Friday
December 19, 2014

Posts by tasha


Total # Posts: 306

chemistry
i calculated n from pv=nrt but, when i divided it into 40.4 g of c5h12, i got the molar mass of the compound with is around 72. after that, i had no idea what to do
January 17, 2010

chemistry
A 40.4 g sample of a gas with the empirical formula C5H12 occupied a volume of 3070 mL with a pressure of 5016.0 torr at 168 °C. Enter the molecular formula of the compound.
January 17, 2010

Chemistry
You have 2.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water is found to be 102.0 g. The mass percent of A in this solution is
January 14, 2010

algebra
You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. a)Write an inequality that demonstrates how much money you will be willing to spend on the project.
December 14, 2009

math
Find a rational number between 1/8 and 2/4
December 14, 2009

math
Order each of the following decimals from greatest to least: a)1.4519, b)1.4519, c)1.4519, d)1.4519, e)-0.134, f)-0.13401, g)0.13401 For this one there lines over these numbers a)519 b)9 c)none d)19 e)none f)401 g)401
December 13, 2009

math
Paul read 20 pages of a book in 15 minutes. (a) What is Paul’s reading rate of pages per minute? (b) If he continues to read at the same rate, how many pages will he read in 1 hour?
December 8, 2009

National Deploma Graphics
What are the changes between realisum and abstraction in Europe ?
November 19, 2009

physics
It is greater than 150 N
October 9, 2009

SOCIAL STUDIES
without our two great political parties cutting acrOSS ECONOMIC AND GEOGRAPHIC INTEREST, DEMOCRACY AS WE KNOW IT COULD NEVER HAVE BEEN MADE TO FUNCTION, THE AUTHOR OF THIS STATEMENT PROBABLY MEANT?
October 6, 2009

Algebra 1
13/18 divided by 20/27
October 6, 2009

math
x^4y^2 when x=5/6 and y = -3/5 pls help .. i dont get this
September 27, 2009

scince
how many milligrams are in one oz
September 16, 2009

history
in what ways does Magna Carta still impact laws
August 10, 2009

anthropology
i am sorry are there links and where can i find it in culutural anthropology
August 4, 2009

anthropology
There are anthropological links between social science and natural science
August 4, 2009

history
What was the role of the Mayflower Compact in creating the New Plymouth society?
August 3, 2009

history
so i dont unerdstand then how were there differences important to the international state of affairs in 1450?
August 3, 2009

history
so i dont unerdstand then how were there differences important to the international state of affairs in 1450?
August 3, 2009

history
how were the differences from north america, asia, eurasia, and europe important to the international state of affairs in 1450?
August 3, 2009

Health
I know how treatments have changed but we are talking about paying for them. How was health care payed for back in the old days. The only method of payment I can think of is giving the physician some meat, or grain.
June 18, 2009

Health
It refers to the doctors
June 18, 2009

Health
I need help with this question. I need some more help please. How has healthcare providers eveolved over time. The only thing that i can think of is treating the patient and receiving something that they have such as meat, or grain.
June 18, 2009

mathematics
Squareroot of (0.0256/25) giving your answer in standard form. Is the ans (0.0256/25)= 0.001024 Squareroot of 0.001024 = 0.032
June 13, 2009

HEALTH
I don't think that mileage should be included, other test and treatments should be those treatments could prevent a illness. I don't think anybody should be denied anything that would help them remain healthy, in good condition, and to live a longer life.
June 11, 2009

HEALTH
I think that there should not be limits on the amount of health care provided because the proper treatment is necessary. I feel that everyone should be obligated to received health care help as often as needed for there safety and precautions. When the amount of health care is...
June 11, 2009

HEALTH
What do you see as the purpose of health insurance? Should there be limits on the amount of health care provided? If yes, what criteria should we use to ration health care? If no, how should health care be financed so that everyone has access?
June 11, 2009

History
These web site sights didn't help
April 30, 2009

History
were can I find information about this question? The exploration and settlement of the American continents by Europeans initiated contact between Europeans, Native Americans, and slaves brought from Africa. How did these diverse interactions affect each group? Which group do ...
April 30, 2009

math
a bin contains seven red chips, nine green chips, three yellow chips, and six blue chips. Whats the probability od drawing a red chip, replacing it, then drawing a blue chip
March 15, 2009

math
a bin contains seven red chips, nine green chips, three yellow chips, and six blue chips. Whats the probability od drawing a red chip, replacing it, then drawing a blue chip
March 15, 2009

us history
What is the International State of Affairs of 1450?
March 4, 2009

Algebra
Thank you sooo much!
March 2, 2009

Algebra
40=-0.2x+45 i cant seem to solve this problem.
March 2, 2009

math-help solve please
how did you get (.035)
February 19, 2009

math-help solve please
find out how long it takes a $2700 investment to double if it is invested by 7% compounded semiannually. Round to the nearest tenth of a year . Use the formula A=P[1+r/n]^nt
February 19, 2009

geology
Can you answer this please? What kind of climate coincides with the old Cotton Belt in the United States? How would you characterize it? The U.S. Corn Belt coincides approximately with Dfa climate, which is assigned what name in the North American climate map in your textbook...
February 8, 2009

7th grade
can there be a prepositin in the subject
February 5, 2009

Math
531 miles on 27 gallons
November 17, 2008

algebra
-2/17 + p = -2/15
October 23, 2008

algebra
42xy/54xy
October 23, 2008

Algebra
find the equivelent of -d(-69)
October 23, 2008

algebra
x/6=-10 what does x stand for and I need help with 10t + t + 4/9t what is the value of t
October 23, 2008

com 150 week 6
body parsgraphs and topic outline and working references list check point
October 8, 2008

com 150
brainstorming and brain mapping
October 8, 2008

Algebra
Can someone please help me??!!! i dont get this at all!! can you explain it step by step please? :) Ellen and Allen have a lemonade stand. One sixth of their earnings E must be used to pay for supplies for the next day. Each child then gets to keep half of the remaining money...
September 18, 2008

algebra
Jim is able to sell a hand-carved statue for $670 which was a 35% profit over his cost. How much did the statue originally cost him?
September 12, 2008

Math
Thanks Bob!
September 4, 2008

Math
Writing to Explain: Which is greater, the greatest whole number with 5 digits or the least whole number with 6 digits?
September 4, 2008

Microeconomics
You have this chart of combinations of clothing and food. You have to find the marginal opportunity cost and the total cost of producing the second unit of clothing. And then same for the third unit of clothing. Clothing: 4 3 2 1 0 Food: o 7 13 18 22
August 28, 2008

Wi-yu tea
HAve anyone tried the wi-yu tea? does it works? any side effects?
August 23, 2008

The Human Body
should i try the wi-yu tea to help me lose weight?
August 23, 2008

HCA 240
Write a 150- to 200-word script for a radio ad that promotes a healthy musculoskeletal system in old age. Address the risk factors for: arthritis, osteoporosis, injuries from falls. Incorporate prevention strategies such as: proper nutrition (calcium, diet) Don't need any ...
August 14, 2008

HCA 240
Sara loved to run. Sha watched the track meets at school even as a first grader. An asthmatic. She occasionally had to use an inhaler, but seemed determined to be an athlete. SHould Sara be discouraged from pursuing her goal?
August 8, 2008

ecology
Identify a viewpoint given in the video that highlights the importance of biodiversity. Do you believe that every species is connected to one another as expressed in the video? Why or why not?
July 1, 2008

Substitution method to solve system of equations
y - 2x = -5 3y - x = 5 Please help me out.
May 20, 2008

Physics
An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?
April 28, 2008

Physics
An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and the temperature raised to 30.5°C, what will be the pressure of the gas? Pa I was able to get 173.81...
April 28, 2008

Physics
I'm getting 1.415*10^27, but my homework is telling me its wrong. Isn't Avogadro's number 6.022*10^23
April 28, 2008

Physics
A runner weighs 560 N (about 130 lb), and 74% of this weight is water. (a) How many moles of water are in the runner's body? moles (b) How many water molecules (H2O) are there? molecules I was able to get part (a), but I'm not sure how to get part (b)
April 28, 2008

Physics
I'm not sure what that is.
April 28, 2008

Physics
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? Can anyone help me work this problem?
April 28, 2008

Physics
Three moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 430 to 160 K. (a) What is the work done by (or done to) the gas? Include the algebraic sign. J (b) What is the change in the internal energy of the gas? Include the algebraic sign. J
April 20, 2008

Physics
An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and the temperature raised to 30.5°C, what will be the pressure of the gas? Pa
April 20, 2008

Physics
In an automatic clothes drier, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.39 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of above the ...
April 3, 2008

Physics
A child is twirling a 0.0116 kg ball on a string in a horizontal circle whose radius is 0.102 m. The ball travels once around the circle in 0.560 s. (a) Determine the centripetal force acting on the ball. N (b) If the speed is doubled, does the centripetal force double? yes no...
April 3, 2008

Physics
A car travels at a constant speed around a circular track whose radius is 2.5 km. The car goes once around the track in 430 s. What is the magnitude of the centripetal acceleration of the car?
April 2, 2008

Geometry
Thanks! I've been working on that problem like.. all morning.
January 18, 2008

Geometry
Can the Isosceles Triangle Theorem be written as a biconditional? If yes, rewrite it as one, if no, explain why not.
January 18, 2008

environmental science
If you were an environmental researcher and were given funding to assist with one environmental issue, which one of the following topics would you choose to spend your funds on? · Human Population · Atmospheric Pollution · Water Resources · ...
January 14, 2008

Math - 3rd grade
Writing to Explain: Which is greater, the greatest whole number with 5 digits or the least whole number w/ 6 digits?
January 7, 2008

US Gov
Whay is a congressional support agency and what is its function?
January 2, 2008

lit
Well I am African American and I live in the U.S.
December 13, 2007

lit
o Do members of your community look like you? In what ways do they look the same or different? o How do leaders within your community treat people who are like you? How do they treat people who are different? o How do other members of your community treat people who are like ...
December 13, 2007

Eth
o Do members of your community look like you? In what ways do they look the same or different? o How do leaders within your community treat people who are like you? How do they treat people who are different? o How do other members of your community treat people who are like ...
December 13, 2007

PHYSICAL SCIENCE
If mecury is 13.54 g/cm3, and you need 40 gm of mercury. What volume of mercury do you need?
December 7, 2007

Physical Science
Why is the net charge of the nucleus always positive?
November 29, 2007

Physical Science
If you are given the density and the mass, how do you get the volume?
November 29, 2007

US Government
Which branch has the strongest voice in making foreign policy?
November 28, 2007

Physical Science
Thank You
November 28, 2007

Physical Science
How do you calculate mass? If you are given density and volume.
November 28, 2007

college physics
i just need to know if i got the right answer. plz thankyou a 15000N car on a hydrolyic lift rests on a cylinder with a piston of radius 0.20M,. if a connecting cylinder with a piston of 0.04M radius is driven by compressed air, what force must be applied to the smaller piston...
November 13, 2007

physics
a 15000N car on a hydrolyic lift rests on a cylinder with a piston of radius 0.20M,. if a connecting cylinder with a piston of 0.04M radius is driven by compressed air, what force must be applied to the smaller piston in order to lift the car? am i doing this right? (0.04M / 0...
November 12, 2007

Maths
This is part of the indices section, how do you work it out please: (8/27) to the power of 2/3
September 16, 2007

ETH 125
what do i have to write about..
July 3, 2007

physics
A 1.3 Kg block of ice is initially at a temp of -5 degrees celsius. If 7.5 *10^5 J of heat are added to the ice, what is the final temperature of the system? I multiplied 1.3 Kg of ice by the specific heat of ice (2090), then I divided by the amount of heat added. I came up ...
June 22, 2007

physics
At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between approaching and receding cars. Suppose the sound of a certain car drops by a factor of 2.40 as it goes by on the straightaway. How fast is it ...
June 18, 2007

physics
A bicyclist traveling with speed v=3.3 m/s on a flat road is making a turn with a radius r=8.6 m. The forces acting on the cyclist and cycle are the normal force (FN) and the friction force (Ffr) exerted by the road on the tires, and mg, the total weight of the cyclist and ...
June 9, 2007

math, help
9/5·y=36/5
May 21, 2007

grammar prep.phrase
ye of is the prep n flower is the op gud job
March 29, 2007

Chem
I'm pretty sure this should be a fairly simple conversion factor problem, but I'm getting bad results. I want to go from molarity (mol/L) to density. Based on simply unit analysis, I figured that I could go in this direction: mol/L x g/mol x L/mL = g/mL With the ...
March 22, 2007

Chem
Choose the member of each set that you would expect to be more soluble in water. Explain your answer. Chloroform, CH3Cl, or hydrogen chloride. My gut instinct was HCl, however I'm not sure why [or if] it's more soluble than CH3Cl. Of course HCl is more soluble in water...
March 20, 2007

Chem
Why -OH groups readily soluble in water? If the hydrogen bonds are relatively strong, shouldn't they be less soluble? The OH^- ion is polarized. Water molecules are polarized. Like dissolves like.
March 20, 2007

science
How long will it take a 1000-kg car with a power output of 20 kW to go from 10m/s to 20 m/s? Ignoring friction, the change in kinetic energy has to equal Power*time
February 19, 2007

science
Which of these energies might correspond to the KE of a person riding a bicycle on a road? 10 J; 1 kJ; 100kJ KE is 1/2 mv^2. Take your mass (weight in lbs/2.2), divide by two, take a typical speed say 10mi/hr or 6.6km/hr or 5m/s, square it, and do the math.
February 19, 2007

science
A crane whose motor has a power input of 5.0 kW lifts a 120-kg load of bricks through a height of 30m in 90s. what is the efficiency of the crane, which is the ratio between its output power and its input power.
February 19, 2007

science
the acceleration of gravity on the surface of Mars is m/s squared. if an astronaut in a space suit can jump upward 20cm on the earth's surface, how high could he jump on the surface of Mars? You need to provide a number for the acceleration of gravity on Mars, which I will...
February 19, 2007

science
How much work is needed to raise a 110-kg load of bricks 12m above the ground to a building under construction? According to the law of conservation of energy, the work required equals the change in potential emergy. To get the increase in potential energy, multiply the weight...
February 19, 2007

science
What is the speed of an 800-kg car whose KE is 250 kJ? Use the formula KE = (1/2) M V^2 Rearrange it to solve for V. You'll need to take a square root along the way.
February 19, 2007

science
the potential energy of a golf ball in a hole is negative with respect to the ground. Under what circumstances(if any) is the ball's kinetic energy negative? Its rest energy? The kinetic energy of the ball is zero when it isnt moving, whether it is ion the hole or not. ...
February 19, 2007

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