Saturday

February 28, 2015

February 28, 2015

Total # Posts: 1,055

**math**

what is equal to 12/40? 0.3%, 3%, 12%,or 30%
*January 24, 2012*

**Finite: College Math**

A student wants to buy 3 CDs, but assume that there are 6 CDs featuring the piano, 4 CDs featuring the trumpet, and 7 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2 different instruments are selected?
*January 20, 2012*

**math**

If the first World Series occurred in 1903 and the Yankees have played in 36 Series as of 2006, what percent of the Series have the Yankees played in since 1903?
*January 4, 2012*

**math**

If the first World Series occurred in 1903 and the Yankees have played in 36 Series as of 2006, what percent of the Series have the Yankees played in since 1903?
*January 3, 2012*

**chemistry**

By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy 497 kJ mol-1
*December 20, 2011*

**chemistry**

using VSEPR THEORY explain why 1)BF4- is a tetrahedral molecule 2)SF3+ is a Trigonal pyramidal molecule 3)ICI4- IS A SQUARE PLANER molecule 4IF5 IS A SQUARE pyramidal molecule 5)PF5 IS A TRIGNAL BIPYRAMIDAl
*December 19, 2011*

**math**

Estimate each product: 3.87 X 25=
*December 13, 2011*

**math**

One day is 86,400 seconds. Express this number in scientific notation and estimate how far the sun's light travels i a day.
*December 7, 2011*

**chem sorry the last one did not have the question**

A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation: PCl5 (g) --------->...
*December 6, 2011*

**chem**

A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation: PCl5 (g) --------->...
*December 6, 2011*

**chemistry**

i understood it when i was looking at the homework i did not check it so i reposed it. i did not mean to
*December 6, 2011*

**chemistry**

Now convert moles C3H8 to moles CO2. I have about 0.06. Convert moles O2 to moles CO2. I have about 0.02. Both answers can't be correct; the correct value in limiting reagent problems is ALWAYS the smaller value and the reagent providing that value is the limiting reagent...
*December 6, 2011*

**chemistry**

1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are introduced, the two reactants are ignited and burned according to the balanced reaction: C3H8(g)+5O2(g)changes to 3CO2(g)+4H2O(g) After reaction, the ...
*December 6, 2011*

**chemistry**

A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
*December 6, 2011*

**chem**

A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation: PCl5 (g) --------->...
*December 5, 2011*

**chem**

Two gas tanks containing compounds A and B are connected by separate valves to two ends of a 10 meter glass tube as shown below. When both valves are thrown open at the same time A and B travel down the tubes towards each other. A white line appears when they meet and b has ...
*December 5, 2011*

**chem**

A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
*December 5, 2011*

**chem**

A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
*December 5, 2011*

**chem**

A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
*December 5, 2011*

**chem**

A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
*December 5, 2011*

**chemistry**

A fixed amount of gas initially at 100 K and pressure P1 is expanded from 1 L to 100 L in a piston. The temperature, T2, of the gas at this point is 50 K. The piston is then locked at constant volume V2=100 L and half the gas is pumped out at a constant temperature of T2 . The...
*December 5, 2011*

**chemistry**

1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are introduced, the two reactants are ignited and burned according to the balanced reaction C3H8(g)+5O2(g)changes to3CO2(g)+4H2O(g) After reaction, the ...
*December 5, 2011*

**chemistry**

The valve between a 5 liter tank in which the gas pressure is 911.925 kPa and a 10 liter tank containing gas at 4560 torr is turned open and equilibrium is established at constant temperature. What is the final pressure in the two tanks in atmospheres?
*December 5, 2011*

**physics**

Consider the 671 N weight held by two cables shown below. The left-hand cable had ten- sion T2 and makes an angle of 47 with the ceiling. The right-hand cable had tension T1 and makes an angle of 43 with the ceiling. a) What is the tension in the cable labeled T1 ...
*December 3, 2011*

**physics**

1.1sin47 + t2sin43 = 671 .804 + t2sin43 = 671 t2sin43 = 670.196 t2 = 982.694 Im really getting frustrated with this and its due at 11 pm tonight. Please help me. Is t1 right though??
*December 3, 2011*

**physics**

t1cos47 + t2cos43 = 0 t1cos47 = t2cos43 t1 = 1.1 t1sin47 + t2sin43 = 671 t2sin43 = 490.7 t2 = 719.6 I really have no idea how to do this
*December 3, 2011*

**physics**

T2 = 719.6 ??
*December 3, 2011*

**physics**

T1 = 1.1 ??
*December 3, 2011*

**physics**

I know that but I just dont get it
*December 3, 2011*

**physics**

How do you solve for them though? Thats what Im stuck on
*December 3, 2011*

**physics**

Consider the 671 N weight held by two cables shown below. The left-hand cable had ten- sion T2 and makes an angle of 47 with the ceiling. The right-hand cable had tension T1 and makes an angle of 43 with the ceiling. a) What is the tension in the cable labeled T1 ...
*December 3, 2011*

**short story paper**

yes ma'am lol thanksss im going to try to work on outline i guess
*December 2, 2011*

**short story paper**

my mom said to ask if u tutor pvt online or just in this type of setting? and she told me to say yes maam lol
*December 2, 2011*

**short story paper**

do you notice a difference ever when talking or chatting with southern kids vs northern when they are chatting with u?
*December 2, 2011*

**short story paper**

thanks miss sue i know i got a lot of yes whats? when i first got here lol
*December 2, 2011*

**short story paper**

what do u mean? forget about the maams and sirs and write about other stuff?
*December 2, 2011*

**short story paper**

oh sory i didnt see your response
*December 2, 2011*

**short story paper**

guess dumb
*December 2, 2011*

**short story paper**

or does it sound dumb//?
*December 2, 2011*

**short story paper**

I moved to the south I'm supposed to write about changes I'm thinking Yes ma'am or No ma'am? What do you think. It's expected here but not before
*December 2, 2011*

**short story paper**

hi is anyone here? Wanted to try out a topic
*December 2, 2011*

**statistics**

A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. I need more than the answer. I'm looking for help on the steps to get to the answer, please. Thanks
*December 1, 2011*

**alegebra**

Apply the rule (1.5x,1.5y)to the verticies of triangl ABC (0,2)=A (6,2)=B (4,4)=C to get triangle PQR
*December 1, 2011*

**physics**

A River Is Flowing at a velocity of 0.15 m/s west. a swimmer swims against the current at a velocity of 0.22 east, how manyu hours will it take him to swim 1 km?
*November 26, 2011*

**5th math**

14.4. Estimate low and high find product X6.2 ______
*November 21, 2011*

**Reading (hellp!)**

Can you give me a 6th grade sentence using the word calico,and a sentence using the word bravado please! ! !
*November 21, 2011*

**Math**

A famous detective was called in to solve a baffling murder mystery. He determined there was only one cause of death along with the following facts: a.Mr. Harold, the murdered man, was killed by a blow on the head with a brass candlestick. b.Either his wife, Mrs. Harold, or a ...
*November 10, 2011*

**Math **

ok sorry about that
*November 10, 2011*

**Kinesiology**

what is the torque generated to hold a 60N dumbell at 90 degrees? The dumbell is 0.6m from the shoulder, the centre of the mass of arm weighs 30N and is .25m from the shoulder, the moment arm is 0.05m?
*November 9, 2011*

**statistics**

we have a normal distribution with mean 76 and standard deviation 6.4, find the percent between 69.6 & 76?
*November 8, 2011*

**Living Environment**

Well, some abiotic factors in Ethiopia are: Volcanoes (lava) Sulfuric acid In Patagonia: Snow Volcanoes Wind Rockies: Snow Pakistan/Himalayas: Ice Snow Rocks Forests of China: Snow Wind
*November 8, 2011*

**calculus**

let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes
*November 3, 2011*

**medical**

accreditation affect the practical activities of record management in hospitals
*November 1, 2011*

**english**

thank you!
*October 30, 2011*

**english**

what's the difference between a major character and a minor? Is a minor like every other character besides the major characters?
*October 30, 2011*

**math**

find the area of a rectangle whose length is 3x and width is 4x +6
*October 21, 2011*

**religion**

what did hebrews do to please their gods?
*October 20, 2011*

**child day care**

of the forms used in a child care program which of the following would be required for the children?
*October 18, 2011*

**french**

I need help unscrambling these french words: srteelt, sbrtmie and eiuocrrl. thank you for helping :)
*October 17, 2011*

**Physics**

vf^2=2*9.8*520 vf=100.955 ??
*October 12, 2011*

**Physics**

A wrench falls out of the gondola of a balloon that is 520 m above the ocean. Assuming negligible air resistance, what was the wrench’s speed as it hit the water? The acceleration of gravity is 9.8 m/s2 .
*October 12, 2011*

**chem**

Use a temperature - composition diagram to explain why fractional distillation of two components is more easil? easily accomplished if the components have boiling points that differ by 20*C or more.
*October 7, 2011*

**algebra**

Thanks Ms. Sue
*October 2, 2011*

**algebra**

3/4 of a number is 1/2. Find the number in the lowest terms... please show work I am confused
*October 2, 2011*

**algebra**

Please help....struggling with word problems and please explain how to get the answer.... Max has a collection of 210 coins consisting of nickels, dimes, and quarters. He has twice as many dimes as nickels, and 10 more quarters than dimes. How many coins of each kind does he ...
*October 2, 2011*

**Physics**

A ball rolls off a table moving 3.6m/s in the horizontal direction. The table is 1.2 meters high. Find the amount of time needed for the ball to hit the ground.
*October 2, 2011*

**Human Resource Management**

Can someone give me an example of due diligence in human resources
*September 28, 2011*

**Math**

Jack is decorating for a party. He has 125 feet of paper streamers to use over 3 doorways. He will use the same amount for each door. How many feet will he use in each?
*September 27, 2011*

**Chemistry**

if one mole of gas occupies 22.4L at STP what is the volume at 25 degress C. and 3.05 atmosphere?
*September 25, 2011*

**physics**

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.5 m/s squared. At the same instant, a car passes the truck going 15 m/s. Where and when does the truck catch up with the car?
*September 23, 2011*

**chem**

a.What advantages does ligroin have over n-pentane as a recrystallization solvent? b. What advantages foes ethanol have over n-octanol as a recrystallization solvent?
*September 21, 2011*

**business**

Assignment Type: Individual Project Deliverable Length: 500–750 words Points Possible: 110 Due Date: 9/11/2011 11:59:59 PM CT You are a marketing manager interviewing for a new job at several different firms simultaneously. You expect to be asked the same questions in ...
*September 21, 2011*

**chem (urgent)**

Can someone please explain to me in simple terms what the eutectic point and temperature are?
*September 16, 2011*

**algebra 1**

38/100=x/800 set it up as a proportion so you cross multiply and get (38)(800)=100x 30400=100x soooo 304 kids like chocolate
*September 14, 2011*

**Algebra**

y=29+.32x
*September 14, 2011*

**Tulane Physics**

a rock is thrown unward off a cliff at a 45 degree angle. THe rock falls back to the elevation it was thrown from after 3.56 seconds. It hits the water 5.31 seconds after it was thrown. How high is the cliff? what is the horizontal distance from the cliff to the point in the ...
*September 14, 2011*

**Math**

yes! cuz its the absolute value of that equation, the numbers are just inverses of one another. so if A is 4 and B is 5 then 4-5 is -1, which would become 1 5-4 is 1, which remains 1 10-5 is 5 5-10 is -5, which becomes 5. they always stay the same. without the absolute value ...
*September 14, 2011*

**Chemistry**

I am having trouble balancing the following equation using the Ion-Electron Method. Se(solid) + HNO3(aqueous) ----> SeO2(solid) + NO(gas) + H2O(liquid) Can you explain the steps that you have to take to solve it?
*September 12, 2011*

**physics**

How long does it take an automobile traveling 68.3 km/h to become even with a car that is traveling in another lane at 54.3 km/h if the cars’ front bumpers are initially 121 m apart? Answer in units of s.
*September 8, 2011*

**statistics**

a pouch contains 97 green beads 72 red beads and 7 yellow beads. how many blue beads should be added so that the probability of drawing a red bead is 3/10 ?
*September 5, 2011*

** science**

4.444444444444
*August 23, 2011*

**physics**

A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.98 s after the car has passed the stop sign. She accelerates ...
*August 18, 2011*

**physics**

A passenger train is traveling at 30 m/s when the engineer sees a freight train 357 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.9 m/s. (a) If the reaction time of the engineer is 0.43 s, what is the ...
*August 18, 2011*

**physicsHELP!!!**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
*August 17, 2011*

**physicsURGENT!!!!!!**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
*August 17, 2011*

**physics**

Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 50 m apart. The train on the left accelerates rightward at 1.05 m/s2. The train on the right accelerates leftward at 0.93 m/s2. (a) How far does the train on the left travel ...
*August 17, 2011*

**physics**

A bus accelerates at 1.4 m/s2 from rest for 10 s. It then travels at constant speed for 26 s, after which it slows to a stop with an acceleration of magnitude 1.4 m/s2. (a) What is the total distance that the bus travels? (b) What was its average velocity?
*August 17, 2011*

**health**

How does technology improve our ability as health care organizations to market ourselves in our communities
*August 16, 2011*

**Calculus**

a) Find the Taylor series associated to f(x) = x^-2 at a = 1. Be sure to show the general term of the series. b) Find the radius of convergence of the series. c)Use Lagrange's Remainder Theorem to prove that for x in the interval of convergence with x > 1; the power ...
*August 8, 2011*

**chemistry**

a compound x has a solubility of 79g/100 g h20. when 24 g of x are added to 68 g of water the resulting mixture is homogeneous or heterogenous
*August 2, 2011*

**algebra**

x^3+216
*July 17, 2011*

**CAL**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)
*July 10, 2011*

**History**

What was the most important foreign policy goal of the United States between 1945 and 1990?
*June 7, 2011*

**History**

Why did some senators oppose the participation of the U.S. in the League of Nations following World War I?
*June 7, 2011*

**History**

Why did imperialism become popular again during the last quarter of the 19th century?
*June 7, 2011*

**chemistry**

the compound tin(II)fluoride,or stannous fluoride,once was a common ingredient in toothpaste.It is produced according to the following reactions: Sn(s)+2HF(g)->SnF2(s)+H2(g) if 45.0 grams og HF react with Sn,how many grams of stannous fluoride are produced?
*May 26, 2011*

**Chemistry 12**

how are we supposed to add them together when there is no I in the first equation?
*May 24, 2011*

**Chemistry 12**

wow thank you very much, that site is very helpful and you've been very helpful! Thank you!
*May 24, 2011*

**Chemistry 12**

i don't understand how i'm supposed to use the reduction potentials table to blance it
*May 24, 2011*

**Chemistry 12**

a) Use the standard reduction potentials table to balance the following redox equation: H2O2 + I + H = H2O + I2 b) Balance the following redox equation by the oxidation number method: Ag + HNO3 = AgNO3 + NO + H2O
*May 24, 2011*

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