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December 21, 2014

Posts by zoe


Total # Posts: 172

chemistry
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010

Economics
Quality Adjusted Life Years evaluates interventions in _____ rather than _____. a. dollars; years b. utility; dollars c. years; dollars d. dollars; utility
April 19, 2010

Chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
April 16, 2010

Chemistry
Ammonium carbonate decomposes upon heating according to the following balanced equation: (NH4)2CO3(s)-->2 NH3(g)+CO2(g)+H2O(g) Calculate the total volume of gas produced at 25 C and 1.07atm by the complete decomposition of 11.86 g of ammonium carbonate.
April 16, 2010

Chemistry
oh i think you have to convert the mm Hg to atm first
April 16, 2010

Chemistry
dont you just multiply .038 times the total pressure?
April 16, 2010

Chemistry
okay yeah i got it. thanks its 736 mmhg
April 16, 2010

Chemistry
how do i know the water vapor pressure at 25C though?
April 16, 2010

Chemistry
The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 C and a total pressure of 760 torr . what is the partial pressure of the gas?
April 16, 2010

Advanced 6th grade Math
i still dont get it
April 12, 2010

Advanced 6th grade Math
What is the sample space of expiremental probibility
April 12, 2010

art 101
it is a
April 12, 2010

6th Grade Grammar
yeah definitly a
March 17, 2010

CRT205
(I did not get some answers correct on this categorizing fallacies assignment. It was graded but not with the correct answers. Can someone help me by telling me which type of fallacies the below statements are please so I can understand better. Thank you!) 1.My friend, who ...
March 8, 2010

2nd grade
Why is it helpful for scientists to know how long animals can live?
March 1, 2010

Molecular biology
What is the importance of the tertiary structure of a tRNA? I know the structure, but I'm not sure what is the importance of it. Is it stabilization?
February 24, 2010

Algebra
2(x+5)/(x+5)(x-2) = 3(x-2)/(x-2)(x+5) + 10/(x+5)(x-2) I know I have to get 2(x+5) = 3(x-2) but I don't know the intermediate steps. I tried canceling out to get 2/(x-2) = 3 + 10 / (x+5) and gross multiplying but that wouldn't make sense.
February 24, 2010

Physics
Oh picture looks like this 4q----a----q | | | | a a | | | | 5q----a----5q
February 1, 2010

Physics
Four charged particles are at the corners of a square of side a, as shown in the figure below. (A = 4, B = 5, C = 5.) (a) Determine the magnitude and direction of the electric field at the location of charge q. (Use k_e for the Coulomb constant and q and a as necessary.) ...
February 1, 2010

Physics
A proton accelerates from rest in a uniform electric field of 620 N/C. At one later moment, its speed is 1.30 Mm/s (nonrelativistic because v is much less than the speed of light). (a) Find the acceleration of the proton. m/s2 (b) Over what time interval does the proton reach ...
February 1, 2010

Biology
I don't understand how to do this at all!! I've been Googling the past hour and I just don't get it. My teacher won't respond and my exam is tomorrow. I get that we cleave with an acid and then we can do amino acid analysis. The entire protein can be pieced ...
January 27, 2010

home economics
name two macronutrients and two micronutrients
January 14, 2010

Physics
By what factor would you have to decrease the tension in a stretched string in order to decrease the wave speed by a factor of 3.5? I know that v = sqrt(T/u) but am confused as to what to do?
January 11, 2010

Physics
A particle executes simple harmonic motion with an amplitude of 9.00 cm. At what positions does its speed equal two thirds of its maximum speed? I got: v2 +ω^2x^2 =ω^2A^2 vmax =ω A and v = ωA/2?
January 4, 2010

Physics
A particle executes simple harmonic motion with an amplitude of 9.00 cm. At what positions does its speed equal two thirds of its maximum speed?
January 4, 2010

Health Care Reimbursement Methodologies
Your hospital has just received a reimbursement rejection from the fiscal intermediary for two outpatient procedures that were performed on the same day. This rejection was probably generated by
October 22, 2009

Physics
The water in a river flows uniformly at a constant speed of 2.53 m/s between parallel banks 69.8 m apart. You are to deliver a package directly across the river, but you can swim only at 1.74 m/s. (a) If you choose to minimize the time you spend in the water, in what direction...
October 12, 2009

Physics
The water in a river flows uniformly at a constant speed of 2.53 m/s between parallel banks 69.8 m apart. You are to deliver a package directly across the river, but you can swim only at 1.74 m/s. (a) If you choose to minimize the time you spend in the water, in what direction...
October 12, 2009

tourism
What's the difference between a marketing consortia and a hotel refferal system?
October 10, 2009

math
Hi, I wrote the first one wrong... The hawks won 17 more hockey games than they lost. They played 52 games in all and had 3 ties. How many games did they lose? This is what I did so far... 52 games ...-17 ------ 35 okay now there is 3 ties??? so they had 35 games left.. is ...
October 8, 2009

math
The hawks won 17 hockey games than they lost. They played 52 games in all and had a 3 ties. how many games did they lose? so 52 ..... games in all won 17......games ties.........3 this is what I do 52 - 17 ------ 35 so they had 35 games left. From here I am stuck DO I ADD 3 ...
October 8, 2009

Physics
C.) What is her average velocity over the entire trip? I was wondering how it is that we find out the velocity? I know that velocity would be change in X/change in time, but for the way the problem was set up, I'm not sure how to go about solving it.
October 8, 2009

Physics
A person walks first at a constant speed of 4.70 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.80 m/s. (a) What is her average speed over the entire trip? (b) What is her average velocity over the entire ...
October 8, 2009

Physics
I got close! I tried to solve it and cancelled things out, to which I got A=0, B=1, but I can't seem to get C right. I thought C would = 0, but apparently that's wrong. Any clues as to where it went bad?
October 4, 2009

Physics
Your answer from part b is rate = ??m3/s ??m3/sec x sec = m3 Solve for sec. Then convert sec to hours. sec x (1 min/60 sec) x (1 hr/60 min) = ?? --------------- So I have the rate 4.73e-4 m3/s. I'm not sure how the cancellation for the m3 to disappear, but I get the ...
October 4, 2009

Physics
Assume it takes 6.00 minutes to fill a 45.0 gal gasoline tank. (1 U.S. gal = 231 in.3) I don't know how to solve for part C. (a) Calculate the rate at which the tank is filled in gallons per second. ANSWER: 0.125 (b) Calculate the rate at which the tank is filled in cubic ...
October 4, 2009

physics
A surveyor measures the distance across a straight river by the following method. Starting directly across from a tree on the opposite bank, she walks 90 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from her baseline to the tree ...
October 4, 2009

computers
in which program does the default show you the hierarchy of drives, folders, and files in a split window
July 9, 2009

Finite Math
Thanks Reiny!!!
February 24, 2009

Finite Math
A "hand" consists of a set of 5 cards selected from an ordinary deck of 52 cards: (1) How many different hands contain exactly 4 diamonds? = 27885 (2) How many different hands contain exactly 4 cards of the same suit (any of the four suits)? (3) How many different ...
February 24, 2009

math
The answer is 92. Anyone have idea how to solve this or why the answer is 92? Thanks in advance!
February 21, 2009

math
Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents? I know that the total outcomes equals 120, but how do I find how many of these have the value of...
February 21, 2009

Social Studies
hi! cultural diffusion is when two groups come together to make new ideas like if two districs come together to plan new ideas like a spread or school board meeting for good new ideas
January 30, 2009

world geography
what factors account for the simmilarities and differences between the subdivisions in tropical climate zones?
January 21, 2009

3rd grade
SYRYTRYWTYW
November 12, 2008

japanese :)
Dear SraJMcGin, Can you let me know where to translate English to Kanji Yours Truly Zoe
November 8, 2008

re -same question again
sorry to post this question again but i am having trouble finding evidence of what jesus did not do . i don`t really understand the question like i mentioned in my last post does it mean that he did not get married or have children . i can`t find anything i can print off. i ...
September 24, 2008

year 8 re
i need to find 3 pieces of evidence of what jesus did and 3 things what jesus didn`t do. for the 3 things jesus did i have found feeding the 5000 , walking on water and healing the sick but i am having trouble finding evidence for what jesus did not do. does it mean not ...
September 23, 2008

ict
please could someone help i need to give 4 answers . what is needed to access the internet? thanks
September 15, 2008

music
can you tell me where to find free music notes for guitar and paino, thx.
September 10, 2008

COM220
Do you think Eliminating Negative Thinking is a controversial, supportable and sound topic for a research paper?
July 2, 2008

COM220
Thanks for everything
June 28, 2008

COM220
The things I mention to Sue about what I want to research about changing your thinking is to much. I will follow GuruBlue's suggestions. I just want to know am I going in the right direction with this topic.
June 28, 2008

COM220
The paper is just 2,000-2,500 words.
June 28, 2008

COM220
Thanks for your suggestion.
June 28, 2008

COM220
I have no idea on how i intend to research this topic. I want to challenge myself in finding information in this matter. What i mean by the topic of choice is how to overcome frustration, ways to communication effectively,dispute negative thinking and to recongnizing fautlty ...
June 28, 2008

COM220
Is this a good topic for a reserach paper? How to change your thinking? If not could you give some advice in this direction, Thanks
June 28, 2008

Psychology
Thanks! I will revise it
May 7, 2008

Psychology
Change your thinking(Title of my reseach paper) How do I plan to support my thesis with compelling arguments and counterarguments. My thesis statement is," Even though we experince situation that demonstrate this simple principle- the way we think determines the we feel&...
May 7, 2008

3rd grade math
6.7
April 29, 2008

design technology
i`m finding it hard to find the answers to these questions for my homework . i know these questions have been asked before but i can`t find the answers from the websites people have been kind enough to find. Why is wool warmer than silk? why is silk stronger than wool? why is ...
April 13, 2008

spanish
I need to describe my spring break in Spanish day by day. I think she said present-tense, I copied this chart off the board. AR Yo e Nos amos ER Yo e Nos imos-emos Is that present? So my question is, in that tense, how would I say "I go"?
April 7, 2008

ap physics
I need some help with the following problems. I got no idea how to do it...PLEASE HELP!!!!THANKS A LOT!! A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and , after...
March 22, 2008

language
How can you tell a valid opinion from a bias opinion? I realize when they are obviously slanted, but what makes an opinion valid?
January 13, 2008

History
Was Venice, Italy always flooded by water? Was it made on-top of the ocean, or was it made, and later flooded?
October 13, 2007

science
what are the major abiotic and biotic factors in a coniferous forest?
October 9, 2007

science
infinte use to find math two words seventenn letters for crossword puzzle
August 21, 2007

Math
How do you write equations for perpendicular lines? I will assume you know how to find the equation of a line if you know the slope and a point on that line. The key thing to remember is: Two perpendicular lines have slopes that are opposite reciprocals of each other. e.g if ...
July 22, 2007

Egypt
What was the importance of Anubis to Ancient Egyptians? The jackal-god of mummification, he assisted in the rites by which a dead man was admitted to the underworld. Anubis was worshipped as the inventor of embalming and who embalmed the dead Osiris and thereby helping to ...
February 5, 2007

Music
Can anyone tell me how the basso continuo changed through the baroque to the classical period? Thank you for using the Jiskha Homework Help Forum. Hopefully the following site will help you: http://www.medieval.org/emfaq/misc/continuo.html
December 28, 2006

the big idea of energy
omg i have to do the iron and sulphur reaction as well and i dont think i know what the big idea of energy is... but here's what i found :S basically the big idea of energy is the rule that energy cannot be created or destroyed, it just changes form. i dont get it so i ...
December 5, 2006

math/unit rate
A unit rate is like 42 cupcakes in 3 boxes. how many cupcakes in each box. a unit rate is comparing 2 items.
September 26, 2006

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