Monday
September 15, 2014

Search: Chemistry (3rd time I've posted this)

Number of results: 70,183

DEsperate to undertsand-Chemistry
The pressure of gas is measured at 550 mm Hg. Calculate the pressure in a. Torr b. lb/in2 c. atm d. in Hg How do I set up these conversions to get the [prper calcu;ations...step by step? This is the 3rd time zzzzzzzIve posted this question and I need to know how to get the ...
May 4, 2012 by KL

chemistry
The activation energy, Ea, for a zeroth-order reaction, X-->products, is most readily obtained from the slope of a plot of: (choose from below) -[X] vs time -ln k vs time -rate vs time -[X]^2 vs time -ln[X] vs time -1/[X] vs time -ln k vs 1/T, where T is temperature in -ln ...
June 18, 2014 by Jin

SS7R - Bill of Rights Project
3rd Amendment In the 3rd Amendment homeowners don’t have to put of soldiers in their homes. No soldier shall, in time of peace be quartered neither in any house, without the consent of the owner, nor in time of war, but in a manner to be prescribed by law. is there anything ...
April 10, 2012 by Laruen

MATH, 3rd time i posted this
can someone please help me, i posted this like 3 times. i need help on a couple of questions. I did all my other questions but i need a lot of help with the word problems... 1. The side length of a small square is s. A larger square has a perimeter of 124.8 cm. Its sides are 3...
March 26, 2013 by Olly

Attn: Staci
I posted a response. At this time it is on page 2 but will progress further from page 1 as more new questions are posted.
March 4, 2010 by DrBob222

algebra
if a+b=1 and a squared + b squared=2 what does a to the 3rd + b to the 3rd equal? If b is 1, b cubed is one. That would work for the first half, but doesn't extend to a to the 3rd+b to the 3rd and what weould 2 squard be? Thank you so much for helping Are you saying: if a+b=1 ...
May 13, 2007 by janice

Chemistry
I am working on a problem that was posted January 20. Can someone help? I posted an answer to the problem requesting help.
October 14, 2008 by amy

Algebra II
The problem is 5x to the 3rd times (7x)squared. I multiplied (7x)(7x) first and got x squared + 14x + 49. Then I multiplied each of those by 5x to the 3rd and came up with an answer of: 5x to the 5th + 70x to the 4th + 245x to the 3rd. Did I get this one correct??
February 3, 2008 by Lucy

To Chemistry question/Sonny
I posted a response to your question from Thursday about Mn/Ce at the original post. At the time of this posting that was on page 3.
October 17, 2008 by DrBob222

Science
A CHILD IS BORN ON EARTH IN 2000. yOU ARE 94.6 TRILLION KILOMETERS AWAY FROM EARTH AND YOU SEE THE CHILD'S 3RD BIRTHDAY. HOW OLD IS THE CHILD AT THE TIME OF THE CHILD'S 3RD BIRTHDAY?
February 7, 2008 by Chelsee

chemistry
i know the answer is carbon, but i dont see what you mean, and on my homework i have to describe why its the right answer, thanks for your help by the way Use the links I posted for you the first time you asked
December 17, 2006 by confused

calc
Please help me you guys, this is the 3rd time I have posted this question. Is anybody going to help me with this problem? A widget factory has fixed costs of 35 billion dollars and variable costs of 781 million dollars per widget. The revenue (in $ billions) from selling x ...
February 20, 2007 by Lia

math 115
- (-4)3rd power + (-3)2nd power - .5 3rd power is 72.875 correct? The 4 is negative because its to the 3rd power, but the negative before it makes it positive, am I right? thanks
November 3, 2009 by Carina

Grammar Advisor
I just cannot figure out if these answers are correct or not. Can you please help me? 78. If the sound system hadn’t failed, last night’s show would have been better. This is a correct sentence using the 1st conditional form. x This is a correct sentence using the 2nd ...
September 25, 2013 by William

Chemistry
I've posted this question now three times and no one has responded. I first posted it Sunday 2/11 at 1 pm. Meanwhile, other questions are being answered. Can someone please help... Al^3+ forms a complex ALSO4+ in the presence of sulfate... Al^3+ + SO4^2- = AlSO4+ with Kstab...
February 12, 2007 by Mary

Jiskha
I typed several questions and answers regarding the subject of Geography, and suddenly, as I was waiting for a reply from Ms. Sue, it seemed as though my questions were deleted from the webpage where all of the other questions are posted. I do not know where I may be able to ...
October 6, 2013 by Anonymous

3rd grade
my need help with 3rd grde social studies
September 29, 2009 by T

3rd grade
Do 3rd graders learn algabra
September 22, 2010 by Anonymous

conditional sentence
1. If the sound system hadn't failed, last night's show would have been better. a. this is a correct sentence using the 2nd conditional form b. this is a sentence using the 3rd conditional form Answer a. 3. if the club's manager agrees, they'll play a few more original songs ...
June 12, 2013 by Jim Collum

3rd grade
how do I write the time in three different ways for 3:50
December 2, 2008 by Ross

to Nazgul
You have posted the same thing, time after time this morning, and you've received the same response from several people here: You need to post what YOU THINK the answers are, and then someone will be able to help you.
March 8, 2011 by Writeacher

Chemistry
CORRECTION: (sorry!) What major product will be obtained if the following alcohol is dehydrated: CH3 | CH3CH2CCH3 | OH (the CH3 is connected to the 3rd Carbon from the left and the OH is attached to the same Carbon) I tried to do it and this is what I got: CH3 | CH3CH=CCH3 Is ...
February 22, 2010 by Holly

Intro to Probability, please check my work.
A fair coin is flipped three times. You win $5 every time the outcome is heads. Let the random variable X represent the total number of dollars you win. (a) List the sample space. (b) Determine the probability function of X. ====================== Answer: a) 2^3= 8 ...
February 17, 2008 by Amelie

social studies for the 3rd time
I need something that s related to California that starts with a Q
June 11, 2008 by Andrew

Japanese
On thursday I posted a question. I had done most of the work I just didn't put those things in my book. I have figured out some of those that I posted on Thursday and I have done everything else but can someone tell me what these answers are in Japanese(romaji) 1. I go to ...
April 15, 2011 by Caity

3rd math
a clock starts at 5:05. what time is it after the minute hand rotates 12 degrees
March 13, 2013 by nicole

3rd Grade Math
There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class? How can I explain this to my 8yr old in 3rd grade? I've got myself so confused in the process of trying to figure it out ...
October 2, 2012 by Lisa

math
3 lights started at the same time..1st blinks at 5 seconds, 2nd at 6 seconds and 3rd at 4 seconds...how often will they blink at the same time
September 16, 2009 by stacey

3rd grade math
Writing in math, how would a 3rd grader explain how to use multiplication to convert yards to feet?
December 10, 2009 by Julie

help help helppppp pleasee
ý posted some question of physics... please any one answer me.... qyestions are bellow ý posted before 3 hours...
March 1, 2012 by ADRÝAANA

Dr Bob222 !!!! Chemistry
Cyclohexane is composed of 85.6 % C and 14.4% H. when it is mixed in the proper ratio with oxygen, it can be used as an anesthetic. At 755 mmHg, and 25 degrees Celcius, it has a density of 2.05 g/L. what is the molar mass of cyclohexane and its molecular formula? The way i ...
October 15, 2006 by Anonymous

3rd grade
Teaching 3rd graders compatable number? Is there a rule? I have taught them to group numbers that add up to ten. I also told them think of it as rounding to nearest 5. Am I steering them in the right direction?
September 22, 2010 by Teach3rdgraders

Algebra
|a+2 3z+1 5m| |4k 0 3| + |3a 2z 5m| |2k 5 6| = |10 -14 80| |10 5 9| I think I posted right this time I need the values of the variables in each equations.
December 17, 2009 by mike

To Aly
You have posted the identical post several times, but obviously did not take the time to read the responses you have received. Please scroll down and find your earlier posts -- and read the responses. Your posts are blocked for the time being, to give you plenty of time to ...
November 14, 2010 by Writeacher

English
How would a 3rd grader classify this sentence using s, scs and scv? And where can I learn how to teach this better to my 3rd grader. Read your library book quietly at your desk. Thanks
December 30, 2010 by Nicole

3rd grade
3rd grade Explain how to add with carrying give example
November 4, 2009 by Jesse James

Socials 1 question
I posted this before...I am doing a brochure on the Inuit. I need a catchy phrase on the cover about the Inuit, can you please help me think of one. the brochure is suppossed to be brought from a time machine, saying I went back in time. Any suggestions considering this... thanks
April 17, 2013 by Olly

physic
A car traveling at 80km/hr decelerates at 1.5m/s^2. Calculate a) the time it takes to stop. b) The distance travelled in the 3rd second.
May 16, 2013 by Anonymous

3rd grade student teacher needs your help plzzzzzz
I am creating a unit on public transportation in New York, but i am having a difficult time designing lessons to teach 3rd graders about public transportation. I was planning on giving the a word search, allowing them to explore various websites, and to interview a grandparent...
September 28, 2008 by Trisha

To whoever "Anonymous" is
You posted this: Posted by Anonymous on Thursday, July 25, 2013 at 10:16am. Provide a brief overview of government policy toward Native American’s during the period of 1850 to 1900 and the impact this policy had on their lives. You posted your entire assignment without asking ...
July 25, 2013 by Writeacher

Written Analysis
I am in need of some help with my 4-6 paragraph summaries on discrimination. I posted yesterday but couldn't get the paper going with the ideas posted. Not to offend my helper/teacher/instructor. Keri
November 12, 2011 by Keri Ann

math
chopsticks ain't nothing wrong with me and i am a woman my computer was messing up at the time and i did not know if the message was posted or not
February 4, 2009 by DAVISHA

Advice...about chemistry degree Dr.Bob
Based on the question topic posted by Britney below titled:In your opinion (your answer to this reminded me of something) (I posted the same thing there but I thought it was improper to piggyback on that post so I posted this under a new topic) I don't know where to start but ...
March 25, 2008 by ~christina~

NARAYANA JUNIOR COLLEGE .PHYSICS
2 PARTICLES [FREE TO MOVE] WITH CHARGES +q and +4q are a distance L APART. A 3RD CHARGE IS PLACED SO THAT THE ENTIRE SYSTEM IS IN EQ2UILIBRIUM.FIND THE LOCATION,MAGNITUDE AND SIGN OF THE 3RD CHARGE
March 31, 2012 by B.Y.SARAT

chemistry
what is 124.5 when rounding to the 3rd significant figure?
September 15, 2011 by cheyenne

Chemistry-Bob please help
Posted by anne on Friday, October 14, 2011 at 6:30pm. Hi, I have a question on HPLC (high performance liquid chromatography). The procedure says to use a 4.6 x 150mm x 3um column. The relative retention time of Impurity B with reference to the main peak is about 0.5 (i.e the ...
October 14, 2011 by anne

math
the bus route also passes through balmorhea which is 1 3rd of the way from el paso to san antoio. about how long does it take the bus to get to balmorhea You told us the distance from El Paso to San Anotonio is 560mi, so the distance to Balmorhea = 560/3. Using distance = rate...
October 2, 2006 by chemiii

Chemistry-please help
Posted by anne on Friday, October 14, 2011 at 6:30pm. Hi, I have a question on HPLC (high performance liquid chromatography). The procedure says to use a 4.6 x 150mm x 3um column. The relative retention time of Impurity B with reference to the main peak is about 0.5min. If I ...
October 14, 2011 by anne

Chemistry
Can someone check my answers for me thank you. This is my 3rd time posting this one up...maybe its just not going through bc I don't see it on the current ?s. 4NH3 + 7O2 --> 4NO2 + 6H2O 1)How many grams of oxygen are necessary to produce 4.50 moles of NO2? answer: 252 grams...
January 9, 2008 by Mike

Chem- Dr. Bob!
Posted by Rachel on Thursday, January 20, 2011 at 3:57pm. Does anyone know where I can get an image of the valence bond model for maleic acid? ie. showing the pi and sigma bonds and indicating the hybridization (sp2, sp3.. ) OR could someone describe these things to me? I'm ...
January 22, 2011 by Rachel

statistics
A researcher is investigating whether, on average, 3rd grade males have significantly different creativity scores than 3rd grade females. She samples students from a large school district where she works. What is the independent variable?
October 31, 2011 by Anonymous

Math PLEASE HELP
No one was answering my questions for the first question I posted so I posted it again. answers for 12345: 1. 9 3/5 2. 4 1/2 3. 4 3/4 4. still 7 6/9 5. still 10 16/18
December 1, 2010 by Pratigya

Math.G.P
The 1st term of a G.P is equal to x-2,the 3rd term is x+6 and the arithmetic mean of the 1st and 3rd terms stands in the ratio to the 2nd 5:3.find the value of x.
February 14, 2014 by Miracle

Newton's 3rd Law
How can I use Newton's 3rd law on a diver off of a diving board? Could I calculate friction against his feet?
March 22, 2011 by Joe

English
How does the action that a 3rd person omniscient presents contrast to an action narrated by a 3rd person objective? I can't seem to see the difference.
December 20, 2011 by Amy

math 3rd grade
How can you use 4x7 to find 8x7? find the product. I dont understand this how can i expect my 3rd grader to understand.
November 26, 2012 by Sarah

English
I'm a 7 Letter Words, You Read me daily, My 5, 6, 7th Letter increases every Year. 3rd and 4th Letter are the Same. My 3rd, 2nd and 5th Letter Covers 75% of the World. What am i?.
October 6, 2012 by Tesa

physics
Posted by michelle quendarsv on Saturday, November 20, 2010 at 5:26pm. Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please...
November 20, 2010 by michelle quendarsv

3rd grade
how can i combine this sentence to make one sentence? Do you have the time? Do you wear a watch?
September 12, 2010 by clarissa

help
If the 3rd Monday of the month follows the 2nd Sunday of the month, then the date of the 3rd Monday is the _____th. a) 14 b) 15 C) 16 d) 17 e) 18 Please explain???
February 24, 2014 by nisrin

to Math Mate
I posted a response down below to Math Mates comment I posted this because I was afraied nobody would see it...my physics lab thanks oncce again
June 1, 2009 by to Math Mate

Math HELP!
I posted a few questions and then went back and posted how I thought they were supposed to be answered. Could someone please locate my earlier questions and tell me if I am on the right track?
September 24, 2010 by Sabrina

English
Posted by rfvv on Monday, August 25, 2014 at 4:45am. 1. It's been a long time. 2. It's been a while. 3. I haven't seen you for a while. 4. Long time no see. --------------- Are they all the same in meaning? Does 'a while' mean ' a long time' or 'a short time'? English - ...
August 25, 2014 by rfvv

Math/Standard and scientific notation
Express each measure in standard form. (One more thing by the way you need this few prefixes) Tera= 10 to the 12th power Giga= 10 to the 9th power Mega= 10 to the 6th power Kilo= 10 to the 3rd power Pico= 10 to the -12th power Nano= 10 to the -9th power Micro= 10 to the -6th ...
February 25, 2009 by Sandy

To Fay1985 - math
Your post was removed. Please tell us your thinking on the 25 questions you posted. Attempt some answers, and we'll be glad to help you. Also -- I don't believe that you posted complete information for many of the questions.
January 17, 2009 by Ms. Sue

AP chem
is there anyway that i could also get help with the chemistry problem that eric posted?
January 23, 2008 by Lin

Algebra
Mutiplying a Binomial by a Trinomial (FOIL) First, Outer, Inner, Last Method (3X+2)(X-1)(X+3) I have tried equation several times. The book says the answer is: 3X 3rd + 8X 2nd - 5X -6 I get: 12X 2nd - 6X + 3X 3rd -4 Not sure if i am doing it wrong or if error in the book.
April 22, 2008 by G

math
You offer to do the dishes for your family for the next month.This month has only 31 days. You suggest that they can pay you in one of three ways: A. $0.50 each day.(I already did this;=$15.50 a month. B.$0.10 the first day,$0.20 the second day,$0.30 the third day,and so on. C...
December 17, 2012 by Serpentlord123

math,drbob222
I'm sorry the problems i posted had a couple of errors how i posted it here they are: Posted by DrBob222 on Friday, November 24, 2006 at 6:19pm in response to Math. Thanks for showing your work. It helps us to know where you are having trouble. #4. [25/ (2^3-3)]*2 the star two...
November 25, 2006 by Jasmine20

Chemistry
In calcium, the electron configuration is 2-8-8-2. Why does the 3rd level have more energy than the 2nd if they're both 8?
November 13, 2010 by danny123

math
6 runners run in a 500 yard dash. Prizes are awarded for 1st, 2nd, and 3rd place. Assume there are no ties, how many different orders can the runners finish 1st, 2nd, and 3rd?
August 19, 2013 by peter

Chemistry
DrBob222 please help me answer the question that I posted pleaseee, pleaseeee
February 16, 2010 by Jennifer

Plz urgent
Can anyone please answer my chemistry question i posted quick?
February 23, 2013 by Mia

Math: Factoring
I'm having a hard time factoring polynomials, especially 3rd degree. -x^3+2x^2+4x-8 -x^3-5x^2+20x+12 I don't know how to begin. I thought long division, but what would I divide by?
December 2, 2007 by Amelie

Math challenge
There are 3 circles divided into thirds with a number in each third. The 1st cirlcle has 18, 23 & 49. 2nd cirlce has 25, 62, 38. The 3rd cirlce has ?, 17 & 39. We need to figure out what number is missing from the 3rd circle, and how you figured it out.
December 6, 2012 by Gabby

To Amanda
I deleted same lengthy assignment that you've posted three times in the last hour or so. "Posted by Amanda on Thursday, November 11, 2010 at 5:40pm. Continuing Cookie Chronicle (Note: This is a continuation of the Cookie Chronicle from Chapters 1 through 12.)" I don't know why...
November 11, 2010 by Ms. Sue

Precalculus
I know I posted this question already ,but I posted the wrong one.... Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' INTERSECT C {?} I meant INTERSECT not union! My answer: 4,8,12
April 27, 2014 by Anonymous

3rd grade math
in a survey, 8 out 10 students said they would like more time for recess. out of 100 teachers, 78 said they would not like to add more time for recess. write these figures as decimals and compare them
January 29, 2013 by mythreyee

Algebra II
The problem states: Saturn is approximately 1.4x 10 to the 9th power kilometers from the Sun. If light travels at approx. 3.0 x 10 to the 5th power kilometers per second, how long does it take light from the Sun to reach Saturn? Express your answer in scientific notation. The ...
February 3, 2008 by Lucy

Chemistry
I posted a question at 5:43pm yesterday...can anyone please help with at least some of it? Thank you so much.
November 26, 2010 by Stephanie

conditional sentence
1. If the sound system hadn't failed,last night's show would have been better a. this is a correct sentence using the 1st conditional form b. this is correct sentence using the 2nd conditional form C. this is a correct sentence using the 3rd conditional form answer A 2. They'...
June 12, 2013 by Jim Collum

physics
A curving freeway exit has a radius of 50.5m m and a posted speed limit of 35 mi/h \rm mi/h. What is the radical acceleration (in m/s^2) if you take the exit as posted speed express answer to two significant figures and appropriate units. Thanks for any help.
September 21, 2013 by deb

math 140
I have two questions posted that has not been answered please help. The questions were posted on March 18 please help.
March 19, 2013 by betsy

Chemistry
How do I calculate the wavelength of the emission line when electrons drop from the 4th to the 3rd energy level in the hydrogen atom?
February 9, 2011 by Lis

fast answer plss
the sum of four angles about a point is 360degree.the measure of the 2nd angle is 6degreemore than 3times the 1st,the measure of the 3rd is 3degree more than twice the first,the measure of the 4th is 20 degree less than the 3rd.what is the measure of each angle?
October 11, 2013 by math algebra

chemistry
Choose the correct variables that will create a linear plot for each reaction order. Reaction Order / Answer Zero/ a??? First /b??? Second /c??? a. [A] vs time b. ln [A] vs time c. l [A] vs time d. log [A] vs time e. [A] vs (time)^2
May 16, 2008 by Amy

physics
A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 90.0°. (a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through what angle during the ...
March 24, 2012 by Adam

chemistry
8.09% carbon, 0.34% hydrogen, 10.78% oxygen, and 80.78% bromine its similar to the last one i posted empirical formulas
February 23, 2013 by tula

CAN ANYONE HELP?
I posted my science (chemistry) question and I have received no help and i really need to get this done so can someone please help??
April 3, 2014 by Anonymous

calorimetry
please, someone answer my question i posted already I answered your question within 15 minutes. It is posted. Hit the refresh button of your computer. sorry that my question took youthat long, but it was of great help. glad to help. Thanks for using Jiskha.
January 18, 2007 by claudia

Algebra
I am having trouble with finding the 1st and 3rd quartiles of a set of data. For example, let's say the data is: 4, 9, 11, 16, and 24<- these are cumulative frequencies. The median (or 2nd percentile)is 11, right? My teacher says it's 12. Then for 3rd quartile I got 20, but...
April 3, 2008 by Anonymous

Intermediate Algebra
add or subtract the following polynomials as indicated (5.9x to the 3rd power+3.4x to the 2nd power - 7)-92.9x to the 3rd power -9.6x to the 2nd power +3)
September 7, 2013 by Kimberly

Chem
A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container
April 21, 2013 by Ray

9th Chemistry
Why is there a big space in the periodic table between the 2nd & 3rd periods? The activity of the electrons is related somehow.
November 8, 2009 by Marie

Chemistry
3NO2 + H2O = 2HNO3 + NO How many grams of nitrogen dioxide are required to produce 5.89 x 10 to the 3rd power kg HNO3 in excess water?
December 1, 2011 by Katelyn

childcare
Ms. Sue I observe that you are answering questions at this time. Would you be kind enough to look over my questions posted today. August 19,2010 at 12:07 p.m. Thanks
August 19, 2010 by action

Physics
A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 90.0°. (a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through what angle during the ...
March 25, 2012 by Adam

calculus
hi I posted this question earlier: what is the median waiting time for f(x)=((1/8)e^(-x/8))? I said the answer was 5.55 is this correct? thank you! and somebody helped me find the mean, but i was wondering if this was the right median. thanks
April 8, 2008 by tia

world issuse
I'm a 7 letter word u read daily,my 5th 6th and 7th letter increase each year,my 3rd n 4th letter are the same,my 3rd 2nd n 5th letter cover 75% of the world.
May 24, 2011 by dan

arithmetic
An arithmetic n geometric sequence have the same first term 2.with the 2nd term x. the sum of the 3rd term of the AS is equal to the 3rd term of the GS. Give the first 3 terms of both sequences.
February 26, 2012 by simphiwe

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