Thursday

November 26, 2015
Total # Posts: 873

**Chemistry**

The specific heat of solid copper is 0.385 J/g*C. What thermal energy change occurs when the temperature of a 40.10g sample of copper is cooled from 42.9C to 10.0C? Be sure to give you answer the proper sign. I know this is part of the answer which (42.9-10.0)*40.10*0.385=508 ...
*February 27, 2012*

**Chemistry**

The specific heat of solid copper is 0.385 J/g*C. What thermal energy change occurs when the temperature of a 40.10g sample of copper is cooled from 42.9C to 10.0C? Be sure to give you answer the proper sign. I know this is part of the answer which (42.9-10.0)*40.10*0.385=508 ...
*February 27, 2012*

**math**

how do you format hours/day-percentage of time spent during an 8 hour work day ?
*February 24, 2012*

**Chemistry**

A compound containing only C, H, and O was extracted from the bark of the sassafras tree. The combustion of 36.3mg produced 98.6 of CO2 and 20.2mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas
*February 19, 2012*

**Chemistry**

A compound containing only C, H, and O was extracted from the bark of the sassafras tree. The combustion of 36.3mg produced 98.6 of CO2 and 20.2mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas
*February 19, 2012*

**pre-calculus**

What is the domain of (x+2)/(x-2)?
*February 15, 2012*

**Philosophy: Introduction to Logic**

1.) (L=N) > C 2.) (L=N) v (P>~E) 3.) ~E > C 4.) ~C /~P
*February 13, 2012*

**statistics**

Assume that the population of heights of female college students is approximately normally distributed with mean m of 66 inches and standard deviation s of 4.00 inches. Show all work. (A) Find the proportion of female college students whose height is greater than 65 inches. (...
*February 12, 2012*

**spanish**

In the following sentences, change the position of the reflexive pronouns so that sentences retain their meaning. Have the correct account punctuation and accentuation. 1. Ellos vienen a despedirse esta noche 2. Daniel se esta afeitando 3. Patricia va a ponrse muy contenta. 4...
*February 8, 2012*

**Chemistry**

Write and balance equation for the complete combustion of decane, C10H22
*February 8, 2012*

**Physics**

A freight train has a mass of 1.7 107 kg. If the locomotive can exert a constant pull of 7.6 105 N, how long does it take to increase the speed of the train from rest to 64 km/h?
*February 1, 2012*

**Chemistry**

Could the answer be fluorine
*January 31, 2012*

**Chemistry**

I have a question I want to make sure I'm going in the right direction. The question states give a diatomic element which is not a gas could the answer be any of the noble gases
*January 31, 2012*

**Chemistry**

I'm looking for the missing information in the table symbol- number of protons-36 number of neutrons-42 number of electrons- mass number-
*January 25, 2012*

**Chemistry**

Fill in the missing information in the following table of four neutral atoms Symbol- 37Cl number of protons- 36 46 number of neutrons- 42 number of electrons- 33 mass number- 77 106
*January 25, 2012*

**Account Recievables**

You notice that your accounts receivable days outstanding has doubled in the first 6 months. Do you give someone a bonus or put him or her on probation? Why?
*January 24, 2012*

**Chemistry**

Give the formula of each of the following copper minerals: A. cuprite, copper (I) oxide B. chalcocite, copper (I) sulfide C. covellite, copper (II) sulfide
*January 23, 2012*

**Chemistry**

heptane and water do not mix, and heptane has a lower density (0.684g/mL) than water (1.00g/mL). A 100mL graduate cylinder with an inside diameter of 3.10 cm contains 39.90g of heptane and 34.00g of water. What is the combined height of the two liquid layers in the cylindar? I...
*January 21, 2012*

**Chemistry**

the answer that I got once I multiply it is 51.3
*January 20, 2012*

**Chemistry**

would you multiply 0.789 x 65.0?
*January 20, 2012*

**calc**

If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3.
*December 28, 2011*

**CALC**

The radius in meters of a circular oil slick increases at a rate of (12 - 0.3t), where t is measured in hours. Which of the following expressions would calculate the rate at which the area of the oil slick is increasing when the radius is 100 meters?
*December 28, 2011*

**CALC**

Find the tangent line to the ellipse defined by 3x^2 + 5y^2 = 17 at the point (-2, 1).
*December 28, 2011*

**Medical Billing**

278.01,
*December 14, 2011*

**chemistry**

Which of the following statements is (are) true about a compound that has a molecular ion peak in its mass spectrum at mass 94, and shows prominent peaks in its IR spectrum at 3600–3200 and 1600 cm–1? A) The compound has a molecular mass of 94. B) The compound ...
*December 11, 2011*

**chemistry**

What type of feature will be observed in the EI mass spectrum of chlorobenzene? An absorption at 3100 cm–1 No signal at all A signal at 112 and a signal at 114 in a ratio of 3:1 A signal at 112 and a signal at 114 in a ratio of 1:1
*December 11, 2011*

**sociology**

Define urbanization and suburbanization. What are some ways that urbanization and suburbanization contribute to social problems?
*December 1, 2011*

**Math**

I need help on this??
*December 1, 2011*

**Math**

What is a3-1=? The 3 post to be on top of the a a little bit
*December 1, 2011*

**Statistics**

1-.02=2.33=z-value plug into the equation [(2.33)^2*.5*.5]/(.02)^2 3393.06
*October 26, 2011*

**MATH(convert fraction)**

so 3/8 is 16 centi on a scale and what is 3/4 on a scale?
*October 18, 2011*

**convert fraction**

so 3/8 is 16 centi on a scale and what is 3/4 on a scale?
*October 18, 2011*

**MATh please help**

Helen has$1.35 in her bank in nickels and dimes. There are 9 more nickels than dimes. Find the number she has of each kind.
*October 18, 2011*

**math help please**

Helen has$1.35 in her bank in nickels and dimes. There are 9 more nickels than dimes. Find the number she has of each kind.
*October 18, 2011*

**MATH (PLease HELp)**

Sally has three times as many dimes as nickels and twice as many quarters as dimes.In all she has $5.55. How many coins of each type does she have? Let 2x=quarters 3x=dimes x=nickles <---- is that correct please help put
*October 18, 2011*

**ALGEBRA-Help please**

x+3y=4 -x -x ALWAYS X means 1 3y=4 divide by 4 y=1
*October 13, 2011*

**MATh**

Distance = rate x time
*October 13, 2011*

**MATh**

Kesha dove from Buffalo to Syracuse at an average rate of 48miles per hour. On the return trip along the same road she was able to travel at an average rate of 60 miles per hour.The trip from Buffalo to Syracuse took one- half hour longer than the return trip. How long did the...
*October 13, 2011*

**MATh (distance)**

Kesha dove from Buffalo to Syracuse at an average rate of 48miles per hour. On the return trip along the same road she was able to travel at an average rate of 60 miles per hour.The trip from Buffalo to Syracuse took one- half hour longer than the return trip. How long did the...
*October 13, 2011*

**Social Studies (civilizations)**

How was the Persian empire was different from the Assyrian Empire?
*October 10, 2011*

**MATh ( translate words into number)**

k thx got it
*October 10, 2011*

**MATh ( translate words into number)**

40. The greater of two numbers is 1 ore than twice the smaller. Three times the greater exceeds 5 times the smaller by 10. Find the numbers. How do i start please explain. WHere do i start and how to do do this. AM very confused.
*October 10, 2011*

**MAth translate please thx **

If 5 times the smaller of two numbers is subtracted from twice the larger the result is 16. If the larger is increased by 3 times the smaller, the result is 63. Find the numbers.
*October 10, 2011*

**Math - translate (please check)**

4. The sum of two numbers is 50. If twice the larger is subtracted from 4 times the smaller the result is 8. Find the numbers is it this x+x(2x-4=8)=50
*October 10, 2011*

**Theme please check **

thanks
*October 9, 2011*

**Theme please check **

the story is A piece of Pie by Damon it was mistake for posting it two times
*October 9, 2011*

**Theme please check **

Could the theme be No women could change men The story is about a man marrying a women and the women wants the man changing his diet. The women bosses him around then the man finds another girl and takes off with her. He took off with her because the women bossed him around ...
*October 9, 2011*

**Social Studies Help!!!!!!!**

how did mercantilism affect different cultures?
*October 6, 2011*

**meaning**

The Thar Desert provide the majority of India's rainfall.. Does this mean that the thar desert prevents rain
*October 6, 2011*

**chemistry**

How many moles of sodium bicarbonate are contained in 1mL of a saturated solution of NaHCO3 (approximately 1g of solute is dissolved per 9mL solution)?
*October 5, 2011*

**English Help!!!!**

Could you tell me about a person who dominated the poor and uneducated.
*October 5, 2011*

**physics**

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 76 km/h to 118 km/h
*September 22, 2011*

**math**

using limits...finding the tangent line of the square root of x when x=2
*September 22, 2011*

**Algebra**

One is traveling 360 mph and the other is traveling 390 mph.
*September 19, 2011*

**chem**

How many gold atoms are in an 0.408 ounce, 18 gold bracelet? (18 gold is 75% gold by mass.)
*September 19, 2011*

**Com/155**

I want to know how it affect your paper
*September 16, 2011*

**3rd grade math**

Ashton broke apart a number into 30+7. What number did she start with?
*September 6, 2011*

**information litercy **

what type of citation would you use for an english paper? 1.ASA 2.Chicago 3.MLA
*August 23, 2011*

**geometry**

Write a two column proof. Given CE = CA, EB and AD are medians, Prove: EB = AD for a triangle
*July 27, 2011*

**Psychology**

Construction
*July 27, 2011*

**science**

Question: If you have an electric motor on a bench and hook it to the power the shaft turns. If you put the shaft in a vise the casing of the motor will turn. Now:...put this motor in free space no gravity and attach a battery for power..when the power is turned on will the ...
*July 25, 2011*

**philosophy**

What is the influence of television commercials on American culture? If you could do something about TV commercials what would you do?
*May 21, 2011*

**Math**

What q equals.
*May 18, 2011*

**Math**

Yes
*May 18, 2011*

**Math**

Simply. 3 + 4(q + 3) + 4q
*May 18, 2011*

**SAT English**

i need some explanations please
*May 16, 2011*

**SAT English**

people who have committed felonies are not permitted to serve on juries in many states.Also, in Tennessee and Arkansas. there are laws barring atheists from serving on juries and other public service positions. Sometimes,felons are denied the right to vote.Are these ...
*May 16, 2011*

**apple**

Do you recognize the company or organization represented by the logo? If you do, where were you first introduced to this logo? Over time, has the graphic changed but still remained recognizable and associated in your mind with the company or organization? What does the graphic...
*May 3, 2011*

**science**

visual means
*May 1, 2011*

**science**

name att least 3 aspects that contribute through visual means. Give examples?
*May 1, 2011*

**seeing is believing**

Describe one experience where you were deceived by what you saw. Describe one experience where you chose not to believe what you had seen.
*May 1, 2011*

**organic chemistry**

Draw structural formula 4-propyl-1-methyl-cyclohexene
*April 29, 2011*

**American history**

After the Spanish-American War, the _______ reserved the right of the United States to intervene in Cuba's internal affairs.
*April 22, 2011*

**english**

When Greg went to a job interview on Monday, they hired him that same day.When Greg went to a job interview on Monday, they hired him that same day.
*April 19, 2011*

**Math**

Solve for x log 1000=x
*April 19, 2011*

**accounting**

I attend penn foster i an working on chapter 1 example number 06168900 and want to know how do i began to do a 3 month accounting period using a fiscal year calendar?
*April 12, 2011*

**algebra 2**

what is the answer to algebra with pizzazz page 100; what should you say if you see a tall, wrought-iron tower in paris, france? there are 24 blanks
*April 12, 2011*

**General Chemistry 2**

The molar heat of vaporization of benzene is 31kj/mol. Calculate the entropy change for the liquid vapor equilibrium. At 1 atm pressure, benzene boils at 80.1 degrees Celsius.
*April 10, 2011*

**chem**

Determination of the solubility product of PbI2. From the experimental data we obtain [I-] directly. To obtain Ksp for PbI2, we must calculate [Pb2+] in each equilibrium system. This is most easily done by constructing an equilibrium table. We first find the initial amount of ...
*April 7, 2011*

**philosophy**

abortion
*April 4, 2011*

**philosophy**

Our text discusses the challenge relativism presents to various ethical and religious viewpoints. Consider a specific moral question which might make it difficult to accept the relativist's response. State the moral issue involved, and provide an explanation as to why you ...
*April 4, 2011*

**philosophy**

State the moral issue involved, and provide an explanation as to why you think a relativist might have problem giving a justified response to it
*April 4, 2011*

**math **

In December the average total rainfall in all of the deserts together is 0.89mm.Explain how to use the figures from the table to write a comparison of the total desert rainfall in August and December.
*March 31, 2011*

**pharmacology 1**

identify the vitamin converted by sunlight on the skin and found in fortified food products
*March 30, 2011*

**Math**

Sue, are you able to help? My son has to go to bed soon and we are anxious to figure out how to do this....appreciate your help!!!
*March 22, 2011*

**Math**

The numbers M and N are different numbers selected from the first 25 counting numbers: If M is larger than N, what is the smallest value that the expression below can have? m * n over m-n?
*March 22, 2011*

**Math**

Can anyone help me solve a Math Olympiad Fraction problem?
*March 22, 2011*

**Honors Chemistry**

A sample of CO2(g) at 305mmHg goes from 13 degress celsius to 25 degress celsius. What is the new pressure?
*March 22, 2011*

**Math**

ok, thanks. I was just thinking I had to use the same number for M & M on the top and bottom of the fraction. I understand now. Thanks so much!
*March 22, 2011*

**Math**

I thought in this problem M and N had to be the same numbers so how could we do 1*2 over 25-1. Also, M has to be larger than N........still confused.
*March 22, 2011*

**Math**

the numbers M and N are different numbers selected from the first 25 counting numbers: If M is larger than N, what is the smallest value that M * N over M-N could have?
*March 22, 2011*

**liberal arts**

3(x – 2) + 4x = -27
*March 2, 2011*

**Physics help! **

An extreme skier, starting from rest, coasts down a mountain that makes an angle of 26.7 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.248. She coasts for a distance of 10.5 m before coming to the edge of a cliff. Without ...
*February 24, 2011*

**Physics 2**

A 0.564-kg basketball is dropped out of a window that is 5.85 m above the ground. The ball is caught by a person whose hands are 1.89 m above the ground. (a) How much work is done on the ball by its weight? What is the gravitational potential energy of the basketball, relative...
*February 24, 2011*

**PHYSICS**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 117-km race in which his average ...
*February 24, 2011*

**Physics! **

One of the new events in the 2002 Winter Olympics was the sport of skeleton (see the photo). Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds - belly down and head first - to slide down the track. The track has fifteen ...
*February 24, 2011*

**Chemistry II**

At a certain temperature, Kc = 33 for the reaction: H2(g) + I2(g) 2HI(g) Assume that the initial concentrations of both H2 and I2 are 6.00 x 10-3 mol/L. Find the concentration of each reactant and product at equilibrium.
*February 22, 2011*

**MATH**

i NEED HELP SOLVING THIS WITH SUBSTITUTION 0.1X + 0.4Y= -2.6
*February 19, 2011*

**Math 209**

Draining the vat. With only the small valve open, all of the liquid can be drained from a large vat in 4 hours. With only the large valve open, all of the liquid can be drained from the same vat in 2 hours. How long would it take to drain the vat with both valves open?
*February 18, 2011*

**Math & Stats**

Please help I was up till 2am trying to figure this out last night, Thanks The top selling Red and Voss is rated 70,000 miles, which means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles...
*February 11, 2011*