Friday
October 24, 2014

Posts by Regina


Total # Posts: 171

chemistry
Given the following chemical reaction: Zn+HCl-->ZnCl2+H2(g) If you measured the total volume of collected gas over water at 20 degrees celcius t be 428ml at a total pressure of 845 torr, how many milliliters of 2.6M HCl would be required to produce the correct amount of ...
December 4, 2010

chemistry
Given the following reaction: Pd(NO3)2+CaSO4-->PdSO4+Ca(NO3)2 If you started with 225.6ml of 6.32M CaSO4 and the percent yield of this reaction was ol 78.2%, what is the actual yield of grams mod of PdSO4?
December 4, 2010

chemistry
How many photons of frequency 2.7*10^14 Hertz would be needed to light a 60 Watt light bulb for 1hr?
December 4, 2010

chemistry
The new vapor pressure of a solution of 3.25g of an unknown compound in 22.35g of H2O is 114.9mmHg at 55 degrees Celcius. What is the molar mass of the unknown compound?
December 4, 2010

chemistry
A compound is composed of 19.998% carbon, 3.331% hydrogen, 23.320% nitrogen, and 53.302% Oxygen. Its molar ass is 120.07 gram/mole. What are the empirical and molecular formulas?
December 3, 2010

chemistry
If you have a 29.6 mass percent KCl in benzene,what is the new boiling point?
December 3, 2010

12th grade
height of the tree O ________________________ = __ Tan 25= Cast shadow of the tree A 41 Cast shadow = ________ tAN 25 = 87.9
December 2, 2010

algebra
Mr. Miller says, Plan on a quarter pound of hamburger per person." There are 21 people in the class, including Mr. Miller and us." How much money should be collected for the cost of each burger in each student? if Hamburger Meat: $1.49 per pound ( limit: 5 pounds per...
December 2, 2010

chemistry
iatrochemistry -what is it? -who created it? cant use wikipedia :s thanks!
October 16, 2010

CHEMISTRY
iatrochemistry -what is it? -who created it? (facts about him/her)
October 16, 2010

algebra 2
81x2-18x+1
September 28, 2010

algebra
P=2l +2w 222 = 2(w+47) + 2w 222= 2w +94 +2w 222=4w+94 222-94=4w+94-94 128=4w 32=w so length = w+47 length = 32+47=79
September 14, 2010

geometry
the other slice will be 80 degrees since the other is 60.
September 14, 2010

macroeconomics
Atlantis is a small, isolated island in the South Atlantic. The inhabitants grow potatoes and catch fresh fish. The accompanying table shows the maimum annual output combinations of potatoes and fish that can be produced. Obviously, given their limited resources and available ...
August 3, 2010

Sci120: Dependance of man on the enviroment
bogus analysis using quasi-scientific jargon, but has little or no objectivity
June 24, 2010

math
what 2 numbers come next 4, 16, 32
May 19, 2010

math
0.6
February 11, 2010

com/150
which is a vague pronoun and why? this increasing pollution is a big problem or this is a big problem
January 11, 2010

Math
The slope of the line y=3/2x+4 is changed to 5/6 but the y intercept remains the same. What is the equation of the new line?
December 13, 2009

4th grade New
I got 18. How did you get your answer?
December 3, 2009

4th grade New
Jason is thinking of a number. He adds 8, multiplies by 2, subtracts 4,and then divides by 2. The result is twenty-four. What number is Jason thinking of?
December 3, 2009

4th grade
4:30 p.m. thanks Ms. Sue
December 3, 2009

4th grade
Kenny wants to get to the pool 25 minutes before the pool opens. It takes him 20 minutes to drive, and 15 minutes to pack up. At what time should he start packing up if the pool opens at 5:30 p.m.?
December 3, 2009

literature
in line 4 what does Fairy king attend and mark I do hear the morning lark
November 24, 2009

literature
the best in this kind are but shadows is
November 24, 2009

literature
in life without principle thoreau writes I would have had him deal with hisprivated experience as the poet does what does this mean
November 24, 2009

literature
What does the narrative of Sojourmer truth take place
November 24, 2009

literature
The form of the poem God's Grandeur is that of
November 24, 2009

thca 230
what types of reform effort is being implented to improve caregivers socialization skills
November 8, 2009

algebra (slope)
find the value of y so that the line passing through the two points has the given slope. (8.y), (2,-3), m=1/2
October 5, 2009

algebra
I'm still kind of confused =S
October 5, 2009

algebra
find the value of y so that the line passing through the two points has the given slope. 1. (6,y), (3,3). m=2/3 2. (8,y), (2,-3). m=1/2 I know the formula: y2-y1/m2-m1 and I've been trying to do this for a long time now, but I still don't get it. please help. thanks!
October 5, 2009

maths
write the equation in slope-intercept form. then graph the equation. 1. 6x-4y=3 2. 2y+5x=10 can you please help me with at least one of them? thanks! also, where it says 'then graph the equation', I know we can't graph here, so you can ignore that. but if you know ...
October 3, 2009

MATH
d. not given it should be seven thousandths
October 3, 2009

math
188oz
October 3, 2009

MATH
c. 4 and 5 (it's 4.5825757, 4 and 5 are the closest to that number)
October 3, 2009

maths
in 1992, a software company had a profit of $30,000,000. in 1998, the company had a profit of $210,000,000. find the average rate of change of the company's proft in dollars per year. I have no idea how to this. please explain step-by-step.. thnxx
October 3, 2009

maths
find the x-intercept of the graph of the equation: 1. 4x-5y=8 2. 3y-10x=4 answers that I got: 1. x=2 2. -2/5 ___________________________________ find the y-intercept of the graph of the equation: 3. 7-12x=3y 4. 4y+9=5x my answer: 3. 2 1/3 4. 2 1/4 can you pleae check if they&#...
October 3, 2009

5th Grade Math
Habor seal aquarium =) 300,000 by 0.20 equals 60,000 (habor seal)
October 3, 2009

chemistry.
Pt: about 195 g/mol if I'm not mistaken..
October 3, 2009

literature
can you come up with any symbols in "to kill a mockingbird"? I already have the mockingbird as a symbol.. any other? thank you
October 1, 2009

reading
needd a answers to a lesson to remember
August 29, 2009

Math
Jimmy is traveling at a speed of 60 mi/h. What is his speed in feet per second?
August 15, 2009

Math
The United States emitted 19.5 million t of nitrogen oxides (NO) into the atmosphere in 1987. One metric ton (1 t) equals 1,000 kg. How many kilograms of NO were emitted to the atmosphere in the United States during 1987?
August 12, 2009

law and ethics in medicicine
If Dr. Jones is practicing "defensive medicine," whiat is likely to be his motivation for doing so?
August 10, 2009

math
At what rate would a 120-pound person burn calories while bicycling at 12 mi/h?
August 7, 2009

Math/115
How many hours would a person have to jump rope in order to lose 1 pound? If a person uses 750 cal/h. A person needs to burn off 3,500 calories more than he or she takes in to lose 1 pound. I need to know how to set up the problem and I can figure out the answer.
August 7, 2009

math
How many hours would a person have to jump rope in order to lose 1 pound? If a person uses 750 cal/h.
August 7, 2009

pre-statistics
Days Stayed Frequency 3 60 4 51 5 14 6 22 7 8 What is the probability a patient stayed at least 5 days? (Round to the nearest thousandth)
February 6, 2009

math,pre statistics
Two dice are rolled. What is the probability that it is not doubles?
February 6, 2009

Economics
Jim signed a new deal for $10 million with the Toronto maple leafs. THe terms of the contract were 1 million immediately and 800,000 per year for the next 5 years (first payment after 1 year) and $1 million per year for the next 5 years (first payment at year 6). If jim's ...
January 24, 2009

French
Hi there, can you see if i have translated the english djibouti anthem correctly into French. Djibouti National Anthem Arise with strength; for we have raised our flag, The flag which has cost us dear With extremes of thirst and pain. Our flag, whose colours are the ...
January 17, 2009

algebra
(x+y)2#x^2+y^2
January 11, 2009

3rd grade
Shatter and Break have the same sound as batter and stake. I'd go with B on that one. That's the best I can come up with!
November 20, 2008

9th grade
In a crystal how are the atoms arranged?
November 4, 2008

math(Please help!!!)
ummm sorry
November 4, 2008

physics
does anyone know the fundamentals of measure units?? thank you
October 29, 2008

Literature Invisible man
doesnt the theme of mutual complex fate (modernism) go against the other theme of self reliance?
October 23, 2008

biology
A cytology student believes he has identified an individual suffering from monoploidy. The instructor dismisses the claim. Why was the claim dismissed? What type of cells were being viewed.
March 9, 2008

Science
Hey John I don't think it's a joke. (really) The country I am sad to say is really like DUMB (sorry to say that) Your not the only one. But if I tell any teacher that they would be like so mad! So many people are proud of the country! at least one American is smart ...
November 7, 2007

Math -- Statistic types used in public speaking
Thanks PSYDAG -- I am going to try to get my brain in gear and understand. I appreciate your time and information.
October 6, 2007

Math -- Statistic types used in public speaking
This is actually in my communications class. I have to decide which is the best statistic type is best to use in my speech. (mean, median or mode) I am struggling to decide which statistic would be used to support the following assertions? Louisiana’s educational system ...
October 6, 2007

MATH
find the domain of the function f(x)=2x
September 10, 2007

elderly people
Which were the roles of elderly people in mesopotamy,egypt,greece or rome? Here are previous answers to this question. Please read through as many as possible. http://www.jiskha.com/search/search.cgi?query=elderly =)
April 20, 2007

history
How elderly people lived in ancient Rome and Greece? About 5 percent of ancient Rome's population was over age 65. Considering that Rome's population was about one million in 5 B.C., about 50,000 of the people were over age 65. Sources: http://www.utexas.edu/depts/...
January 14, 2007

Math
An advertisement for a pineapple drink claims taht the drink contains 15%pineapple juice. How much pure pineapple juice would have to be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice? Let's look at how much pineapple is in it now. 8 ...
December 14, 2006

Math
An advertisement for a pineapple drink claims taht the drink contains 15%pineapple juice. How much pure pineapple juice would have to be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice? This is a mixture problem. Pineapple drink + pure juice...
December 14, 2006

social studies (elderly people)
How third age people live in America, Africa and Asia, which is the different roles they play in different societies. (I am 11 years old) It's difficult to generalize about the roles of the elderly in such large continents. In general, Asian senior citizens tend to be ...
December 10, 2006

science
if current theory predicts global warming what do you think might be contributing to temporary global cooling?how could this happen? http://en.wikipedia.org/wiki/Global_cooling Global cooling is a myth, at least as for as mainstream science is concerned.
October 17, 2006

sociology
this is too funny I am a axia student in the same ethics class in march of 2010 looking for the same answer as everyone else here was.
July 20, 2006

chem
MW:CH4N2O(Urea) 60g/mole x 245/1000000 x .100L = .00147g urea. So weigh out .00147g urea and mix it with water in a volumetric flask up to exactly 100mL. Since 1ppm =1mg/1kg or 1/1000000
June 27, 2006

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