# Posts by Cj

Total # Posts: 295

**AP Chemistry**

I still don't understand how to get the theroetical yield.

*September 19, 2012*

**AP Chemistry**

In the reaction below, 16 g of H2S with excess O2 produced 8 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %

*September 19, 2012*

**AP Chemistry**

For the reaction ? ZnS + ? O2 →? ZnO+? SO2 , what is the maximum amount of ZnO which could be formed from 14.06 g of ZnS and 5.56 mol of O2? Answer in units of g

*September 19, 2012*

**AP Chemistry**

So that would also equal 34 grams right?

*September 19, 2012*

**AP Chemistry**

Sulfuric acid (H2SO4) is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is ﬁrst burned: S + O2 → SO2 , then it is converted to SO3 using a catalyst: 2 SO2 + O2 → 2 SO3 . The resulting SO3...

*September 19, 2012*

**AP Chemistry**

I converted my 524ml to liters so that became 524000. Then I did 3.16x1655.84. Then converted back to liters. But i just realized i skipped a step, but I don't understand where I get the numbers at for that.

*September 19, 2012*

**AP Chemistry**

I don't really understand how to set it up. I'm to figure out my moles for water but after that I'm stuck.

*September 19, 2012*

**math**

jane have 4 nickels, 6 pennies, 4 dimes, and 2 quarters. she picks a coin at random. what is the probability that she will pick a nickel or a dime/

*September 13, 2012*

**math**

how do you write one third the volume of the pool as an expression

*July 17, 2012*

**english**

Would Steven Spielberg be a good speaker for a school assembly? Write a letter convincing your principal that Steven Spielberg would or would not be a good speaker for an assembly at your school. Use information from the passage to support your argument.

*July 16, 2012*

**geometry**

the sum of the measures of two acute angles is 110 degree.the suplement of the smaller anngle is 15 times the complement of the larger angle.what are the measures of the two angle?

*July 14, 2012*

**geometry**

the sum of the measures of an obtuse angle and acute angle is 12 degrees.the complement of the acute angle and one-half the suplement of the obtuse angle is 75 degree.find the measures of the two angles.

*July 14, 2012*

**computers**

Sorry but the right thing to do is pay attention in class.

*May 22, 2012*

**art**

1. In Judith Leyster’s paintings she used contrast. What is contrast? 2.Looking at van Gogh’s painting “The Olive Tree”: What season of the year do you think the colors suggest? Question 3. One of Pablo Picasso’s styles was cubism. What does cubism ...

*May 16, 2012*

**math**

Jeff wants to start a lawn maintenance service to earn money for college. He wants to charge $25 for a small lawn and $35 for a large one. It takes him an average of 2 hours to mow and trim a small lawn and 3 hours to do a large one. He wants to make at least $250 a week but ...

*May 9, 2012*

**Math**

Brett wants to use 40 feet of twine to mark off a rectangular area in his yard for a garden. What are the length and width for a garden with the greatest area?

*May 3, 2012*

**english essays**

Need help to proofread essay...

*April 29, 2012*

**Geometry**

If the length of the sides of two similar triangles are in the ratio 3:4, what is the ratio of the lengths of a pair of corresponding altitudes? What is the ratio of their perimeter?

*April 28, 2012*

**Algebra 2**

Andy wants the greatest possible harvest from his apple orchard. The orchard contains 220 dwarf trees per acre now, and Andy harvests, on the average, 1300 apples per tree. Because his trees are planted in rows of 10, he adds or removes trees only in groups of 10. Andy's ...

*April 24, 2012*

**english**

can some one help me

*April 5, 2012*

**english**

im just asking for help

*April 5, 2012*

**english**

its online ,not in a book

*April 5, 2012*

**english**

so then it would be the subject?

*April 5, 2012*

**english**

ms.sue??

*April 5, 2012*

**english**

so in the second question the gerund is playing? and its function is predicate nominative?

*April 5, 2012*

**english**

whats that ms.sue??

*April 5, 2012*

**english**

What is the gerund phrase and noun function of the gerund in these sentences: 1.Brett earns his income by repairing cars. 2.I enjoy playing the piano. 3.Her favorite pastime is entertaining friends. 4.She is successful in mimicking others' voices. 5.He must like studying ...

*April 5, 2012*

**POS2041**

Why are government policies on immigration so controversial?

*March 22, 2012*

**calculus**

I was doing calc hw and I am stuck on a part of a question. =(1/10)-(x/15sqrt(x^2-9)) I am supposed to put this equation equal to 0 and solve for x. The answer is 9/sqrt(5) but I don't understand how the answer comes out to be 9/sqrt(5). Please help. Thank you.

*February 25, 2012*

**chemistry**

In formula for where ferenheit and celsius converge (T = T x 9/5 +32); what is the logic that T x 9/5 = T + T = 4/5?

*January 24, 2012*

**geometry**

Gerrad is a painter. he is using a canvas that is in the shape of a regular hexagon. The perimeter of the canvas is 78 in. The perpendicular distance from a side to the center is 11 in. to the nearest inch. Based on these measurements, what is area of the canvas

*December 4, 2011*

**algebra**

find the average rate of change from (2,1) to (8,5) for f(x)=(4x^(2)-2x)/(6x)

*December 1, 2011*

**al gebr word problem MATH**

you go girl or boy

*October 26, 2011*

**math**

A store offers a 15% discount on all items in the store during a sale. All store employees get an additional 10% employee discount. In the equation below, C represents the cost of an item for an employee including tax, and x represents the original price of the item. C = 0....

*October 12, 2011*

**physics**

A rock accelerates 3m/s/s down a ramp. How long will it take for the rock to increase its speed from 2m/s to 17m/s down the ramp?

*October 6, 2011*

**Math**

1 1/2

*September 29, 2011*

**physics**

a plane stops from 250 mph in 25 seconds. Calculate the planes acceleration

*September 24, 2011*

**Algebra**

I need this answer in Scientific Notation please help 7.74x10^-4

*August 18, 2011*

**physics**

which one is angle will give the longest range ? 30 degrees ? 45 degrees ? 60 degrees ?

*July 12, 2011*

**calc2**

How do I find the continuous rate though?

*May 16, 2011*

**calc2**

At what constant, continuous annual rate should you deposit money into an account if you want to have $1,000,000 in 25 years? The account earns 5% interest, compounded continuously. Round to the nearest dollar.

*May 16, 2011*

**managerial eco**

A single price setting monopolist faces the demand : P = 4000-5Q, TC = 0 + 400Q. For the single price-setting monopolist, tell me profit maximizing quantity, price,total revenue, total cost, profit and consumer surplus.

*April 19, 2011*

**math**

On the fasted speedways, some drivers reach average speeds of 3 miles per minute. Write a formula that gives the number of miles M that such a driver would travel in x minutes. How far would this driver travel in 32 minutes?

*April 11, 2011*

**math**

k=1/2mv^2, for m V= h/e v- E/e, for e Please help.

*March 31, 2011*

**math**

solve: I=Prt, for P

*March 31, 2011*

**accounting**

Has this been answered

*March 2, 2011*

**math**

Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an infinite number of solutions. What is diffrent about these equations compared with the equations in the first question ( the equations were y=2x+3 and 5y-10x=5)? What is similar? ( include work to prove why and...

*February 24, 2011*

**math**

the first thing you do is divide 30000 with 100: 300 = 1% multiply it by seven to count the percentage 300x7 = 2100 multiply it by 4 to count the total via years 2100x4 = $8400 The answer is $8400 in total :)

*February 24, 2011*

**world history**

Renaissance contributed to the age of exploration by re-opening new trade routes in which increased the demand for foreign goods in europe. Sailor were willing to explore new lands not only to colonize but also for the wealth that awaited them. Also if they could find a direct...

*February 21, 2011*

**Precalc**

What is the degree of the following polynomial equation? (x+9)(x-5)(x+2)=0 1. 2 2. 3 3. 4 4. 5

*February 20, 2011*

**Math**

Draw two line segments connecting angles of the hexagon to make four quadrilaterals...

*February 17, 2011*

**Math**

A waffle cone has a width of 7.6 cm and height of 15.2cm and a chocolate coating that is 2mm thick. What is the volume of the chocolate coating? How many of these cones if they were filled up to the brim would be needed for 400 gallons of ice cream given 2 gallons is 0.01m^3? ...

*February 14, 2011*

**Math/Trig**

Write a polynomial of the smallest degree with roots 1, -3, and 4.

*February 11, 2011*

**geometry**

thank you sooo much damon :)

*January 27, 2011*

**geometry**

PLEASE HELP ME! i have this homework due tomorrow and i only have 1 question left and am sooo desperate for an answer: The diameter of the Dome of the Rock in Jerusalem is 20m. If it is plated with gold that is 5cm thick, find the cost of plating the dome in gold given that ...

*January 27, 2011*

**Math**

hey tills, i think its like this k? im unsure though.....: SA: (66x32)+ 2(1/2x63x32)+ 2(1/2x56x66):7824cm3 make a right triangle with 63 as the hypotemuse and 33 as the base. find the height from there then find the volume. to check its 3V/1024(this is 32x66)k? :)

*January 23, 2011*

**MATH**

omg tilla!! :D you totally helped. thankiess!!

*January 23, 2011*

**MATH**

Factorize the following : x4-x2-6 HELP!!!!!!

*January 23, 2011*

**MATH**

Factorize the following : x4-x2-6 HELP!!!!!!

*January 23, 2011*

**Math/Trig**

Solve: sin x - 2sin x cos x = 0 for 0 is less than or equal to x is less than 2pi.

*January 20, 2011*

**Math/Trig**

Solve: sin2 x = cos2 x for 0 degrees is less than or equal to x is less than 360 degrees.

*January 20, 2011*

**Math/Trig**

Solve: 2 sin x - 1 = 0 for 0 degrees is less than or equal to x is less than 360 degrees.

*January 20, 2011*

**Math/Trig**

Solve: 2 cos2 x - 3 cos x + 1 = 0 for 0 is less than or equal to x is less than 2pi.

*January 20, 2011*

**Math/Trig**

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.

*January 20, 2011*

**Math/Trig**

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.

*January 20, 2011*

**Math**

Area

*January 17, 2011*

**Math**

How do you find the height of a triangle ?

*January 17, 2011*

**Math/Trig**

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.

*January 17, 2011*

**Math/Trig**

it says to find the radius

*January 17, 2011*

**Math/Trig**

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.

*January 17, 2011*

**Math/Trig**

Find the area of the sector, given a central angle of 55degrees and a radius of 5.7 in. Round your answer to the nearest tenth.

*January 16, 2011*

**Math/Trig**

Find the length of the intercepted arc with radius 2.5 cm and a central angle of 95degrees. Round your answer to the nearest tenth.

*January 16, 2011*

**Math/Trig**

Find the angular velocity of an object, rotating on a circular object, moving through 9.7 revolutions in 11 seconds. Express your answer in rad/sec and round your answer to the nearest tenth.

*January 14, 2011*

**Math/Trigonometry**

radians please

*January 14, 2011*

**Math/Trigonometry**

What is the angular displacement of 1.6 revolutions? Round to the nearest tenth.

*January 14, 2011*

**Math/Trig**

The following is a table for the maximum temperature per month, for Boulder, CO Month|° F Jan:45.1 Feb:48.2 Mar:53.8 Apr:62.8 June:71.6 July:81.5 Aug:85.1 Sept:76.6 Oct:66.7 Nov:52.9 Dec45.5 Find the sinusoidal function that models this data. How do I do this ?

*January 14, 2011*

**Trigonometry**

Using the same equation from problem 1, what is the average temperature in Atlanta, GA, for the month of June? equation from #1 is y = 18.25 sin(pi/6 t - 2.09) + 61.15 where t is the time in months and January is t = 1.

*January 14, 2011*

**Math/Trig**

Thankyou!

*January 14, 2011*

**Math/Trig**

The average temperature, in °F, for Atlanta, GA is modeled by the sinusoidal function y = 18.25 sin(pi/6 t - 2.09) + 61.15 where t is the time in months and January is t = 1. What is the average temperature for the month of February? How do I do this problem ? Please Help

*January 14, 2011*

**Trigonometry/ Please Help**

Given sine of alpha=2/3 and cosine of alpha is less than zero, find the exact value of the other five trigonometric functions.

*January 13, 2011*

**Trigonometry**

Verify the identity: cos x + sin x tan x = sec x.

*January 13, 2011*

**Trigonometry/ Please Help**

Find two exact values of sin(cosˉ¹√5/6)

*January 13, 2011*

**Trigonometry**

Given sinθ=0.76, find θ in degrees to the nearest tenth.

*January 13, 2011*

**Math**

If sinθ=1/5 and θis in Quadrant I, find the exact value of 2θ.

*January 13, 2011*

**Math/Trigonometry**

Thankyouu

*January 13, 2011*

**Math/Trigonometry**

Find the exact value of cosθ if sinθ=-2/3, and θis in standard position with its terminal side in Quadrant IV.

*January 13, 2011*

**Trigonometry/ Please Help**

Thankyouuu!

*January 13, 2011*

**Trigonometry/ Please Help**

The average temperature, in °F, of City B is given by the equation:y=19.5sin(pi/6t-2.06)+62 , where t is the time in months and t = 1 corresponds to January. What is the average temperature in April? Round your answer to the nearest hundredth.

*January 13, 2011*

**math**

The rhombus is a parallelogram with four congruent sides. A square is a special case of a rhombus.

*January 13, 2011*

**math**

yes 26x90=2340

*January 13, 2011*

**math**

4, 6, 8, 9, 10, 12, 14, 15, 16, 18

*January 12, 2011*

**Math/Trigonometry**

Convert 2pi/3 radians into degrees.

*January 12, 2011*

**Help please Trig**

Given sinθ=0.76, find θ in degrees to the nearest tenth.

*January 12, 2011*

**Math/Trigonometry**

1. Solve: 2 cos² x - 3 cos x + 1 = 0 for 0 ≤ x < 2pi. 2. Solve: 2 sin x - 1 = 0 for 0° ≤ x < 360° 3. Solve: sin² x = cos² x for 0° ≤ x < 360° 4. Solve: sin x - 2sin x cos x = 0 for 0 ≤ x < 2p

*January 12, 2011*

**Math/Trig**

Find the length of the intercepted arc, given a central angle of 3pi/5 and a radius of 4.5 cm. Round your answer to the nearest tenth.

*January 12, 2011*

**Trigonometry**

Solve △ABC, given a = 4.4, b = 9.1, and c = 5.7. Round your answer to the nearest tenth.

*January 12, 2011*

**Trigonometry**

Find the area of a sector, given a central angle of 240° and a radius of 15 cm. Round your answer to the nearest tenth please.

*January 12, 2011*

**Trigonometry**

Determine sin x - tan x - sin x=0 for 0 ≤ x < 360°

*January 12, 2011*

**math math math math**

46

*January 10, 2011*

**Math**

3/2(4x-6)-x(3-x)=1/3x(3x-6)

*December 17, 2010*