Saturday

July 30, 2016
Total # Posts: 1,581

**Chemsitry**

I don’t understand how to write this equation. Write an equation relating the concentration for a reactant A at t=0 to that at t=t for a first-order reaction. Define all the terms, and give their units. Do the same for a second- order reaction. -Would it be the rate law ...
*July 17, 2010*

**Chemistry**

How would you solve this problem? C4H8(g)--> 2C2H4 Determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out 430 C in a constant volume vessel. Time (s) P(C4H8)(mmHg) 0 400 2,000 316 4,...
*July 17, 2010*

**other**

why do u say d??
*July 15, 2010*

**other**

some child psychologists have concluded that___ is the strongest predictor of both scholastic and career achievement A. physical illness b. respect for authority c. emotional well being d inherited intelligence
*July 14, 2010*

**other**

Encouraging children to eat certain foods their families enjoy aroud the holidays is an example of?
*July 13, 2010*

**College Physics**

An airplane flies 200 km due west from city A to city B and then 240 km in the direction of 31.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? (b) Relative to city A, in what direction is city C?
*July 5, 2010*

**chemistry**

A silver ring contains 0.0134 mmol Ag. How many silver atoms does it contain?
*July 2, 2010*

**chemistry**

A silver ring contains 0.0134 mmol Ag. How many silver atoms does it contain?
*July 2, 2010*

**English**

8. We enjoyed some entertaining numbers on the program.
*June 30, 2010*

**Math**

what is .50 times 95000 lbs?
*June 15, 2010*

**chemistry**

Why moles?
*June 13, 2010*

**chemistry**

A chemical problem may be presented to you in units of moles, mass, or volume. Which one of these can be directly used in arithmetic no matter what the conditions are?
*June 13, 2010*

**marketing**

You are working in the product development department of a company that creates household products. Your team has come up with an idea for a revolutionary new cleaning product. Using the seven phases of new product development as a guide, describe how your company will develop...
*June 7, 2010*

**Stats**

A participant in a cognitive psychology study is given 50 words to remember and later asked to recall as many as he can of them. This participant recalls 17. What is the (a) variable, (b) possible values, and (c) score? I just don't understand what it all means. I've ...
*May 28, 2010*

**chemistry**

contrast ionic and molecular substances in terms of the types of attractive forces that govern their behavior
*May 23, 2010*

**English**

I can't send you my homework. What shall I do?
*May 19, 2010*

**Bus. **

P $26 X Q 14 = $ 364 - Cost $238 = $126 , Which is max Profit among those.
*May 18, 2010*

**How Children learn**

what kind of responses do behaviorists look for in their students?
*May 13, 2010*

**Taxes**

3580
*May 13, 2010*

**algebra**

find the LCM of (7 4z), (49-16zsquared), and (7-4z)
*May 13, 2010*

**math**

is the answer 2/25
*May 12, 2010*

**math**

you roll a fair number cube twice. what is the probability of rolling two 3's if the first roll is 5
*May 12, 2010*

**math**

is the answer 1/657800
*May 12, 2010*

**math**

a sock drawer contains 10 white socks, 6 black socks, and 8 blue socks. if 2 socks are chosen at random, what is the probability of getting a pair of white socks?
*May 12, 2010*

**physics**

2m/s
*May 4, 2010*

**physics**

A spherical convex mirror has a radius of curvature of magnitude of 20cm. At what distance from the mirror should an object be placed to obtain an image that is virtual, four times smaller and upright.
*May 3, 2010*

**lal**

how to say FUN in a PLURAL way my sentence is fundraising is the easiest and (fun) way in school
*April 24, 2010*

**math**

Solve for x: (4x + 1)1/2 = 3
*April 24, 2010*

**Math**

$20768 the percentage for this is 21% please help me through the formula on how this is done get 21%
*April 24, 2010*

**math**

how do do you find the percentage of $38676?
*April 24, 2010*

**quote**

what does this mean? " when you judge another you do not define them ,you define yourself."
*April 23, 2010*

**quote**

what does this quote mean? " the surest way to corrupt the youth is to instruct him to hold in higher esteem those who think alike , then those who thinks differently"
*April 23, 2010*

**singular/plural**

is it right!?
*April 23, 2010*

**singular/plural**

sara looked happy going to school, but it was odd because she hated school. maybe it had do with BOY CRUSHES
*April 23, 2010*

**singular/plural**

my entire snetence is this : sara looked happy going to school, but it was odd becuz she hated school. maybe it had to do with boy crushes
*April 23, 2010*

**singular/plural**

i want to say this word in a plural way is this the correct way boy crushes or boys crushes
*April 23, 2010*

**math**

how do you find the area of a square
*April 22, 2010*

**Calculus**

If f(x)= 3 + |x-2|, then f'(2) is A. -1 B. 1 C. 2 D. 3 E. nonexistent
*April 19, 2010*

**math**

Mrs Munoz algebra class was collecting money for a party. The class decided that each student should give the same amount of money. They collected a total of $9.61. If everyone used 5 coins, how many nickels were collected?
*April 19, 2010*

**English**

Can you please tell me which of the two is better? a polka-dotted T-shirt or a polka-dot T-shirt?
*April 12, 2010*

**English**

I just want to know if I can send you my homework.
*April 12, 2010*

**math**

is this correct? 1.a jar contains 5 white, 15 violet,and 21 blue marbles. a marble is drawn at random. P(violet or white) answer: 5x15x21= 1575 15x5=75 75/1575= 1/21 2. a number from 10 to 16 is drawn at random. P(a number greater than 14) answer: 2/7
*April 8, 2010*

**math/probability**

find the number of possible choices when you choose one item from each category. 1. 3 hats, 7 shirts, 13 scarves 2. 6 pens, 2 nbk 3. 4 cars, 2 colors i dont get the question
*April 8, 2010*

**CHEMISTRY**

is it reasonable to expect the heat of neutralization to be the same regardless of which acid is used? or should we expect each acid and base combination to have its own heat of neutralization?
*April 8, 2010*

**Chemistry**

In the neutralization of HCl and NaOH i was instructed to measure the temperature of the acid HCl prior to mixing the reaction components. I was to assume however, that the NaOH solution was at this same temperature. Is this a reasonable assumption?
*April 7, 2010*

**biomechanics**

If a kicker produces a torque of 8Nm with her muscles and the resulting angular acceleration of her leg is 20rad/m2, what is the moment of inertia of her leg?
*April 6, 2010*

**Chemistry**

Well, I know that the reaction is endothermic, because delta Hº is also positive. I just don't understand why delta G is positive, since the reaction seems to be spontaneous...
*April 5, 2010*

**Chemistry**

If delta G for the dissociation of Borax at 30 degrees C (higher than room temperature) is positive, why does it dissolve at room temperature?
*April 5, 2010*

**health**

Help!! I am doing an assignment with 3 scenarios and I have got the first 2 but having trouble with the last. I have read through my chapter and searched webmd and other sites and still can't figure it out. Richard has noted over the past several weeks that he is having ...
*April 5, 2010*

**Math**

The slope intercept is 1/3 and the y intercept is 4xsquaredk. What is the slope intercept form.
*March 30, 2010*

**10th grade**

The slope intercept is 1/3 and the y intercept is 4xsquaredk. What is the slope intercept form.
*March 30, 2010*

**Trig Math**

I need help with this problem. I don't get how to do it or how they got that answer. A force of 50 pounds acts on an object at an angle of 45 degrees. A second force of 75 pounds acts on the object at an angle of -30 degrees. What was the direction and the magnitude of the...
*March 29, 2010*

**Physics**

The smallest object visible to the unaided eye is of 100 microns. If you use a microscope of m=1000, what is the size of the smallest object you can now see? (So=25cm) The answer is apparently 100nm. I am still confused as to why. Please help!
*March 26, 2010*

**world history**

why are farmers today not as tightly bound by geography and climate as they were in the past
*March 26, 2010*

**space**

uummm i want to know how can telescope cxan see so far????
*March 25, 2010*

**inorganic chemistry**

In the final step of making the nitro complex it involves the addtion of concentrated HCl. What are the role(s) of the HCl in this step of the synthesis? nitro complex: [Co(NH3)5(NO2)]Cl2
*March 22, 2010*

**Physics**

A mass spectrometer is used to separate isotopes. If the bean emerges with a speed of 374 km/s and the magnetic field in the mass selector is 1.5 T, what is the distance between the collectors for 235U+1 and 238U+1? The mass of 235U+1 is 235 u and the mass of 238U+1 is 238 u, ...
*March 21, 2010*

**physics**

Two horizontal parallel wires which carry currents I1 = 45 A (top)and I2 (bottom). The top wire is held in position, the bottom wire is prevented from moving sideways but can slide up and down without friction. If the wires have a mass of 9.2 g per metre of length, calculate ...
*March 21, 2010*

**Math**

the weight that a beam can support varies inversly as the length,suppose a 12 foot beam can support 12000 pounds how many pounds can a 15 foot beam support
*March 20, 2010*

**Math**

What is 38 tmes 93 divided by 3 minus 4
*March 14, 2010*

**Physics**

Nevermind I figured it out thanks.
*March 13, 2010*

**Physics**

I am still confused as to which direction the wires will rotate. Using the right hand rule, I found that the magnetic field of both wires will rotate counterclockwise (if you look from above and from the left side).
*March 13, 2010*

**Physics**

Two current carrying wires cross at right angles (like a + sign). Wire 1 has current directed horizontally to the left. Wire 2 has current directed vertically up. If the wires are not restrained, what statement best describes the motion of the wires? A) Wire 1 moves out of the...
*March 13, 2010*

**algebra**

How do you solve the expotential notation equation 120-6^2/4x8?
*March 8, 2010*

**Physics**

We compare a silicon chip to a nerve membrane, with silicon having (about) twice the dielectric constant of the nerve membrane. Which of the following statements is true? A) 1cm^2 silicon chip has a higher capacitance than 1cm^2 nerve membrane. B) 1cm^2 silicon has the same ...
*February 28, 2010*

**PHYSICS**

The frequency of an ambulance siren is 700 Hz. If a pedestrian on the side of the road hears the siren at 756 Hz approximately how fast and in what direction is the ambulance moving? The answer is 90 km/h and towards the person..im not sure how to come to this answer though......
*February 22, 2010*

**chemistry**

This is a lengthy problem, but I really don't understand it. Any assistance given would be greatly appreciated. An analysis was done on a rock sample to determine its rubidium content. The rubidium content of a portion of rock weighing .350g was extracted, and to the ...
*February 15, 2010*

**geometry honors**

precise name of quadrilateral with vertices A(-2,4) B(2,6) C(6,4) D(2,-3)
*February 8, 2010*

**geometry honors**

precise name of quadrilateral with vertices A(-2,4) B(2,6) C(6,4) D(2,-3)
*February 8, 2010*

**pre-calculus**

Verify the following: tan^2 - sin^2 = tan^2 x sin^2 Thanks.
*February 3, 2010*

**Maths**

"How old are your three children?" the maths teachers ask a former student. He is told their ages add to 13, and multiply to give the number on his study door (which they can both see). "i will need to know more", the master days, after a few moments ...
*February 3, 2010*

**Maths**

Andrew arranged the number 1, 2, 3, ...11, 12 into six pairs so that the sum ofany two numbers in a pair is prime and no two of these primes are equal. find the primes and the pairs
*February 3, 2010*

**Maths **

Using each of the 10 digits 0 to 9 just once, is it possible to form positive integers who se sum is exactly 100?
*February 3, 2010*

**math**

that wasn't the right answer. the question asks for "the sum", meaning the minus sign can't be used
*February 3, 2010*

**Physics**

Sorry, Ti = 100/(rs-1), not rs - 100!!!!
*February 3, 2010*

**Physics**

Any ideal gas temperature may be written as T = Ti*r where Ti=temp at ice point and r = lim(P/Pi) at constant V. Show that the fractional error in T is dT/T = dr/r + 3.73 drs/rs where r s = lim(Ps/Pi) at constant V. Ps is pressure at steam and Pi is pressure at ice point. Also...
*February 3, 2010*

**English**

okay I'll try that. Thank you!
*January 30, 2010*

**English**

Thank you! Now I know that he actually does exist. I seem to find little websites like the one you provided for me, and I have to write a 10 page paper on him. Do you have any idea where I could find an abundant amount of information on him?
*January 30, 2010*

**English**

I have to do a report on a poet, John Grey. He is Australian and i cannot seem to find him anywhere on the internet! Is it possible that it may be John Gray? I am very confused and need some help on this assignment! Thank you.
*January 30, 2010*

**reimbursement methodolgies**

You multiply $1500 * 3.0970 to get your answer.
*January 26, 2010*

**chemistry**

Never mind, I figured out how to do the problem.
*January 26, 2010*

**chemistry**

A .4791 g sample was analyzed and found to contain the following masses of elements: carbon, .1929 g hydrogen, .01079 g oxygen, .08566 g chlorine .1898 g Determine the empirical formula of the new compound.
*January 26, 2010*

**Biology202- (Nursing Student)**

Ms. Sue, this is BIO 202 which is taken by future doctors, nurses, and other healthcare workers. All Jessie asked for was some help, not your smart attitude. Thank you.
*January 26, 2010*

**Algebra 2**

a computer manufacturer needs to change the dimensions of its foam packaging for a new model of computer. the width of the original piece is three times the height, and he length is equal to the height squared. The volume of the new piece can be represented by the equation V(h...
*January 24, 2010*

**Chemistry**

A gas containing sulfur and fluorine analyzed as 29 % sulfur. A 140 g sample of a gas occupied a volume of 50.1 L with a pressure of 478.80 torr at 296.00 K. Enter the molecular formula of the compound.
*January 19, 2010*

**Chemistry**

A gas containing sulfur and fluorine analyzed as 29 % sulfur. A 140 g sample of a gas occupied a volume of 50.1 L with a pressure of 478.80 torr at 296.00 K. Enter the molecular formula of the compound.
*January 19, 2010*

**Accounting**

Provide the names of different software programs for each type of saoftware
*January 19, 2010*

**software**

Identify the different types of accounting software
*January 19, 2010*

**Law & Ethics**

describe the effect and the procedure for obtaining access to your medical records under Hipaa
*January 12, 2010*

**Chemistry**

If a sample of Helium gas is collected over water, what is the pressure of the dry gas alone if the total pressure is 760.0 mmHg and the partial pressure of water is 20.0 mmHg?
*January 10, 2010*

**Algebra Pizzaz**

Allegro is French for fast
*January 7, 2010*

**Health**

Who first discoverered SIDS and when? i have looked everywhere for this and still cannot find it!
*January 5, 2010*

**Maths**

i looked at the site, now i'm really confused, could you just show me the answer and working out, we haven't done the foil method in school we do it differently.
*January 1, 2010*

**Maths**

Please can you expand and simplify the following: (2x-5)(x+3) Many thanks. Happy New Year
*January 1, 2010*

**Pre Cal**

What is the value of: sin^-1 0.6349, sec^-1 0.5496, tan^-1 0.3457
*December 23, 2009*

**science/physics**

Then, don't forget to multiply the velocity by the mass to find the momentum.
*December 10, 2009*

**Chemistry**

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more heat. This would ...
*November 30, 2009*

**AP Chemistry**

thanks :] its a weird question, I must add :-/
*November 30, 2009*

**AP Chemistry**

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more heat. This would ...
*November 30, 2009*

**AP Chemistry**

But what if we weighed the metal before?
*November 30, 2009*