May 30, 2016

Posts by dave

Total # Posts: 753

To what extent did events of the 1890s foreshadow events of the 1990s in the United States?? John or Dave or whoever (same IP address): Your question has already been addressed:
April 23, 2007

ELement A has a valence electronic structure of ns2np1. Element B has the valence electronic structure of ns2np5. Write a formula for the compound that would be formed from elements A and B. Element A has three electrons to lose to make the last shell eight. Element B has 1 ...
April 19, 2007

WHat happens to a pendulum's kinetic energy when it stops moving??? at the top? It has transformed to gravitaional potential energy.
April 19, 2007

Explain why acetic acid has four hydrogens, but is a monoprotic acid. Answered above under another name (John).
April 1, 2007

English Essay
CAn someone please find an analytical essay on David Sedaris' "ME Talk Pretty One Day". I would greatly appreciate it. You should be able to find something useful in this collection of sites:
March 26, 2007

What do strong electrolytes, weak electrolytes, and nonelectrolytes have in common? Severl things, I am sure, but one that comes to mind is that all are composed of cations and anions. That may not fit into your situation, however.
March 6, 2007

Would a substance that does not form hydrogen bonds have a high or low surface tension? What about vapor pressure, specific heat,heat of vaporization or boiling point? It requires extra energy to break hydrogen bonds so a substance that does not form H bonding can evaporate ...
March 6, 2007

What is the ratio of phenotypes in the offspring produced by the cross Aa x Aa, assuming complete dominance for the trait? a. 100% dominant (D) b. 100% recessive (R) c. 25% D, 75% R d. 50% D, 50% R e. 75% D, 25% R One gets AA, Aa, aA, aa so three of the four has a dominate A.
March 5, 2007

List the three main steps of aerobic cellular respiration. Which of these steps yields (by far) the most ATP? Here are two: Step One: Glucose enters the cell (insulin) and is split into 2 smaller 3 Carbon atoms called pyruvate. Total yield - 2 ATP Step Two: Pyruvate goes to ...
February 26, 2007

When oxygen is present a. most cells utilize aerobic cellular respiration. b. most animal cells will carry on fermentation and produce lactic acid. c. most bacteria and yeasts carry on fermentation. d. two ATP molecules are produced for each glucose molecule. e. most animals ...
February 26, 2007

Most reactions in the body occur too slowly on their own to sustain life. This is because: a. all reactions in the body are endergonic. b. many reactions require large inputs of activation energy. c. no catalysts are present in body cells. d. most biological catalysts are not ...
February 26, 2007

During the process of photosynthesis, solar energy is converted into: a. chemical energy. b. heat energy. c. thermal energy. d. mechanical energy. e. nuclear energy. a
February 26, 2007

What structural feature of a leaf allows CO2 from the air to enter the leaf? stomata
February 26, 2007

Which of these statements regarding enzymes is FALSE?
February 26, 2007

WHat are the structural formulas for glycerin, hexane, and ethanol. Do these structural formaulas support the solubility data obtained?? It is almost impossible to draw structural formulas on the computer. In line formulas may help. But you need to refine your question to ...
February 20, 2007

Based on the fact that calcium carbonate is an ionic compound, why is it insoluble in water???? Look up your solubility rules. I'm not really sure why, but I know my book states right off that Most sulfide, carbonate, and phosphate salts are only slightly soluble. Slightly...
February 18, 2007

Algebra II
Our current assignment is to find the LCM, Least Common Multiple of two polynomials. I think I'm doing it right but I'm not quite sure. For the first question: 2t^2+t-3, 2t^2+5t+3 I have 2t^2+t+3 as the LCM. Is this correct or can somebody step me through the correct ...
February 15, 2007

AP Chemistry
(a) What is the pH of a 2.0 molar solution of acetic acid. Ka of acetic acid = 1.8 x 10¯5 (b) A buffer solution is prepared by adding 0.10 liter of 2.0 molar acetic acid solution to 0.1 liter of a 1.0 molar sodium hydroxide solution. Compute the hydrogen ion concentration...
February 13, 2007

dude, this problem is impossible
February 12, 2007

When air pollution is high, ozone (O3) contents can reach 0.60 ppm (ie., .60 mol ozone per million mol air). How many molecules of ozone are present per liter of polluted air if the barometric pressure is 755 mm Hg and the temperature is 79 degrees F? I converted temperature ...
January 4, 2007

Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= tanx + secx My work so far: (sinx/cosx + 1/cosx + cosx/cosx)/(sinx/cos x - 1/cosx + cosx/cosx)= tanx + cosx (just working on the left side) ((sinx + 1 - cosx)/cosx)/((sinx - 1 + cosx)/cosx) ((sinx + 1 - cosx)/...
January 2, 2007

i need question 9 and 11 also volcanoes is 4 and tsunami is 12
January 2, 2007

I have a problem that I wasn't sure how to do, and I want to see if my reasoning behind getting the answer is correct. Question: If .0129 mol of N2O4 effuses through a pinhole in a certain amount of time, how much NO would effuse in that same amount of time under the same ...
January 1, 2007

Chemistry- partial pressures
A sample of gas collected over water at 42 degrees C occupies a volume of one liter. The wet gas has a pressure of .986 atm. The gas is dried and the dry gas occupies 1.04 L with a pressure of 1.00 atm at 90 degrees C. Using this information, calculate the vapor pressure of ...
January 1, 2007

Nitric acid can be prepared by bubbling dinitrogen pentoxide into water. N2O5(g) + H2O -> 2H+(aq) + 2NO3-(aq) a) How many moles of H+ are obtained when 1.50 L of N2O5 at 25 degrees C and 1.00 atm pressure is bubbled into water? b) The solution obtained in (a) after reaction...
January 1, 2007

English Essays
Can someone please find me essays describing ethos, pathos, logos, in Narrative of Frederick Douglas and Autobiography of Malcolm X? I would greatly appreciate it!!!!!!!!!! Thanks!!!!!!!!!!!! I assume that your assignment is to write essays about ethos, pathos, and logos in ...
December 27, 2006

I have a practice question that I am stuck on and need help. A certain insect pest has infested a cornfield. The pests are spreading through the field in a circular pattern at the rate of 3m/day. When the radius of the infested area is 70m. How fast is the area of the infested...
December 3, 2006

I was not the person who wrote that question last night? Chemistry - DrBob222, Wednesday, November 15, 2006 at 7:24pm Yes, it is possible in some cases. For example, CoCl2 is blue in the unhydrated form and pink in the hydrated form. As a kid, I used a water color brush to &...
November 16, 2006

a satellite is in geosynchronous orbit 36,000 km above earth. describe how you would fond the speed of this satellite.\
October 28, 2006

I need help with this problem:you live in the middle of a block that is square and one mile around. there is a stop sign on each corner. if your carcan only accelerate and brake at one meter per second per second, describe how you would get around the block in the fastest way...
October 28, 2006

What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? • Choose from any of the following topics when considering similarities and differences: o Level of assimilation o Relative ...
October 19, 2006

What are the most significant similarities between the Chinese American and Japanese American? when it comes to thePursuit of education? Education is a very high priority in all Oriental society.
October 19, 2006

If someone made the below statements to you, how would you explain that the statements are misconceptions? 1. Asian Americans and Pacific Islanders are a model minority. 2. Asian Americans and Pacific Islanders belong to a single "Asian American" culture. Do you ...
October 19, 2006

What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? • Choose from any of the following topics when considering similarities and differences: o Level of assimilation o Relative ...
October 18, 2006

8225 km
October 16, 2006

Rewrite the following sentences, focusing on the grammar area specified in the left column. To enter your answer, click next to the number and begin typing. If the sentence is already correct, write No Change. Punctuation within Sentences—Colon The book had some nice ...
October 10, 2006

Business Report Writing
Have you ever seen a communication with poor formatting that made it difficult to understand? Did the message lose some of its desired effect due to the problems? Yes I have. Yes it did.
October 10, 2006

WHy is the importance of being open to new ideas? This is a very vague question, but this is my thought: The question of the importance of being is open to new ideas because it is an unsolvable question. Being unsolvable, new perspectives will always come into play. The ...
October 7, 2006

I'll start with the first part of my problem. This is a long assignment since it is a weekend one. Part 1: Incomplete Comparative Balance Sheet. The percentage of Increases/decreases are to the side. And Accumulated Depreciation is listed twice. I'm assuming that is ...
October 1, 2006

How might one separate a mixture of water and salt? A solution of water and salt may be separated, if you don't want the water, by allowing the water to evaporate which will leave the salt crystals behind. If you want the water AND the salt, you may separate them by ...
September 9, 2006

History help!!!!!!!!
Why did the colonists react to the Coercive Acts with boycotts and convening the First Continental COngresss? in 1764, the British Parliament passed the Sugar Act. Many of the colonists were unwilling to pay tax which was imposed - this is what started everything. This was the...
September 3, 2006

Ok, if anyone is able to help me within the next 12 hours or so, that would be wonderful! I think I am going about this problem correctly -- I am not looking for someone to solve this problem for me, but for someone to tell me if I am doing it right... You can see this chapter...
August 31, 2006

Chemistry HELP!!
Can you identify a metal if you know its density? Explain Do you think that determining the volumes of metal samples by measuring their dimensions and calculating would be more r less accurate than determining volumes by water displacement? Explain. Would measuring the ...
August 29, 2006

#2 is A
August 15, 2006

1 question+chem!
#11) The information: An unidentified acid with a concentration of 1.0 mol/L has been given to you to identify. The acid appears in your data booklet on the Relative Strengths of Acids and Bases table. The following test results were recorded: 1. Methyl violet is yellow when ...
August 4, 2006

10. Suggest how two very different variables could be manipulated to increase the percent yield of sulphur trioxide. The equation for the reaction follows. 2 SO2(g) + O2(g)>>> 2 SO3(g) + energy Ok, I really dont know this one. Can you please help? Thanks! You need to...
July 24, 2006

LOL wow Go AXIA!!! Funny but sad at the same time lol
July 20, 2006

"le Chat. Principle" #2
Hi, there are 5 questions and I was wondering if you could check them for me. Thanks! 3. The hypothetical equilibrium reaction represented by the equation that follows. QA(s) + 2 X(g)>>>Q(l) + X2A(g) + energy This reaction can be shifted to increase the yield of ...
July 19, 2006

"le Chat. principle".
Hey, can you check this, this is regarding "le Chat. principle". Thanks! #1) The value of the equilibrium constant for the reaction H2CO3(aq) + energy >>> H2O(l) + CO2(g) can be changed by introducing a change to which component of the equation? My answer: ...
July 19, 2006

Has anyone read the book A People's History of the UNited States? if so, can you help me with a question about the first chapter? How does Zinn's story of first contact differ from your own prior knowledge of the story? I haven't read this text, but the reviews ...
July 18, 2006

Hey, can you help me on this question: Question: A 2.3 kg iron object is placed in an oxygenated tank of 1.00 mol/L hydrochloric acid. What volume of hydrochloric acid would react to completely consume the iron object? My question: when I seperate the H and Cl, and make the ...
July 17, 2006

chem. check
Can u please check these questions..thanks! Redox Stoichiometry 1.A 2.45g zinc metal strip is placed into an 2.3 x 10-1 mol/L solution of tin (II) bromide. If all the zinc and tin (II) bromide react, what was the volume of the solution. My answer: 8.62L is the volume of the ...
July 12, 2006

help me asap
hi I'm taking sat II lliterature test and i was wondering if you can give me a site where i can take a practice test online for free. Check these sites.
June 24, 2006

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