Wednesday

November 26, 2014

November 26, 2014

Total # Posts: 2,359

**Chemistry**

If a solution of sodium phosphate, Na3PO4, is poured into seawater, precipitates of calcium phosphate and magnesium phosphate are formed. (Magnesium and calcium ions are among the principle ions found in seawater.) Write net ionic reactions for the reactions. Include physical ...
*June 27, 2011*

**Chemistry**

Write equations for the dissociation of the following in water. Include physical states for all species. CaCl2 (NH4)2SO4 NaC2H3O2
*June 27, 2011*

**Math**

This is hard to explain... I need to spend between $20,000 and $60,000, BUT I need to spend ALL amounts, like $1, then 2, then 3, then 4 How do I figure out how much I will spend when I'm finished?
*June 24, 2011*

**Literature**

Which one of the following lines best illustrates personification? A. The fog comes on little cat feet B. She floated graceful as a dove C. Spring is a dream unsung D. A narrow wind complains all day
*June 14, 2011*

**global history**

It's definitely C
*May 31, 2011*

**Chemistry**

Now I get it, thank you so much!
*May 25, 2011*

**Chemistry**

how do you calculate the quantity of heat gained or lost? 0.60 mol of steam condenses at 100°C
*May 25, 2011*

**Chemistry**

how do you calculate the quantity of heat gained or lost?
*May 25, 2011*

**Chemistry**

0.60 mol of steam condenses at 100°C
*May 25, 2011*

**Chemistry**

The specific heat of toluene, C7H8, is 1.13 J/g K. How many joules of heat are needed to raise the temperature of 30.0 g of toluene from 10.4°C to 29°C? THANK YOU
*May 25, 2011*

**math**

The inequality for the graph can be expressed as 32 ≤ r ≤ m where r is the minimum range of the scores in any of the games and m is the maximum range. What is the value of m?
*May 24, 2011*

**Chemistry**

What is the hydrogen ion concentration in a 0.15 molar solution of acetic acid in water at 25 degrees C? Acetic acid is 1.3 % dissociated.
*May 23, 2011*

**Pre-Calc**

Can you someone please help me with this question??? Simplify cot(x + pi)
*May 22, 2011*

**Physics**

Sorry y1=3cos[2pie*t/T + pie] and y2=1cos[2pie*t/T + 2pie]
*May 18, 2011*

**Physics**

Two displacement waves are added resulting in constructive interfernce and these waves have the same period T = 1.00 s are described mathematically by: y1 = (3.0 m) cos[ 2ðt/T + ð ] y2 = (1.00 m) cos[ 2ðt/T + 2ð ] (i) What is the resultant displacement at time ...
*May 18, 2011*

**Spanish-Please check**

Thank you
*May 15, 2011*

**Spanish-Sorry I forgot the 'La"Please check**

I coem from the library. Yo vengo de la biblioteca. I forgot the "la"
*May 15, 2011*

**Spanish-Please check**

Please check-Thank you I come from the library. Yo vengo de biblioteca.
*May 15, 2011*

**Psychology**

Explain how you would use your knowledge of the overjustification effect so college graduates would engage in lifelong learning or avoid job burnout on loved but low-paying careers. I know what the overjustification effect is (an external incentive like a reward, decreases a ...
*May 15, 2011*

**health**

Does this help? (from sahealthinfo) Effects of acute alcohol intoxications in South Africa * Alcohol misuse is causally implicated in a range of chronic health problems (e.g. cirrhosis of the liver). However, many of the primary effects of alcohol misuse occur from episodes ...
*May 15, 2011*

**Spanish 8th gradePlease check**

Thank you
*May 15, 2011*

**Spanish 8th gradePlease check**

Please check these for me 1.I have to clean the house. Yo tengo que limpiar la casa. 2.I am going to the library Yo voy a la biblioteca. 3.I have to clean the house. Yo tengo que limpiar la casa. 4.I hope to get good grades Yo espero que sacar buenas notas.
*May 15, 2011*

**Biology**

thanks
*May 13, 2011*

**Biology**

Name two ways in which antibodies in the blood will prevent a pathogen from making you sick. This is all I can think of: 1. An antigen in the body will bind to an antibody that was made by...
*May 13, 2011*

**probability and statistics I NEED HELP**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011*

**probability and statistics**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011*

**Physics**

What will be the final temperature if 1.9 x 10^2 kJ of heat is added to 0.5 kg of ice at 0 deg. C?
*May 10, 2011*

**6th grade English**

Need to pick out the subject, verb and adjective 1. I like French Dressing. Subject=I verb=like adj=french 2. Where are my old jeans? subject=jeans verb=are adj=old
*May 5, 2011*

**chem**

C6H6O6-2
*May 5, 2011*

**Engish**

Need to circle the correctword in parentheses and label adjective or adverb. 1. Cats can see (good,well) in the dark. ANSWER=well,adverb 2.After the storm the pier was damaged(bad,badly). ANSWER=bad,adjective 3. I was (real,really) pleased to get your invitation. ANSWER=really...
*May 3, 2011*

**Chemistry**

Determine the number of moles in 56 g of N2
*May 3, 2011*

**Chemistry**

How many moles of SiO2 will contain 48 g of oxygen?
*May 1, 2011*

**algebra**

If 1/8 = 12 1/2% what percent does 3/8 equal?
*April 27, 2011*

**identities trig?**

find all solutions to the equation in the interval [0,2pie] cos2x=cosx
*April 26, 2011*

**math**

yes two negatives is a positive and no matter what when you put a negative and a positive together when MULTIPLYING it will always be a negative
*April 26, 2011*

**math**

How do you write twenty million, five hundred thousand in expanded notation using exponents.
*April 25, 2011*

**Physics - Please Help**

Thank You so much Bob Pursley!!
*April 25, 2011*

**Physics - Please Help**

A 60 year old person has a threshold of hearing of 81.0 dB for a sound with frequency f=10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young adult, (sound level=43.0 dB) be increased so that it is heard by the older person...
*April 25, 2011*

**Psychology**

Thanks :)
*April 24, 2011*

**Psychology**

Can anyone think of another example of a Personological variable other than just personality? I'm looking at the General Aggression Model (the long term one) and it says an increase in agressive personality leads to Personological variables (e.g. aggressive personality) I...
*April 24, 2011*

**Physics (please help!!!!)**

This might help: w w w . khanacademy . o r g / # physics I LOVE this site.
*April 24, 2011*

**Psychology**

I'm doing a presentation on Friday and I want to explain the General Aggression Model in more detail. I can't think of a way to explain "Aggressive perceptual schemata", "Aggressive expectation schemata", and "Aggressive behavior scripts" ...
*April 23, 2011*

**Biology**

I'm having trouble answering this: The average size of a large fish that humans use for food has been decreasing over time, Exp-lain how, exactly, this happens - be sure to discuss genes, proteins, traits, and selection pressure. This is all I can answer :( The large fish ...
*April 21, 2011*

**grammar**

I am diagraming sentences... what would a year be? He lived in the white house until 1945? HELP! I got everything else... Thanks.
*April 20, 2011*

**math**

is 17 14 and 6 measurements of a right triangle?
*April 19, 2011*

**Math**

If the area of a square is 36 sq. Ft., explain how you could find the perimeter.
*April 18, 2011*

**maths**

a worker dig a ditch with perpendicular sides.It is 1.05m wide at the top and at the bottom. If it is 1.80m deep and 21.6m long.How many cubic metres of earth are removed?[give your answer to 1 decimal place.]
*April 18, 2011*

**Government**

Why have the president's foreign policy powers grown despite the fact that there have been no constitutional changes since the founding? I've tried and searched various terms on Google and all I'm getting is the "crisis atmosphere of the Cold War" and the...
*April 12, 2011*

**Math**

In parallelogram DEFG m<E= 70. What is the measure of < F
*April 12, 2011*

**Math 7th**

two more than my value is 6 what does this mean??????? Please help!!!!!!!!!!!!
*April 10, 2011*

**Physics**

Does a bathroom scale measure mass or weight? If if measures mass, then how come it changes when you are on the moon?
*April 10, 2011*

**Math**

The product of two numbers is 108, and the quotient is 12. What are the two numbers.
*April 7, 2011*

**social studies**

What are a few early motions towards the abolition of slavery
*April 7, 2011*

**English**

1. Correct 2. taught 3. laid 4. laid 5. correct 6. set 7. correct 8. raised 9. correct 10. set
*April 5, 2011*

**English**

Need to correct the verb if not correct and if correct just leave. Thanks for looking at this for me... 1. King Arthur LEARNED about the magic sword from Merlin the magician. ANSWER=correct 2. My older sister LEARNED me to read when I was in kindergarten. ANSWER=taught 3. ...
*April 5, 2011*

**Math**

it could be 12 or 24
*April 4, 2011*

**Math**

what is the goal? to simplify? if so it would be: 12z^4-4z^3+21z-7 z^2 means z squared, z^3 z cubed, etc. i assumed that the 4z3 at the beginning was four z cubed...
*April 4, 2011*

**geometry**

The area of a parallelogram MNOP is 48 sq cm. MX, which is a line segment perpendicular to diagonal PN where X is on PN, is 3 cm. How to find the length of diagonal NP?
*April 4, 2011*

**geometry**

in a rhombus, the diagonals are perpendicular , so if you divide each diagonal in half (where they intersect) than you get a right triangle with sides 3 4 and x. Use pythagorean theorum and that side is 5. Because all sides of a rhombus are congruent, each side is 5, so the ...
*April 4, 2011*

**math**

y(output)=5/2x + 2
*April 4, 2011*

**Physics**

How come we don't use the cosine law? In an example, they used the cosine law to find Fnet: A person of mass 70 kg is sitting on a 20 kg toboggan. If the two people are pulling her with two different ropes, find the person's acceleration. The force of person 1 is 50 N...
*April 3, 2011*

**Physics**

Two tugboats are pulling a freighter. Find the net force and direction of the acceleration for the following cases. Assume that each tugboat pulls with a force of 1.2 x 10^5 N. Assume no resistive force at this time. a) Tugboat 1 pulls in a direction given by [N 60 degrees E] ...
*April 3, 2011*

**Chemistry**

What are the products of KOH + SO2?
*April 2, 2011*

**Math**

Each number in this sepuence is -2 times the number before. write the missing numbers: -1, 2, -4, ....., ....., 32
*April 2, 2011*

**Science**

Suppose all of the apples have a mass of 0.10 kg and one of the apples in the bowl (C) is 1.0 meter off the ground. If the apple (C) falls from the table, what is the maximum kinetic energy it can gain?
*April 1, 2011*

**chemistry**

How many moles of Na2CO3 would be needed to react with 750 mL of 0.250 M H2SO4 solution?
*April 1, 2011*

**English**

Need to write whether the verb in Transitive or Intransive. 1. John received a silver trophy. A=trans 2. The judge gave him a check for $100. A=trans 3. The contestants all played well. Answer=intrans 4. Thomas won a silver plate in a different competion. Answer=trans 5. Kim ...
*March 29, 2011*

**Chemistry **

if i place C6H14 and KI in a test tube, then some metal salt (MNO3) is added... If the M+ reacts with and oxidizes the I, What color is c6h14? I think its purple.. but im not sure why it would be that color .. :S .. care to explain please ? and if it doesnt react .. what color...
*March 29, 2011*

**Physics**

A boy in a car moving at 10 km/h [N] wants to throw a ball to a girl standing on the right-hand side of the road. He is able to throw the ball at 20 km/h. He wants the ball to go straight east, directly to her. a) Relative to the car which way should he throw in order to do ...
*March 24, 2011*

**Math**

Well, for the first I was trying to use V(t)=g(t)+v(0), but I can't figure out of v(t) would be zero because it hit the ground or if I need to figure it out some other way. The second one I think is probably the same as figuring out what velocity it is when you drop it ...
*March 24, 2011*

**Math**

I have a few basic physics problems. How do you calculate how long it will take for an object to hit the ground when it is dropped from a certain height? Specifically from 128 ft. Additionally how would you calculate how much velocity is needed to launch at item to a certain ...
*March 24, 2011*

**English**

I am the WORST writer. English is my weakness. I just wrote this literary analysis. I would go to the writing center at my school, but the paper is due tomorrow and it doesn't open until after my class. I would appreciate it SO much is someone could just quickly scan this ...
*March 24, 2011*

**English **

Is #3 learned
*March 23, 2011*

**English **

Have a question on Simple Verb Tenses. Need to reswrite each sentence, using the correct form of the verb in parentheses with s,ed,or will.. Thank for looking and helping me~~ 1. Long ago Plutarch___ stories of Greeks and Romans. (RELATE) Answer=related 2. Today we___a person...
*March 23, 2011*

**Science**

Didn't help
*March 23, 2011*

**Science**

How do you separate a mixture of salt,pepper, and iron filings
*March 23, 2011*

**Chemistry**

I'm not quite sure what i'm doing wrong here: The Ksp for Ga(OH)3 = 7.28 X 10-36. What is the molar solubility of Ga(OH)3 in a 3.80M solution of gallium sulfate?
*March 22, 2011*

**chemistry**

If I use 0.524g of Mg to react with 60.0mL of 1.0M H+. The density of H+ is 1.00 g/mL, and the specific heat capacity equals what water's is. The Final and Initial temp. are 65.8 and 22. Mg(s) + 2H+(aq) ----> Mg2+(aq) + H2(g) so to find the deltaH of this reaction .. i ...
*March 22, 2011*

**Literature**

Is the old man in "A Very Old Man with Enormous Wings" a flat or a round character? I can't decide. He has some traits but I don't know if they justify a round character.
*March 21, 2011*

**math**

what is the value of the digit in the tens place 805
*March 21, 2011*

**math**

the foyer was 8 feet by 8 feet, but the tiles were 4 square feet. how many tiles will they need to fill the space?
*March 21, 2011*

**History Question**

That's really your own opinion. What I would do is research some important amendments. I like the 1st - freedom of speech.
*March 20, 2011*

**English**

Another quick question... "A Very Old Man with Enormous Wings" seems to be told in a third-person omniscient narrative, because we know the thoughts and feelings of all of the characters, with the EXCEPTION of the old man...is this still considered omniscient or is ...
*March 20, 2011*

**English**

I'll do that. Thanks! :)
*March 20, 2011*

**English**

I'm having trouble writing an introduction to this literary analysis. It's for "A Very Old Man with Enormous Wings". I'm supposed to show how the elements point of view, character, setting, tone and style, and symbolism convey the authors themes or ...
*March 20, 2011*

**chemistry**

Barium sulfate is listed as insoluble on solubility tables. It does, however, dissolve to a small extent. Its solubility at 50 'C is 0.00034g in 100. g of water. Express this solubility in parts per million -I know the equation is ppm= (grams of solute/L of solution) x 10^6
*March 20, 2011*

**chemistry**

Fe3+ is added to excess Ag+ prior to titration with KSCN. When all the excess Ag+ has reacted, the red complex of Fe(SCN)2+ forms. This red complex is visible when the [SCN-] is about 2x10^-4M. at this pt. >99% (but not all) of the Ag+ has precipitated. Calc. the Ag+ when ...
*March 15, 2011*

**chemistry**

You add thiocynanate ions to a solution The molarity of silver ion is 0.1M initially. Calculate the max concentration of SCN- ion that exists in the solution before AgSCN beings to precipitate? ?
*March 15, 2011*

**Chemistry**

Are binary compounds ionic or covalent? If they are covalent, I thought they don't form bonds that way, since they share electrons.
*March 15, 2011*

**Chemistry**

Are binary compounds ionic or covalent? If they are covalent? If they are covalent, I thought they don't form bonds that way, since they share electrons.
*March 15, 2011*

**physics**

A tire placed on a balancing machine in a service station starts from rest and turns through 10.8 revolutions in 8.48 s before reaching its final angular speed. Calculate its angular acceleration.
*March 14, 2011*

**chemistry**

addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl
*March 13, 2011*

**Physics**

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the center-of-mass coordinate...
*March 10, 2011*

**Physics**

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the center-of-mass coordinate...
*March 10, 2011*

**Chemistry**

Thanks! So do all polyatomic ions have a coordinate bond?
*March 9, 2011*

**Chemistry**

How do you know when to use a coordinate bond with molecular compounds?
*March 9, 2011*

**math**

Determine whether the graph of each function is symmetric with respect to the origin. F(X)=-12/x
*March 9, 2011*

**physics**

A book weighing 29 N is placed on a table. if the support force back on the book from the table is 29 N, what is the net force?
*March 8, 2011*

**Chemistry**

Please help me understand!..If you have 100.0mL of a 30.0% aqueous solution of ethanol, what volume of water is in the solution?
*March 8, 2011*

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