1. Extraction equations

We did an extraction. A solid including benzoid acid, p-nitroaniline, and napthalene was dissolved in dichloromethane. HCl was added to give the aqueous salt of p-nitroanaline. NaOH was added to give the aqueous salt of benzoic acid. Napthalene remained.

2. history

How did Jeffersonian Democracy hope to remove obstacles to upward social mobility? How is it different from Jacksonian Democracy? Jeffersonian Democracy: http://en.wikipedia.org/wiki/Jeffersonian_democracy and

I wanted to welcome you ASAP to our little family here in the States. It's high time we shook hands in person and not just across the sea. I'm pleased as punch about getting to know you all, and I for one will do my level best to sell you on America. are

4. SCIENCE QUESTION

LEAD IS A SOFT, DENSE METAL WITH A SPECIFIC HEAT OF 0.028KCAL/KGC, A MELTING POINT OF 328.0C, AND A HEAT FUSION OF5.5KCAL/KG. HOW MUCH HEAT MUST BE PROVIDED TO MELT A 250.0KG SAMPLE OF LEAD WITH A TEMPERATURE OF 20.0C? Figure the heat to heat if from 20C

5. phys.

Hey, i feel kinda embarassed asking this because it looks so simple. a mass of 300kg which is positioned 1000m above the ground is allowed to fall to the ground. what will be its velocity on impact? Use the basic velocity formula. Initial velocity is zero;

6. Chem Titration and pH

Calculate the pH at 0mL, 5mL,...40mL for a 10.0mL aliquote of 0.100M Na3AsO4 (weak base) titrated with 0.100M HCl pKa1 = 2.25 pKa2 = 6.77 pKa3 = 11.60 Thank you First you should write equations to know where we are in the titration. At the beginning, we

7. Accounting Entry

"Received \$2000 from a client for financial services to be rendered next year." I am supposed to record the general journal entry for this. Would it be this: Cash \$2000 A/R \$2000 or what? This entry is for the last day of the fiscal year, too. Please help

8. Principle of operation

Regarding extraction, the heading is: Descripton of method. Principle of operation. My description is: Extraction is based on the principle that a certain solute will dissolve in two immiscible phases, one of which is usually liquid. For example, where one

9. Easy Math

Find the only integer between 1500, and 2500 which is ans integral multiple of both 2 to the power of five and 2 to the power of 5 subtract 1. 2^5 = 32 2^5 - 1 = 31 However, 32 x 31 = 992, which is not between 1500 and 2500. Multiplying again by either

10. Easy Math

This seems like an easy question yet I am not able to comprhend. Question: Inher latest game, Mary bowled 199 and raised her average to 179 from 178. To raise her average to 180 with the next game, what must she bowl? Her average was 178. The average is

11. math

100 people set up a phone call system so that the initial contact person call three persons, each of whom calla three persons,and so on until all have been contacted. The maximum people who do not need to make calls is? Very Simple Question How would you

12. Grams

How many grams are there in an ounce? Thanks from Sheryl There are 453.592 grams in a pound so divide that by 16 to get 1 oz = 28.3495231 grams How can I teach someone else to read? That's a good question and I'll let the experts give you a complete

13. Chemistry

WHy is Copper an exception in electron configuration? Copper is not an exception except in our minds. The exception lies in our attempt to explain electron configurations. In the case of Cu and Cr for the 3d series, they don't fall into our neat pattern;

14. Chemistry

The nitration of nitrobenzene at room temperature gives 1,3-dinitrobenzene, but not 1,3,5-trinitrobenzene, despite the use of excess reagents. Why is the reaction selective? I think that under ordinary circumstances, at room temperature, some

15. SCIENCE QUESTION

A 50.0G SILVER SPOON AT 20.0C IS PLACED IN A CUP OF COFFEE AT 90.0C. HOW MUCH HEAT DOES THE SPOON ABSORB FROM THE COFFEE TO REACH A TEMPERATURE OF 89.0C?

16. Chem teacherf

My teacher last year in General Chemistry was really great. She was highly organized, always prepared for class, approachable and fair. Chemistry is such a hard class that she really helped me get through it. My Organic teacher is another story. She is a

17. division of fractions

Division of fractions is sometimes said to be multiplication of inverses. Elaborate with an explanation and example. If you have a/b divided by c/d this is the same as a/b * d/c If e.g., we have 2/3 divided by 7/9 then we have 2/3 * 9/7 = 6/7 When dividing

18. Physics HELP!

a rock is thrown vertically upwards with an initial velocity of 30 m/s. Neglecting air resistance, calculate a) the maximum height reached b) the time taken to reach maximum height PLEASE help with this

19. Easy Math

The number of positive integers that are less than 500 and that are not divisable by 2 or 3 is? There are 250 divisible by 2, 166 divisible by 3 and 83 divisible by both. So 250 + 166 - 83 = the numbers divisible by 2 or 3, without double counting.

20. help please, up for it?

a rock is thrown vertically upwards with an initial velocity of 30 m/s. Neglecting air resistance, calculate a) the maximum height reached b) the time taken to reach maximum height v1 = 30 m/s v2 = 0 m/s a = negative gravity simple plug n chug to find

21. Reverse Equations

a four-component mixture was extracted. In the mixture was R-phenol, RCOOH, RNH2 and R-(C=O)-R in solution with ether and aqueous NaHCO3. RCOO-NA+ was separated out on the water layer. Aq. NaOH was added to the ether layer and R-benzene-O-Na+ was separated

22. Physics

A rocketship, travelling away from earth with a speed of 0.8c, sends regular radio signals which are received on Earth every 45.2 min. According to the rocketship astronauts, how frequently are the signals being sent? I really need help. Its a basic

23. Fractions and Integers

If x/4+y/5=19/20 where x and y are positive integers then x+y is? If you multiply through by 20 then you'll have 5x+4y=19 where x and y are positivie integers. Can you solve that? Hint: you only need to look at the integers less than 4. Thanx a lot.

24. math

if (2x-3):(y+4)=k where k is a constant and x=4 when y=2 then find x when y=-6 What does the : between the factor mean? (2x-3) : (y+4)=k Multi[lication? If so, substitute 4 for x and 2 for y to get (2*4-3):(2+4)=k = 5*6 Then solve for x in (2x-3):(-6+4)=30

25. Chemistry

I'm having difficulty on drawing lewis dot structures for certain compounds and figuring out the molecular shape. I can do the simple ones like IO4- which is tetrahedral...but i'm stumped on ICl4-. When i drew the structure I thought it was octahedral, but

26. English

WHy is the importance of being open to new ideas? This is a very vague question, but this is my thought: The question of the importance of being is open to new ideas because it is an unsolvable question. Being unsolvable, new perspectives will always come

27. Pressure and Force

Hello, I am looking for the equation to solve this problem: 1. A .75 kg object with dimensions 24 and 20 are on a table. What force does the object apply to the table? What pressure does the book apply? Thanks! Force = Mass * Acceleration (or in this case,

28. Statistics

I dont' really understand this question. The construction industry has determined that the average time to construct a two floor, family house in Westchester County, New York takes 85 days -- with a deviation of 10 days. Mr. Cox wants to purchase a new

29. ethics

I need to start working on my class final i just started my class at WUO I have to do an autobiographical research paper on race in my community I just don't know where to start or how to start an autobiographical can someone give me ideas or help me with

30. More of that darn physics

a shell is fired with a velocity of 75 m/s at an angle of 55 degrees to the horizontal. calculate the * horizontal and vertical components of the velocity * greatest height above ground attained by the shell * horizontal distance travelled by the shell

31. MATH

If k=-4 then the value of (2k)^3-2k^3 is? Nevermind. That was an easy question. I got it. If you would still like to answer go ahead. It will help verify. subts k= -4 in where you see K kinda simple it should look like 2(-4)^3 - 2(-4)^3 You can do the rest

32. MATH

If 1+(1/2^2)+(1/3^2)+(1/4^2)+(1/5^2)+...= x then the value of 1+(1/2^2)+(1/4^2)+(1/6^2)+(1/8^2)+... is? Let's write out the terms so it's a little more readable. 1 + 1/4 + 1/9 + 1/16 + 1/25 + ... = x and 1 + 1/4 + 1/16 + 1/36 + 1/64 +... = ? Can you see

33. math

Very Simple Question How would you solve it: (1+x^2)(1-x^3) Check below

34. Help...pHysics

a ball is thrown at 15m/s at an angle of 30 degrees to the horizontal , how far does it travel horizontally before making contact with the ground? I don't remember very well, but I believe the formula you need is: x0 = -.5at^2 + vt + x where x0 is the

35. Accounting

How can I calculate the net income if I only know the assets total and liabilities total from both the beginning of the year and the end of th eyear? Net income is related calculated using revenues less expenses. Assets and liabilities are involved, but

36. history

Hi, ummm, can someone please help me with this question? What are some reasons that the victory of the management in the Homestead Strike was positive for American society? And negative? Thank you! I'm not much of a history person, but I think this might

37. Physics

Hi, i'm kinda lost with this one. a ball is thrown at 15m/s at an angle of 30 degrees to the horizontal , how far does it travel horizontally before making contact with the ground? THANKS IN ADVANCE! You'll need to determine how long the object is in the

38. Science / Geography

Losing Your Bearings 1. Begin journey at 40 degrees N by 77 degrees W. 2. Travel 4200 miles with a compass bearing of 130 degrees. 3. Travel 2800 miles with a compass bearing of 180 degrees. 4. Travel 5250 miles with a compass bearing of 90 degrees. 5.

39. More Calc

There is a ditch that is 18 feet deep at its deepest point. A rock is dropped from the rim above the deepest point. a. Write the height of the rock as a function of t in seconds. b. How long will it take for the rock to hit the ditch floor. We want a

40. Math

If line k*+2y-3=0 passes through point (-5,9) then k= Is that k*x+2y-3=0 ? If so, then substitute -5 for x and 9 for y to get -5*k + 2*9 - 3 =0 and solve for k. Nevermind. I am unable to comprehend this on the computer. I will ask someone to do it on paper

41. pentium

hi i need steps on how to dissemble a pentium computer. i was wondering if anyone could give me a specific website because i looked in google but I don't know, I can't find what i want. It has to be pentium and it can't be pentium 2 or three or others.

A example of a nonprogrammed decision for a clothing manufacturer is a. allocating bonuses to employees. b. acquiring a new supplier for cloth. c. deciding to market products using the internet. d. selecting which customers to offer discounts to. Nataly

43. Extraction uses

I'm to describe uses of method. My answer is short. Is it sufficient? Extraction is used to separate one or more components from a mixture. Thanks from Sheryl I think that sounds fine, but I don't know how strict your professor is. :)