# Posts by Cc

Total # Posts: 294

**Chem**

I know that is a diprotic acid and you do ICE and compare with each Ka value but I am not sure if I am setting it up the right way or doing the correct thing.

**Chem**

What is the PH of 0.0100M H2SO4?

**Chem**

so it would be Q<K so it would shift from left to right

**Chem**

Which direction will the following reaction in a 5.0 L flask proceed if Qp = 0.013? 2H2O(g) = 2H2(g) + O2(g) Kp = 1.6 x 10-5 Choose one answer. a. to the right because Q > Kp b. to the left because Q > Kp c. to the right because Q < Kp d. to the left because Q < Kp...

**Chem**

Kc=[HI]^2/[H2][I2] 54=(2x-0.3)^2/[X][X] THEN I GET: 54=4X-0.09/[X]^2 SO SQAURE ROOT IT THEN I GET 7.348*(x-x) =2X-0.3 7.4348X-7.348X=2X-0.3 tHEN i GET STUCK BECAUSE i DON'T KNWO IF THE VARIABLES x-x is suppose to be here? because when I calculate my answers don't add ...

**Chem**

Kc=[HI]^2/[H2][I2] 54=(2x-0.3)^2/[X][X] THEN I GET: 54=4X-0.09/[X]^2 SO SQAURE ROOT IT THEN I GET 7.348*(x-x) =2X-0.3 7.4348X-7.348X=2X-0.3 tHEN i GET STUCK BECAUSE i DON'T KNWO IF THE VARIABLES x-x is suppose to be here? because when I calculate my answers don't add ...

**Chem**

I have a question on this question would I forgo the sqaure root on this on because there is no sqaure except on the products side which is 2HI? I am lost because I set up ICE then got to: 54=(4X-0.09)^2/x*x Kc=[HI]^2/[x][x] At a particular temperature, Kc = 54 for the ...

**Chem**

I CALCULATED IT OUT TO Q = 1.80*10^3 SO IT WAS A RIGHT SHIFT FORWARD BC Q<K meaning that substances on left react to form substances on the left to reach eq... SO I GOT B as the answer IS THAT CORRECT????

**Chem**

A mixture is prepared with [CO] = 0.035, [Cl2] = 0.015, and [COCl2] = 0.95. It is known that Kc for the equilibrium is 1.2 x 10-3 at 400OC. Predict what will happen. Choose one answer. a. The reaction is at equilibrium so no net reaction occurs. b. The reaction occurs in the ...

**Chem**

At a particular temperature, Kc = 54 for the reaction H2(g) + I2 (g) <=> 2 HI(g). One mole of HI is placed in a 3.0-L container. What would be the equilibrium concentration of HI?

**Chem**

H2 + I2 = 2HI I 1.0/5.0 1.0/5.0 0 C -x -x 2x E 0.2-x 0.2-x 2x 54= [HI]^2/[H2]*[I] 54=2x^2/(0.2-x)(0.2-x) need to solve for x then would I take square root of both sides to get rid of the squares? Then I get stuck at 7.348= 4x/0.2-x I don't know where else to go from here ...

**Chem**

At a particular temperature, Kc = 54 for the reaction If 1.0 mole of H2 and 1.0 mole of I2 are placed in a 5.0 L container, what would be the equilibrium concentration of HI?

**chemistry**

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW 60.0g/mol) in 39 g of H2O is ______M. The density of the solution is 1.3 g/ml.

**chemistry**

A solution is prepared by dissolving 15.0 g of NH3 in 250.g of water. The density of the resulting solution is 0.974 g/ml. The mole fraction of NH3 in the solution is?

**Chemistry please help!**

How many ml of 9 M HCl are needed to neutralize 0.500 L of 0.350 M NaOH? Given the reaction CH4+2O2=C02+2H2O

**math**

if given ..,. y=4x^-4 if x triples what happens to y?

**math**

if given y=6x^4 if x doubles what happens tp y?

**college**

its a "hookes law" spring when its stretched

**6th grade**

why did the romans add volcanos to the fire that vulcan (roman god) can control

**chemistry**

A colloid is the dividing line between solutions and heterogenous mixtures. What is the exact particle size of a colloid compared to the exact particle size of a solution. A. over 1000nm compared to 0.1-1nm B. 1-1000nm compared to 0.01-1nm C. 0.10-1nm compared to 1-1000nm D. ...

**Chemistry**

Which of the solutions has the greatest osmotic pressure? Choose one answer. a. 10.0 g glucose in 1.00 L at 298 K b. 10.0 g glucose in 1.00 L at 303 K c. 10.0 g glucose in 0.500 L at 298 K d. 5.0 g glucose in 1.00 L at 298 K

**Chemistry**

I got it its 950 g

**Chemistry**

how would I find the mass of something from the molality..... How many grams of water should be added to 25.0 g of NaCl to produce a 0.450 m solution?

**chemistry**

How many grams of water should be added to 25.0 g of NaCl to produce a 0.450 m solution?

**Chemistry**

A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution? Choose one answer. a. 56.1 b. 43.9 c. 37.0 d. 58.8 When we calculated yesterday the answer was not B. 43.9....I got it wrong and don't know why if the math was correct and I ...

**Chemistry**

3.10g/ml *1mole Br/79.0g =0.039 mol/ml 0.039mol/ml * 2.00ml =0.0784 mol 1.05 g/ml * 1mol/60g = 0.0175 mol/ml * 125 ml =2.18 mole I don't know where I am going wrong becaus ethe answers are not same????????

**Chemistry**

What is the molality of a solution prepared by dissolving 2.00 mL of bromine (d = 3.103 g/mL) in 125 mL acelic acid, HC2H3O2 (d = 1.05 g/mL) Choose one answer. a. 0.301 b. 0.335 c. 0.296 d. 0.593

**chemistry**

I thought it was b. solid dissolves in the solution because in dynamic equil I thought that the excess ionic solute pass through the solution continuously as htdrated ions are deposited on surface of solute So the solid I though would dissolve in solution and add to solution.

**chemistry**

Which of the following is not true in a dynamic equillibrium describing a saturated solution? Choose one answer. a. solid crystalizes from solution b. solid dissolves in the solution c. concentration of dissolved solute remain constant d. rate of dissolving is double the rate ...

**Chemistry**

Calculate the molality of methanol in a solution prepared by dissolving 75.0 mL of methanol, CH3OH (d = 0.791 g/mL), in 150 g of ethanol, C2H5OH.

**Chemistry**

What is the mass percentage of 55.0 g of KCl in 125 g of water?

**Chemistry**

still not making sense because answers are a. 30.0 b. 35.3 c. 15.0 d. 28.9

**Chemistry**

200. g of a solvent is available, how many grams of a solute should be weighed out to make a 15.0% solution by mass?

**chemistry**

Calculate the molarity of a solution containing 40.0 g glucose (C6H12O6) in enough ethanol (C2H5OH) to make 40.0 mL of solution.

**chemistry**

A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.

**chemistry**

A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.

**Chemistry**

From the following: 1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of CaCl2 Choose the one with the largest van't Hoff factor and hence the lowest freezing point.

**CHM**

From the following: 1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of CaCl2 Choose the one with the largest van't Hoff factor and hence the lowest freezing point.

**chemistry**

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution

**Chemistry**

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution

**Chemistry**

Thanks so much I just found this site and it is helping me more than ever...

**Chemistry**

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution?

**chemistry**

thanks it was correct!

**chemistry**

A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution?

**economics**

According to the “guns and butter” example, if a country decides to spend more on military goods, which of the following will happen?

**economics**

the calculation of GDP would include?

**Health Information Technology**

Thank You Writeacher

**Health Information Technology**

I need help with this problem I can not figure this out I had came up with five different answers and I really would like to get the correct answer. Memorial Hospital currently has 1,850 linear filing inches used. It is projected that over the next 5 to 8 years an additional ...

**ecology**

what is the type of ecological relationship that can involve either memebers of the same or different species and in which both participants are harmed?

**Economics**

Which of the following is NOT a reason for unequal income distribution? education location discrimination size of family I want to say location, but I'm not 100% sure

**math**

-2.378 is it a rational or irrational

**math**

Thanks MathMate, boy looks like i was way off. thanks for the help cc

**math**

how many rectangles are there on a chess board? i've tried twice and got 168 is this right? my friend said i'm way short. any help would be much appreciated. thank you

**SCI 275**

Atmospheric Issues

**SCI 275**

The Population Size explain the four factors that produce changes in population size. Which factors are affecting the population size in the video? What do you predict will happen to the nutria population ater all the land is depleted of the nutrias' food resource?

**Algebra 1: 8th Grade**

Thats funny...im in 7th grade and im in algebra 1...anyway...why do u need help with this??? its simple exponents and division...

**Physics**

Thanks. This is what I thought but again the answer in my book was incorrect. So frustrating.

**Physics**

If the co-efficient of static friction for a 5 kg rubber block is 0.3 how much more force is required to lift the block than to start it sliding? I worked out force to get it sliding is 14.7 N (5*9.8*.3) but not sure about the upward force to lift it.

**Physics**

Yes, that's my answer too. Incorrect answers at the back of the book drive me crazy! thanks for confirming!

**Physics**

The co-efficient for static friction for a 5 kg box on a floor is .72. How much force if required to start the box sliding? I worked it as follows: Force of friction=Force normal * co-effic. of friction which is .72*5*9.8=35.28 but answer in back of my book says this is wrong...

**Algebra**

since you need to solve the system of equations by substitution, solve the first equation for x by subtracting 4y from both sides. You will get x = -5 - 4y. Next substitute this expression into the x of the 2nd equation to get 3(-5 - 4y)- 8y =45 Now use the distributive ...

**math**

how do you write 2 3/8 as a percentage/

**Math**

00001, 00011, 00101, ?, 01001 1,3,5,?,9 ? = 00111 This is Binary code converted to decimals

**FRENCH**

How does one translate "that will be fun" into French? Thank you!

**history**

US West, Era of Andrew Jackson

**history**

why did the aristocracy of the West have greater faith in the common man?

**philosophy**

is the world dominated by money?

**Math**

-10<-2+8<22

**sose**

why does farming take alot of water?

**SCIENCE**

I NEED A HYPOTHESIS A LANDOWNER COULD TEST TO PROVIDE EVIDENCE TO HELP DECIDE WHAT ACTIONS COULD BE TAKEN TO REDUCE EROSION ON A STEEP HILLSIDE?

**pigskin geography**

well said.

**8th grade technology**

what are good sites to study for technology final exams? This site may help you. http://www.homewood.k12.al.us/middleschool/staff/whip/8thgradeproftests.htm However, your best preparation is go study your text and your notes and any handouts your teacher has given you.

**science**

oky i have to make a tornadod simulator but what can i make it out of http://www.facethewind.com/tornsim/tornsim.html has some good suggstions

**chem.**

if gas is $4.20 a liter, how much will it cost to fill a 14-gallon tank? conversion factor: $4.20L 1.06qt 1gal ______x________x______ 1 1L 4qt i have no clue how to set it up. i'm confused. <font color=blue>nevermind about the problem. good night.</font> You ...

**random**

what kind of website is this? what is jiskha? Jiskha is the name given to the site by the man who runs the show here. His name is Leo. This is a help site with the emphasis on help. We try to help students do their homework. But we like to see what the student can do, then we ...

**chemistry**

question: "If gas is $1.20 per gallon, how much would it cost to fill a 50-liter tank?" using conversion factor. 1 L = 1.056 quarts. 4 quarts = 1 gallon. Convert 50 L to gallons and multiply by 1.20/gallon. Let me know if this is sufficient. I think I got it. Thanks.

**Help!**

I don't know What United States did for genocide of darfur. Please tell me about it too. I know some site, so please give me some comment of that answer.

**Help**

Tell me how AU, DLF, JEM, SLA, SLM, SPLA and UNSC assist the victims of Genocide of Darfur. Simply answer is fine. So please someone teach me how they were helped geonocide of Darfur. I already got some site. So I just make sure how they did.

**HELP!!!**

I'm researching about Genocide of Durfur now. I want to find who has been assisting the victims. So someone please give me some good site about who assisting dardur's victims. I think some country and group were helping them. Please give me good cite. Thank you http://...

**‚g‚d‚k‚oIII**

Give two examples of federalism in the United States. http://en.wikipedia.org/wiki/Federalism http://plato.stanford.edu/entries/federalism/ http://www.closeup.org/federal.htm =)

**US government**

How is debate handled in the Senate? How is debate handled in the House? someone please answer it. anything you know about it. PLEASE!! Since this is not my area of expertise, I searched Google under the key words "US senate house debate rules" to get these possible ...

**government**

I am doing research project. it is about political speeches. I should find about "benefit seekers". what is benefit seekers mean? and what kind of sentence should I find. give me some examples. thank you. You can find out more about the quotation below from this site...

**Science**

How can an animal be both predator and prey? Ever see a cat watching a bird eating a worm?

**Watershed?**

Hey RR Im in flvs too(luv it <3)and could not find any info on this question. Thanks so much :D I have been searching for like 30 minutes to an hour.

**government**

How did the constitutional delegates solve these problems? Secret ballots I think~ don't quote me I could be wrong. Ken is wrong. The delegates compromised, and you need to expand on the compromises. They are in in your text.

**government**

what three issues caused the most conflict during the constitutional convention? Wheather to keep the Articles of Confederation or generate a completly new document, states rights and, Individual rights. Acording to the Word book Encyclopedia, Circa 1977. I think the role and ...

**HELP!**

What caused states to demand a constitutional Convention and explain why? What three issues caused the most conflict during the Constitutional Convention and why? How did the COnstitutional delegates solve these problems? Plese tell me good site and teach me what these ...

**Help!!**

What caused states to demand a constitutional Convention and explain why? What three issues caused the most conflict during the Constitutional Convention and why? How did the COnstitutional delegates solve these problems? Plese tell me good site and teach me what these ...

**HELP!**

Name and explain 3 problems of the Articles of Confederation. What is this question mean? and someone please give me some good site. i learned that last year the articles of confederation were one of the first governments after the revolution name three problems of the ...

**HELP!**

What caused states to demand a constitutional Convention and explain why? What three issues caused the most conflict during the Constitutional Convention and why? How did the COnstitutional delegates solve these problems? Plese tell me good site and teach me what these ...

**HELP!**

Name and explain 3 problems of the Articles of Confederation. What is this question mean? and someone please give me some good site.

**government**

What caused states to demand a constitutional Convention and explain why? What three issues caused the most conflict during the Constitutional Convention and why? How did the COnstitutional delegates solve these problems? Please tell me how to answer the each question.

**government**

Name and explain 3 problems of the Articles of Confederation. How can I answer that question? You'll need to check your textbook to find the parts of the Articles of Confederation that were not included in the Constitution. Look for things like states' rights and the ...

**sociology**

Wow, I can not wait till this class is over with. Second week and I hate it already