# homework college chem

20,407 results

**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?

**english**

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

**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

**To Jen: College**

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**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.

**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.

**english**

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 ...

**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...

**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 ...

**college physics**

cost of homework help for college physics

**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?

**Wilkins**

Will you please help me with my week 5 Axia College homework?

**College CHEM**

Name for Sn(BrO3)

**college chem**

a compound containing

**Chemistry**

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

**statistics**

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?

**math**

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

**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?

**ENGLISH**

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...

**Math**

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 ?

**College Chem**

How many molecules of CH3OH will contain 3.20 x 10^23 H atoms?

**college chem**

Calculate the molarity of the solution: 42.6 g NaCl in 1.58 L

**To DrBob222(Please check Chem)**

(This homework question has been removed due to a copyright claim submitted by K12 Inc.)

**Chemisty**

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!

**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/

**college chem**

calculate the density of O2 gas( in g/L) at 1.22 atm and 25 degrees C

**College Chem**

Is the percentage of sodium in pure table salt 39.34%?

**college chem**

PLEASE..Determine [OH-]of a solution that is 0.270 M in HCO3-...thanks

**college - chem**

how do i find the amount of moles of H2O in a hydrate?

**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

**Chem**

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

**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

**English**

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?)

**College Chem II**

Determine the [H3O+] of a 0.160M solution of benzoic acid.

**college kinetics chem**

what is the rate law for 2OF2 yeilds O2 + 2F2

**College Chem**

How many moles of O atoms are there in a sample of 86g sucrose (C12H22O11)?

**College Chem**

Calculate the total number of electrons that can be present in the principal level for which n = 4.

**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?

**College Chem**

How much heat (in kJ) is absorbed when 10.0mL of liquid ethanol vaporizes?

**college chem**

Calculate the Mole Fraction of benzene in toluene if there are 5 grams of each in the mixture

**college chem**

125g MgSO4 • 7 H2O how many grams of anhydrous compound can be obtained

**Math**

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?

**math**

the stem-and-leaf plot shows the height, in inches, of the players on two different basketball teams. How many players on each team are less than 70 inches tall? Heights of Players In inches Austin College Barton College Leaf Stem Leaf 6 7 8 8 9 6 4 6 8 1 1 2 6 7 1 1 1 3 4 5 1...

**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

**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 ...

**College chem**

what is the empirical formular of the following compound: 0.142 g phosphorus with 0.436 g of fluorine.

**Math**

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?

**math**

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...

**College Chem**

Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.

**College Chem**

How many mL of concentrated ammonia (14M) should be diluted to 250 mL to make a 0.75 M NH3 solution?

**college chem**

How many moles of O are needed to combine with 0.223 mole of C to form the following compounds? CO CO2

**college chem**

How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate

**college chem**

calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c

**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 ...

**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.

**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?

**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?

**College Chem 2**

calculate the solunility of silver chromate, Ag2CrO4, in 0.005 M NA2CrO4- Ksp=2.6x10-12 Please help.....

**College Chem**

How would temperature changes observed using a calorimeter differ for exothermic and endothermic reactions?

**English**

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

**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

**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

**College 103 Chem**

How many grams of Sodium Phosphate would you need to make 225ml of 8.00M of stock solution? Thank you

**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?

**math**

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?

**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)?

**Homework**

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

**college**

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.

**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 ?

**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? ...

**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!!

**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

**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

**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?

**college chem**

how many milliliters of 0.200 M Na2S2O3 are needed to provide 0.0388 mol Na2S2O3?

**College Chem**

The heat of combustion of ethanol is -29.8 kJ/g. What is the heat of cmbustion expressed in Joules per kilogram?

**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)?

**Math**

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 ...

**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 ...

**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?

**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.

**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.

**college chem**

europium crystallizes in a body-centered cubic cell (the Eu atoms occupy only lattice points). calculate the mass of the unit cells

**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!

**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

**CHEM.**

HELLO AND GOOD EVENING EVERYONE mY QUESTION THAT IS QUITE MAKING ME FRUSTERATED IS : HOW MANY MASSES OF Cl2 MOECULE WOULD I EXPECT TO FIND IN A SAMPLE OF CHLORINE GAS? AND IT IS FOR SURE A GAS PLEASE HELP ME WITH MY HOMEWORK THANKYOU

**College Chem**

4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl What are 3 ways you can speed the reaction in this equation?

**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?

**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.

**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?

**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

**Chem**

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!

**Chemu**

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)

**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

**Math**

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?

**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 ...

**math**

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

**College Help**

I'm going to college this September, and would like to know of any good web sites for beginning college students.

**misc.**

if something says your pursuing a college degree does that mean your in college are are planning in the future to go to college?

**Final-Chemistry**

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 ...