, 2009

math
wagons retail for $49.97. stores receive the wagons with a 40% profit margin. what is the cost?
December 18, 2009

French
What does conduissez mean in french?
December 11, 2009

math
Mr. Havel bought a car for $2400 and sold it for $2700. what was the percent of profit for Mr. Havel in selling the car?
December 2, 2009

health
for the health i get very good but my head alwas hrt so how do i do i don't know tell me why
December 2, 2009

physics
31^2+67^2=5186 sqrt(5186)=72.01388 ANSWER =72.01388
November 27, 2009

science
How does the portuguese man of war contribute to science?
November 23, 2009

religious education
please could someone help me answer this question - can science prove that God does exist? thankyou
November 20, 2009

Math
Thanks!
November 18, 2009

Math
I need help with an inverse function. If f(x)=3-x, I find the inverse function to be: x=3-y which is the same as y=3-x, same as the original. How can this be?
November 18, 2009

physics
A worker exerts a 140 N horizontal force on a 41 kg crate. The crate's acceleration across a level floor is 0.90 m/s2. Find the frictional force that the floor exerts on the crate.
November 18, 2009

physics
Suppose David Ortiz hits a home run which travels 361. feet (110. m). Assuming it left the bat at 50.°, how fast was it hit?
November 12, 2009

psychology
1)When conditioning takes place, behavior is associated with? a. ideas b. stimuli, consequences, or both c. events in the environment d. both b and c are answers. my first answer was b but this was wrong. Is the correct answer d? 2) In classical conditioning, the main ...
November 11, 2009

Psychology
1) The type of learning that involves reasoning, problem solving, language, memory, association of ideas, and other mental processes is Cognitive learning. Is this correct? 2) When you are figuring out how to memorize information for your college tests, you are engaging in ...
November 11, 2009

physics
answer.a car of mass 2000kg,increases its velocity from 10to 40 m\sec in time interval of 2 sec. calclate the force?
November 11, 2009

science
what are the chemical properties of scandium
October 25, 2009

writing
I'm writing an essay about a book I read, and I need to make a personal connection with a character that is conceited, brave, and strong. Could someone give some examples of personal connections?
October 21, 2009

cathedral
How do you figure out the space and volume ratio cube
October 21, 2009

Physics
if an obejct has an horizontal acceleration of -0.51 m/s squared and vertical acceleration of -7.683 m/s squared, what is the resultant acceleration?
October 15, 2009

Accounting
Do you help with accounting homework?
October 12, 2009

Physics
An object traveling at 5.0 m/s East has a mass of 6.0 kg. What is the magnitude of the object's momentum? I am not sure what the formula is for this one!
October 11, 2009

science
Do you think it would have been possible to know that living things are made up of cells without microscopes? Explain your thinking.
October 7, 2009

Gen 105
How can you use study techniques recommended for your personality type and strongest intelligence(s)to function best in distance learning enviroment
October 5, 2009

Economics
Is the Board of Governors influenced by Political Consideration?
October 4, 2009

Math
(4 x 1/2 + .87 + 17/16 + 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13
September 28, 2009

math
(6/7 x 4p + 3/4 - 8/19) (5p - 9x .88 x 0 /4) x 10%
September 28, 2009

math
(4 x 1/2 + .87 + 17/16 = 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13
September 28, 2009

Algebra
how to rewrite the expression using the inverse operation?
September 27, 2009

english
what are a list of Adverbs
September 21, 2009

algebra
Moon - 240000 mi Jupiter - 391000000. The space vehicle would take how many days to reach Jupiter? Saturday,
September 20, 2009

Math
Select the set of equations that represents the following situation: The sum of two numbers is 38, and their difference is twenty-six more than the smaller number. What are the two numbers?
September 20, 2009

algebra
How do you set this up as an equation? There is a total of 1600 cups and bowls. cups cost 1.90 and bowls cost 2.85. how many of each do you have if the bill was 3430.00. and that includes 105.00 saucer.
September 10, 2009

Math
I have $100.00 dollars to spend to buy 100 animals. Cows cost $50.00 each, sheep cost $3.00 each, pigs cost $2.00 each and chicks cost $0.10 each. How many of each do I need to buy to spend $100.00 dollars and have 100 aninals?
September 9, 2009

statistics
you are constructing a 95% confidence interval using the information: n = 50, xbar = 54.3, s = 2.1 and E = 0.65. What is the value of the middle of the interval?
August 12, 2009

Environmental Science
Stop looking to outside sources to do your school work you retard...figure it out for yourself
August 8, 2009

penn foster
explain how evalution and management e/m codes are grouped
August 6, 2009

Literature
The book Dracula can be substituted for which book read by the creature in the novel Frankenstein? Paradise Lost Ruins of Empires Plutarch's Lives Sorrows of Werter I think maybe Ruins of Empires but I am really not sure. The assignment is to substitute the reading ...
July 29, 2009

Marine science
Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level? My answer was that the larval and juvenile stages would get more energy but my teacher said that ...
July 29, 2009

Literature
I also need to find four different works that could be used to substitute the four that the creature read in the novel Franenstein which would change the creature. Does anybody know any websites that I could use to help me because I have no idea books to pick?
July 28, 2009

Literature
I need to know the four works that the creature in the novel Frankenstein read! Paradise Lost, Plutarch's Lives and Sorrows of Werter. I cannot remember what the last one is!!
July 28, 2009

Marine science
How has the Galapagos Tortoise changed or adapted over time?
July 26, 2009

marine science
How long has the Galapagos Tortoise been in existence?
July 25, 2009

Math
use the given zero to find all the zeros of the function. f(x) = x^3 + x^2 + 9x + 9 r = 3i I do not understand this!!
July 15, 2009

Math
Solve: (3-2) - (2-3)
July 13, 2009

Math
Find all the zeros of the function and write the polynomial as a product of linear factors. g(x)=x^5 - 8x^4 + 28x^3 - 56x^2 + 64x - 32 The zero I found so far is 2. I am confused on how to find the rest.
July 12, 2009

Math
Find a polynomial function with integer coefficients that has the given zeros. 0,0,4,1+i Please explain!! I am very confused.
July 12, 2009

english
A B C D
July 12, 2009

english
I just need help on this passage... To be a King, and wear a Crown, is a thing more glorious to them that see it, than it is pleasant to them that bear it: for my self, I never was so much enticed with the glorious name of a King, or the royal authority of a Queen, as ...
July 12, 2009

math
Find all the zeros of the function. f(x) = x^3 + 11x^2 + 39x + 29 I found one of the zeros = -1 but I am confused on how to find the other two.
July 1, 2009

math
Find all the zeros of the function. t^3 - 3t^2 - 15t + 125 Please explain. I am very confused on how to do this!!
July 1, 2009

Physics
I had to graph the following data and find the slope: Normal Force: Frictional Force: 0 0 2.0 0.6 6.0 1.8 9.0 2.7 10.0 3.0 The slope was 0.30. The question that I am confused on is what does this graph's slope represent?
June 24, 2009

math
Perform the operation and write the result in standard form. 1 + i over i - 3 over 4 - i Do I have to multiply top and bottom by i?
June 10, 2009

math
Perform the operation and write the result in standard form. 8 + 20i over 2i Please explain, I am very confused!!
June 10, 2009

Science
Crustaceans grow by doing what?
June 7, 2009

English
"Disguise" is stressed on the second syllable, not the first. (Don't know if this helps.)
May 27, 2009

physics
(Let me try to post that better, this site blocks URLs. "tinyurl" "." "com" "/oexysh")
May 27, 2009

physics
tinyurl (com) /oexysh (Do the same for the other terms.)
May 27, 2009

physics
F=MA=M*(v2-v1)/T where M=.15kg, v1=-36m/s, v2=45m/s, and T=.002s F=(.15Kg)*(45m/s-(-36m/s))/(.002s) F=(.15Kg)*(81m/s)/(.002s) F=(12.15Kgm/s)/(.002s) F=(6075Kgm/s^2) F=6075N
May 27, 2009

Chemistry
I got stuck.
May 9, 2009

Chemistry
You have a badly tarnished silver teapot. The tarnish is a result of the silver metal reacting with the oxygen in the air according to 4Ag(s) + O2(g) = 2Ag2O(s), Delta H = -62.2 kJ/mol You carefully clean the teapot and then, out of curiosity, you weigh it. The teapot has a ...
May 9, 2009

physics
thunder is heard 4.5 seconds after the flash of lightning is seen. How far away was the lightning flash and how long did it take for the light to reach him?
April 10, 2009

physics
so would it be (Iw^2)/(mv^2)?
April 6, 2009

physics
A projectile of mass m moves to the right with a speed vi. The projectile strikes and sticks to the end of a stationary rod of mass M, of length d, that is pivoted about a frictionless axle through its center. (a) Find the angular speed of the system right after the collision...
April 6, 2009

math
find the interval of convergence of the sum of ((x^1/2)/2 - 1)^k from k = 0 to infinity and within this interval find the sum of the series as a function of x. I know the interval is 0 < x < 16 but how do I get the sum?
April 5, 2009

math
thanks! i just found it in my notes too
April 5, 2009

math
what is the derivative of 2^x? I know that it's something with ln but I can't find it in my notes
April 5, 2009

Chemistry
Calculate the solubility of silver chloride in a solution that is 0.140 M in NH3.
April 5, 2009

English
where can I find a website for idioms tat are hard to find. An example is acts like a hotdog or full of soup.
April 2, 2009

maths
3 4 7 8 9 find the product of the smallest number
March 15, 2009

Business Law
one o the larger problems in doing business over the web is assuring electronic signatures. What are a few ways e-signatures might be more reliably authenticated?
March 13, 2009

Business Law
If all requirments of a negotiable instrument have been met except delivery. can/should payment depend solely on delivery? If so/not why?
March 10, 2009

calculus
evaluate the indefinite interval: x sec^(2)(9x) dx i know u=x du=dx dv=sec^(2)(9x) and v = 1/9tan9x....but i dont know where to go from there much help is appreciated
February 27, 2009

8th Grade Algebra- Answer Check
a times a + b times b =11 and a times b =3 what does a and b equals
February 25, 2009

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