Saturday

April 19, 2014

April 19, 2014

Total # Posts: 136

**chemistry**

Find the a)partial pressure of ethylene oxide and b)the total gas pressure, after 30 hours in a reaction vessel at 415C if the initial pressure of ethylene oxide is 782mmHg. k= 2.05x 10^-4 t(1/2)=56.3 Part A) I converted hours to seconds, and used the formula ln(Pa)t = 108000s...

**Math-simplify**

Can someone help me simplify this (2x/15)^2 / (.15-x/15)(.2-x/15) I end up getting this, 4x^2/x^2-17x+.003

**math**

what is the answer to this problem _3 125x6y3

**Significant figures**

78.08/100 x 748= How many significant figures should I use for the answer? 584.0 or 584?

**Chemistry**

There are two flask, one filled with a)ice bath, and b)boiling water. Ice bath: 1.00 L O^2(g) at STP Boiling water: 1.00 O^2(g) If we want the pressure to remain at 1.00bar when the O^2(g) is heated to 373K, what mass of O^2 must we release from the flask? I know that I should...

**chemistry**

If a gas is made up of 3 parts hydrogen and 2 parts nitrogen...how much percentage of hydrogen is the gas made up of? The answer says 60%, but I don't understand how the came up with the answer

**significant figures- chemistry**

I'm having trouble understanding significant figures. If a problem is requires two equations to finish, which of the original measurements do I use to figure out the significant figure? For ex. 3.001+4.32= 7.321. Then I use this answer for a different equation..for the fin...

**pharmacy compding**

how much active ingredient is needed to compound 18 lollipops if the formula is 5% active ingredient, 168g sugar,60ml Karo syrup (weighs 84g),60ml water. each lollipop should have 5% active ingredient

**Math**

I really need help with this question please Break-even equation. Fill in the blank. The following table contains selected data concerning several outpatient clinics in the new Ambulatory Care Center at Hope University Hospital. Fill in the missing information. A. PRICE PER VI...

**Math**

a bus travels 240 kilometers at 60 kph and then returns at 40 kph.. what is the average speed in kilometers per hour for the round trip?

**chemistry**

how much of 0.1 M NaOH is needed to neutralize 5mL of 0.1 M of HCL to a ph 7(color on the ph scale)...Thank you

**science**

5 mL O.1 M HCL...How much 0.1 M NaOH is needed to neutralize the acid? Thank you

**geometry**

if ab = 8 sc = 6 ec = 12 what is value of dc? it follows the (ac)(bc) =(ec) (dc) theorem tangents secants... thank you...do you have to factor?

**science**

32g of KCI OR KCIO3 IN 100ML OF WATER, AT WHAT TEMP WOULD IT BECOME SATURATED.. WHAT IF IT IS 37g? Thank you

**government**

five purposes of govt...protection,order,conflict resolution,econ. stabilty and public services....provide example of govt. that fulfills each purpose... I really dont about conflict resolution and econ. stability...Thank you

**math**

How will I know the equation of a sequence if it is not arithmetic nor geometric sequence?

**english**

can u give websites or how much the GERMAN pay taxes on education for colleges comare to USA

**english**

german policy on free education

**Algebra**

How do I solve 14x/5 + 7x = 23

**trogonometry**

A black bordering Sapphire St. is a right triangle. You start walking around the block, taking 125 paces on sapphire st. and 102 paces on Diamond st. a.) At what angle do Diamond and Sapphire Street Intersect ?

**Healthcare**

You are the manager of a variable hospital department and you just received your monthly budget results that state your salaries were higher and your supplies were lower than budgeted.

**novel let the circle be unbroken**

describe cassie logan based on events of chapter 1...her traits and flaws.. what flaws can you immediately detect..how does she feel about family and friends..cite examples from text

**geometry**

graph ABCD...is it a square...A(-3,1) B(1,4)C(4,0)D(0,-3) JUSTIFY YOUR ANSWER AND SHOW WORK..THANK YOU

**geometry**

graph ABCD...is it a square...A(-3,1) B(1,4)C(4,0)D(0,-3) JUSTIFY YOUR ANSWER AND SHOW WORK..THANK YOU

**Math**

Determine whether a regular decagon has reflection symmetry and/or rotational symmetry. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. Explain how you determined your answers

**physics**

We push a large box for three minutes. During that time, we exert a constant force of 200N on the box, but it does not move. How much work has been accomplished?

**physics**

a metal crate with a mass of 500 kg is pushed across a metal floor for 5 minutes.50N is applied horizontally.box does not move, extra 50 N is applied.after 2 minutes then box moves 4meters,how much work is done

**trig**

A plane is flying 12,000 feet horizontally from a tall, vertical cliff. The angle of elevation from the plane to the top of the cliff is 45degrees, while the angle of depression from the plane to a point on the cliff at elevation 8000 feet is 14degrees. Find the height of the ...

**chemistry**

what is mass

**Chemistry**

How many atoms are present in 1.25g of molecular hydrogen? I know the way to do it..but for molar mass, would it be 2.02g or 1.00g?

**advanced math**

solve: 2/y+2 = 3/y=-y/y+2

**Help! Science....**

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of clothes b. Different age...

**science... Help me urgent!!**

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of clothes b. Different age...

**Science**

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of clothes b. Different age...

**math**

A 10-item multiple choice test with 4 options (A,B,C,D) is given to a class in English, what is the probability that the student’s answers are of the same letters

**math**

12*30+ 890/2 equal?

**business**

what are the challenges of opening a business in two different countries?

**pre-calculus**

1.5

**Chemistry / Gas Law**

350.0 mg of an unknown gas effuses through a small hole into a 2.00 L flask. It effuses at a rate 1.27 times faster than sulfur dioxide at the same temperature, 20.0 degree C. What pressure would it exert in the 2.00 L flask?

**Chemistry**

It is possible, although less accurate, to do a standard addition with only one sample. An unknown Fe sample was analyzed by AAS and gave an absorbance reading of 0.160. To the same sample we added 1.5ppm Fe and the new absorbance reading was 0.205. Calculate the ppm of the un...

**social studies**

If I could be provided with some good qualitie questions to interview an elementary teacher,along with some guidance on writing the essay.

**American Government**

The answer is 3.) It pointed out racial problems in the South but ignored racial injustice in the North.

**Science**

Can anyone please suggest a food chain which includes a soldier crab starting from the sun (in a marine environment)?

**Biology**

What important role does the marine compost play in a marine ecosystem?

**Biology**

Give diffferences/contrast between a Marine environment and an estuarine environment.

**english**

u don't know english! go back to school

**chemistry**

What property of metals makes them good conductors of electricity?

**physics**

If the rotational speed of a platform is doubled, how does the linear speed anywhere on the platform change?

**Physics**

A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction. After the throw the hammer moves off in one direction while the student moves off in the other direction. Which of the following correctly describes the above situation? The answe...

**Math**

Oops, I mean 10^-4*90x/10^-4+6x.

**Math**

Fined the derivative of 10^-4*90/10^-4+6.

**college physics**

cost of homework help for college physics

**Business**

Consider the following statement: Most disagreements or differences of opinion are more often a result of faulty, misunderstood, or confusing premises, rather than faulty reason from a valid premise. Would you agree or disagree with this statement? Explain. What are some reaso...

**physics**

A ball is thrown upward from the top of a 24.4-m-tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 30.2 m from the building. What must be the average speed of the person if he is to catch the ball at ...

**trigonometry**

a kite has 120 m of string attached to it when it flies at an elevation of 5 degrees. How far is it above the hand holding it? ( assume that the string is taut)

**trigonometry**

a ladder which is 5 m long leans against a nail on the wall.it makes an angle of 62 derees with the ground. find the height of the nail above the ground and the distance of the foot of the ladder from the wall.

**trigonometry**

at a point 27 m from the front of a pole, the angle of elevation of the top of the pole is 53. find the height of the pole

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.

**Math**

you roll a number cube, what are the odds in rolling a 1 or 4?

**The world History**

did any one help u with your world history?

**math**

.the perimeter of a rectangle is 30 m more than three times its width. if the perimeter is 84 m, find the length and width of the rectangle.

**chemistry**

using the balanced equation for the fermentation reaction, calculate for the theoretical amount of alcohol to be produced using 10 grams of sucrose. 0.79 g/ml is ethanol's density.

**t test**

A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The hearing ability scores (high numbers indicate grea...

**t test**

a chart

**t test**

What is the power of each of the following studies, using a t test for dependent means (based on the .05 significance level

**calculus**

(1 pt) A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 15 dollars, the company sells 132 units per week. When the price is 27 dollars, the number of DVDs sold decreases to 84 units per week. Answer the...

**calculus**

(1 pt) A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 15 dollars, the company sells 132 units per week. When the price is 27 dollars, the number of DVDs sold decreases to 84 units per week. Answer the...

**physics**

25.6 m

**Chemistry 2**

How many grams of O2 will dissolve in 2.50L of H2O that is constant with pure O2 at 1.00atm?

**physics**

a stone is dropped from the rooftop of a building 60.0 m high.how many seconds does the stone take reach the ground?

**investing**

4500

**investing**

4500- the amount sold for

**investing**

12500-9750=2750 what it is worth -4500 what is was sold for = gain of 1750

**sorry, the first question isnt showing up properly**

, its suppose to be 5^squarerootx / x

**Derivatives- Math**

Can someone explain how to find the derivative of : 1. y= 5^ãx / x And the second derivative of: y= xe^10x For this question I got up to the first derivative and got this y = e^10x + 10xe^10x but I can't seem to get the correct answer for the second derivative.

**algebra**

3(q+1)-9=23 3q *3-9=23 3q*3 -9+9=23+9 I am not sure what to do with the 3 I think that I am suppose to add 23+9 on the right side. this is where I get confused.

**algebra**

-3/4z-2/3=1/3

**algebra**

thank you

**algebra**

3(q+1)-9=23

**algebra**

Two numbers differ by 6 and have a product of -9.

**algebra**

the length of a rectangle, given that its width is w feet and its length is 3 feet shorter than twice the length.

**Roman Empire**

your just stupid

**chemistry**

How many moles of methane occupy a volume of 2.00 L at 50.0 degrees C and 0.500 atm? What formula do I use and how do I get it to moles??

**math**

Find the vertex of the parabola. y = -4x2 - 16x - 11

**math**

Simplify. (82 - 60) + [(-3 x 4) - 36÷4]

**math**

A cyclist completes 3.2 cycle revolutions in 1.4s. What is the angular velocity in radians per second?

**7th grade math**

Dave scored 2 under par (-2) each day of the 4 days of the golf tournament. Express as an integer how many strokes he finished under par.

**Biology**

Thank you !

**Biology**

Will this answer be correct? Schizophrenia is not deadly, but the effects of a schizophrenic episode may turn deadly.

**Biology**

How virulent is the disease schizophrenia? Can someone help me with answering this question? I do not understand what they are asking.

**Help on Focus Statement for Report**

Could I change that focus statement to: By analzing the repeating elements found in an archetypal quest, it will be made apparent that the movie, Saving Private Ryan, follows the archetypal design. btw, Thanks for your help! (:

**Help on Focus Statement for Report**

Is this written correctly? I wrote this for my focus statement on a report I am currently writing. Please double check. Thank you~! In this report, I will justify why the movie Saving Private Ryan follows the Archetypal design by analzing the repeating elements which one would...

**English Macbeth- Help please asap**

Could this be considered an oxymoron in Macbeth? "Yet who would have thought the old man to have so much blood in him” TIA.

**math help**

Could someone tell me how to find the inverse of g(x)= x^2-5x-6

**Question**

hi, so i just made a model of an aspirin tablet,and i was wondering if anyone could give me an estimate on how many grams it would be? The diameter is around 23inches. it doesnt have to be exact, i just need a guess. thanks

**math**

Sally invests some money at 6%/a compounded annually. After 5 years, she takes the principal and interest and reinvests it all at a 7.2%/a compounded quarterly for 6 more years. At the end of this time, her investment is worth 14,784.56.how much did sally originally invest? I ...

**Gr.11 Math**

Use the formula Sn = a(r^n-1) -------- r-1

**Math- Check over please**

but is there any way i can apply that to the formula given?

**Math- Check over please**

A ball is dropped from a height of 3m and bounces on the ground. At the top of each bounce, the ball reaches 60% of it's previous height. Calculate the total distance travelled by the ball when it hits the ground the fifth time. Could you please check over my answer? Sn= a...