Monday
April 21, 2014

Posts by mae


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.

4th grade Math
32

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...

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