Thursday

August 28, 2014

August 28, 2014

Total # Posts: 460

**Chemistry**

Thank you but i'm not understanding how you got .002 for x
*August 3, 2014*

**Chemistry **

A chemist wants to prepare phosgene, COCl2, by the following reaction: CO(g) + Cl2(g) COCl2(g) He places 2.60 g of chlorine, Cl2, and an equal molar amount of carbon monoxide, CO, into a 10.00 L reaction vessel at 395 °C. After the reaction comes to equilibrium, he adds ...
*August 3, 2014*

**chemistry**

a) Calculate the percent ionization of 0.125M lactic acid (Ka=1.4x10^-4) b) Calculate the percent ionization of 0.125M lactic acid in a solution containing 0.00075 M sodium lactate.
*July 31, 2014*

**Statistics**

In hypothesis testing, as the a level gets smaller, the level of confidence increases. True or False? And why or why not?
*July 30, 2014*

**Statistics**

Express the confidence interval (0.033,0.099) in the form of P-E<p<P+E
*July 27, 2014*

**Statistics**

Express the confidence interval (0.033,0.099) in the form of P-E<p<P+E
*July 27, 2014*

**Writing**

Was it b? Did you get it right?
*May 21, 2014*

**Math 221**

Thank You Steve I will note that thanks again !
*April 17, 2014*

**Math 221**

y-y1 =m(x-x1) y=5=-3x-*(x-1) y-5=-3x-3 y-5+3=-2+1= y=-3 I don't know if this is correct
*April 17, 2014*

**Math 221**

the equation of a line parallel to the given line but passing through the given point. I can't figure out. y=-3x-6;(-1, 5)
*April 17, 2014*

**chemistry**

a wet gas collected over water has a volume of 900 mL at50 degrees Celsius and a pressure of 84.6 kPa. The partial pressure of water at this temperature is 12.3 kPa. What is the volume of the dry gas at 120 kPa?
*April 6, 2014*

**ADVANCED WORD PROCESSING**

Sally will clear and set tabs in the Tabs dialog box. Desi will set and clear tabs on the Horizontal Ruler. Who is correctly setting and clearing tabs?
*April 4, 2014*

**Math**

What is the perimeter of a regular hexagon with sides measuring 3 1/2 feet
*April 1, 2014*

**Math **

A builder replaces the original 3 1/4 foot counter tops with one that are 2 1/2 feet high. What percent of the original height is the height of the replacement counter tops? Round your answer to the nearest whole percent
*March 31, 2014*

**Math help**

What is 27% of 90. estimate How do you solve
*March 31, 2014*

**MATH HELP!!**

3c-7d=-3 2c+6d=-34
*March 23, 2014*

**Chemistry [back-titration] - please check my sol'n**

I get it now. I didn't think about the reaction of Fe^2 and Cr2O7^2-. I thought they would produce FeCr2O7, so I thought they're in 1:1 ratio. Yes, I got 159.6 g/mol as weight of TeO2 (as what I've typed above). :) Yes, I've seen the post about the nuclear chem...
*March 19, 2014*

**Chemistry [back-titration] - please check my sol'n**

A 7.00 gram sample containing the mineral tellurite was dissolved then treated with 70.0 mL of 0.03114 M K2CrO7. 3 TeO2 + Cr2O7 ^2- + 8 H+ -> 3 H2TeO4 + 2 Cr3+ + H2O When reaction is complete, the excess Cr2O7 2- required a 14.05 mL back titration with 0.1135 M Fe2+. ...
*March 19, 2014*

**Economics**

Which of the following is not a factor of production? A. Capital B. Goods and Services C. Labor D. Land
*March 19, 2014*

**American Goverment**

I think it's C
*March 18, 2014*

**American Goverment**

Which is an important function of county government? A. taxing imports B. overseeing tribal governments C. running elections D. hosting foreign leaders
*March 18, 2014*

**Math**

George says that if you subtract 185 degrees from an angle that measures 360 degrees, the new angle is an obtuse angle. Is this true
*March 16, 2014*

**To Nina**

Oh my, thank you so much for your help...! :)
*March 16, 2014*

**Chemistry (titrations)**

Thank you! I understand it now. :)
*March 15, 2014*

**Chemistry (titrations)**

15.00 mL of 0.01200 M EDTA were used to titrate 50 mL aliquot solution containing iron (II). How much iron (II) is present in the solution? The answer in the book is 201 ppm. I tried getting the moles of EDTA (n,EDTA = 1.8 x 10^-4 mol). I think they're in 1:1 ratio, or I ...
*March 15, 2014*

**Chemistry**

Calculate the amount of energy released per gram of nuclei when 2 protium nuclei react to form deuterium nucleus (protium = 1.00782 amu, deuterium = 2.01410 amu). The answer in the book is -2.0 x 10^10 J, but I don't have any idea on how to do this. Please help, and thank ...
*March 15, 2014*

**Personal Finance**

The maximum tax rate on estates and gifts: A. is gradually declining. B. is gradually increasing. D. has increased sharply
*March 10, 2014*

**Math Analysis 2 **

assume that x=x(t) and y=y(t). Let y= (x^3)+4 and dx/dt=5 when x=2. dy/dt when x=2
*March 3, 2014*

**math**

Find the GCF and LCM of 15 and 50
*February 16, 2014*

**LANGUAGE ARTS UGRENT!!! (Check Answers)**

How about now Ms. Sue? 2: A 3: D
*February 12, 2014*

**LANGUAGE ARTS UGRENT!!! (Check Answers)**

Both are wrong?
*February 12, 2014*

**LANGUAGE ARTS UGRENT!!! (Check Answers)**

Oh okay. Are they right now? 2: The person that would buy the coat. 3: Anne has come to consider Mrs. Van Daan a member of her family because of the kindness she has shown.
*February 12, 2014*

**LANGUAGE ARTS UGRENT!!! (Check Answers)**

1. I was disgruntled by what you said, but I didn’t want to show my (1 point) happiness. **anger. jealousy. 2. When Peter tells everyone that Mr. Van Daan is going to sell Mrs. Van Daan’s coat, a stage direction reveals that Peter’s sympathy is with (1 point) ...
*February 12, 2014*

**Physics - please help me..**

A 1.35 kg mass is suspended from a spring with a spring constant of 189.0 N/m. The spring is attached to a rod which oscillates vertically at a frequency f. For what value of the frequency f will the system resonate?
*February 12, 2014*

**Damon**

I know that w=squ(k/m) and T=(2*pai)/w but its wrong and I dont know what to do.. can you help me?
*February 12, 2014*

**please help me.. physics**

A 1.30 kg mass is suspended from a spring, with a spring constant of 135.0 N/m. Find the driving frequency which would cause resonance.
*February 12, 2014*

**math **

Put into order from least to greatest 3/4, .85, 5/7, .62 My answer 3/4, 5/7, .62, .85
*February 11, 2014*

**math **

Put into order from least to greatest 3/4, .85, 5/7, .62 My answer 3/4, 5/7, .62, .85
*February 10, 2014*

**PHI103 WEEK 3**

This is the name for the reasons that one presents to support a conclusion. (Points : 1) Proposals Premises Deductions Inductions None of the above
*February 8, 2014*

**Physics**

A 3.00 gram lead bullet travels at a speed of 240 m/s and hits a wooden post. If half the heat energy generated remain with the bullet, what is the increase in temperature of the embedded bullet? (clead = 128 J/kg C)
*February 5, 2014*

**Earth Science**

Thx Richard and Ms. Sue i think i might get this.
*January 9, 2014*

**Earth Science**

The Rocky Mountains are more jagged than the Appalachian Mountains. This suggests that • erosion has worn down the Appalachian Mountains more than the Rocky Mountains. • the Rocky Mountains are older. • the Appalachian Mountains are more likely to experience ...
*January 9, 2014*

**trig**

Two Airplanes leave an airport at the same time on different runways. One flies on a bearing of N66degreesW at 325 miles per hour. The other airplane flies on a bearing öf S26degreesW at 300 miles per hour. How far apart will the airplanes be after 2 hours?
*January 6, 2014*

**trigonometry**

From a point 150 ft from the base of a building the top and the base of a flagpole on a roof edge have angles of elevation of 27degrees49' and 21degrees42' respectively. Find the height of the pole.
*January 6, 2014*

**trigonometry**

A ship is sighted directly east of a lighthouse. Another ship, which is 20m away from the first ship, is observed at a bearing of N25degreesE from the lighthouse. If the first ship is 4.1 km away from the lighthouse, what is the distance of the second ship from the lighthouse?
*January 6, 2014*

**Math**

The length of a football pitch is 100m and the width of the pitch is 80 m calculate the length of a diagonal of the pitch give your answer to the nearest metre
*January 1, 2014*

**Math**

A plane flies due east for 120 km from airport a to airport b it then flies due north for 280 km to airport c finally it flies directly back to airport a calculate the direct distance from airport to airport a give your answer to the nearest kilometre
*January 1, 2014*

**English (grammar)**

Hi. I just want to ask if the statement below is grammatically correct: " I'll keep up what I can do for other people. " I think the thought of the statement can be understood, but I'm not sure if the grammar is correct (or the words are like jumbled). Help ...
*January 1, 2014*

**PHI 103**

If P is true, and Q is false, the truth-value of "P v Q" is (Points : 1) false. true. Cannot be determined All of the above
*December 17, 2013*

**Math**

emma has a small garden. Emma's garden is 1/5beans 1/8 piece & 1/2 corn. the rest is planted with flowers. what fraction of Emma's garden is planted with vegetables
*December 17, 2013*

**Math**

emma has a small garden. Emma's garden is 1/5beans 1/8 piece & 1/2 corn. the rest is planted with flowers. what fraction of Emma's garden is planted with vegetables
*December 16, 2013*

**PLEASE HELP!!!!**

((cotx+cscx)/(sinx+tanx))=cotxcscx Please prove left side equal to right side, only doing doing work on the left.
*December 16, 2013*

**Math**

emma has a small garden. Emma's garden is 1/5beans 1/8 piece & 1/2 corn. the rest is planted with flowers. what fraction of Emma's garden is planted with vegetables
*December 16, 2013*

**math**

thank you :)
*December 12, 2013*

**math**

What integer would represent "twenty-two hundred feet above sea level"?
*December 12, 2013*

**PHI 103**

If an argument does not commit a fallacy, it is A.necessarily valid. B.necessarily sound. C.Not enough information to determine D.Both A and B
*December 8, 2013*

**PHI 103**

A person who is shown his or her argument commits a fallacy should A. run screaming from the room. B. argue louder. C. add another fallacy. D. revise the argument.
*December 8, 2013*

**English (grammar)**

Thank you very much for your help. :)
*November 29, 2013*

**English (grammar)**

Thank you for your reply. :) By the way, how about if it's in the past (contributes -> contributed)? Can the phrase still be 'to your becoming'?
*November 29, 2013*

**English (grammar)**

Is this statement correct? "Helping other people contributes to your being a great leader." I'm not really sure with the phrase 'to your being'. It sounds incorrect but I'm not really sure. If it's incorrect, how do I rephrase the sentence?
*November 29, 2013*

**PreCal**

Logarithm of a negative number is imaginary. If you try plotting y = log x, you'll see that the x values are all positive and infinitely approaches zero.
*November 29, 2013*

**math check**

what unit of measure would you use to describe the distance from your house to school? D. Meters a.grams b. kilometers c. liters d. meters
*November 17, 2013*

**ELA? Check answers!!**

1. Which of the following places would need to be sterile? A: park B: classroom C: A hospital operating room 2.Which of the following example of a question you might ask yourself to monitor comprehension? A: How can thrid-degree burns be treated at home? B: How is a third-...
*November 13, 2013*

**Math Help! Someone please help?:)**

1. The sides of a square are increased by a scale of 6. The perimeter of the small square is 10ft. What is the perimeter of the larger sqaure? 2.5 ft, 10 ft, 60 ft, 120 ft 2. A map of Utah has a scale of 1 cm:30 mi. The boarder of Utah and Wyoming measures about 3.7 cm. How ...
*November 5, 2013*

**Math help**

Solve this equation and check answer Fraction→n/56=8
*October 27, 2013*

**Math help**

Solve this equation and check answer Fraction→n/56=8
*October 24, 2013*

**Physics**

A 5 kg ball rolls down a 10meter long slope. Ignoring friction, how fast will the ball be rolling when it reaches the bottom?
*October 21, 2013*

**biology**

How does mitosis in plant cells differ from that in animal cells? A. Animal cells lack a cell plate. B. Plant cells lack centrioles. C. Plant cells lack spindle fibers. D. Animal cells lack cytokinesis. I chose b but I got it wrong please help....
*September 30, 2013*

**AP Calculus**

Consider the function f(x)= abs(x)(x-3)/9-x^2 a) what is the domain of f? What are the zeros of f? b) find all nonremovable discontinuities of f c) determine all vertical and horizontal asymptotes of f
*September 16, 2013*

**Math **

9 7/8 + 2 7/8 I get 11 14/8 Is that right
*September 12, 2013*

**history**

Write me a paragraph describing all the components of the English Bill of Rights that seem familiar or you know are the law in America.
*September 3, 2013*

**Algebra 2 **

Jessica's bank contains 18 quarters and dimes, of which q are quarters. Find the total value of the coins in dollars.
*September 2, 2013*

**Algebra 2**

Jessica's bank contains 18 quarters and dimes, of which q are quarters. Find the total value of the coins in dollars.
*September 2, 2013*

**Algebra 2**

Is this right?? (x)(x-2)(x-4)
*September 2, 2013*

**Algebra 2 **

A pyramid has a rectangular base. Find the volume if the length and the width of the bad and the hight are three convective odd integers and x is the largest integer.
*September 2, 2013*

**Acc Algebra 2 **

1. Name the property that Justifies each step in the simplification below. 1/2[(x+2)+(-x)]=1/2[-x+(x+2)] a.__?__ =1 /2[(-x=x)+2)] b.__?__ = 1/2(0+2) c.__?__ = 1/2*2 d.__?__ =1 e.__?__ My answers a. Communitive Property b.Assotiative Property c. equavelent expression d. ...
*August 28, 2013*

**chemistry**

find the ph of the resulting solution 10 ml of 0.06 mol/l is mixed with 20 ml of 0.02 mol.l Ca(OH)2
*June 27, 2013*

**Math**

erica painted a picture of her dog the picture has an area of 3,600 cm2 and is a square. she has placed the picture in a frame that is 5 cm wide. what is the perimeter of the picture frame?
*June 3, 2013*

**Math**

erica painted a picture of her dog the picture has an area of 3,600 cm2 and is a square. she has placed the picture in a frame that is 5 cm wide. what is the perimeter of the picture frame?
*June 3, 2013*

**English 09**

I need to create different nicknames for each character in Romeo and Juliet. Please Help. The nicknames should describe the character Juliet- Tybalt- Prince of Cats Rome- Lady Capulet- Lord Capulet- Lord Montague- Lady Montague- Nurse- Friar Lawrence- Paris- Prince Escalus- ...
*May 26, 2013*

**Geometry**

What is the measure of m<JIH ? FE = 7.5 cm IJ = 7.5 cm m < FGE = 28 degrees A. 124° B. 56° C. 28° D. 62°
*May 24, 2013*

**Chem**

In a preweighed flask a sample of5.8 gm was combined with water,mass of solid and water after subtracting flask weight is24.6gm,density of water is 0.997g/ml,what is density of solid.
*May 1, 2013*

**English **

What are some mature ways to decide issues within groups?
*May 1, 2013*

**Help english**

They can block Facebook in their computer. Instead of spending time chatting in Facebook they can go read a book of help your mom in the house. You can also hang out with friends or do some other fun activities such as playing soccer or any kind of game.
*May 1, 2013*

**Math**

How much flour is in the bag
*April 29, 2013*

**Math**

Christy had a full bag of flour. She made two batches of muffins.each batch used 2 1/4c if flour. Then she used 1 1/2c of flour to make pancakes. The remaining of 2 1/6c to make banana bread.
*April 29, 2013*

**Math**

Write multiplication sentence for 4 4/5+ 4 4/5 + 4 4/5
*April 24, 2013*

**Java programming**

List all overloading methods (including constructors) in this coding.. public class Circle { private double radius; private String colour; public Circle() { radius = 0; colour = ""; } public Circle (double r) { radius = r; } double getRadius() { return radius; } ...
*April 16, 2013*

**Java programming**

Write a Java program that stores Customer accounts with the attributes: (i) Name of the depositor (ii) Account number (iii) Type of account (iv) Balance amount And the methods: (i) Deposit (ii) Withdraw (iii) Display the balance You need to create an array of objects to store ...
*April 16, 2013*

**statistics**

The average height of 18-year-old American women is 64.2 inches. You wonder whether the mean height of this year’s female graduates from your local high school is different from the national average. You measure an SRS of 78 female graduates and find that = 63.1 inches. ...
*April 11, 2013*

**math-7th grade algebra 1**

Please show the steps and explain how to do this as well. 3√8 · 2√5
*April 10, 2013*

**math algebra 1**

Please show the steps and explain how to do this as well. 3√8 · 2√5
*April 10, 2013*

**math**

thank you so much :)
*April 10, 2013*

**math**

Please show the steps and explain how to do this as well. 3√8 · 2√5
*April 10, 2013*

**history**

What was the MAIN focus of African American activists in 1964?
*April 7, 2013*

**Physics **

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?
*March 30, 2013*

**Physics **

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?
*March 30, 2013*

**Physics**

In a typical living cell, the electric potential inside the cell is 0.070 V lower than the electric potential outside the cell. The thickness of the cell membrane is 0.10µm. What is the magnitude and direction of the electric field (E) within the cell membrane?
*March 30, 2013*

**Geometry**

If EF=2x-19, FG=3x-15, and EG=26, find the values of x, EF, And FG
*March 13, 2013*

**Math**

It has 6 sides but is the angle the same
*March 12, 2013*

Pages: **1** | 2 | 3 | 4 | 5 | Next>>