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March 27, 2015

Search: 0.65 of argon gas is admitted to an evacuated 60 container at 60 . The gas then undergoes an isochoric heating to a temperature of 500 .

Number of results: 23,577

PHYSICS
1..........At what temperature of 0^C steel rod & copper rod have length of 800.1cm and 99.9cm respectively. At what temperature will the 2 rods have the same length. Coefficients of linear expansion (per C) copper rod----.000017 steel rod-------.000012 2.....The length of a ...
March 14, 2011 by eissa

Chemistry
I have 2 questions on columns used in the Gas Chromatography-Flame Ionisation Detector (GC-FID) instrument: - 1) If a capillary column is left in the GC-FID instrument for 2 months with the instrument switched off (i.e. instrument is not in use),will this affect the ...
March 25, 2012 by mandy

Geology
The warmest temperature occurs when? and why does the warmest daily temperature occur in mid-to-late afternoon rather than at the time of the highest sun angle?
March 9, 2009 by Pepper

Science
What are some abiotic changes that might occur if the temperature of the tundra increased. The exact temperature doesn't matter, just enough to change the tundra.
April 6, 2009 by Sam

physics
A spherical steel ball bearing has a diameter of 2.540 cm at 23C. (a) What is the diameter when its temperature is raised to 106C? (b) What temperature change is required to increase its volume by 0.8%?
November 30, 2009 by Kim

chemistry
Consider a room temperature 0.30M ammonia buffer at pH 9.5. As you raise the temperature of the buffer, would you expect the pH to change? Explain. (Pka of NH4+ is 9.26)
March 7, 2010 by julie

chemistry
Consider a room temperature 0.30M ammonia buffer at pH 9.5. As you raise the temperature of the buffer, would you expect the pH to change? Explain. (Pka of NH4+ is 9.26)
March 7, 2010 by julie

chemistry
105 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.3, what is the mass of the steel bar?
February 26, 2011 by shannon

PHYSICS
A bottle containing 4 kgof water at a temperature of 15Cis placed in a refrigerator where the temperature is kept at 2C.How much heat is transferred from the water to cool it to 2C?
March 18, 2013 by B

math
Room temperature ranges from 20^C to 25^C. Find the range of the room temperature in ^F. Use the formula F-32=1.8C to convert from the Celsius to the fahrenheit. (just need to know how to set this up)
January 8, 2014 by Anonymous

Chemistry
The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
April 30, 2014 by Sha

Chemistry
The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) -> CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
May 1, 2014 by Shana

chemistry
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g
May 8, 2014 by treasa

PHYSICS
1..........At what temperature of 0^C steel rod & copper rod have length of 80.1cm and 99.9cm respectively. At what temperature will the 2 rods have the same length. Coefficients of linear expansion (per C) copper rod----.000017 steel rod-------.000012 2.....The length of a ...
March 14, 2011 by eissa

physics
A 0.250-kg aluminum bowl holding 0.800 kg of soup at 27.0C is placed in a freezer. What is the final temperature if 430 kJ of energy is transferred from the bowl and soup? Assume the soup has the same thermal properties as that of water, the specific heat of the liquid soup ...
April 21, 2014 by logan

Accounting
Use the following adjusted trial balance of Webb Trucking Company to prepare a classified balance sheet as of December 31, 2005. 4-4 Account Title Debit Credit Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 7,000 Accounts receivable...
September 8, 2009 by Robin

Chemistry
5. Explain the difference between a galvanic (voltaic) cell and an electrolytic cell. For a reaction in a galvanic cell, change in S is negative. Which of the following statements is true? Defend your answer. a."E"willncrease with an increase in temperature. b."E"will decrease...
April 26, 2012 by Ryan

physical science
A Weather balloon carries instruments that measure temperature, pressure, and humidity as it rises through the atmosphere. Suppose such a balloon has a volume of 1.2 m3 at sea level where the pressure is 1 atm and the temperature is 20oC. When the balloon is at an altitude of ...
October 4, 2012 by maria

Socials--no sites.
What happened on April 1st, 1999? Why is this significant? On April 1st 1999, the NorthWest Territories were split in two. This was so significant because it's what created Nunavut and the Western Territory. What does this area have for resources? For resources it has large ...
April 25, 2011 by Anonymous

Chemistry
Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in a AgNO3 solution. The two electrodes are ...
May 12, 2014 by TP

Chemistry - Science (Dr. Bob222)
Liquid chloroform (CHCl3) is placed in a closed container and allowed to equilibrate with chloroform vapor. With the temperature held constant, additional chloroform is introduced into the system, and the vapor-liquid equilibrium is reestablished. Following this, the ...
May 10, 2014 by Ana

nutrition
How many grams of nitrogen are contained in a 2,500 kcal diet that provides 15% of the energy as protein? What would be the approximate weight gain of a person who consumes an excess of 500 kcal daily for one month? Which of the following is an FDA approved over-the-counter ...
July 2, 2011 by allison

Nutrition
How many grams of nitrogen are contained in a 2,500 kcal diet that provides 15% of the energy as protein? What would be the approximate weight gain of a person who consumes an excess of 500 kcal daily for one month? Which of the following is an FDA approved over-the-counter ...
July 4, 2011 by allison

Physics
The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (a) A ...
April 20, 2008 by Johnson

chemistry
luminum oxide is an important starting material for making cryolite, Na3AlF6 (a compound used to give fireworks their yellow colour). First the aluminum oxide is synthesized from aluminum and then reacted with sodium hydroxide and hydrogen fluoride gas. If 2.6 Mg of aluminum ...
October 2, 2014 by tj

Electron transition
The electron in a hydrogen atom in level n= 8 undergoes a transition to a lower leve by emitting a photon of wavelength 956 mom. What is the final level of the electron? A) 4 B) 8 C) 9 D) 1 E) 3
October 8, 2014 by Maria

Math
Beginning with a tank containing 8075 gallons of gasoline, more gas is added at a rate of 5 gallons per minute, while alcohol is added at a rate of 10 gallons per minute. When the mixture is 10% alcohol, how many gallons of the mixture are in the tank? Is there an easier way ...
March 1, 2008 by Anonymous

Chemistry
I really don't get this. The calculations shown don't make sense. Demonstrate that work is not a state function by calculating the work involved in expanding a gas from an initial state of 1.00: and 10.0atm of pressure to (a) 10,0 L and 1.0 atm pressure. (b) 5.00L and 2.00 atm...
November 28, 2008 by Xi

math
Beth and Lewis buy the same amount of fish pellets. If Beth feeds her goldfish 14 fish pellets each day, a container of pellets will last 20 days. If Lewis feeds his goldfish 8 fish pellets each day, how many more days will the container of pellets last Lewis' goldfish?
November 5, 2014 by Carla

Physics
A helium-neon laser emits light of wavelength 633 nanometers(nm). Light from an argon laser has a wavelength of 515 nm. Which laser emits the higher-frequency light?
February 22, 2008 by Shirley

physics
. A proton is released from rest at point A in a uniform electric field that has a magnitude of . The proton undergoes a displacement to point B in the direction of . Calculate the speed of the proton after completing the displacement.
December 16, 2014 by salem

Chemistry Q1,3,5
1) What would be the preferred heating device (s) in each of the following situations? a) reflux a solvent with a 56 degree Celsius boiling point b) reflux a solvent with a 110 degree Celsius boiling point c) distillation of a substance that boils at 220 degree Celsius 3) What...
December 5, 2013 by Laila Plz help me out

Chemistry
Consider the gas-phase equilibrium A ⇌ B. In a series of experiments, different initial amounts of A and B are mixed together, and the mixture in each case is allowed to come to equilibrium. Which one of these experiments would yield values for the amounts of A and B ...
March 8, 2010 by Val

chemistry
One of the reactions involved in the smelting of copper sulfide ores involves copper(I) oxide and copper (I) sulfide: 2Cu2O(solid) + Cu2S(solid) ---> 6Cu(solid) + SO2(gas) Assuming that 35.00 g of copper (I) oxide is heated with 25.00 g of copper (I) sulfide. a) Determine ...
December 6, 2014 by Anonymous

Chemistry
Is this done right? White phosphorous, P4, spontaneously bursts into flame in Oxygen gas. if 6.5 g of white phosphorous reacts completely with oxygen to form 11.54g of a phosphorous oxide, what is the empirical formula of this oxide? this is what i did: total = 11.4 g , P4 = 6...
December 13, 2012 by Anya

regression
You have heard about but never took seriously the Old Farmers Almanac claim that you can tell the temperature of the air by counting the number of cricket chirps in 1 minute. You decide to test the claim so one night when the temperature was 76 degrees you counted the number ...
September 23, 2011 by donna

Math/Euler's Method
Consider a cooling cup of coffee whose initial temperature is 205. The room temperature is held at 70. Suppose k = 1/16. Let y be the temperature, and y' its time derivative. ----------------------------------- I have the differential equation: y' = (-1/16)(y-70) Initial ...
June 7, 2007 by COFFEE

science
Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.250 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
April 29, 2013 by samantha

Chemistry
Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.200 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
October 7, 2013 by Connor

chemistry
I want to make sure I am correct in classifying whether the following properties of hydrogen are chemical or physical. thanks 1. hydrogen will burN in in oxygen to form water. CHEMICAL 2. hydrogen does not support combustion. CHEMICAL 3.hydrogen is usually found combined with ...
April 8, 2014 by david

math
A dealer offers a computer software program whose list price is $500 at a 19% discount. She will give an extra 3% discount if paid in cash. What is the selling price if payment is made in cash? If 500=81%, _____=78% (this comes from subtracting 19% from 100%, then subtracting ...
December 16, 2008 by laura

Economics
. Suppose the demand curve for a monopolist is QD =500 - P, and the marginal revenue function is MR =500 2Q. The monopolist has a constant marginal and average total cost of $50 per unit. a. Find the monopolists profit maximizing output and price. b. Calculate the ...
August 23, 2012 by Michelle

Chemistry
Why is heating required for this formation: 6NaOH (aq) + Al2(SO4)3 (aq) 2Al(OH)3 (s) + 3Na2SO4 (aq)? Wouldn't freezing favour the formation of Al(OH)3 since freezing lower the KSP and more Al(OH)3 would precipitate?
March 22, 2010 by Alan

Chemistry
While heating two different samples of water at sea level, one boils at 102C and one boils at 99.2C. Calculate the percent error for each sample from the theoretical 100.0C.
June 19, 2012 by Carley

Algebra
A manufacturing company has determined that the cost of labor for producing x transmissions is: L(x) = 0.3x^2 + 400x + 550 dollars, while the cost of materials is M(x) = 0.1x^2 + 50x + 800 dollars. Need to write a polynomial T(x) that represents the total cost of materials and...
November 13, 2009 by Janet

Algebra
A manufacturing company has determined that the cost of labor for producing x transmissions is: L(x) = 0.3x^2 + 400x + 550 dollars, while the cost of materials is M(x) = 0.1x^2 + 50x + 800 dollars. Need to write a polynomial T(x) that represents the total cost of materials and...
November 13, 2009 by Janet

Algebra
A manufacturing company has determined that the cost of labor for producing x transmissions is: L(x) = 0.3x^2 + 400x + 550 dollars, while the cost of materials is M(x) = 0.1x^2 + 50x + 800 dollars. Need to write a polynomial T(x) that represents the total cost of materials and...
November 13, 2009 by Janet

algebra
The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature, F af 40 760 60 1600 ...
October 25, 2014 by Jesse

chemistry
Twisted nitinol-wire eyeglass framed unbend at room temperatures. Is the transition temperature of the frames above or below room temperature? Thanks in advance
April 10, 2009 by Angeline

physics
A 240 g ice cube at -10 C is placed in an aluminum cup whose initial temperature is 70 C. The system comes to an equilibrium temperature of 20 C. What is the mass of the cup?(answer in kg)
December 2, 2009 by ana

Statistics
Assume the body temperature of healthy adults are normally distributed with a mean of 98.2 degrees F and a standard deviation of .62 degrees F. If you have a temperature of 99.0 what is your percentile score?
November 16, 2010 by Lisa

chemistry
If I make an ice pack with 750mL of water, what mass of ammonium chloride must I include to get the temperature to drop from room temperature (20 degrees C) to 5 degrees C?
November 17, 2010 by Cody

Chemistry
If all of the energy from a 60-watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?
December 7, 2010 by Karmelo

Chemistry
If all of the energy from a 60-watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?
December 8, 2010 by Karmelo

math
9/10x5/6x8/9 =? would that be 6/8 ? also the temperature ranged from -37 F to 103 F How many degrees was the temperature for the year? would you just take the difference between the two?
April 4, 2011 by jill

Physics
Let's say I put a very hot 100o C, 41 g cube of aluminum in 71 ml water at room temperature (20o C). What is the temperature of the water after equilibrium occurs
April 25, 2011 by sonia

PHYSICS
A person with skin area 2 m2 and 0.97 radiation efficiency is at rest and has a skin temperature of 28 C in an environment with a uniform temperature of 22 C .Calculate the heat loss rate in watts
August 18, 2011 by KAIT

PHYSICS
A person with skin area 2 m2 and 0.97 radiation efficiency is at rest and has a skin temperature of 28 C in an environment with a uniform temperature of 22 C .Calculate the heat loss rate in watts
August 18, 2011 by KAIT

physics
a. A person with skin area 2 m2 and 0.97 radiation efficiency is at rest and has a skin temperature of 28 C in an environment with a uniform temperature of 22 C Calculate the heat loss rate in watts
August 18, 2011 by KAIT

physics
a. A person with skin area 2 m2 and 0.97 radiation efficiency is at rest and has a skin temperature of 28 C in an environment with a uniform temperature of 22 C Calculate the heat loss rate in watts
August 18, 2011 by KAIT

Science
On a winter day the temperature drops from 15C to 25C overnight. If a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?
September 28, 2012 by KeKe

physics
How much heat ( In calories)is needed to warm 200 grams of water from an initial temperature of 24 degrees celsits to a final temperature of 84 degrees celsuis
September 24, 2013 by teresa

chemistry
When methanol undergoes complete combustion, the products are carbon dioxide and water. 2CH3OH (l) + 3O2(g) --> 2CO2(g) + 4H2O (g). How much water ( in grams) can you maximally produce if you burn 50g of methanol? In real experiment, you isolate 10 mL of water (d=0.98 g/cm3...
March 22, 2010 by Monica

PHYSICS
An object undergoes simple harmonic motion. During that motion the object needs 1.1 seconds to reach one point of zero velocity from the previous such point. If the distance between those points is 0.3 m, calculate the period.
April 7, 2011 by Unknown

math
The temperature at 8:00pm is 32 degrees. If it dropped 3 degrees per minute, what is the temperature at 8:30pm
April 18, 2012 by kathy

Advanced Math
At 9:00 a.m. the temperature was -4 degrees. It rose 35 degrees during the day. What was the new temperature
November 12, 2014 by Carol

science
I see others have asked the same question but I do not understand the answers given. Question is to do with zinc solid and dilute sulphuric acid. What substance is left? I see by other posts that Bob Pursley answered this question. I haven't seen his answer but here is a hint...
October 15, 2006 by teddy

chmistry
When 0.633 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 103C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
February 12, 2007 by alexis

science
ok, so i saw somebody already put this question here a few min ago but the answer wuz confusing... 25. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of 183C and the other has a boiling ...
March 12, 2014 by jessiej

AP Chemistry
The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the ...
October 12, 2010 by Em

math
86 88 80 71 62 75 66 68 (degrees) which sentence best describes the data? a- the temperatures vary by 26degrees b-the interquartile range is 15degrees c-the median temperature os 71degrees d-the lowest temperature is 66degrees i marked out c and d but i cant decide on a or b ...
March 15, 2009 by whitney

Statistics
During September, the average temperature of Laurel Lake is 64.2 and the standard deviation is 3.2. Assume the variable is normally distributed. For a randomly selected day, find the probability that the temperature will be a. Above 62 b. Below 67 c. Between 65 and 68
March 16, 2013 by Penny

chem -help
Two cylinders at 27C are connected by a closed stopcock ystem. One cyclinder contains 2.4 L of hydrogen gas at o.600 atm; the other cylinder contains 6.8L of helium at 1.40 atm. Assume valve take up no room. what is the total pressure when the valve is open ? (0.600 atm)(L)/(0...
October 15, 2009 by Suzie

CHEMISTRY
This is STOICHIOMETRY. Please i need help in the worst way. I don't understand this at all and it is due tomorrow, please i need someones help who really understands this. #1.aluminum nitrite and ammonium chloride react to form aluminum chloride, nitrogen gas, and water. What ...
May 13, 2010 by Jamie

Chemistry
I have two substances potassium sulfate and potassium carbonate. They are unlabelled and I need to know which one is which. If I add HCl to each substance ie K2SO4(s) + 2HCl(aq)-->2KCl(aq) + H2SO4(aq) K2CO3(s) + 2HCl(aq)--> 2KCl(aq) + H2O(l) + CO2(g) What would I observe...
April 24, 2007 by Fiona

science
How long does it take the ball in problem 5 to travel 15 meters after being played? Neglect the gravitational effect, and suppose the ball travels along a straight line and assume a speed of 24 m/s. A racecar driver steps on the gas, and his car travels 16 meters in 2 seconds...
June 17, 2013 by bittubeniwal

physics
Q.an aluminium can of mass 200gm contains 500gms of water at 50c.an ice cube of mass 50gms,initially at a temperature of -20c is thrown into the can of water. i.what is the final temperature onces the ice metls and comes into equilibrium? ii.now a 200gm piece of Iron whose ...
June 1, 2013 by rosy

Business Law
Dan, a driver for EZ Delivery Company, leaves a truck's motor running in neutral and carelessly forgets to set the parking brake while he makes a delivery. The truck rolls and crashes into a nearby gas station pump, igniting a fire that spreads quickly to a construction site a...
February 10, 2009 by Carol

Finance
Sheryls Shipping had sales last year of $15,000. The cost of goods sold was $7,500, general and administrative expenses were $2,000, interest expenses were $1,500, and depreciation was $2,000. The firms tax rate is 30%. a. What are the earnings before interest and taxes? b. ...
February 4, 2013 by Ashley

Chemistry
A gas sample containing only SO3, CH2O and C2H6O2 has the following mass percent composition: 65.1% SO3 and 8.79% CH2O. Calculate the partial pressure (torr) of SO3 if the total pressure of the sample is 4712 torr. Unit conversion K = C + 273 1 atm = 760 torr Molar Mass (g/mol...
March 4, 2010 by Luc

Chemistry
If 45.3 mL of liquid CS2 and 7.62 L of gaseous O2 measured at STP are reacted stoichiometrically according to the balanced equation, how many milliliters of liquid CS2 remain? CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g) Molar Mass (g/mol) CS2 76.143 O2 31.998 Density (g/mL) CS2 1....
April 20, 2010 by Lisa

science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would rupture and release the...
January 2, 2011 by anonymous

College Chemistry
For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
April 12, 2013 by Jose

Math
Which would amount to more money on December 31 of this year: $500 invested on January 1st of this year at 10% annual interest compounded quarterly; or a lump sum payment of $580? (a) the $500 investment (b) both are the same (c) the $580 lump sum (d) there is not enough ...
November 3, 2011 by Michael

Chemistry - Equations
I am a student in the ninth grade and I need help with the following problems because I do not understand how to do them. I appreciate your help and thanks once again. 7. in 2CO(grams) + O2(grams) => 2CO2(grams), what is the ratio of moles of oxygen used to moles of CO2? 9...
January 31, 2008 by Theodore

math STEVE
Mr. Corbin is a salesman. He gets a 5% commission on all sales between $100 and $500 and a 10% commission on all sales above $500. His commission on sales of $783 was:
August 19, 2014 by Sharon

science grade 5
how is heat related to temperature? Temperature tells us the DEGREE of heat; i.e., how hot is something. A temperature of 98.6 F is normal body temperature. A hot day is when the temperature is 95 degrees F. A cold day is when it is freezing outside. But the heat something ...
November 15, 2006 by kathy

Chem. thankss!!!
1.0 mol of water (c=4.184 J/g.oC), 1.0 mol of ethanol (c=2.46 J/g.oC), 1.0 mol of carbon tetrachloride (c=0.861 J/g.oC), and 1.0 mol of ethylene glycol (c=2.42 J/g.oC) at 50oC were each placed into a separate coffee cup calorimeter and the temperature recorded. The temperature...
November 5, 2010 by Melissa

Math
The formula W = 35.74 + 0.6215T - 35.75V^4/25 + 0.4275TV^4/25 relates the wind chill temperature W to the air temperature T in degrees Fahrenheit and the wind speed V in miles per hour. Use a calculator to find the wind chill to the nearest degree when the air temperature is ...
January 12, 2015 by Anonymous

math
A store pays a 6% commission on the first $500 in sales and 8% on sales over $500. Find the commission on an $800 sale. I just need the commission on the $800 sale, cause i finish the other questions in this problem. Please explain how to do it.
January 6, 2014 by Thomas

Chemistry
Heat energy is added to a 325 g block of nickel, and the temperature increases from 23 degrees celsius to 51 degrees celsius. If the same amount of heat was added to the same mass of water at the same temperature, what would the water's final temperature be?
September 12, 2013 by Bre

Mat/116
An experiment is underway to test the effect of extreme temperatures on a newly developed liquid. Two hours into the experiment the temperature of the liquid measured to be -17 degrees celsius. After eight hours of the experiment the temperature of the liquid is -47 degrees ...
February 23, 2014 by Carla

calculus
A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 30ft, find the dimensions of the window so that the greatest possible amount of light is admitted. I keep screwing up in creating my equation. p = perimeter of window l...
November 20, 2011 by Daniel

Chemistry
Hi, I posted my question earlier but I was having some difficulty with it. 2Al+ 3Cl2-->2AlCl3 You are given 31.0g of aluminum and 36.0g of chlorine gas. 1.If you had excess chlorine, how many moles of aluminum chloride could be produced from 31.0g of aluminum? ...
September 28, 2010 by Jeremy

Chemistry
You have a 22L cylinder of helium at a pressure of 150atm and a temperature of 31C. How many ballons can you fill, each with a volume of 5.0L, on a day when the atmospheric pressure is 755mmHg and the temperature is 22C?
September 27, 2009 by Eric

Heat & Properties of Matter
A rail way 50m long, with initial temperature of 20degree celsius subjected to a great heat. How much will it expand which its temperature is tripled?
October 18, 2009 by Beta plus

statistics
assume the body temperature of healthy adults distributed with a mean of 98.20F and a standard deviation of 0.62F. If you have a body temperature of 99.00F, what is your percentile score?
May 16, 2010 by Christine

physics II
A certain material is in a room at 27C. If the absolute temperature (K) of the material is tripled, its resistance doubles. (Water freezes at 273 K.) What is the value for alpha (a) the temperature coefficient of resistivity?
July 28, 2010 by Alinkashia

Science
For a constant temperature, the water content of an air mass is 0.15 mg/l. If the saturation of air at that temperature is 0.50 mg/l, then the relative humidity is Fill in the Blank 01%. (Note: the answer to this question is a number.)
October 25, 2010 by jjjj

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 by CJ

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