# Chemistry (3rd time I've posted this)

90,787 results

### 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 ...

### 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 ...

### SS7R - Bill of Rights Project

3rd Amendment In the 3rd Amendment homeowners donâ€™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 ...

### 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...

### 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.

### 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 ...

### Chemistry

I am working on a problem that was posted January 20. Can someone help? I posted an answer to the problem requesting help.

### 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??

### 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.

### 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?

### chemistry

i know the answer is carbon, but i don't 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

### social studies for the 3rd time

I need something that s related to California that starts with a Q

### CHEMISTRY

THIS IS THE 3RD TIME POSTING THIS. PLEASE HELP ME ANSWER THIS. THE HOMEWORK IS DUE TONIGHT. Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. THE -3, -4, -4 ARE THE CHARGES, CANT TYPE SUBSCRIPT ON...

### English

1. She uploaded the pictures on her school website. 2. She uploaded the pictures to her school website. (Which preposition do we have to use, 'on' or 'to'? Are both okay?) 3. Some students posted a lot of unkind comments, making fun of my pose. 4. Some students posted a lot of...

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 ...

### 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 ...

ý posted some question of physics... please any one answer me.... qyestions are bellow ý posted before 3 hours...

### 3rd math

a clock starts at 5:05. what time is it after the minute hand rotates 12 degrees

### math coordinate geometry

Find the 3rd vertex of a triangle ABC.If 2vertices are A(-4,3),B(4,3)and its centroid is at orFind. Find 3rd.

### 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

Writing in math, how would a 3rd grader explain how to use multiplication to convert yards to feet?

### 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 ...

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?

### 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.

### 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

### 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 ...

### 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

### 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 ...

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...

### 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

### 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.

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 ...

### Physics (deriving Keplers 3rd law)

How do I derive a straightforward form of Kepler's 3rd Law if I start with Newtons's Law of Gravitation. (the opposite of what Newton did)

### chemistry

what is 124.5 when rounding to the 3rd significant figure?

### 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

### 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

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 ...

### 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 ...

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 ...

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

### 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...

### 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?

### 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...

### 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.

### 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?

### 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.

### 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?.

How can you use 4x7 to find 8x7? find the product. I don't understand this how can i expect my 3rd grader to understand.

### 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 3rd graders will be ...

### 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

### 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?

### 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???

### 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...

### 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.

how can i combine this sentence to make one sentence? Do you have the time? Do you wear a watch?

### 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 ...

### M@them@tcs

on @ Gp.the 4th term exceed 3rd term by 72 nd 3rd term exceeds 2nd term by 24.fnd the frst four term of the progressn.

### 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 - ...

### AP chem

is there anyway that i could also get help with the chemistry problem that eric posted?

### 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...

### 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.

### 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?

### 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...

### Algebra

(-11x to the 5th power +4x + 8x to the 3rd power)+(-13x-2+7x to the 3rd power)

### Algebra

(-11x to the 5th power +4x + 8x to the 3rd power)+(-13x-2+7x to the 3rd power)

### Physics

The following conversion equivalents are given 1m=100th 1in=2,5th 1ft=12th A bin has a volume of 1.5 to the 3rd power. The volume of the bin, in ft to the 3rd power, is closet to

### 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?

### 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...

### 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

### Algebra

A girl was murdered and there was 4 people in the room 1.Sohag 2.Jahan 3.Sagor 4.Hamidur Police got a paper from the hand of the girl and it was written that 1st September 2nd January 3rd August 2nd November 3rd April Who is the murderer among the 4 suspicious?

### Math

Good evening, I posted this question this morning. The answer that someone posted was not clear. Could someone please help me with this problem? x:9=2/3:36 The answer is 0.1666 But this is what I keep getting: x/9 = (2/3)/36 x * 36/36= (2/3) * (9/1) /36 (2/3) * (9/1) /36 = 6 6...

### 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.

### Chemistry

I posted a question at 5:43pm yesterday...can anyone please help with at least some of it? Thank you so much.

### 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?

### 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 ...

### 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.

### 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?