Tuesday

January 17, 2017
Total # Posts: 1,200

**chemistry**

1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3. Adding 10mL of 2M sodium hydroxide solution to 100mL of this buffer causes the pH to rise to 4.87. what is the total molarity of the original buffer?

*March 10, 2013*

**chemistry**

i am suppose to calculate the pH at the new conditions, but i am super lost. also for c and d i think you would have to figure out the moles, but then i do not know what to do from there.

*March 10, 2013*

**Physics II**

The 12*10^-8 is in ohm-m, and the wire resistance is in ohms. I copy pasted the question from "WebAssign" so I guess the symbol for ohms did not transfer over.

*March 7, 2013*

**Physics II**

A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 10-8 · m, and the density is 7.67 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 . What length ...

*March 7, 2013*

**Algebra**

What is the solution for this inequality? 8+6x≥7x+2-x

*March 5, 2013*

**Stat**

Suppose there are 2 black, 3 white, and 5 red marbles in an urn. You reach in and randomly select 3 marbles without replacement. And let X be the number of black marbles. Find the probability table for X.

*March 4, 2013*

**English**

1-how Do you think Mrs clemm reacted to Poe's message. 2-what new insight into Edgar Allan Poe did you get from this letter

*March 3, 2013*

**ignore this please**

ignore this one

*February 26, 2013*

**Algebra ASAP**

Elimination ( show work please) 6x+5y=39 3x+5y=27

*February 26, 2013*

**Algebra**

If a temperature dropped from 44degrees to -56 degrees in a 24 hour period, how many degrees did the temperature drop during that time?

*February 26, 2013*

**Math**

graph the data in each table Perimeters of Similar Rectangles x 1 2 3 4 5 P ? ? ? ? ? Graph P 40 30 20 20 0 1 2 3 4 5 6 7 8 9 X Area of Similar Rectangles X 1 2 3 4 5 A ? ? ? ? ? A 40 30 20 10 0 1 2 3 4 5 6 7 8 9 X 1st rectangle is one side x bottom 2x then they pretty much ...

*February 25, 2013*

**chem**

how many moole of helium gas is needed to pressurize an evacuated 25.0L tank to a pressure of 120 atm at 25.0 C ?

*February 23, 2013*

**science**

How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?

*February 23, 2013*

**Algebra**

Yes that is thank you so much (:

*February 22, 2013*

**Algebra**

I am confused on how solve this substitution problem 4y+3=3y+x 2x+4y=18 If you can, show work please (:

*February 22, 2013*

**Chemistry**

0.135molHe

*February 22, 2013*

**Chemistry**

The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr? As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr?

*February 19, 2013*

**AP English 11**

I have to write a paper for english, i keep getting bad grades and i use the paper rater sight always to make sure i do my best. it shows i get a 95 and my teacher gives me 30-20 points less and i don't under stand what im doing wrong. i need help on my next paper which is...

*February 18, 2013*

**AP English 11**

I have to write a paper for english, i keep getting bad grades and i use the paper rater sight always to make sure i do my best. it shows i get a 95 and my teacher gives me 30-20 points less and i don't under stand what im doing wrong. i need help on my next paper which is...

*February 17, 2013*

**chemistry**

A tyre should not be overinflated is that when air is pumped into the tyre molecules,it will start getting bigger in size there by affecting the walls of its container,and with this,the tyre will get bursted.

*February 16, 2013*

**Chemistry**

Consider titrating an unknown chloride sample with 0.10 +/- 0.01M AgNO3 and the following data: Initial Buret reading-0.19 +/- 0.02mL Final Buret reading- 9.26 +/- 0.03mL Unknown sample mass- 95.0 +/- 0.2mg Find the weight 5 of Cl- in the sample.

*February 12, 2013*

**Geometry urgent!**

If the radius of the two areas is 12in find the length of a chord of an arc of 45 degrees, 30 degrees and 60 degrees. I really don't know what to do here! Please help!!

*February 12, 2013*

**Geometry**

Thank you so much Steve!

*February 12, 2013*

**Geometry**

I have two questions... #1 if the radius of the two areas is 12in find the length of a chord of an arc of 45, 35, and 60 degrees. #2 the bases of a trapezoid are 30in and 9in and the nonparallel sides are 10in and 17in. Find the area.

*February 12, 2013*

**Geometry**

I have two questions... #1 if the radius of the two areas is 12in find the length of a chord of an arc of 45, 35, and 60 degrees. #2 the bases of a trapezoid are 30in and 9in and the nonparallel sides are 10in and 17in. Find the area.

*February 12, 2013*

**statistics**

a vending machine dispenses coffee into an 8 oz cup. the amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.03 oz.you can allow the cup to overfill 5 percent of the time. what amont should you set as the mean amount of coffee to be ...

*February 10, 2013*

**physics**

A tennis ball is struck and departs from the racket horizontally with a speed of 26.7 m/s. The ball hits the court at a horizontal distance of 18.7 from the racket. How far above the court is the tennis ball when it leaves the racket?

*February 7, 2013*

**Math**

If the line passing through the points (a, 1) and (5, 7) is parallel to the line passing through the points (8, 8) and (a + 2, 1), what is the value of a? a = ?

*February 6, 2013*

**math**

Jill said that an angle is made of any two rays. Is she correct? Explain

*February 5, 2013*

**math**

A farmer needs to fence a rectangular piece of land.She wants the length of the field to be 55 feet longer than the width. If she has 1310 feet of fencing material, what should be the length and the width of the field?

*January 24, 2013*

**Trig**

A 60-foot flagpole stands on top of a building. From a point on the ground the angle of elevation to the top of the pole is 45 degrees and the angle of elevation to the bottom of the pole is 42 degrees. How high is the building?

*January 19, 2013*

**Math**

A local men's suit manufacturer had 2,742 square meters of fabric to make identical suits, all of the same size. If each suit used 7.4 of fabric, how many suits could be made?

*January 16, 2013*

**understanding and managing money**

carmen santiago works for a number of business as a consultant. She has helped design accounting systems, provided accounting services and analyzed the finacial stregth of her clients' business. carmen is working as a

*January 10, 2013*

**business**

among factors that influence consumer decision-making, buyers remorse is generally associated with

*December 31, 2012*

**Economics**

The total operating revenues of a public transportation authority are $100M while its total operatiing costs are $120M. The price per ride is $1, and the price elasticity of demand for transportation ia -0.4. The transportation authority has to eliminate its operating deficit...

*December 10, 2012*

**math**

Solve: 1 2/8 x 2 1/9= A 2 10/36 B 3 11/36 C 4 5/36 D 2 23/36

*December 6, 2012*

**math**

A crew needs to pick up litter along one side of a section of highway that is 49.5 kilometers long. How many kilometers must the crew clean each day in order to finish the job in 5.5 days? A 0.11km B 0.9 km C 9.0 km D 11.2 km

*December 6, 2012*

**Math**

mr. prisillas leaves for work at 7:10am he arrives at work at 8:20 a.m how long does it take him to get to work

*December 6, 2012*

**math**

Because there are 3 tins, which can be represented by C is C+C+C=36 so 3C=36, then you solve for C so yes, but I think the equation is 3C=36

*December 5, 2012*

**math**

Ms Sue , Is the answer to this equation : The same number of cookies,C, in each of three tins makes a total of 36 cookies. Is the equation 36 = C divided by 3?

*December 5, 2012*

**Math 310 Math for Teachers**

At the same time but different speeds, two trains X and Y left from different stations, A and B, and moved facing each other (to opposite directions). They first met at the point that was 120 miles from station A. When X and Y reached the destinations (B and A respectively), ...

*December 5, 2012*

**math**

is it C. 36= C divided by 3 ?

*December 5, 2012*

**math**

which eguation matches the wrds? The same number of cookies,C, in each of 3 tins makes a total of 36cookies. A.) 36-c=3 B) c x 3 = 36 C) 36 = c divided by 3 D) c = 3 + 36.

*December 5, 2012*

**Science**

it's fill in the blank

*December 2, 2012*

**Science**

______ is a major component of bones and the proteins that build muscles.

*December 2, 2012*

**science**

Carnival mirrors make reflections look very odd. What makes the reflections in these mirrors so strange?

*November 26, 2012*

**science**

Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

*November 26, 2012*

**science**

Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

*November 26, 2012*

**science**

Carnival mirrors make reflection look very odd. What market the reflections in these mirrors so strange?

*November 26, 2012*

**pre-algebra**

thank you so much

*November 25, 2012*

**pre-algebra**

Nicholas is making cranberry relish for Thanksgiving. The recipe requires five pints of cranberries. Nicolas only has four cups of cranberries. How many more cranberries will Nicholas need to make cranberry relish? Show all your work. Please help don't get how to show my work

*November 25, 2012*

**chemistry**

Calculate the volume of gas you would expect to be evoleved if X mol of magnesium were reacted with an excess of HCl at standard conditions. Would the answer be X, 22.4X, or 22400X?

*November 24, 2012*

**math**

At a certain college, there are 7 men for every 5 women. If there are 440 more men than women, what is the total enrollment?

*November 16, 2012*

**social studies**

i think 4 is correct

*November 15, 2012*

**7th grade math Ms. Sue please check**

emm is it right tho?

*November 14, 2012*

**SOCIAL STUDIES**

WHICH OF THE FOLLOWING STATEMENTS IS SUPPORTED BY INFORMATION IN THE MAP 1] THE U.S GOVERMENTS WET TO WAR WITH FRANCE IN 1803 TO GAIN TERRITORY WEST OF THE MISSISSIPPI RIVER.2]IN 1865 THE U.S ECONOMY PRODUCED RAW MATERIALS TO BE EXCHANGED ABROAD FOR MANUFACTURED GOODS.3]DURING...

*November 14, 2012*

**SOCIAL STUDIES**

WHICH OF THE FOLLOWING STATEMENTS SUPPORTED BY THE INFORMATION IN THE MAP 1] AUSTRASLIA IS SELF-SUPPORTING IN OIL.2]AFRICA TRADES OIL ONLY WITH SOUTH AMRICA.3] THE SOVIET UNION HAS TRADE ROUTES WITH EVERY MAJOR CONTINENT.4] ALL OF THE MAJOR CONTINENTS HAVE CRUDE OIL RESERVERS ...

*November 14, 2012*

**SOCIAL STUDIES**

WHICH STATEMENTS BEST SUMMARIZES THE PARAGRAPH'S MAIN POINT? PLEASE

*November 14, 2012*

**SOCIAL STUDIES**

WHICH OF THE FOLLOWING STATEMENTS IS BEST SUPPORTED BY THE NEW STUDIES

*November 14, 2012*

**SOCIAL STUDIES**

WHICH ONE OF THE FOLLOWING CONCLUSIONS IS SUPPORTED BY THE RESULTS OF THESE STUDIES PLEASE HELP ME

*November 14, 2012*

**math**

I need to write a multiplication or division equation with a variable for the unknown for this problem: Maddie plants 3 seeds in each of 15 plots.

*November 13, 2012*

**gen chem II**

At what temperature does the average speed of an oxygen molecule equal that of an airplane moving at 560 mph?

*November 11, 2012*

**UT**

At STP a sample of neon gas occupies 502 cm3. How many moles of neon gas does this represent? answer in mols

*November 7, 2012*

**math**

how can you tell by looking at the coordinates of a point whether the point is on the x axis or y axis?

*November 7, 2012*

**algebra**

how can you tell by looking at the coordinates of a point whether the point is on the x axis or y axis?

*November 7, 2012*

**Spanish 3 preap**

I am curently using ser vs. estar. Can you tell me when I am suppposed to use these?

*November 4, 2012*

**algebra**

find an equation of i line given the slope and one point on the line m=2;(3,2)

*October 28, 2012*

**algebra**

A tiger can eat food that weighs up to 15% of its body weight. If a tiger can eat 75 pounds of food, how much does a iger weigh? Write and solve a percent proportion>

*October 25, 2012*

**geometry**

the vertices of a triangle are p(2,8, q(-8,-7)and r(5,-6). name the vertices of the image refected in the x-axis?

*October 18, 2012*

**4th grade algebra**

Christina has 1 less than 3 times as many bottles of nail polish as her sister, Lucia. They have a total of 25 bottles. How many more bottles does Christina have than Lucia?

*October 17, 2012*

**math**

Julie has a mystery number. When she divides the mystery number by 5, the remainder is 1 When she divides the mystery number by 6 the remainder is 4 When she didvides the mystery number by 7 the remainder is 6 What is the smallest number that could be Julies mystery number?

*October 15, 2012*

**Algebra**

(3/10)x-3=6

*October 9, 2012*

**business finance**

a bond that has $1,000 par value (face value) and a contract or coupon interest rate of 11.5%. The bonds have a current market value of $1,126 and will mature in 10 years. the firms marginal tax rate is 34%. what is the cost from this bond debt is __%

*October 8, 2012*

**Ap Chemistry**

A 100.0 mL aliquot of 0.200 M aqueous potassium hydroxide is mixed with 100.0 mL of 0.200 mL of 0.200 M aqueous magnesium nitrate.

*October 4, 2012*

**math**

Order each set of numbers from least to greatest. 0.27,0.56,0.212, 0.563, 0.276, 0.5

*October 1, 2012*

**Geomatic Sequence**

find the fifth term in the sequence a1=-4a2=8a3=-16 can you guys help me

*October 1, 2012*

**elementary school math**

Which of the following symbols could you use to complete this number sentence? Explain your reasoning. .= + < # - > 7,000+800+9. 7,000+900+8

*September 28, 2012*

**linking verbs**

Is were a linking verb in this sentence? The chidren _were_disappointed when the game was cancelled.

*September 25, 2012*

**elementary math**

Which of the following symbols could you use to complete this number sentence? Explain your reasoning. = + < - > 7,000+800+9. 7,000+900+8

*September 24, 2012*

**math**

Hand stay that 546 can be represented by 53 tens and 16 ones. Us she correct? Explain.

*September 24, 2012*

**math**

What would be the simplest form of these numbers?:7/12,8/21,14/35

*September 24, 2012*

**Math**

what is 90 rounded to the greatest place?

*September 20, 2012*

**Chemistry**

That's already scientific notation!! You had your answer and you didn't even know it!!

*September 16, 2012*

**Math**

Light travels at 3.0x10^8 meters/seconds. A light-year is the distance light travels in one year. Given that there are 3.15x10^7 seconds in one year, how many meters are in a light year?

*September 5, 2012*

**Math**

Solve the equation for x. 30x+10x=40=16x+8

*September 4, 2012*

**math**

Use the associative property of multiplication to analyze the equation. (6X13)x8=zx(13x8) what is the value of z? a. 1 b. 6 c. 8 d. 13

*August 24, 2012*

**math**

A is the answer

*August 24, 2012*

**math**

Which equation demonstrates the commutative property of addition? a. 2x+y=y+2x b. 2x+y=2x+y c. 2x+y=2(x+y) d. 2x+y=y+(2+x)

*August 24, 2012*

**math**

The Great seto Bridge in Japan is 9,368 meters long. A bicyclist riding across the bridge can travel 500 meters in 1 minute. A person walking can travel 100 meters in 1 minute. How many minutes shorter is the bicycle trip than the walk?

*August 15, 2012*

**health**

D is correct

*August 13, 2012*

**English**

These answers are my answers, they might not be the correct answers though. Keep in mind...I might be wrong. 1.a 2.c 3.c 4.b 5.c 6.d 7.d 8.b 9.a 10.a 11.b 12.a 13.d 14.d

*August 13, 2012*

**health**

me too

*August 11, 2012*

**math**

Two trains heading toward each other are 400 miles apart. One train travels 15 miles per hour faster than the other train. If they arrive at the same station in 5 hours, how fast is each train traveling?

*August 9, 2012*

**Science**

Determine the pH of a .10M solution of KA, the potassium salt of HA. For HA, Ka=1.0x10^-5

*August 8, 2012*

**Chemistry**

Need help to identify 10 facts about the reaction that can be read in this equation: 2AgNO3 (aq) + PbBr2 (s) --> 2AgBr (s) + Pb(NO3) 2 (aq) I had already balanced the equation original was AgNO3 (aq) + PbBr2 (s) --> AgBr (s)+ Pb(NO3) 2 (aq)

*August 1, 2012*

**PHI 103**

U need to attempt to put the questions with ur answers on the forum and someone will verify if you are right. Do five questions with answers on each forum. No one is just gonna do your homework for you! U pay all that money to go to school, you gotta learn!

*July 31, 2012*

**Biology**

Questions for Exam 1 for Concepts in Biology 12 edition

*July 19, 2012*

**Government**

Which of the following is NOT a reason for holding congressional investigations? A) to focus public attention on an important issue B) to oversee the executive branch and its operations C) on executive order from the President D) to gather information i need help

*July 19, 2012*

**Research and Writing**

I am trying to write an internal memorandum and must analogize two cases first. I cannot get it straight in my head what the process it for making the analogy! HELP!!

*July 14, 2012*

**Math**

The Little Thrifty Market has a parking lot with dimensions 125 feet by 210 feet. How many square yards is that?

*July 12, 2012*