Saturday

March 28, 2015

March 28, 2015

Total # Posts: 758

**Chemistry**

Wilh this form a buffer? 50 mL of .10 M HCl; 35 mL of .150 M NaOH WORK: Moles of HCl= .005 Moles of NaOH= .00525 total litres of solution= .05 + .035= .085 L [HCl]= .005 mol/.085 L = .0588 M [NaOH]= .00525 mol/ .085 L = .0618 M Ka of HCl= 1.3*10^6 pKa= -log(1.3*10^6) = -6.114 ...
*March 22, 2010*

**chemistry**

Will this solution form a buffer? 100 mL of .10 M NH3; 100 mL of .15 M NH4Cl Work: NH3= .01 moles NH4Cl= .015 moles .... not sure what else to do. I think we use the H-H equation, but I don't know how to find pKa, or even what pKa is. This should give the pH of the ...
*March 19, 2010*

**pre algebra**

r=2
*March 18, 2010*

**French**

Can you please check these Choose A. Le caissier m'a donné 200 euros en liquide. B. Je suis toujours fauché. C. Le caissier m'a donné 10 billets de dix. D. J'aime mettre de l'argent de côté. 1. -------- J'ai touché ...
*March 15, 2010*

**education**

Transition planning for children with special needs should focus primarily on: a.maintaining continuity of services b.getting the child ready for school c.the family's needs d.the child's needs
*March 8, 2010*

**education**

A major goal of a child's transition to a new program is to: a.meet new people b.learn new skills c.meet new teachers d.transfer skills
*March 8, 2010*

**education**

1.Transition planning for children with special needs should focus primarily on: a.maintaining continuity of services b.getting the child ready for school c.the family's needs d.the child's needs. My answer is d.the child's needs. Will someone please check my answer
*March 8, 2010*

**early childhood education**

A.a bad personality
*March 8, 2010*

**early childhood education**

1.A child's noncompliance is often due to all of the following EXCEPT: a.too many rules b.not enough choices c.poor ability to understand d.a bad personality
*March 8, 2010*

**college**

B."Walk in the hallway"
*March 8, 2010*

**college**

1.You want children to walk in the hallway.If they begin to run,the best thing to say to redirect them is:a."Stop running" b."Walk in the hallway" c."Running is for outside" d."We don't run"
*March 8, 2010*

**Computer Data Analysis**

How to apply the concepts of readability,reusability,and reliability in the use of spreadsheets.Do you think these really matter in the workplace? How about charting?
*March 6, 2010*

**math**

suppose you are starting an office-clening service. You have spent $315 on equipment.To clean an office, you use $4 worth of supplies.Yoou charge $25 per office. How many offices must you clean to break even?
*February 24, 2010*

**Computers**

Hi, I have an IT programming question but I'm not sure what the question means exactly. Question: Make an immutable class to represent DNA and RNA, these classes must wrap around a mutable character array the contents of which is used to set the state of these objects ...
*February 18, 2010*

**Computers**

Hi, does anyone know the difference between "public int getId()" and "public static int getId()" and when would you use them? thanks
*February 8, 2010*

**math**

40 is the answer. You are right :)
*February 8, 2010*

**Math**

4% of 1058.3 = B)
*January 31, 2010*

**Algebra**

Thanks Damon and Reiny, it helped a lot. Really appreciate it :)
*January 31, 2010*

**Algebra**

Hi, I'm struggling to do two questions. 1) If ||u||=2, ||v||=root 3 and u dot v = 1, find ||u+v|| 2)Show that there are no vectors u and v such that ||u|| = 1, ||v||=2 and u dot v = 3 Please help if you can. Thanks a million
*January 31, 2010*

**algebra**

b would be the y-int. Therefore b = 3 then sub the pt (-16,0) into the equation and solve for m.
*January 31, 2010*

**algebra**

- x = 1 11 26
*January 26, 2010*

**french**

Pouvez-vous me tansformer le mot gratÃ©sinoge en un vrai mot franÃ§ais?
*January 25, 2010*

**français**

Qu'est-ce que gratÃ©sinogÃ©?
*January 25, 2010*

**math**

what are the odds of drawing a spade and a heart out of a regular deck of playing cards?
*January 23, 2010*

**math**

N/3 + 6 = 10
*January 23, 2010*

**your own opnion**

do you think chocolate is pure? why or why not?
*January 18, 2010*

**a matter of opinion**

do you think chocolate is pure? why or why not?
*January 18, 2010*

**graphs**

the number in the data file are 71,56,62,77,38 what scale would you use to graph the data
*January 13, 2010*

**simple equations ( math)**

Divide 300 cards between Ann and Elizabeth so that Ann has 5 times as many as Elizebeth's cards
*January 10, 2010*

**simple equations ( math)**

Oh. ook ... thank you for your help
*January 10, 2010*

**simple equations ( math)**

ohyes sorry i meant that. 3/4 of 100 is 75 so the rest is 25
*January 10, 2010*

**simple equations ( math)**

so altogether the have $100. Joseph has 3 time more then Peter. would joseph have $75 and Peter have $15 ?
*January 10, 2010*

**simple equations ( math)**

sorry i don't understand
*January 10, 2010*

**simple equations ( math)**

Share $100 between Joseph and Peter so that Joseph has 3 times as much as Peter.
*January 10, 2010*

**simple equations ( math)**

Mary has $38 and Jane has $12. How much must Mary give Jane so that they both have the same amount>?
*January 10, 2010*

**simple equations ( math)**

Let X= the n Peter's weight. 216 * 4/3 = 48 kg... am i right?
*January 10, 2010*

**simple equations ( math)**

well.... 36kg * 4/3 ???
*January 10, 2010*

**simple equations ( math)**

Tom's weight is 3/4 of Peter's. If Tom weighs 36kg, find the weight of Peters
*January 10, 2010*

**simple equations ( math)**

ook thanksss
*January 10, 2010*

**simple equations ( math)**

A shop sold 216 pairs of shoes in a month, which was equal to 60% of the number of pairs in the shop. How many pairs of shoes were in the shop at first??
*January 10, 2010*

**math**

how do u right it like a formula or a equation?? ex. X + 18 ..... ?
*January 10, 2010*

**math**

There are18 colour pages in a magazine, which is equal to 2(over)5 of the book. how many pages are there in the whole book? Please show the steps. thanks
*January 10, 2010*

**gr.7 math**

State whether or not each figure has rotational symmetry. a) scalene triangle b) equilateral triangle c) rectangle d) square e) regular hexagon
*January 6, 2010*

**math**

what is the tenths place?
*December 23, 2009*

**math**

what is the Tenths place
*December 23, 2009*

**sewing.**

can someone tell me if my answers are correct or not? thank you :) If your sewing machine were skipping stitches,wat would u check first? A.bobbin stitches B.needle setting C.thread type D.tucker my answer:A How do you secure the beginning and end of every seam? A.add a double...
*December 16, 2009*

**design.**

thanks guys :)
*December 15, 2009*

**design.**

pls help me answer this question. thank you:) youre repairing an armhole seam in a turtleneck used primarily for skiing.The stitching has come loose because of the extra movement.What type of hand stitch do you use? A.backstitch B.slipstitch C.running stitch D.blind stitch
*December 15, 2009*

**math 6 grade**

36
*December 3, 2009*

**history**

grade 7
*December 2, 2009*

**history**

its doesn't say anything. its just a question
*December 2, 2009*

**history**

how native cultures affected eropeans
*December 2, 2009*

**history**

umm which one do i choose?
*December 2, 2009*

**history**

is there more to it? any websites?
*December 2, 2009*

**history**

how the arrival of Europeans in north america affected native cultures
*December 2, 2009*

**Technology discovery**

History of development and applications of electrcity. A 3-5 page report. My mom is sick and I have no idea where to begin. Please help! Thank you
*November 29, 2009*

**math**

A certain number when divided by 4, 5 or 7 will have a remainder of 3, 4 and 6 respectively. Find the least possible value of the number. ( L.C.M. of 4, 5. 7) -1
*November 27, 2009*

**college english**

i have to write a 700 word essay on what will it mean to america if the economy declines in coming decades? What will happen if our debt is controlled by china? should we worry? I need help understanding what would happen if china held our debt
*November 23, 2009*

**Tecnology Discovery**

I Need a current event in technology discovery
*November 12, 2009*

**bookz**

could i find a geometry book at the libray?
*October 26, 2009*

**gr.7 math**

thank you!!!!
*October 26, 2009*

**gr.7 math**

what set of intervals would you choose to create a stem-and-leaf-plot for each set of data? 263 282 274 265 277 281 277 283 272 267
*October 26, 2009*

**geometry**

if <def < abc then <def <abc
*October 14, 2009*

**chemistry**

2 Mg(s) + O2(g)= 2 MgO(s) ÄH= -1204 kJ How many grams of MgO are produced during an enthalpy change of 96.0 kJ?
*October 2, 2009*

**Chemistry**

Okay so I need help with this question: How many grams of NH3 can be produced from 3.87 mol of N2? Can someone tell me how to do this probelm? Maybe do the question with a different set of numbers just so that I can see how to do it? Thank you!
*September 24, 2009*

**math**

im sorry but i do not understand :(
*September 23, 2009*

**math**

All the numbers from 1 to 99 are multiplied together. Use a pattern to determine the last digit of the product. Justify your answer.
*September 23, 2009*

**Social Studies**

What country set up the first merchant company?
*September 17, 2009*

**5th grade social studies**

i dunno! can u help me on this What country set up the first merchant company? ITTSSSS TOOOOO HAAAARRRD
*September 17, 2009*

**religion**

How has religion shaped life for people in India?
*September 14, 2009*

**psychology**

•Describe neurotransmitters. Explain what they are, their function within the body, and their impact on behavior.
*September 12, 2009*

**math**

is this math problem correct? 9+(-3)=6
*September 8, 2009*

**adult education**

Math If the line passing through the points (1,a) and (4,-2)is parallel to the line passing through the points (2,8) and (-7,a + 4), What is the value of a ? Please help, I don't understand how to set this one up.
*May 26, 2009*

**Math Application**

World grain demand. Freeport McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only 3/4 of world grain demand. What will world grain demand be in 2010
*May 25, 2009*

**Physical Science**

1: the answer is a. It remains constant. The other two are right.
*May 22, 2009*

**English**

In class, we worked with the idea that history has shown that societies that are controlled by the government cannot prosper. what are some examples of this and what would make them examples ? womens rights movement ? civil rights movement ?
*May 3, 2009*

**chem**

i'm problems with the same question, did you find out the correct answer? and to clarify, the question is asking the [H30+] concentration when the 2 are mixed, so you have to use the common ion effect method.
*April 16, 2009*

**Research paper topics**

I NEED TOPICS AVOUT CHEMISTRY !
*March 31, 2009*

**Geography**

what are physical and human features on an island
*March 17, 2009*

**Literature / Short story I**

THOSE ANSWERS ARE WRONG! I GOT A 30 , I RETOOK THE TEST AND I HAVE PICTURES TO PROVE THOSE ANSWER YOU GIVEN ARE WRONG!!!!!!
*March 13, 2009*

**music**

a set of instumental compositions
*March 3, 2009*

**science**

what eventually happens to medium mass stars? i know small stars don't die out as quickly as more massive ones, but i'm having a hard time figuring out what happens to the medium mass ones. thank you.
*February 18, 2009*

**History**

make an outline. it will help. write the thesis at the top and find at least 3 main points that support the idea that his actions made an impact. also you should try narrowing the legacy part down. how did all the things he do better/influence the world? try to fit the legacy ...
*February 18, 2009*

**algebra 2 honors**

how do you solve problems like : log3x-log5=1
*February 11, 2009*

**math**

Sam's birthday is 186 days after Jim's birthday. Susan's is 24 days after Jim's. Sam was born on September 6th. What day was Susan born on if it wasn't a leap year?
*January 6, 2009*

**Cabrillo High School**

What is the empire that shrunk to 1/3 its size by 1914?
*December 15, 2008*

**Chemistry**

Part I: Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. Melting Point (4 points) Conductivity (4 points)
*November 29, 2008*

**geometry**

18x-8 6x+4 find x
*November 11, 2008*

**AP world history**

i have to take this big unit test on this college textbook called "Traditions and Encounters" on the first 6 chapters which is 166 pages overall. The test is this Monday. I have my chapter notes, quizzes, maps, and study questions. Although, what is the best way to ...
*November 1, 2008*

**chemistry**

sorry to keep bugging you, but if it makes you feel better i am understanding it more. what if you have the same numbers, but you are trying to find the concentration of an UNKNOWN acid. all you have is: Volume of Unknown Acid Volume of Stock Solution Concentration of Stock ...
*October 31, 2008*

**Chemistry.**

that did make sense, and my little mistake was the conversion from mL to L. i referenced into some of my material and i believe the standard acid is probably H2SO4 so i will try it out and see my result. sorry to keep bugging you, but if it makes you feel better i am ...
*October 31, 2008*

**Chemistry.**

hi again, thanks to the previous help i got the first part of the question. the second part builds on the first part as we used that stock solution for titration of the next. we are now given: Concentration of Standard Acid Soultion (M) = 0.100 M Volume of Standard Acid ...
*October 31, 2008*

**chemistry (continued)**

yep just saw, thanks :)
*October 31, 2008*

**chemistry (continued)**

nvm
*October 31, 2008*

**chemistry (continued)**

i kinda understand waht you're saying. to be a bit more clear this is from a lab, and here are the volumes we retrieved: Volume of Concentrated NaOH soultion (mL) = 9.00 mL Concentration of Concentrated NaOH soultuon (M) = 6.00 M Volume of Stock Solution after Dilution (mL...
*October 31, 2008*

**Chemistry**

OMG, i totally understand that. DrBob222, THANK YOU VEYR MUCH!
*October 31, 2008*

**Chemistry**

i kinda understand waht you're saying. to be a bit more clear this is from a lab, and here are the volumes we retrieved: Volume of Concentrated NaOH soultion (mL) = 9.00 mL Concentration of Concentrated NaOH soultuon (M) = 6.00 M Volume of Stock Solution after Dilution (mL...
*October 31, 2008*

**Chemistry**

I've been given the Volume of Concentrated NaOh solution (mL) and also the Concentration of Concentrated NaOh solution (M). I also have the volume of stock solution after dilution (mL). The question is asking the approximate concentration of stock solution (M) any help?
*October 31, 2008*

**5th Grade Math**

ola
*October 23, 2008*

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