Saturday

April 30, 2016
Total # Posts: 1,355

**Gas Stoichiometry **

What mass of ammonia is produced when 3.08 L of nitrogen (at STP) react completely in the following equation?
*May 6, 2013*

**chemistry **

We have a tank that contains O2 at 146 mmHg, N2 at 146 mmHg, and CO2 at 138 mmHg. We then add 135 mmHg of Ar. What is the pressure in the tank?
*May 6, 2013*

**chemistry **

We have a tank that contains O2 at 146 mmHg, N2 at 146 mmHg, and CO2 at 138 mmHg. We then add 135 mmHg of Ar. What is the pressure in the tank?
*May 5, 2013*

**chemistry**

Calculate the partial pressure of helium in a 1.00 L flask that contains equal numbers of moles of He, Ne, and Ar at a total pressure of 8.35 atm.
*May 5, 2013*

**science**

In trying to lift a heavy stone into a moving truck, a worker utilizes rope, a rug, and two long planks of wood. Identify what forces are at work in making it too hard for the worker to just lift the stone up on his back.
*May 3, 2013*

**math**

that is everything the question had...it does not have any more information
*May 3, 2013*

**math**

Ms.Sue why is it incomplete?!
*May 3, 2013*

**math**

Month J F M A M J J A S O N D TOTAL 0 0 0 0 1 21 27 16 12 2 0 0 The chart above represents the monthly rainfall in inches in Calcutta in a certain year. Calculate and explain the significance of the following measures based on this data.
*May 3, 2013*

**math**

To square 75, one can multiply (70)(80) and add 25 to that product. Can someone explain how this would work, without calculating?
*May 3, 2013*

**math**

To square 75, one can multiply (70)(80) and add 25 to that product. Can someone explain how this would work, without calculating?
*May 3, 2013*

**Math**

A trail mix contains a 4: 7 ratio of raisins to peanuts. How many kilograms of raisins are there if there are four kilograms of peanuts in the mix?
*May 2, 2013*

**maths**

what length is each side of a rhombus if its perimetre is 120cm
*April 24, 2013*

**math**

3, answer = 500 4, answer = 10 5, 382. 50
*April 16, 2013*

**math**

Graph the function f(x)=6-1/(x+4)^2 using transformations. State: a.the domain b.the range c.the asymptotes i do not get this at all, i am totally lost! please help!!!
*April 15, 2013*

**math**

a cycle company make bicycles, tricycles an unicycles. Last week they made 120 more bicycles than unicycles, and 4 times as many tricycles as unicycles. If they made 75 more bicycles than tricycles, how many unicyles did they make? I dont understand how to do this, please help
*April 10, 2013*

**Math**

A car wheel has a diameter of 0.4 meters. Work out how many full turns the wheel makes when the car travels a kilometer
*April 10, 2013*

**Algebra please help!!**

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On the bottom k=1 to...
*April 8, 2013*

**Algebra please help!!**

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On the bottom k=1 to...
*April 8, 2013*

**Algebra please help!!**

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On the bottom k=1 to...
*April 8, 2013*

**Algebra **

I need some help with algebra as I'm confused as to how to solve them. Find the common difference d and the value of a1 using the information given. 1. a6= 5/4, a8= 9/4 Evaluate each sum. 2. E like symbol that has a 29 on the top. On the bottom n=1 and to the right (4n-1) ...
*April 8, 2013*

**Algebra**

Thank you this was very helpful!
*April 8, 2013*

**Algebra **

I need some help with algebra I'm not sure how to get to the answer. Find the number of terms in each sequence. 1. a1=4 an=42 d=2 2. a1--0.3 an=-36 d=2.1 3. 1/12, 1/8, 1/6, 5/24, 1/4,......9/8 Evaluate each sum. 1. There is an e like symbol that has a 15 on top on the ...
*April 8, 2013*

**math**

If Deborah ate five pieces of a pizza that was cut into 16 pieces, what percentage of the pizza did she eat?
*April 5, 2013*

**Physics**

A compact disk rotates from rest to 500 rev/min. in 5.5s. a) What is the angular acceleration assuming it is constant. b) How many revolutions does the disk make in 5.5 s. c) How far does a point on the rim 6 cm from the center of the disk traveling during the 5.5 s.
*April 4, 2013*

**Chemistry**

Determine the number of particles in this sample. Identify the unit as a formula unit or a molecule. 58 g of chromium (III) sulfate.
*April 3, 2013*

**math**

a cleaner charges $0.50 per square foot to polish wood floors. a school hall has a floor area of 30 feet by 50 feet. what would be the total cost to polish the floor of the school hall? A. $80 B. $375 C $750 D $1,500 I think it is C.
*March 27, 2013*

**math**

A cleaner charges $0.50 per square foot to polish wood floors. A school hall has an area of 30 feet by 50 feet. What would be the total cost to polish the floor of the school hall? A.$80 B.$375 C.$750 D.$1,500 What is the answer?
*March 26, 2013*

**algebra**

What is 80 is 20 times as many as 5 equal in a number sentence?
*March 25, 2013*

**3rd grade math**

it is A. 1/2
*March 20, 2013*

**Physics**

A) With what minimum speed must you toss a 190 g ball straight up to hit the 15.0 m-high roof of the gymnasium if you release the ball 1.70 m above the ground? Solve this problem using energy. B) With what speed does the ball hit the ground?
*March 20, 2013*

**Physics**

A) With what minimum speed must you toss a 190 ball straight up to hit the 15.0 -high roof of the gymnasium if you release the ball 1.70 above the ground? Solve this problem using energy. B) With what speed does the ball hit the ground?
*March 20, 2013*

**4th grade math**

the answer is 168 because there are 12 inches in a foot. you could add 12 for 14 times or do 12*14.
*March 19, 2013*

**Dynamics, Math**

a plane is flying horizontally at an altitude of 420m. A bomb was released, how far horizontally point bomb hit the ground?
*March 19, 2013*

**Dynamics, Math**

a plane is flying horizontally at an altitude of 420m. A bomb was released, how far horizontally point bomb hit the ground?
*March 19, 2013*

**English**

This time management tool is used for recording how you spend your time daily.
*March 13, 2013*

**math**

5x+4y-5z=44 3x-4y+3z=-10 6x-3y+6z=-15 help solve it
*March 13, 2013*

**math**

4x-y-3z=8 2x+2y-z=3 6x+y-3z=2 help me solve matrices
*March 13, 2013*

**english**

so what is correct answer,thanks
*March 8, 2013*

**english**

Answer is A
*March 8, 2013*

**Physics**

A 50.0g ball of clay traveling east at 3.00 m/s collides and sticks together with a 50.0g ball of clay traveling north at 3.50m/s. What is the speed and direction of the resulting ball of clay?
*March 7, 2013*

**Calculus**

Determine if the series converges or diverges. Sum (n=1, infinity) (2*4*6...2n)/n! My main problem is I have no idea what to do with the numerator.
*March 4, 2013*

**Physics**

A conical pendulum is formed by attaching a 0.200kg ball to a 1.00 m-long string, then allowing the mass to move in a horizontal circle of radius 40.0cm . The figure (Figure 1) shows that the string traces out the surface of a cone, hence the name. A) What is the tension in ...
*February 28, 2013*

**Physics**

A 220g block on a 54.0cm -long string swings in a circle on a horizontal, frictionless table at 70.0 rpm. A) What is the speed of the block? m/s B) What is the tension in the string? N
*February 28, 2013*

**Physics**

A 220g block on a 54.0cm -long string swings in a circle on a horizontal, frictionless table at 70.0 rpm. A) What is the speed of the block? m/s B) What is the tension in the string? N
*February 28, 2013*

**maths**

A box of mass 3 units rests on a horizontal rough surface and is tied to the end of a rope. Peter pulls on the rope and exerts a force of magnitude sqrt(2g) with the rope making an angle of Pi/4 with the horizontal. Given that the box is on the point of slipping, show ...
*February 27, 2013*

**Algebra**

the length of a rectangular piece of land is 40 cm more than two times its width. the perimeter is 680 cm. Find its dimensions
*February 26, 2013*

**maths**

A particle moves in a plane with trajectory given by the polar equation, r = a(1 + cos );where a is a positive constant Suppose that the particle moves such that theta(t) =omega for all t; that is, the angular velocity theta is constant.Show that the ...
*February 20, 2013*

**- Social Studies**

The investors might make money or lose money because it is successful or unsuccessful.
*February 14, 2013*

**Chem II**

I feel I wasnt given enough information to answer the question originally, but I will try to do my best with what I was given.
*February 12, 2013*

**Chem II**

How many grams of ethylene glycol (C2H6O2) per kilogram of water are needed to give protection up to 120 °C in a car radiator?
*February 12, 2013*

**Calculus**

Approximate the sum Sigma (lower n = 0; upper infinity) (17/3)*(-1/2)^n
*February 11, 2013*

**Calculus**

What is the graph of the sequence An = (-1)^n?
*February 11, 2013*

**Calculus**

Find the sum of the convergent series. Sigma (lower n = 0; upper infinity) 8*(4/5)^n
*February 11, 2013*

**Calculus**

Identify the two series that are the same. a. Sigma (lower n = 4; upper infinity) n(3/4)^n b. Sigma (lower n = 0; upper infinity) (n+1)(3/4)^n c. Sigma (lower n = 1; upper infinity) n(3/4)^(n-1)
*February 11, 2013*

**Calculus**

Find the values of x for which the series converges. Sigma (lower index n = 0; upper index infinity) [(x+1)/4]^n
*February 11, 2013*

**Calculus**

Determine whether the sequence with the given nth term is monotonic. Find the boundedness of the sequence. Otherwise, indicate DNE. An = ne^(-n/2)
*February 11, 2013*

**Calculus**

Determine the convergence or divergence of the series. Indicate the test that was used and justify your answer. Sigma (lower index n = 1; upper index infinity) [(-1)^n*3^n]/(n*2^n)
*February 11, 2013*

**Calculus**

Test for convergence or divergence. Indicate the test that was used and justify your answer. Sigma (lower index n = 2; upper index infinity) [ln(n)]/n
*February 11, 2013*

**Calculus**

Use the Direct Comparison Test to determine the convergence or divergence of the series. Justify your answer and show all of your work. Sigma (lower index n = 1; upper index infinity) 4^n/(3^n-1)
*February 11, 2013*

**Calculus**

Test for convergence or divergence. Indicate the test that was used and justify your answer. Sigma (lower index n = 4; upper index infinity) 1/(3n^2-2n-15)
*February 11, 2013*

**Calculus**

Determine the following about the series. Indicate the test that was used and justify your answer. Sigma (lower index n = 1; upper index infinity) [sin((2n-1)pi/2)]/n A. The series diverges B. The series converges conditionally. C. The series converges absolutely. D. It cannot...
*February 11, 2013*

**Calculus**

Determine the convergence or divergence of the series. Find the limit. Indicate the test that was used and justify your answer by showing evidence why the test succeeds or fails. Sigma (lower index n = 1; upper index infinity) 12/[n(n+3)]
*February 11, 2013*

**Calculus**

A deposit of $1000 is made at the beginning of each month in an account at an annual interest rate of 3% compounded monthly. The balance in the account after n months is An = 1,000(401)(1.0025^n - 1). (a) Compute the first six terms of the sequence {An}. (b) Find the balance ...
*February 11, 2013*

**maths**

What is the vector equation of the line joining the points (5; 0; 1) and (7; 4; 7)?
*February 11, 2013*

**maths**

prove that if a is not equal to zero and if a * b = a * c and a ^ b = a ^ c then b = c [Hint: calculate a * (b-c) and a ^ (b-c) vectors mechanics
*February 6, 2013*

**college chem**

if the length of one side of a square is 12.0, what is the perimeter of the square?
*February 4, 2013*

**Math**

where did the 1.2 come from?
*January 31, 2013*

**Math**

The markup on a used car was at least 20% of its current wholesale price. If the car was sold for $5900, what was the maximum wholesale price? (Give your answer correct to the nearest dollar.)
*January 31, 2013*

**chemistry**

i dont know i need help
*January 29, 2013*

**Math**

Write each rate as a fraction in lowest terms: 48 gallons in 14 minutes
*January 29, 2013*

**Math**

Write each rate as a fraction in lowest terms: 48 gallons in 14 minutes
*January 29, 2013*

**Math**

For a certain product, one case holds 8 boxes and each box holds 12 items, how many total cases are needed to hold 500 items?
*January 19, 2013*

**math**

The world's tallest building is the Burj Khalifa in Dubai at 828 m tall. The CN Tower in Toronto is 553 m tall. Ryan wants to compare the Burj Khalifa and the CN Tower by creating rectangular prism models on a 10 cm by 10 cm square base. He has decided to represent the ...
*January 15, 2013*

**math**

A band poster that measures 90 cm by 40 cm is reduced by a scale factor of 1/6 so it can fit on a postcard. a) What are the dimensions of the postcard image? b) By what scale factor, to the nearest hundredth, was the area of the poster decreased in the reduction process?
*January 15, 2013*

**algebra**

Solve the equation. Check your solution. 164=x-59
*January 15, 2013*

**consumer math**

Lily Adams purchased a $1,000 bond at 70. The bond pays 4%. What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?
*January 14, 2013*

**consumer math**

Lily Adams purchased a $1,000 bond at 70. The bond pays 4%. What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?
*January 14, 2013*

**consumer math**

Joe McCain purchased 5 $1,000 bonds at 89. The bonds pay 6%. What was the cost of the bonds? $4,450 ? What was the total annual interest? What is the yield?
*January 14, 2013*

**algebra**

What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?
*January 14, 2013*

**algebra**

Jane Investor purchased a $10,000 bond at 90. The annual interest is 5%.
*January 14, 2013*

**math**

The sides of a square with an area of 49 cm2 will be reduced by a scale factor of 5/8. Determine the area of the reduced square to the nearest square centimetre.
*January 14, 2013*

**math**

Jamia is deciding between two long-distance telephone plans: • Plan A charges $5 per month plus 6¢/min. • Plan B charges $20 per month plus 1¢/min. Jamia usually makes about 200 min of long distance calls each month. Which plan costs less? Show your ...
*January 12, 2013*

**Math **

3(4x+6)+7
*January 7, 2013*

**Algebra**

Kendra owns a restaurant. She decides to charge $1.50 for two eggs and one piece of toast and $0.90 for one egg and one piece of toast. How much money is she charging for each egg and each piece of toast?
*January 3, 2013*

**MAtth**

ITEM NUMBER THREE 1 Description of the item:Printer 2 Stated price on the website: 229.99 (do not round to whole dollars) 3 Website where the item was found:Staples I dont know how to do questions # 4 and 5 4 Price of item after a 10% increase with sales tax: 5 Final price:
*December 18, 2012*

**ENGLISH 9 BIOGRAPHY**

i think u should do jistin bieber because its more easier, if u do one direction then u have to write about 5 people. u can do one direction of that band.
*December 15, 2012*

**Algebra**

The number of bacteria in a stagment pond doubles every hour. A farmer sprays it every two hours and kils 3/4 of bacteria immediately. If there are 10,000 live bacteria left after the farmer sprays at noon, how many live bacteria are there at 11 p.m. that night?
*December 12, 2012*

**My Math**

thanks
*December 11, 2012*

**My Math**

am i correcect steve
*December 11, 2012*

**My Math**

i mean 1b 2c 3c 4a
*December 11, 2012*

**My Math**

I think the answers are 1 c 2a 3b 4a
*December 11, 2012*

**My Math **

ecide whether each equation has one solution, no solutions, or infinitely many solutions. 1. 2(x – 3) = 2x (1 point) one solution no solutions infinitely many solutions 2. 3(y – 3) = 2y – 9 + y (1 point) one solution no solutions infinitely many solutions 3. 10x...
*December 11, 2012*

**math**

f f + (-20) > -7 f = ?
*December 3, 2012*

**political science- PHL**

is it a comprehensive answer? Machiavelli (in terms of political philosophy) Machiavelli was an Italian philosopher. A famous book he wrote is ‘The Prince’ which still have impact to today’s politics. It is about the rise and fall of states and what the leader ...
*December 1, 2012*

**political science- PHL**

how Hobbes, Machiavelli and Rousseau are relevant? little guidance please
*December 1, 2012*

**political science- PHL**

hello can u help me please? write a few words about Machiavelli, Locke and how they are relevant today? John Locke is another philosopher who is considered as relevant today for some of his ideas he expressed. His writings were a great influence to the founders of United ...
*December 1, 2012*

**algebra**

A submarine is 700 meters below the surface of the ocean. it is ascending at a rate of 35 meters every minute. What does x represent and What y represent
*November 27, 2012*

**psych**

1.21 (1 pts.) William is acutely retarded and requires intense care. His IQ has been measured at approximately 15. What term would be used to classify William's level of retardation? A) mild B) moderate C) severe D) profound # 1.22 (1 pts.) Shannon has been diagnosed with...
*November 27, 2012*

**psych**

1.11 (1 pts.) While Pete was out playing touch football with his friends, he tripped, fell, and bumped his head on the ground. Immediately afterward, he was very disoriented and kept asking his friends what time it was. Pete may have experienced A) delirium. B) dementia. C) ...
*November 27, 2012*