Sunday

April 20, 2014

April 20, 2014

Total # Posts: 255

**organic chemistry**

An optical rotation study gives a result of +140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, not -220 degrees.

**psychology**

Can someone help me with these questions, I am having trouble with them. 3. Traumatic events do not always result in a diagnosable psychological disorder. What factors determine how a person may be affected by one such event? 4. What are the four stages in meeting the psycholo...

**organic chemistry**

A sample of 2-butanol has a specific rotation of -9.75 degrees. Determine the % ee (enantiomeric excess) and the molecular composition of this sample. The specific rotation of pure (+)-2-butanol is +13.0 degrees.

**math**

with a cattle act

**english**

how does carbon dioxide affect the ocean?

**organic chemistry**

Determine the percent composition of your unknown mixture. My data for refractive indexes for acetone is 1.365 and water is 1.330. This is what my unknown mixture was composed of. How do I use this info to find percent composition of each compound?

**Psychology**

what are some of the ways that psychologists attempt to explain human behavior?

**chemistry**

This is for organic chem lab. I don't understand how to calculate the relative Rf values by setting ibuprofen to 1.00. For example, my Rf value for aspirin is 0.046, so how do I calculate the Rf relative to ibuprofen (1.00)? My experimental data for ibuprofen is 0.55 if th...

**Statistics**

What is the level of significance?

**Algebra**

Find the slope and y intercept. 3 - 1/2y=2x, 2y+9x+2=11+9x

**Compenstion & Benefits**

what methods do employers actually use to gauge their employees' evaluation of benefit packages?

**english**

Which sentence is correct?why I eat cake, carrots, pizza, and drink soda. I drink soda and eat cake, carrots, and pizza.

**English (Summer Reading Essay)**

Hi! well i was asked to read two books over the summer and answer 4 given questions in essay form but they also said each answer should be about 'one-half page' long...what exactly do they mean? do they mean half a page or a page and a half long? And also; they asked t...

**algebra**

Define a variable and write an inequality. Then solve. A local summer baseball team plays 20 games each season. So far, they have won 9 games and lost 2. How many more games must they win this season to win at least 75% of all their games?

**chemistry**

ANSWER: +.1 M M J

**psychology**

Can some one please help me with these questions I can not find the correct info. 3. Traumatic events do not always result in a diagnosable psychological disorder. What factors determine how a person may be affected by one such event? 4. What are the four stages in meeting th...

**biology**

Compare and contrast the processes of photosynthesis; aerobic respiration; and the two types of fermentation. Give examples of organisms that make use of each of these processes.

**Basic Math**

Which of the given numbers are composite? 0,1,15,19,23,31,49,55,59,87,91,97,103, 105

**english**

WHICH SENTENCE IS MORE CORRECT AND WHY? "Why can't I go with you?" asked Jake. or "Why can't I go with you?" Jake asked.

**history**

During the middle ages what were the roles of the Crusades on the power of the Church, the knights and how they strong-armed their role into power for the church.

**Physics**

thank you so much! I think I just overcomplicated the problem. thank you for making it much easier!

**Physics**

Four penguins are being pulled along very slippery (frictionless) ice by a curator. The masses of the three penguins are given below and so are two of the tensions. Find the penguin mass that is not given. 12kg---Unknown--111N--15kg---20kg--222N After drawing the free-body for...

**Probs & Stats**

a jury of people is chosen from 10 men and 12 women. How many ways can a jury of 6 men and women be chosen?

**Significant Digits**

There is also a way to do this in a graphic calculator... first put your calculator into degree and scientific mode Next type each problem in like this: (2.7,2) x (4.23,2) which will give you your answer. (*when u put the comma in, the calculator will show an E instead)

**Significant Digits**

Welcome

**Significant Digits**

you do 2.7 X 4.23=Y 10^2 X 10^2=10^4 and you get... Y X 10^4

**Math**

thanks

**Math**

A two-digit # whoses cube root is the square root of the sum of its digits

**Mathematics**

yeah, its 9.6

**Science**

I have a science question that I dont quite understand. Would you have to to have physical contact to exert a force? Not necessarily. Could we blow very hard and exert a force on something? When I was a kid I liked to make paper pin wheels and blow on them to see the pin wheel...

**econo**

. John has a paper route and spends all his weekly allowance on hamburgers and pop. The price of a hamburger is $2 and the price of a pop is $1. every week John buys 20 hamburgers and 10 pop. If the price of a hamburger rises to $4 (because of a ban on beef imports) and the pr...

**Math**

A governor would like to find out how people in his state feel about state subsidized public art. How might a cluster sample be selected? I searched Google under the key words "cluster sampling" to get these possible sources: http://en.wikipedia.org/wiki/Cluster_samp...

**AP CHEM**

I would really appreciate some help on this problem. =) At 218 C, Kc = .00012 for the equilibrium NH4HS(s)<==> NH3(g)+ H2S(g) Calculate the equilibrium concentrations of NH3 and H2S if a sample solid NH4HS is placed in a closed vessel and decomposes until equilibrium is ...

**to bobpursley**

An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air becomes poisoned, a worker can use the apparatus to breath while exiting the mine. N...

**chem question i need help**

I need help on this question. Could someone give me tips on how to solve it? thanks An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air ...

**chem**

which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is felt when a warm obj...

**American History:Antebellum Reforms**

What force or ideas motivate and inspire the effort to remake and reform American society during the anti-bellum years? Maybe some help here: http://en.wikipedia.org/wiki/Antebellum

**Chemistry**

Compounds like CCL2F2 are known as chloroflourocarbons, or CFCs. These compounds were once widely used as refrigerants but are now being replaced by compounds that are believed to be less harmful to the environment. The heat of vaporization of CCl2F2 is 289J/g. What mass of th...

**History**

For HW we have to do test corrections on our practice exam, so if any of you know the answers to these I'd appreciate it. =] 1. English Puritanism developed during the reign of Elizabeth I .. A) in reaction to the failure of the Elizabethan Religious Settlement to the impl...

**AP euro help**

For HW we have to do test corrections on our practice exam, so if any of you know the answers to these I'd appreciate it. =] (I’ve eliminated the choice that was marked wrong for each) 1. English Puritanism developed during the reign of Elizabeth I .. A) in reaction t...

**Gases - van der waals**

It turns out that the van der Waals constant b equals four times the total volume actually occupied by the molecules of a mole of gas. Using this figure, calculate the fraction of volume in a container actually ocupied by Ar atoms (a) at STP, (b) at 100 atm pressure and 0 degr...

**american hist**

why did the framers begin the constitution with "we the people..."? http://en.wikipedia.org/wiki/Democracy

**american hist**

-how were the federalists able to win ratification of the constitution? http://en.wikipedia.org/wiki/Federalist_Papers http://en.wikipedia.org/wiki/History_of_the_United_States_Constitution http://www.answers.com/topic/ratification-of-the-constitution

**chemistry**

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals in terms...

**chemistry**

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals in terms...

**orientalism of muslim and arab american**

I can't believe all the student over the years with the same questions from UOP. I am a student there as well. I am having a hard time with this assignment as well. I believe the assignment was created after 9/11 and has never been updated because there is nothing new on t...

**brain teaser help**

what does 50 = L with a W.N. mean?

**algebra anyone**

How to you compute the intercepts of a quadratic function? For the x-intercept, set x to 0. For the y-intercept(s) (if any), set y to 0.

**algebra**

: In case of a quadratic function, why are there two x-intercepts and one y-intercept? Let's say x^2 = y, which is a quadratic function. For every value of y, there are two possibilities for x. For example, if y is 4, x can either be 2 or -2.

**algebra**

Why are there two solutions in the quadratic equation and Why do you factor a quadratic equation before you solve it

**help!!!!!!!!!!**

When factoring a trinomial, why is it necessary to write the trinomials in four terms?" You keep posting this without any thinking. Can this be factored in four terms? 10x^5 + 2x + 17 Perhaps you are meaning factoring the "quadratic" (a polynomial of degree 2) e...

**math**

When factoring a trinomial, why is it necessary to write the trinomials in four terms

**math**

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? Include two examples! I will be happy to critique your thinking on this. I wouldn't ask if I knew how to guess

**MORE MATH**

What is the factoring by grouping? When factoring a trinomial, why is it necessary to write the trinomials in four terms? I will be happy to critique your thinking on this. I do not understand to even answer it? (Broken Link Removed) (Broken Link Removed) How do we determine t...

**math**

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? Include two examples! to get like terms Can you explain a little more? When you factor then you can cancel like terms Example: 12/3 (3)(4) ------- = 4/1 =4 3 i need to ask you a ...