dexter

Popular questions and responses by dexter
  1. Chemistry

    please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) +2 +4 +2 +4 Zn(s)->Zn2+(aq)+2e-

    asked on June 16, 2011
  2. chemistry

    Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would prepare this solution. Include any calculations that you would perform.

    asked on October 14, 2010
  3. math

    Barbara knows that she will need to buy a new car in 4 years. The car will cost $15,000 by then. How much should she invest now at 10%, compounded quarterly, so that she will have enough to buy a new car? Round to the nearest cent.

    asked on April 11, 2010
  4. Chemistry

    Following question I need help with part b) Please verify my answer for part a) too if possible. Consider the following reaction for silver tarnishing: 3Ag2S(s) + 2Al(s) -> 6Ag(s) + Al2S3(s) a. State the oxidation number for each element in the reaction.

    asked on June 14, 2011
  5. math

    If a farmer has one square mile of land and he divides his land into square fields that are 1/3 mile long and 1/3 mile wide,how many fields will he have?

    asked on September 1, 2016
  6. fsu

    Red light has a wavelength of 691 nm. Convert this wavelength to meters.

    asked on October 10, 2011
  7. Algebra

    I've been working at this for some time and have been unsuccessful. I know i'm supposed to use the principle interest formula but that's all. I think i'm missing something Rebecca put $24,000 in an education account on the day her daughter was born. If the

    asked on October 9, 2015
  8. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked on June 17, 2011
  9. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked on June 17, 2011
  10. Chemistry

    Please help me verify: The following reactions are involved in the formation of acid rain. Use oxidation numbers to identify which of these reactions are REDOX reactions. a. 2SO2(g) + O2(g) �� 2SO2(g) -2 -2 0 -2 -2 No change - not REDOX

    asked on June 16, 2011
  11. Chemistry

    Please help me verify the following question: Consider the following ion; XF2-2 What is the oxidation number assigned to element “X”? Show your work My answer: X F2-2 X -1(-1) X -3=0 X = +3 Please let me know if right. Many thanks!

    asked on June 14, 2011
  12. Social Studies

    does eastern canada primarily speak french

    asked on September 26, 2018
  13. 5th grade math

    If a farmer divides his land into square fields that are 1/2 mile long and 1/2 Mike wide how many fields will he have

    asked on September 1, 2016
  14. math

    the average mark of 10 students is 8. the total mark for the group is? A)16 B)18 C)95 D)105

    asked on August 9, 2016
  15. Chemistry

    when 2g of NaOH were dissolved in 149 g of H2o in a calorimeter at 24 degrees C the temperature of the solution went up to 29 degrees C. If the calorimeter constant was 11 cal/C find delta H for the solution of one mole of NaOH in H2O

    asked on October 19, 2014
  16. math

    83 3rd graders 115 4th graders 150th graders all the 5th graders will be on one side and all the 4th graders will be on the other side the 3rd graders will be split up so that the two sides will have equal number of student how many 4th graders ?how many

    asked on September 30, 2014
  17. Area of rectangle

    The length of the flag needs to be 1.9 times the height. If the flags height is 3 feet, then what is the area of the flag?

    asked on April 16, 2014
  18. science

    What is the gram formula mass of NaC2H3O2 multiplied by 10H2O

    asked on February 24, 2013
  19. english literature

    witty characteristics of Touchstone in as you like it

    asked on July 10, 2012
  20. Math

    Hi I have a sample question for a math assessment that I wanted to ask about: What number is expressed by (9 x 6) -s- 3? a 18 b 27 c 6 d 21 Which of these answers is right and what is "s" suppose to mean? Is S like some sort of fixed value?

    asked on June 16, 2011
  21. Chemistry

    Hi there - I'm going to post the question as written in my book. Three 20.0 mL samples of nitric acid are titrated with a 0.200 mol/L solution of sodium hydroxide. The results for the three trials are shown in the table below. What is the concentration of

    asked on June 5, 2011
  22. math

    Plywood is sold in rectangle sheets 4 feet wide and 8 feet long. How many 4x8 sheets of plywood are needed to completely cover a rectangle shaped floor measuring 16 feet by 12 feet

    asked on April 14, 2011
  23. Math

    pls. verify: 4x^3y^-2 / 2x^-1y^4 = 2x^4y^-6 [w^1 / w^-3]^-4 = 1/w^16

    asked on November 23, 2010
  24. math

    Hi - please help me with this one: (5b^2c^1/4)^3 is the answer: 125b^6 3c ^ 3/4

    asked on November 20, 2010
  25. Math

    Not clear about this, please help me understand the steps: (5b^2c^1/4)^3

    asked on November 20, 2010
  26. Chemistry

    Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe

    asked on October 15, 2010
  27. Chemistry

    Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe

    asked on October 15, 2010
  28. Biology

    1) Why is it appropriate to call the endomembrane system a "system?" 2) The selective permeability of biological membranes is dependent on _______________. 3) Why is it unusual for a phosphlipid molecule to flip from one face of the membrane to the other?

    asked on January 9, 2010
  29. Chemistry

    Dimethylsulfoxide (C2H6SO), also known as DMSO. How many moles of carbon are in 4 moles of DMSO? a 1 b 2 c 4 d 8 e not enough info

    asked on November 1, 2009
  30. Chemistry

    How many molecules of carbon dioxide (CO2) are there in 88g of carbon dioxide? a. 1 b. 2 c. 88 d. 1.2 x 10 24 e. not enough info

    asked on November 1, 2009
  31. Geography (Urgent)...

    I need to know 3 reasons why my Ecological Footprint is smaller than the world average Footprint (3.4 vs. 2.2) I am unsure as to how mine alone is larger than the whole world's. THANKS -Dex

    asked on November 17, 2008
  1. Art

    c d e a c

    posted on October 19, 2018
  2. Art

    yall lame im right

    posted on October 19, 2018
  3. Physics

    334cc

    posted on July 11, 2018
  4. Language Arts, can anyone check?

    For Connexus, the answers are A B A D

    posted on May 12, 2017
  5. science one question

    1. B 2. C 3. C 4. C Believe me, I just took the test. Hope this helps!

    posted on March 1, 2017
  6. Physical science

    150 N

    posted on February 25, 2017
  7. science

    Cutie is 100% correct, believe them!

    posted on February 22, 2017
  8. Language Arts

    Eric Mashak is 100% correct, believe them.

    posted on February 22, 2017
  9. Global Studies

    The answers are 100% correct, it is D, D, C, D.

    posted on January 30, 2017
  10. Language Arts - Please Help!

    Thank you so much Hallee! Those answers are 100% right!

    posted on January 30, 2017
  11. L.A.

    The Helper is correct.

    posted on January 15, 2017
  12. Language

    I laughed so hard at @nuh uh! I don't know why.

    posted on January 12, 2017
  13. Chemistry

    this does not help . . . . can any one else help me please

    posted on October 19, 2014
  14. Art Please check answers

    These are all right i got 20/20

    posted on February 16, 2013
  15. algebra

    Omelette du Fromage?

    posted on October 11, 2011
  16. Chemistry

    Please disregard my 2 comments after. I finally had my Eureka moment and figured this all out. Thanks to your help and researching a bit more I feel I understand this now. Your efforts in helping me were not wasted lol. Thanks again!

    posted on June 21, 2011
  17. Chemistry

    Sorry didn't see...thank you!

    posted on June 18, 2011
  18. Math

    Hi, no it wasn't. I think the assessment website is buggy because it didn't feel right. I have to contact the college and inquire. Thanks anyways as your answer made me see that there is a problem with site.

    posted on June 17, 2011
  19. Chemistry

    Hi again - was just comparing part c with your notes and I have an extra Oxygen on left side that right side doesn't have?? Perhaps your mistaken and oxygen is reduced?

    posted on June 17, 2011
  20. Chemistry

    Hi yes sorry the arrows didn't work out when I copied the question. For the following in your answer 2SO2 + O2 ==> 2SO3 And that is a REDOX equation. S changes from +4 to +6; oxygen changes from zero (the O2 is zero while the O in SO2 is unchanged) to -2

    posted on June 17, 2011
  21. Math

    Thank you...

    posted on June 16, 2011
  22. Chemistry

    Having it explained that way makes it easier to understand and helps to verify answer in the end which my course didn't explain. Thank you.

    posted on June 14, 2011
  23. Chemistry

    Yes that's right, free states have oxidation number of zero. Ok will work out reduction and oxidation, made it a bit clearer. Thanks for your help, very valuable :)

    posted on June 14, 2011
  24. Chemistry

    That's what I thought....Thank you !!!

    posted on June 5, 2011
  25. math

    Thank you Sir.

    posted on November 20, 2010
  26. Math

    Thank you! Is that 9 cm or just 9 ?

    posted on November 20, 2010
  27. advanced math

    Omelette du fromage!

    posted on October 24, 2010
  28. Chemistry

    I got lost in all the material I'm learning which is why I posted here. Thank you for helping me sort all this out. I was looking at the problem all wrong thinking that the NaOH was a liquid. Very new to chemistry...slowly but surely getting it, thanks for

    posted on October 15, 2010
  29. chemistry

    amazing help - this is what I got too however they also want me to explain the steps I would take to prepare this solution. I'm using a graduated cylinder to measure the sodium hydroxide and need to convert the 5 grams to ml. I'm not sure the steps to

    posted on October 15, 2010
  30. math

    ok i get it , thanks

    posted on April 11, 2010
  31. math

    im not sure how to complete the problem becuase my answer was 9312.82, not sure if this is correct

    posted on April 11, 2010
  32. Geography (Urgent)...

    I did calculate my footprint. It is larger than the world (mine is 3.4 vs. 2.2) I am wondering why this is. -Dex

    posted on November 17, 2008
  33. science

    im doing this project too its a levelled assessed task and i needed help is that cheating?!!

    posted on March 25, 2008