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August 30, 2016

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: 26,933

CHEM
a gas bulb is connected to an open end manometer. the pressure in the bulb is .355 torr MORE than atmospheric pressure. If the manometer is filled with mineral oil (density .888 g/cm^3) then what wil be the difference in height between the two sides of the manometer? (density ...
March 21, 2011 by Joanie

Chemistry
5.00 liter steel cylinder is filled with water vapor at 100 C and 650 mm Hg. The problem I am having is whether the 5.00L significant in the problem and if so where? a. Determine the density of this gas sample. b. Determine the mass of water that condenses to a liquid when ...
July 11, 2011 by Anonymous

Chemistry*Dr.Bob
I keep finding all sorts of different enthalpy of vaporizations for bromine. I used: 254.66 So factoring 254.66/2 into my equation below i ended up with a lattice energy of -863.33. Can you confirm this? ____________________________________________________________ What is the ...
February 2, 2011 by Crystal

S.S.
1. At current rates of use, known supplies of oil and natural gas may run out in less than _____ years. (1 point) 10 100 500 1,000 2. Which country consumes more oil, or petroleum, than it produces? (1 point) Mexico Iran United States Russia 3. Minerals, coal, and natural ...
January 14, 2013 by This Girl

Science
1. What is the relationship between elevation and average surface temperature? 2. What is the generalized relationship between latitude and average surface temperature..(I think it's that the higher the latitude, the colder the surface temperature)? 3. What is the relationship...
January 22, 2009 by Katrina

Calculus
A rectangular storage container with an open top is to have a volume of 10m^3. The length of its base is twice the width. Material for the base costs $3 per m^2. Material for the sides costs $10.8 per m^2. Find the dimensions of the container which will minimize cost and the ...
March 6, 2013 by Travis

phi
11{2[3(11)35]}> Some politicians claim to support the environment in speeches they make around the country. However, to get to those speeches they ride in gas guzzling, pollution creating private planes. They therefore clearly dont believe a word of what they say and are ...
April 5, 2011 by lyz

science
How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? 1. Write the balanced chemical equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert grams Zn to mols. mols = grams/atomic mass Zn. 3. Using the ...
March 17, 2007 by Josh

Physics
A 500 g glass beaker is in thermal equilibrium with 100 ml of 20 Degrees celsius water in it. If a 5 g sample of copper is placed into the water and the system is allowed to come into thermal equilibrium, what will the final temperature of the system be? (assuming no heat loss...
January 5, 2012 by Rachel

Chemistry
Limestone (CaCO3) emits CO2 gas when exposed to HCl. What is the theoretical yield of CO2 if 56.1 grams of limestone is completely dissolved in HCl? CaCO3(s) + 2 HCl(aq) R CaCl2(aq) + CO2(g) + H2O(l) a. 21.5 g b. 4.16 g c. 9.53 g d. 24.7 g
June 5, 2013 by Anonymous

accounting II
Janice Janitorial Supplies has cash of $28,000; net accounts receivable of $33,500; short-term investments of $6,000 and inventory of $20,000. It also has $22,500 in current liabilities and $37,500 in long-term liabilities. The current ratio for Janice Janitorial Supplies is:
August 27, 2014 by CAW

chem
given the reaction - Fe(s)+H2SO4(aq)->FeSO4(aq) + H2(g) the volume of the balloon was 4400m^3 and the loss of hydrogen gas during filling was est. at 20%. what mass of iron splints and 87% (by mass) H2SO4 were needed to ensure complete filling of teh balloon? assume temp of...
November 16, 2007 by mel

Chemistry
When a 1.350g sample of element X is heated in a stream of chlorine gas 6.67g of XCl3 are formed.1.) What(write) is a balance equation for the reaction using 'X' for the element? 2.) Calculate the atomic weight of X. 3.)What mass of X is left unreacted? 4.)When 1.00 grams of X...
December 9, 2010 by Joseph

Chemistry
When a 1.350g sample of element X is heated in a stream of chlorine gas 6.67g of XCl3 are formed.1.) What(write) is a balance equation for the reaction using 'X' for the element? 2.) Calculate the atomic weight of X. 3.)What mass of X is left unreacted? 4.)When 1.00 grams of X...
December 9, 2010 by Joseph

chemistry
Are bond energies (single and multiple bonds) applicable only to gas phase?? For instance, I can use the bond energy data to calculate for enthalpy of reaction for the formation of water: 2 H2(g) + O2(g) -> H2O(g) But I can't directly use it to calculate for neutralization ...
September 19, 2012 by Namie

chem
Are bond energies (single and multiple bonds) applicable only to gas phase?? For instance, I can use the bond energy data to calculate for enthalpy of reaction for the formation of water: 2 H2(g) + O2(g) -> H2O(g) But I can't directly use it to calculate for neutralization ...
September 19, 2012 by Namie

Chemistry
The gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g) 2 NO2(g) + O2(g) is first order in N2O5. During one experiment it was found that when the initial concentration of N2O5 was 0.218 M, the concentration of N2O5 dropped to 2.96E-2 M after 282 s had passed. ...
January 24, 2014 by Breauna

physics
Thermal energy is caused by motion of? 1. mixing water molecules contained in a beaker 2. molecules in soild liquid and gas phases 3. mixing molecules together 4. molecules that have reached equilibrium the density of an object with the volume of 60.0 mL and a mass f 400.0 g ...
January 15, 2015 by becky

english
punctuating sentences, adding subject/and or verb. I do not get it, I am lost with this assignment. I need help. 1. With five gallons of gas. 2. Because the store was closed. 3. For the seventh time. None of these three is a complete sentence. You need to add words to complete...
July 20, 2007 by Anonymous

Re: Pig question (Physics)
Thank you, I think I get it now. I have one more question: a kimchi container of mass 1=3.0 kg connected to a block of mass m2 by a cord looped around a frictionless pulley. The cord and pulley have negligible mass. When the container is released from rest, it accelerates at 1...
October 12, 2006 by Amber

Math
To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.
October 23, 2012 by Ashely

Math
To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.
October 23, 2012 by beth

math
Between 6a.m.and 10a.m.the temperature rose by 5f.between 10a.m.and 2p.m.the temperature rose by 6f.between 2p.m.and 6p.m.the temperature rose by 0c.would you be able to tell how much the temperature rose since 6a.m?
April 20, 2015 by Mariah

physics
1. Assume that 10 g of steam is added to 100 g of water initially at 19C. The water is inside an aluminum cup of mass 35 g. The cup is inside a perfectly insulating calorimetric container that prevents heat flow from the outside environment. Find the final temperature of the ...
December 5, 2013 by bano

physics
Assume that 10 g of steam is added to 100 g of water initially at 19C. The water is inside an aluminum cup of mass 35 g. The cup is inside a perfectly insulating calorimetric container that prevents heat flow from the outside environment. Find the final temperature of the ...
December 5, 2013 by bano

Barton County Community College
What is the proper adjusting entry at June 30, the end of the fiscal year, based on a prepaid insurance account balance before adjustment, $15,500, and unexpired amounts per analysis of policies, $4,500?
October 7, 2008 by Angela

chemistry
How many moles of gas must be forced into a 3.1L ball to give it a gauge pressure of 9.8psi at 22degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5psi so that the total pressure in the ball is 24.3psi .
April 28, 2012 by Jess

chemistry
How many moles of gas must be forced into a 3.7L ball to give it a gauge pressure of 8.4psi at 23degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.6psi so that the total pressure in the ball is 23.0psi
April 28, 2012 by Jessica12

physical science
Inside the cylinders of a diesel engine, the mixture of fuel and air is compressed to about 1/20 of its original volume. although diesel engines have no spark plugs to ignite this mixture, it ignites anyway because_. a) increases in temperature decrease molecular motion b) ...
April 12, 2010 by Andrea

Science for connections academy HELP!
Tony's teacher gave him an unknown substance to identify on its properties. after a few tests Tony listed his observations. Solid at room temperaure. Brittle. Conducts electrcity. What kind of substance does tony have? A:nonmetal B:Metal C:Metalloid D:Noble gas Please say ...
November 3, 2015 by Emily Peppo

chemistry
When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C 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 round ...
February 21, 2009 by tweety

CHEMISTRY
Find the equilibrium constant. 1. The equilibrium constant for the reaction,! Fe3+ + SCN- ⇋ FeSCN2+ (at a specific temperature), can be determined by first preparing a standard solution of FeSCN2+ and comparing its absorbance of light to an equilibrium system of unknown ...
December 3, 2013 by Anonymous

Physics, please help!!!!
A 3.00 kHz tone is being produced by a speaker with a diameter of 0.175 m. The air temperature changes from 0 to 29C. Assuming air to be an ideal gas, find the change in the diffraction angle My solution v directly proportional to sqrt T v = sqrt 302 =17.382 lambda = v/f = 17...
May 6, 2007 by Papito

Accounting
The standard costs and actual costs for direct labor for the manufacture of 2,500 actual units of product are as follows: Standard Costs Direct labor 7,500 hours @ $12.00 Actual Costs Direct labor 7,400 hours @ $11.40 The amount of the direct labor rate variance is: Answer A.$...
July 23, 2013 by Anonymous

Chemistry/gases/temp/volume
Given 120mL of neon gas at 40 degrees C, what teperature corresponds to a volume that has been decreased by 30mL? (P1V2)/T1 = (P2V2)/T2. Use V1 = 120 mL and V2 = 120-30=90 mL Don't forget to change degrees C to Kelvin. Kelvin = 273 + oC.
December 11, 2006 by Desiree

Algebra
3. The linear equation y=0.15x+.079 represents an estimate of the average cost of gas for year x starting in 1997. The year 1997 would be represented by x = 1, for example, as it is the first year in the study. Similarly, 2005 would be year 9, or x = 9. c) What is the slope (...
May 9, 2009 by Anonymous

chemistry
The equation for burning C2H2 is 2C2H2(g) + 5O2(g) ⎯→ 4CO2(g) + 2H2O(g) a. If 15.9 L C2H2 react at STP, how many moles of CO2 are produced? (Hint: At STP, 1 mol = 22.41 L for any gas.) b. How many milliliters of CO2 (density = 1.977 g/L) can be made when 59.3 mL O2...
June 2, 2010 by rob

Chemistry
Which method(High Performance Liquid Chromatography or Gas Liquid Chromatography) would be suitable for the separation of the following mixtures? 1) Mixture of paracetamol, codeine and caffeine. 2) Mixture of alpha-pinene, beta-pinene, eucalyptol, alpha-terpineol. Please ...
January 12, 2014 by Yu

Algebra
marie730 the temperature at the end of the day was 64 degrees. the temperature has increased twice during the day,once by 8 degrees and another time by 4 degrees which expression shows what the temperature was at the start of the day 64-8-4 64+8-4****** 64-8+4 78+5+7 Please help
September 6, 2015 by Bubbles

Science/maths
describe how you could make the following measurements and discuss any problems you might encounter a) finding the volume of a rugby ball b) finding the diameter of tennis ball. c) findin the mass of a grain of sugar a) submerge it in water in a graduated container and find ...
March 3, 2007 by San

chemistry
describe objects that commonly undergoes oxidation. I already have an apple, copper, iron, aluminium, magnesium... would you have any more idea's
April 21, 2008 by shane

Physics
Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n=7 energy level to produce a line in the Paschen series.
September 11, 2008 by Jenny

college physcial science
a car whose inintal speed is 30m/s undergoes a constant acceleration of 5m/s2. In the first 6s after the accleration starts the car travels
July 14, 2011 by Tammie Mitchell

math
Suppose that you are a CSI and you are called to a crime scene at 12:00 noon and find a dead body in a walk-in that is a constant 40H. The initial temperature is 85 and after 20 minutes. The bodys temperature is 84. Using Newtons Law of cooling u(t) = T +(u0 C T)ek...
December 18, 2011 by john

math word problem
from 8 a.m. to noon,the temperature rose 4F. From noon to 4p.m.,it fell 3f. From 4p.m. to 8p.m. ,it fell another 6f. At 8p.m.,the temperature was 72F.What was the temperature at 8p.m.?
April 21, 2009 by unknown !!!!!!!!!!!!!!!!!!!!

Equation Ms Sue?
From midnight to 6:00 am, the temperature rose 8C. At 6:00 am, the temperature was 20C. What was the temperature at midnight. I know it's -20-8 = -28 C temp at 12am, but how do I write it an equation?
May 14, 2013 by Moby

3rd grade math
i need help!! if the estimate is greater than or equal or 1,500, find the exact sum. if the estimate is less than 1,500, do not solve the problem. 867+734=1601 number model:_______________? thank you!
January 4, 2010 by pat

math
On his last credit card bill, Frank paid a variable finance rate of 1.5 percent on the first $500, and one percent on any amount above $500. How much did he pay if the unpaid balance was $741.23?
February 9, 2012 by help please help!!!

PHYSICS
Two metal rods -- one copper the other aluminum -- are connected in series, as shown in the figure below. Note that each rod is 0.525 m in length, and has a square cross section 1.25 cm on a side. The temperature at the copper end of the rods is 2.00C; the temperature at the ...
November 23, 2009 by jawn

Applied Physics
When a 3600 lb automobile runs out of gas, it is pushed by its unhappy driver and a friend a quarter of a mile (0.250 mi). To keep the car rolling, they must exert a constant force of 175 lb. (a.) How much work do they do? (b.) If it takes them 15 minutes, how much power do ...
October 22, 2013 by Kayla

AP Chemistry
A mixture of argon and mercury vapor used in advertising signs emits light of wavelength 610 nm. Calculate the energy change resulting from the emission of 1.00 mol of photons at this wavelength. Answer in units of kJ/mol.
November 30, 2010 by Billy

Chemistry
How many moles of gas must be forced into a 4.8L tire to give it a gauge pressure of 30.8psi at 30 degrees celsius? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5L so that the total pressure in the tire is 45.3psi. What formula...
February 20, 2013 by Claire

chemistry
Aluminum metal reacts with oxygen gas (O2) to form aluminum oxide. a. Write a balanced equation for this oxidation-reduction reaction. (In this problem you need not worry about the physical state of the reactants or product.) 2Al+3O2=2Al2O3 b. which reactant is oxidized? O2 c...
February 14, 2012 by krystal

Chemistry
2- Gases A2 and B2 react according to the equation: A2 + B2 → AxBy . If equimolar ( not necessarily stoichiometrically equivalent) quantities are placed in a reaction vessel with a massless, frictionless piston and allowed to react to completion. The density of the gas ...
April 2, 2016 by Ian

accounting
1. Please refer to the worksheet below. Trial Balance Adjustments Adjusted Trial Balance Income Statement Balance Sheet Account Title Dr. Cr. Dr. Cr. Dr. Cr. Dr. Cr. Dr. Cr. Cash $1,700 $1,700 $1,700 Accounts receivable 8,500 $2,000 10,500 10,500 Supplies 100 $80 20 20 ...
August 15, 2011 by jimmy

Chemistry
In an experiment 2.750 g of magnesium is reacted with 2.571 g of oxygen gas according to the equation: Mg + O2 ==> MgO. What mass of the other reactant is in exess? You need equal number of moles of each. Which has the excess? moles Mg=2.750/molmassMg moles O2=2.571/32 One...
June 3, 2007 by Ashley

Physics
You are taking a road trip to the beach for Spring Break. You leave at 12:00 pm. At 12:30 you stop for lunch 10 miles down the roads. You get back on the road and travel 75 more miles and realize that you need to stop for gas. You notice that it is now 1:10 pm. At the point in...
April 8, 2009 by Landon

CHEM
Will you please tell me if these are right? Write the symbol of the caton or anion that give(s) the following reaction:? 1. Forms a precipite with AgNO3 that does not dissolve in HNO3 2. Forms a gas with HCl 3. Give a bright, yellow-orange flame test 4. Forms a precipitate ...
November 7, 2010 by Jason

Chemistry
A sample of carbon monoxide gas whose mass is 6.37 g is heated from 25 oC to 192 oC at a constant pressure of 4.12 bar. Calculate q (in J) for this process. I got an answer of ~1110J Calculate w (in J) for this process. I am unsure how to calculate work considering there is no...
January 24, 2012 by David

CHEM
4. The decomposition of phosphine, a very toxic gas, forms phosphorus and hydrogen in the following reaction: 4PH3 (g) P4 (g) + 6H2 (g) (a) Express the rate of reaction with respect to each of the reactants and prducts (b) If the instanteneous rate of the reaction with respect...
June 22, 2015 by N.Z

pre-calc
A roasted turkey is taken from an oven when its temperature has reached 185F and is placed on a table in a room where the temperature is 53F (a) If the temperature of the turkey is 150F after half an hour, what is its temperature after 45 min? (Round your answer to the ...
September 27, 2012 by Ms. Sue please help!

Math
Martin wants to make a scatter plot comparing the temperature outside with the number of people at the city swimming pool. Which of the following trends would most likely represent the data? A/There is no relationship between the temperature and the number of people at the ...
June 26, 2013 by Sidney

math
A roasted turkey is taken from an oven when its temperature has reached 185F and is placed on a table in a room where the temperature is 53F (a) If the temperature of the turkey is 150F after half an hour, what is its temperature after 45 min? (Round your answer to the ...
September 27, 2012 by Help! VERY URGENT!

chem
which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is felt when a warm ...
February 20, 2007 by Jenn

college
Hi, I would like to ask if there is someon who can recomend me a good university, for a person that wants to be a surgeon and what would be a good thing to get a major on? thanks in advance Talk with your high school guidance counselor. Then try to be admitted to the most ...
April 22, 2007 by claudia

math
Hi, I had a question about exponential growth. The problem says: The population in Woonsocket is 43,500. Every year the population increases by 2%. Write the exponential equation that represents this situation. I put that the equation was 43,500 (1+.2)^y (y standing for how ...
March 4, 2008 by Juliana

Trignometric Functions
The temperature, throughout the year, in a particular town can be graphed using trigonometric functions. On July 24th, the hottest day of the year, the temperature is 27 degrees Celsius. On Jan. 24th, the coldest day of the year, the temperature is -11 degrees Celsius. ...
December 22, 2015 by Chris

Physics
According to Kinetic Theory, the molecules of a gas at given temp: a) all move with speed Vrms b) all move at speeds greater than Vrms c) speeds less than Vrms d) above, at, or below Vrms e) none i think its D as Vrms is an average but i am not sure
January 7, 2009 by Sarah

Chemistry
AlCl3(aq)+ NH4OH(aq)-> Al(OH)3(s) + NH4Cl(aq) AlCl3(aq)+ 3NH4OH(aq)-> Al(OH)3(s) + 3 NH4Cl(aq)... is balanced-- Now total ioic?? Is this right?? : Al +3Cl+3NH4 +OH --> Al+ 3OH+ 3NH4+ 3Cl Crossing out on both sides I end up with OH --> 3OH I do not know what to do ...
November 30, 2011 by Ashley

Chemistry- Answer Check
In an ideal gas, if only one molecule in a thousand has enough energy to react, how can all molecules in a reactor be consumed? My answer: when the one molecule reacts, it causes the other molecules to gain energy. Is this right? I'm still confused on the question
September 29, 2014 by Nancy

physics
A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases by 35 J between A and...
January 10, 2007 by Brian

math(LP)
sorry here again.. never mind the table i said...sorry The cheesy company produces two types of cheese with extra sharp cheddar cheese. The cheese spreads are packaged in 120 ounce containers, which are then sold to distributors throughout northeast. The regular blend contains...
June 23, 2009 by cocobunniesfromhell

math(LP)
sorry here again.. never mind the table i said...sorry The cheesy company produces two types of cheese with extra sharp cheddar cheese. The cheese spreads are packaged in 120 ounce containers, which are then sold to distributors throughout northeast. The regular blend contains...
June 23, 2009 by cocobunniesfromhell

Science
Which of these statements about saltwater is correct? a. Saltwater freezes at a lowers temperature? b. Saltwater freezes at a higher temperature c. saltwater does not freeze at any temperature d. saltwater freezing point depends on the temperate of ocean floor***
February 24, 2014 by Hannah

Chemistry
I have to write the balanced equation for the reaction between hydrochloric acid and zinc metal.I came to the answer of: HCl+Zn(s)-->H(g)+ ZnCl Can someone tell me if this is the correct balanced equation for this reaction? No it isn't but it's close. The gas hydrogen ...
April 23, 2007 by Chrissy

chemistry
Gasahol is a fuel containing ethanol(C2H6O) that burns in oxygen (O2)to give carbon dioxide and water. a)How many moles of O2 are needed to completely react with 4.0 moles of C2H60? b) If a car produces 88g of CO2,how many grams of O2 are used up in the reaction? c)If you add ...
March 17, 2011 by Connie

gas
water shoots from the mouth of a tall gargoyle fountain straight into the air with an initial velocity of 37 feet per second. It take the water 5 seconds to travel through the air and actually falls past the point from which it came, splashing down onto the ground. how tall is...
October 8, 2012 by qdhad

math
The graph below shows the rate of natural gas usage (in therms per day) in one household for a 30 - day period. Estimate the total number of therms used during this period. Use left endpoints and rectangles with widths of 3 days. View graph at: postimg.o r g/image/61nw3co3r/
November 22, 2013 by math

algebra
A cup of coffee is heated to 180F and placed in a room that maintains a temperature of 65F. The temperature of the coffee after t minutes is given by T(t) = 65 + 115e^−0.042t.(a) Find the temperature, to the nearest degree, of the coffee 10 minutes after it is placed ...
November 17, 2014 by Barb

MATH
from 6:30 am to 4:30 pm on Monday, the temperature rose 12 degreesC. From 4:30 pm on Monday to 5:45 am on Tuesday, the temperature dropped 7 degreesC. The temperature at 5:45 am on Tuesday was -2 degreesC. What was the temperature at 6:30 am on Monday? plz i need ur help this ...
February 24, 2015 by Bro

math
suppose that the gas tank of a car holds 12 gallons and that the car uses 1/ 20 of a gallon per mile .let x be the nuber of miles the car has gone since the tank was filled? (1/20x)= 12 so now get x by itslef! (1/20x)/ (1/20)= 12/(1/20) x= 240! yeah I am good! that is good! ...
October 30, 2006 by jess

chemistry
Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how much HCN, in grams, is produced?
October 3, 2011 by Kara

math
The temperature dropped 15 degrees from the high temperature to 6 C. What was the high temperature?
December 2, 2009 by Poo

Integers
At 11:00 pm the temperature was -9 degrees. By 7:00 am the temperature had risen 18 degrees. What was the temperature at 7:00 am.
May 22, 2015 by Edward

math
the temperature at 8 a.m. was 65 degrees. By 11 a.m. the temperature had increased 17 degrees. What was the temperature at 11 a.m. ?
March 21, 2016 by dani

Chemistry
Dinitrogen tetroxide decomposes according to N2O4 (g) = 2NO2 (g) In a certain experiment, N2O4(g) at an initial pressure of 0.554 bar is introduced into an empty reaction container; after equilibrium is established, the total pressure is 0.770 bar. A quantity of NO2(g) is ...
March 19, 2012 by Angel

algebra
The temperature on a summer day is 77 degrees Fahrenheit. The formula to covert temperature to degrees Celsius is C = 5/9(F-32). What is the corresponding temperature in degrees Celsius?
September 1, 2013 by Tee

Chemistry
A solution is made by mixing 500 ml of 0.172 M NaOh with exactly 500 ml of 0.100 M CH3COOH. Calculate the equilibrium concentration of the species below. Ka of CH3COOH is 1.8 x10^-5 [H+]=? {OH-]=? [CH3COOH]=? [Na+]=? [CH3COO-]=?
April 9, 2014 by Angela

College Algebra
According to Newton's law of cooling, the rate at which an object cools is directly proportional to the difference in temperature between the object and the surrounding medium. The face of a household iron cools from 130 to 100 in 30 minutes in a room that remains at a ...
December 10, 2014 by Kyle

chemistry
The greatest pressure of the following is that exerted by: (a) a column of Hg 75.0 cm high (d=13.6 g/cm^3) (b) 10.0 g H2 gas at STP (c) a column of air 10 miles high; or (d) a column of CCl4 60.0 cm high (d=1.59 g/cm^3) The answer is b. I know that pressure=force/area and ...
November 2, 2011 by Holly

chemistry
A chemist dissolves 0.097 g of CuSO4 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 13.6-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in the second solution...
April 14, 2015 by Anonymous

chemistry
how could you determine whether all the potassium chlorate had been decomposed after heating it using the law of definite composition?
March 10, 2010 by Ash

Science
CaCo3 _____ CaO+CO 2 From this eqn caculate the amount of Carbon dioxide in grams liberated by heating 25g of calcium carbonate ?
October 4, 2015 by Amaresh S Patil

Chem1LB
When 0.917 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 3.76C 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 round ...
February 17, 2010 by Alex Le

AP Chemistry
Two objects A and B of different size are both at a temperature of 500 K and are connected by a rod (A looks four times larger than b). What will be the nature of transmission of heat? I believe there won't be a transmission of heat. Any thoughts. Here are the options A. ...
November 17, 2014 by Morgan

Biology
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?
October 26, 2011 by Tommy

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
January 17, 2014 by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
January 31, 2014 by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
February 3, 2014 by Riley

math
Katie converts the outside temperature from degrees fahrenheit, f, to degrees celsius, c. She uses the formula below to convert the temperature. (F-32)5/9=c if the outside temperature is 50 degrees fahrenheit, what is the outside temperature in degrees celsius
May 4, 2011 by natalie

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