March 26, 2017

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Number of results: 20,237

homework college chem.
a sample of gas occupies a volume at 73. 1 mL. As it expands, it does 135.0 J of work on its surroundings at a constant pressure of 783 torr. what is the final volume of gas?
February 26, 2012 by danielle

Do your homework before applying for any job. if you rewrote the sentence beginning with (Be sure that you) the next words would be? 1)got done your homework 2)got your homework done 3)had done your homework 4)did your homework 5)have done your homework
May 10, 2010 by Anonymous

writing skills
Do your homework before applying for any job. If you rewrote sentence 5 beginning with Be sure that you the next words should be 1 got done your homework 2 got your homework done 3 had done your homework 4 did your homework 5 have done your homework answer 5
June 28, 2016 by piper

To Jen: College
I've removed your post because a) it contained a reference to which we have no access b) it gave no idea of your ideas or work on this assignment Note: We had no connection with any college, and we don't do homework assignments.
April 19, 2009 by Ms. Sue

To Rashida Agee -- Sci275
Your post has been removed because it refers to materials that the Jiskha volunteers cannot access. Please note that we do not do homework. The Jiskha Homework Forum has no connection with any school or college.
May 10, 2009 by Ms. Sue

To Laura: Research Writing
I've removed your post for two reasons. 1. You've referred to unknown materials. 2. You've given us no indication of your thinking on this complex assignment. Please note that the Jiskha Homework Forum does not do homework, nor are we connected with any school or college.
May 3, 2009 by Ms. Sue

how about this for starters? The shift from being a high school student to a college student can be both pleasurable and discomforting at the same time for the simple fact that college is nothing like high school. In college there are no “boundaries”, telling the students ...
January 25, 2010 by layla

Homework helpline?
Is there a homework helpline for college level I can call and ask homework questions through the phone? I know there is one that is available for elementary school and middle school, and it would seem a little ludicrous for one to be available for this level, but are there any...
April 28, 2014 by Dana

College Accounting
Re: Homework Text: College Accounting, 19th Edition Page 227-229 Can you provide me with the trail blances for May: Comprehensive Problem 2 - The General's Favoriate Fishng Hole. I am really having a problem with this assignment and I would greatly appreciate your help. Thank ...
March 19, 2009 by Diana

college physics
cost of homework help for college physics
September 27, 2011 by mae

Homework (in general)--help!
I was an A/B student a few years ago, and now there's a problem. I'm a 6th grader whose "homework forgetting level" is increasing. For some reason, I often leave some of my homework home. Can you help me so I will then rarely forget my homework?
November 7, 2008 by frantic

Will you please help me with my week 5 Axia College homework?
December 19, 2009 by Kenya

College CHEM
Name for Sn(BrO3)
September 12, 2011 by Bill

college chem
a compound containing
October 7, 2013 by Erika

Help :) I got this Chem homework to research on the Taxonomy of Living Things and on the species to kingdom. Anyone can help where I can find this? :) Thank you
August 13, 2011 by Jess

80% of students passed a class. 90% of those 80% did homework. Of the 20% that didn't pass, 60% of them did the homework. What is the probability of a student having done the homework?
October 29, 2011 by Danyell

lila did 2 and 3/4 hours of homework on saturday and 3/4 of homework os sunday.what is the time she spent on homework over the weeekend
February 21, 2013 by Ja'mes

College Algebra
The question says on my homework: Find the slope and y-intercept of the line 2y+5x-6=0. How do you do it?
December 1, 2008 by Jon

Identify the correctly punctuated sentence. I marked the one I think it is. • Doing my homework, making my bed, and practicing guitar are on my to-do list for the day. • Doing my homework, is the first thing I should do. • Doing my homework I found my mind start to drift...
May 15, 2014 by Sandra

A survey carried out on 40 students about when they did their homework over the weekend F=(homework done on friday) S=(homework done on saturday/Sunday ) n(f)=20,n(s)=29 How many did both days ?
November 9, 2014 by Amber

College Chem
How many molecules of CH3OH will contain 3.20 x 10^23 H atoms?
July 16, 2012 by Mark

college chem
Calculate the molarity of the solution: 42.6 g NaCl in 1.58 L
July 19, 2015 by tonia

To DrBob222(Please check Chem)
(This homework question has been removed due to a copyright claim submitted by K12 Inc.)
June 21, 2012 by Liz

How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this Chem homework and it's getting me frustrated, please help!
September 26, 2014 by Luis

College Algebra
Let Z be equal to (2-5i) The question is z^2 +iz -(5+i) The answer I got for this was -22 + 18i but it isn't correct on my homework page please help/
May 28, 2014 by Anonymous

college chem
calculate the density of O2 gas( in g/L) at 1.22 atm and 25 degrees C
November 11, 2009 by amanda

College Chem
Is the percentage of sodium in pure table salt 39.34%?
March 19, 2010 by London

college chem
PLEASE..Determine [OH-]of a solution that is 0.270 M in HCO3-...thanks
April 9, 2010 by susy

college - chem
how do i find the amount of moles of H2O in a hydrate?
September 14, 2010 by Patti

Nuc. Chem
HELP!!! I have like 20 of these kinds of questions on my homework and no clue how to solve them. Electron capture transforms 40 K 19 into what nuclide?!?! Thank you
March 4, 2008 by Jonathan

Theres this one question in my homework that says that there is an unusual but actual condensed configuration and they said to write it. Which element are they referring to? :S
July 7, 2009 by Lena

chem homework help
can you check my work? Give the conjugate acid for each of the following bases. A. CN- = HCN B. SeO4^2- = HSeO4- C. HCO3- = H2CO
April 25, 2010 by Anna

1. I do math, science, and English homework every day. 2. I do much / a lot of homework every day. 3. I do much homework every day such as math homework, science homework, English homework, Chinese characters homework, etc. (Are they all grammatical?)
September 2, 2010 by rfvv

College Chem II
Determine the [H3O+] of a 0.160M solution of benzoic acid.
March 7, 2010 by Katie

college kinetics chem
what is the rate law for 2OF2 yeilds O2 + 2F2
October 9, 2010 by Anonymous

College Chem
How many moles of O atoms are there in a sample of 86g sucrose (C12H22O11)?
January 30, 2011 by Nae

College Chem
Calculate the total number of electrons that can be present in the principal level for which n = 4.
April 15, 2009 by Justyna

College Chem
With a relative standard deviation of 32.51+_ 0.15. Cant the result of 32.14 and 32.75 be discarded because they are out of the .15 range?
March 19, 2010 by London

College Chem
How much heat (in kJ) is absorbed when 10.0mL of liquid ethanol vaporizes?
September 27, 2010 by Logan

college chem
Calculate the Mole Fraction of benzene in toluene if there are 5 grams of each in the mixture
February 10, 2011 by shelby

college chem
125g MgSO4 • 7 H2O how many grams of anhydrous compound can be obtained
May 13, 2014 by mario

On Tuesday, Leslie spent 47 minutes on math homework, 39 minutes on science homework, 52 minutes on English homework, and 44 minutes on history homework. How much time did Leslie spend doing her homework on Tuesday?
April 6, 2015 by Maddie

College Algebra
The problems reads: "The equation x^2-9x=0 has 2 solutions A and B. Where A < B. The answers I got where x=0 and x=9, however my online homework is saying its incorrect. Please help me (x-9)x=0 x^2=9x (x-9/2)^2-81/4=0
June 2, 2014 by Anonymous

Who is correct? (chemistry issues here)
how can this person say that I googled info? (I created it randomly out of my head) and be so ungrateful that I spent the time out of my day to help? Or is it I don't know what I'm talking about and a "condensed structure" is not the answer to the homework problem, like I ...
May 6, 2008 by ~christina~

College chem
what is the empirical formular of the following compound: 0.142 g phosphorus with 0.436 g of fluorine.
October 7, 2014 by Nikki

Jance spend from 7pm to 9pm doing her homework. She spend 3 times as mach time on her english project as she did on math. the science homework took twice as long as her math homework. How meny minutes did she spend on her science homework?
April 24, 2014 by Daniel

From a group of 65 students who failed Business Mathematics in 2010 we found the following reasons: 35 for not attending class (C); 30 for not doing homework (H) and 25 for not visiting tutors (T). Fourteen did not attend class and did not visit tutors; 15 did not visit tutors...
March 11, 2017 by Michelle

College Chem
Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.
October 3, 2010 by Kelli

College Chem
How many mL of concentrated ammonia (14M) should be diluted to 250 mL to make a 0.75 M NH3 solution?
November 19, 2010 by Lisa

college chem
How many moles of O are needed to combine with 0.223 mole of C to form the following compounds? CO CO2
September 15, 2011 by tay

college chem
How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate
June 26, 2012 by Anonymous

college chem
calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c
February 4, 2013 by luis fernandez

Sociology college
Hello ! I need you help my homework By a narrow margin, Dr. Moreau was recently elected chair of the largest academic department are Faber College She has appointed faculty members who are loyal to her and support her views t o the most influential and important committees in ...
September 22, 2010 by Washington

chem homework
a gas occupies a volume of 410mL at 27 degrees Celcius and 740mm Hg pressure. Calculate the volume the has would occupy at STP.
November 30, 2010 by samantha

College Chem
If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true?
March 28, 2010 by Donna

College Chem
How many calories of energy are needed to vaporize a 20.2 g sample of liquid ethanol at its normal boiling point of 78 oC?
October 24, 2010 by Sam

College Chem 2
calculate the solunility of silver chromate, Ag2CrO4, in 0.005 M NA2CrO4- Ksp=2.6x10-12 Please help.....
March 3, 2012 by Deb

College Chem
How would temperature changes observed using a calorimeter differ for exothermic and endothermic reactions?
November 20, 2014 by sam

Identify the correct sentence. A. I did my homework when the doorbell was ringing. B. I do my homework when the doorbell is ringing. C. I was doing my homework when the doorbell rang. D. I was doing my homework when the doorbell rung C
April 15, 2014 by Angela

college inorganic chem
What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect
September 12, 2010 by moon

College Chem 1010
Which of the following compounds is insoluble? Question 4 options: A) Ca(NO3)2 B) FePO4 C) NH4OH D) Na2SO4 E) NaCl
April 15, 2012 by Sirena

College 103 Chem
How many grams of Sodium Phosphate would you need to make 225ml of 8.00M of stock solution? Thank you
July 10, 2013 by Andrew

college chem
A sample of O2 gas was collected over water at 23 degrees celsius and 772 torr. what is the partial pressure of the O2?
April 29, 2014 by ashley

Julian spent 45 minutes doing his math homework. He spent 35 minutes doing his science homework. Afterward, he did his reading homework. He ended up studying for 2 hours and 15 minutes altogether. How long did it take him to do his reading homework?
April 25, 2016 by renita

Chem question?
I have a homework question that says, If you were dissolving table salt in a beaker of water, what would a saturated solution look like (macroscopically)?
May 27, 2008 by Lisa

Hi, I need help with my homework, the homework is about multistep, I'm having issues with this subject and I need help.
December 7, 2016 by Anonymous

Does anyone have the book The Lanugage of Heath care I need chapters 3 4 5 so I can finish my homework. I ordered the book and it has not come in yet.
February 7, 2010 by Linda

college prep english
Ok so long story short I need help with homework......I have 3 questions on genre and its 2 genre's how do I know which one to write about ?
October 3, 2011 by amber

I have a question concerning Spring Semester
Im a freshman in college and I just took Chem1, Trig, and Drama (12units). I am planning on taking Chem2, Pre-Calc, and Art1 for spring sem. (13units). I'm not sure if this is too much to take for next semester considering two five unit classes or should I add another class? ...
December 22, 2011 by L.Bianchessi

College Algebra
Hello, I have been trying to do my math homework for a few hours now and can not figure out how to find the indicated intersection or union in interval notation. Example: (-1,5)n[0,8) Please help me!!
February 23, 2013 by Marie

Chem Help!
I really need help for my homework on balancing equations please show all the work including the coeffients if needed. I need help with 3 questions, 1) NaN3 -> Na + N2 2) NO2 + O2 -> NO + 03 3) LiOH + CO2 -> Li2CO3 + H2O
March 15, 2008 by Tania

College Chem
how do i figure out the percentage error , as well as the absolute error of a) (10.00+/- .02)mL x .42 mol/L b) (10.00 +/- .02)mL + (10.00 +/- .02)mL
January 16, 2009 by eddie

College Chem
What is the pH at the equivalence point in the titration of 0.250 M HX (Ka = 5.2 x 10^-6) with 0.250 M KOH?
March 28, 2011 by Angelina

college chem
how many milliliters of 0.200 M Na2S2O3 are needed to provide 0.0388 mol Na2S2O3?
June 2, 2009 by kelly

College Chem
The heat of combustion of ethanol is -29.8 kJ/g. What is the heat of cmbustion expressed in Joules per kilogram?
January 27, 2010 by Carleeta

college chem
What would the [OH-] be after addition of 17.47 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 3.16e-4)?
April 5, 2014 by hershi

There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...
October 8, 2015 by Hannah

math (please)
There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...
October 8, 2015 by Hannah

College Algebra
Consider the following Matrix: A= [-2 0 1 -1 -2 1 1 -1 0 ] Choose the correct description of A. Find A−1 if it exists. Multiple Choice homework question: 1) A is Nonsingular; that is, it has an inverse. A^-1= 2) A is singular; that is, its inverse doesn't exist. Thanks!
February 1, 2017 by Moses

college chem
How much heat (in Joules) is gained by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 15C?
March 8, 2010 by debra

College Chem
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
April 15, 2012 by Lance

College Chem
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
April 15, 2012 by Lance

college chem
europium crystallizes in a body-centered cubic cell (the Eu atoms occupy only lattice points). calculate the mass of the unit cells
February 4, 2013 by luis fernandez

College: Chem 1
What would be the molar concentration of the solute in each of the following solutions? a. 0.50 L containing 38.6 g of NaClO4 b. 0.25 L containing 41.5 g of C4H8O
October 8, 2013 by Anonymous

College Chem
4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl What are 3 ways you can speed the reaction in this equation?
March 29, 2010 by Kathleen

college Chem
A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C. How many gas particles are in this bubble?
April 8, 2010 by Russell

College Chem
I need to be able to describe how to prepare 20 mL of a 0.0050 M KIO3 solution from a stock solution with a concentration of 0.020 M.
October 3, 2010 by Kelli

College Chem
A diver exhales a bubble with a volume of 25 mL at a pressure of 2.4 atm and a temperature of 15 degrees C. how many gas particles are in this bubble?
November 29, 2010 by Jennifer

college chem 2
The enthalpy of vaporization of liquid diethyl ether is 26.0kJ/mol at 35'C calculate the deltaS' for vapor to liquid
March 24, 2014 by shel

June 4, 2007 by Linda Cunniffe

I'm doing a homework on Translating Word Equations and I wanted to know the answer for this question... Iron(ll) hydroxide reacts with hydrogen peroxide to produce iron(lll) hydroxide. Please help needed!
March 11, 2008 by Anonymus

Hi! I need help with my Chem homework. "When acetylene, C2H2, burns, how many liters of O2 at STp are used for every mole of acetylene burned?" (Balanced equation: 2 C2H2 + 5 O2 --> 4 CO2 + 2 H2O)
May 28, 2013 by Bridget

maths mixed fractions
jack spends 1 2/3 as longer on his homework as Jill last week, Jill spent 5 1/2 hours doing homework How long did jack spend doing homework? The week before jack spent 24 ½ hours doing homework How long did jill spend doing homework
January 15, 2012 by Anonymous

College Chemistry
How many milliliters of 1.55 M NaOH must be added to 125 mL of .19 M NaH2PO4 to make a buffer solution with a pH of 6.90? I have attempted to solve this with no success, as this is an online homework assignment that requires an exact answer. Hoping that you will be able to ...
November 20, 2010 by Elizabeth

Pedro spent 2 1/5 hours on his math himework and half as lomg on his science homework one weekend. If his english and social studies homework took 7/8 as long, how much time did he spent on homework that weekend?
November 4, 2016 by Anthony

sam spent a total of 5 2/3 hours doing homework. Julia spent 5 5/6 hours doing homework. who spent more time on homework this week? explain
February 22, 2012 by marshalena

College Help
I'm going to college this September, and would like to know of any good web sites for beginning college students.
July 28, 2008 by Sally

if something says your pursuing a college degree does that mean your in college are are planning in the future to go to college?
May 27, 2011 by Sara

I have finals coming up in a week and a half. I know I should have started studying earlier, but I just had an exam in my chem class and was focused on getting the information for that exam mastered before I started studying for the final. Now, I'm overwhelmed. I have no idea ...
November 30, 2009 by Katherine

College Accounting
Re: Homework Can you provide me with the trail blance for May: Comprehensive Problem 2 - The General's Favoriate Fishng Hole. I am really having a problem with this assignment and I would greatly appreciate your help. Thank you Diana Couturier
March 19, 2009 by Diana

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