Thursday
July 24, 2014

Posts by dexter


Total # Posts: 45

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?

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

Art Please check answers
These are all right i got 20/20

Art Please check answers
These are all right i got 20/20

english literature
witty characteristics of Touchstone in as you like it

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

Chemistry
Sorry didn't see...thank you!

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) �� Zn+2(aq) + Pb...

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) �� Zn+2(aq) + Pb...

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!

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?

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 in SO3. Why is ...

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 reacton b. 3NO2(g) + H2O(l...

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- (zinc is oxidized)...

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.

Math
Thank you...

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?

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 :)

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. 3Ag2S(s) + 2Al(s) -...

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.

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!

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

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 the hydrochloric ...

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

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

math
Thank you Sir.

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

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

Math
Thank you! Is that 9 cm or just 9 ?

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 how you would pr...

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 your help, it ma...

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 how you would pr...

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 take. Do I use th...

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.

advanced math
Omelette du fromage!

algebra
Omelette du Fromage?

math
ok i get it , thanks

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

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.

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? 4) What do ...

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

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

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

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

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

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