Most popular questions and responses by Ezra
  1. Poetry 7 - Check please!

    Why, who makes much of a miracle? As to me I know of nothing else but miracles, Whether I walk the streets of Manhattan, Or dart my sight over the roofs of houses toward the sky, Or wade with naked feet along the beach just in the edge of the water, Or

    asked on February 24, 2016
  2. Chemistry

    Nitrogen & hydrogen goes react to form ammonia gas as follows: N2(g)+3H2(g)-->2NH3(g) At a certain temperature & pressure, 1.2L of N2 reacts with 3.6L of H2. If all the N2 and H2 are consumed, what volume of NH3, at the same temperature & pressure will be

    asked on November 3, 2012
  3. Chemistry

    Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is: C2H2(g) + 2H2(g) === C2H6(g) Given the following, what is the Kp for the reaction? C2H2(g): 209.2 ΔG˚!@#$%^&J/mol) H2(g): 0 ΔG˚!@#$%^&J/mol)

    asked on March 31, 2013
  4. Chem

    A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide reacts with calcium oxide to form solid calcium sulfite. If the coal is burned in a power plant that uses 1800

    asked on September 17, 2012
  5. Chemistry

    Rank the given compounds based on their relative Brønsted acidities. H-I, H-F, H-SH, H-NH2, H-CH3. I thought it correlated with whichever element was more electronegative was also more acidic. An explanation would be much appreciated.

    asked on September 8, 2013
  6. Chem

    Calculate the number of grams of Fe formed when 0.300kg of Fe2O3 reacts. Equation: Fe2O3+CO-->Fe+CO2 converted .300kg to 300g Balanced Fe2O3+3CO-->2Fe+3CO2 So I started by trying this: 300gFe2O3(1molFe2O3/159.687gFe2O3)...and then I don't know where I

    asked on September 16, 2012
  7. Chemistry

    Which do not obey the octet rule? Check all that apply. NO BF3 ICl2^- OPBr3 XeF4 An explanation would be appreciated, thanks.

    asked on November 19, 2012
  8. Chemistry

    How would I go about creating a Lewis Dot structure for the Calcium Carbonate and Magnesium Hydroxide? I know how to do it for any compound with two elements such as SF5, but I don't know how to approach it when there's a polyatomic ion involved and there

    asked on November 6, 2012
  9. Chem

    Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.30 g of sodium carbonate is mixed with one containing 3.00 g of silver nitrate. How many grams of each of the

    asked on September 16, 2012
  10. Calculus

    A cup of hot chocolate has temperature 80 C in a room kept at 20 C.? After a half hour the hot chocolate cools to 60 C. a) what is the temperature of the hot chocolate after another half hour? b) when will the chocolate have cooled to 40 C? I think I know

    asked on October 10, 2013
  11. Chemistry

    The value of Kc for the reaction below is 1.6 C(s)+CO2(g)=2CO(g) What is the equilibrium concentration of CO when [CO2]=.50M? The usual ICE table doesn't work for me. C(s)+CO2(g)=2CO(g) I - 0 C -x +2x E .50 +2x 1.6=[2x]^(2)/(.50) That's how I did it but

    asked on March 22, 2013
  12. Chem

    How many moles of ammonium ions are in 8.794g of ammonium carbonate? I got .1832 as an answer and I was told that I was very close and I just may have done some kind sigfig or calculation error but I have no idea what it is since I did this problem so many

    asked on September 16, 2012
  13. literature

    2. Studying the plot elements in "A Pair of Silk Stockings," you might reasonably conclude that the essence of her story A. is found in its sensual descriptions. B. reflects the despair of daily life. C. emphasizes the hardship of poverty. D. is identical

    asked on May 7, 2014
  14. Chemistry

    What is the zeff value for a valence electron in an oxygen atom? An explanation would be much appreciated.

    asked on October 30, 2012
  15. Chemistry

    Consider the gas-phase transfer of an electron from a sodium atom to a chlorine atom: Na(g)+Cl(g)-->Na^(+)(g)+Cl^(-)(g) I was able to write the reaction that relates to an ionization energy and that relates to an electron affinity. I broke it up into:

    asked on November 3, 2012
  16. Calculus

    What is the limit (as u--->2) of square root(4u+1)-3/u-2. I got 1 as an answer, but I want to check if that's right. I heard it could be something else so I'm unsure and doubtful of my answer.

    asked on September 16, 2013
  17. Chemistry

    The solubility of iron(III)hydroxide is 4.39E-10M. What is the Ksp for this compound? I don't know how I would go about this problem.

    asked on March 21, 2013
  18. algebra

    What is the equation for the line of best fit that matches the data shown in the table and in the graph? x y -7 9 -3 6 -1 3 2 1 6 -1 A. y = 0.79x - 3.12 B. y = -0.79x + 3.12 C. y = 3.12x - 0.79 D. y = -3.12x + 0.79 i can't show the graph here but it's

    asked on November 13, 2013
  19. Chemistry

    Nitrogen and hydrogen gases react to form ammonis gas as follows: N2(g)+3H2(g)-->2NH3(g) At a certain temperature and pressure, 1.2L of N2 reacts with 3.6L of H2. If all the N2 and H2 are consumed, what volume of NH3 at the same temperature and pressure

    asked on December 12, 2012
  20. Chemistry

    What is the maximum number of electrons in an atom that can have the following quantum numbers? n= 4 ml= -3 ms= +1/2 How would you figure that out given those information? What's the process of that?

    asked on November 4, 2012
  21. Chemistry

    In the ground-state electron configuration of Fe^{3+}, how many unpaired electrons are present? An explanation would be great, thanks.

    asked on October 31, 2012
  22. Calculus

    Find a number, delta, such that if |x-2|

    asked on September 7, 2013
  23. Unit of Inquiry

    I am a 5th grade student and my group has to research this question. I have to turn it in tomorrow and was given the assignment today. I am stuck can you please help? Thanks The question is: Why do people make things that ruin the environment?

    asked on February 23, 2009
  24. MATHS


    asked on July 19, 2016
  25. algebra

    What is the equation of the line that is parallel to 8x - 5y = 2 and goes through the point (-5, -2) ? A. y = 8/5x + 6 B. y = 8/5x + 10 C. y = 8/5x - 6 D. y = 8/5x - 10 i'm guessing this would be D, or possibly B.

    asked on November 13, 2013
  26. Evolutionary Bio

    I was wondering if someone could explain to me how two haploid mating types can form a diploid. Also could someone explain the haplodiplontic life cycle? I would very much appreciate it.

    asked on October 30, 2012
  1. Math


    posted on March 28, 2019
  2. Physical Ed

    Lun is correct! 1. b 2. a 3. d 4. b 5. d 6. a 7. c 8. c 9. c 10. a, b, d 11. a, c, d 12. d 13. a 14. a, c, d I got 20/20 100%

    posted on January 9, 2018
  3. Poetry 7 - Check please!


    posted on February 24, 2016
  4. Poetry 7 - Check please!

    Is is C?

    posted on February 24, 2016
  5. math

    find the original price of a pair of shoes if the sale price is $51 after a 25%discount

    posted on November 23, 2015
  6. algebra

    thank you!

    posted on November 13, 2013
  7. Calculus

    I did it by multiplying by the conjugate. I'm not sure of how to do it any other way. Can you explain how that works?

    posted on September 16, 2013
  8. physics

    u=0.5*qv u=0.5*25*100 u=1250

    posted on March 14, 2013
  9. Chemistry

    Could you provide more explanation as to where those numbers came from?

    posted on December 14, 2012
  10. Chemistry

    Never mind, I got it.

    posted on November 19, 2012
  11. Chemistry

    I'm still not quite sure how you were able to figure that out.

    posted on November 4, 2012
  12. Chemistry

    Part B: Use the result from part A, data in this chapter (Chapter 7:Periodic Properties of the Elements), and Hess's law to calculate the enthalpy of the above reaction. Part A is: Na(g)--> Na^(+)+e^(-) Cl(g)+ e^(-)--> Cl^(-)(g)

    posted on November 3, 2012
  13. Chemistry

    Thanks so much, that really helped me understand it.

    posted on November 3, 2012
  14. Chemistry

    Thanks so much, that really helped me solve other problems.

    posted on November 1, 2012
  15. Chem

    Yeah, I ended up getting it. It was a calculation error and I got the equations as well; I had to have two with the phases. Thanks.

    posted on September 17, 2012
  16. Chem

    Still got it wrong. I converted from tons to grams, still no good.

    posted on September 17, 2012
  17. Chem

    Ah, ok. Thanks for all the help.

    posted on September 17, 2012
  18. Chem

    So I followed that and got 168.58 and I put it as a scientific notation since it wanted only two sigfigs (1.7E2, I had to round as well), but it was wrong.

    posted on September 17, 2012
  19. Chem

    I tried to convert the tons to grams and got 7.2E7, but that ended up being wrong. I also need a balanced equation.

    posted on September 17, 2012
  20. Chem

    Could you show me step-by-step how to find the limiting reagent? That's the part I get a little confused in.

    posted on September 17, 2012
  21. Chem

    I got the answer (210grams). Thanks.

    posted on September 16, 2012
  22. Chem

    Just to clarify, when I convert from moles to grams, do I double Fe because it has the coefficient 2?

    posted on September 16, 2012
  23. Chem

    Yeah, I balanced it already; I put it up. My teacher didn't do this, that's why I didn't know how to start, but is that pretty much all I have to do? That extra multiplication/division?

    posted on September 16, 2012
  24. Chem

    Yeah it was that last digit that threw me off. Thanks for the help. I rounded early so the calculation came out different.

    posted on September 16, 2012