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September 28, 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: 27,117

chemisty help please
A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres?
November 2, 2010 by Billy

Physics
A gas with initial conditions p_i, V_i, and T_i expands isothermally until V_ f=6 V_i. What are (a) T_f and (b) p_f? in terms of T_f/T_i and P_f/P_i First I dont understand what this is saying at all. And Second I need to know how to solve it.
August 13, 2011 by Catie

chemistry
we have a bag that can hold up to 775 ml. we have baking soda and 6 molar of hydrochloric acid. how can we find out how much baking soda and acid we need so that when they react, the gas will fill the bag up just enough so that it wont pop
April 10, 2012 by george

chemistry
To form a gas, the molecules of a liquid must overcome the intermolecular forces of attraction that bind them in the liquid state. As these forces of attraction become stronger, what happens to the boiling point? the boiling point:increases, decreases, or remains constant
September 5, 2012 by daniela

chemistry
Write a balanced chemical equation for the reaction that occurs when barium carbonate decomposes into barium oxide and carbon dioxide gas when heated. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
October 1, 2012 by Anonymous

Chemistry
When CH3OH at its normal boiling point, does its entropy increase or decrease? Explain. - My opinion The entropy decreases because there is less order due to the less randomness of gas particles favoured when such an element is boiled not at normal boiling point?
November 27, 2015 by Liam

Chemistry
If you have a properly adjusted hot flame, which is pale blue with three distinct comes, what is observed if the GAS CONTROL valve is slightly closed versus what's observed if the AIR CONTROL valve is slightly closed? Please Explain.
June 12, 2016 by Christy

Chemistry
Shown below is a rough sketch of the unary phase diagram (pressure vs. temperature) for carbon dioxide , dry ice. Note the diagram is not drawn to scale and contains breaks in the axes to signify this. Using the diagram, answer the following questions: (a) Give the pressure (...
January 11, 2013 by Chemgam

Chemistry
In the experiment of Nucleophilic substitution reactions: Competing Nucleophiles 1)what would happen if all the solids in the nucleophile medium were not dissolved? How might this affect the outcome of the experiment? 2)Explain the order of elution you observed while ...
February 16, 2010 by Jennifer

math, algebra
can someone correct this for me... Problem : Business and finance. Linda Williams has just begun a nursery business and seeks your advice. She has limited funds to spend and wants to stock two kinds of fruit-bearing plants. She lives in the northeastern part of Texas and ...
December 29, 2006 by jasmine20

chemistry
2. Calculate the enthalpy change of combustion for ethene gas (C2H4) given the following enthalpy changes of formation: ΔHf(C2H4)(g) = +52 kJ mol^-1 ΔHf(CO2)(g) = -394 kJ mol^-1 ΔHf(H2O)(g) = -286 kJ mol^-1
July 19, 2014 by John

AP Chem
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen chloride. Suppose someone contends that the vapor consists of NH4Cl molecules rather than a mixture of NH3 and HCl. Could you decide between these ...
November 15, 2008 by Anna

AP Chem
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen chloride. Suppose someone contends that the vapor consists of NH4Cl molecules rather than a mixture of NH3 and HCl. Could you decide between these ...
November 16, 2008 by Anna

scientist
Mr.Becks gigantic gas- guzzling exhaust spewing urban assault vehicle suburban weighs 10000 pounds it takes Mr Beck 2 minutes to drive 1.5 kilometers to west valley fitness so he can ride the stationary exercise bike for a half hour How much work and power did the suburban do...
October 25, 2009 by Barb

Calculus
A steel storage tank for propane gas is to be constructed in the shape of a right circular cylinder with a hempishere at each end. The cost per square foot of constructing the end pieces is twice that of contructing the cylindrical piece. If the desired capacity of the tank is...
July 2, 2012 by Rae

physics
An electron has an initial speed of 178000 m/s. If it undergoes an acceleration of 4.8 x 1014 m/s2, how far has it traveled before reaching a speed of 789000 m/s? Answer in units of m.
August 24, 2011 by Hannah

physics
An electron has an initial speed of 178000 m/s. If it undergoes an acceleration of 4.8 x 1014 m/s2, how far has it traveled before reaching a speed of 789000 m/s? Answer in units of m.
August 24, 2011 by Hannah

chem
Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. (a) How many beta particles are emitted in 47.0 s by a 2.39-mg sample of 60Co? i got 2.44e19 but thast wrong
September 12, 2012 by sara

Stats Homework Please Help!!!
Statistics Homework Help! Statistics Question Political Contributions: Listed below are contributions (in dollars) made to the two presidential candidates in a recent election. All contributions are from the same zip code as the author, and the data are from the Huffington ...
May 14, 2016 by Lexus

Chemistry
A sample of gas in a cylinder of volume 3.64 L at 275 K and 2.68 atm expands to 7.04 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J What I did was basically W=-P(delta V) Which was -(2.68 atm)(3.4...
October 18, 2015 by Alex

physic
A Carnot engine takes an amount of heat QH = 113 J from a high-temperature reservoir at temperature TH = 1170C, and exhausts the remaining heat into a low-temperature reservoir at TL = 13.3C. Find the amount of work that is obtained from this process
May 13, 2011 by John

English
Thank you very much for helping me! Your information was really of help can you say that?) Here is a paragraph I wrote on Dulce et Decorum Est by Owen. I know it is incomplete. I also need to find more data on the "War poets" and on this poem, too. Can you help m? 1) This poem...
March 20, 2011 by Mike

College Algerbra
THE TEMPERATURE ON A SUMMER DAY IS // DEGREES FAHRENHEIT.the formula to convert the temperature to degrees Celsius is C = 5/9(F-32) what is the corresponding temperature in degrees Celsius?
March 24, 2013 by Eric

Intermediate Algebra
A car used 3.5 gallons to make a 110 mile trip. How many gallons of gas would it take the same car to make a 360 mile trip
May 1, 2012 by Christell

chemistry
60 cm of hydrogen diffused through a porous membrane in 10 minutes. The same volume of gas G diffused through the same membrane in 37.4 minutes. Determine the relative molecular mass of
June 30, 2016 by emmanuel

chemistry
Hi, i recently constructed a hofmann apparatus at home out of pvc and had some trouble with it. Basically, once it is set up, i only get gas from one electrode, the other does nothing. H2SO4 is used as the electrolyte, and the is 12 volts at 4 amps being put through it, DC. ...
June 8, 2008 by Pickle

Math Word Problem
Sales of frozen pizza for a club fund-raiser increased from 500 one year to 575 the next year. What was the percent of increase? Would I divide 500 by 75?
October 21, 2009 by Kelly

accounting
If you decide to buy a car for $17,500 and get $2,500 on a trade-in. If the bank finances the remainder at 7.8%, and you want to pay off the loan in 5 years, how much will your monthly payments be? (Assume that interest is compounded monthly.)
April 19, 2011 by happy

math
A raffle has a $500 first prize, two $100 second prizes and five $25 third prizes. If 500 tickets are sold for $5 each find the expected value of buying a single ticket.
July 10, 2011 by Shay

Math
The process sends the dust through a heater that raises the temperature to 500 F with an air density of 0.042 lbs./ft3. The velocity pressure of the air moving through the process is 2.7 inches of water. What is the estimated air velocity in the process?
March 22, 2012 by Wezee

Chemistry
A 1.00 L flask containing the equilibrium mixture CO +Cl2 <-> COCl2 was found to contain 0.400 mol of COCl2, 0.100 mol of CO, and 0.500 mol of Cl2. If 0.300 mol of CO is added at constant temperature, what will be the new concentrations of each component at equilibrium?(...
April 29, 2012 by Divya

biology
You are preparing 500 mL of Denaturation Buffer containing 1.5 M NaCl and 0.5 M NaOH. Your stock solutions are 5 M NaCl and 6 M NaOH. How would you prepare the Denaturation Buffer? Include all of the solutions needed to make the buffer. For Nacl, C1V1=C2V2 5*V1=500*1.5 V1=150 ...
October 5, 2015 by sara

Physics
A rocket of 500 kg accelerates away from earth with an engine thrust of 13,500 N. a) what is the weight of the rocket? 4900 N b) how fast did the rocket accelerate? (I know the answer is 17.2 m/s^2 but how did they get that?)
October 5, 2013 by Michelle

Chemistry
In a reaction between pure acetic acid and sodium bicarbonate, 14.7 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction? Name of limiting reactant (acetic acid or sodium bicarbonate): How many moles of the ...
September 13, 2013 by Kayla

CHEM- need help ASAP
An equilibrium mixture in a 10.0 L flask contains 7.0 mol HI(g) and 1.0 mol each of I2(g) and H2(g). If 2.5 mol H2, 5.0 mol I2 and 2.0 mol HI are added to that equilibrium mixture how many moles of each gas will be present when equilibrium is reestablished?
April 16, 2014 by Meg

Physics
A 0.4 kilogram sample of Aluminum at 115 degrees Celsius is put into a container containing 0.5 kilograms of water at 15 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing that the specific heat of Aluminum is 900 kJ/kg*C, and the ...
July 17, 2014 by Anna

chem
When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 1.0 M HCl is required to react completely with 4.00 g of magnesium i did 4.00g x (mol/24.31 g Mg) x (2 mol HCl/1 mol Mg) x (L/!.0 mol HCl) = .329 L why ...
March 26, 2009 by Anon

chemistry
1) Aqueous solutions of potassium sulfate and ammonium nitrate are mixed together. Which statement is correct? A) Both KNO3 and NH4SO4 precipitate from solution B) A gas is released C) NH4SO4 will precipitate from solution D) KNO3 will precipitate from solution E) No reaction ...
October 15, 2014 by mathew

chemistry
If 10.0 g of CaCO3(s) is heated, 5.61 grams of solid CaO will remain (4.39 g CO2 gas is driven off) If 3.25 g of NaCl(s), which does not undergo decomposition, is mixed with 5.30 g of CaCO3(s) and the mixture is heated long enough to decompose all of the calcium carbonate, how...
September 9, 2010 by Keenan Flemming

phys
The ammonia molecule has a dipole moment of . Ammonia molecules in the gas phase are placed in a uniform electric field with magnitude 1.1106 . What is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to from ...
January 30, 2013 by Anonymous

Math
A driver uses about 600 gallons of gas a year to get around his car. For how many years could he drive his car on all the gasoline that is being lost in one day as a result of this spill.. In one day 2,000,000 gallons spilled.
February 6, 2013 by Sarah

math/help
A driver uses about 600 gallons of gas a year to get around his car. For how many years could he drive his car on all the gasoline that is being lost in one day as a result of this spill.. In one day 2,000,000 gallons spilled.
February 6, 2013 by Nalini

chemistry
A manometer attached to a flask contains NH3 gas have no difference in mercury level initially as shown in diagram. After the sparking into the flask, it have difference of 19 cm in mercury level in two columns. Calculate % dissociation of ammonia. (1) 21% (2) 22% (3) 24% (4...
May 5, 2013 by Anonymous

Chemistry
What is the sign of the entropy change for the following reaction, which is the principal process taking place when mortar hardens? Ca(OH)2(s) + CO2(g) ---> CaCO3(s) + H2O(l) Would the sign of entropy be negative since a solid and gas yields a solid and what does it mean by...
August 4, 2015 by D

chemistry
When 86.7 g of water at a temperature of 73 C is mixed with an unknown mass of water at a temperature of 22.3 C the final temperature of the resulting mixture is 61.7 C. What was the mass of the second sample of water? (Specific heat of water 4.184 Jg-1C-1)
April 9, 2013 by Anonymous

chemistry
When 86.7 g of water at a temperature of 73 C is mixed with an unknown mass of water at a temperature of 22.3 C the final temperature of the resulting mixture is 61.7 C. What was the mass of the second sample of water? (Specific heat of water 4.184 Jg-1C-1)
April 9, 2013 by Anonymous

Math
In science class, Savannah measures the temperature of a liquid to be 50^@ Celsius. Her teacher wants her to convert the temperature to degrees Fahrenheit. What is the temperature of Savannah's liquid to the nearest degree Fahrenheit?
November 16, 2015 by Claire

Chemistry
Please show me how to work! Ethane, C2H6(g) can be made by reaction of hydrogen gas with acetylene, C2H2(g). the standard enthalpies of formation of ethane and acetylene are -84.68 and +226.73 kJ mol-1, respectively. what is the reaction enthalpy for the production of one mole...
October 20, 2012 by Sam

Science
Calculate the mass of O2 produced of 3.450g potassium chlorate is completely decolmposed by heating in the presence of a catalyst (Magnese dioxide).
July 4, 2011 by Tamara

Chem
how can the concept of specific heat capacity of water be used to explain the heating and cooling patterns of oceans and climate on the plane?
January 22, 2012 by Skye

CHEMISTRY
If precipitation of BaSO4 is incomplete due to inadequate heating or insufficient time what will happen to the sulfate percent error determination? And why?
October 12, 2014 by Paulie B.

math
The buying and selling commission schedule shown below is from a well-known online discount brokerage firm.? Taking into consideration the buying and selling commissions in the schedule find annual rate of interest earned by each investment? Transaction Size Commission Rate $0...
May 2, 2013 by b

Geography
For this question, you need to apply what you learned about temperature controls to two locations on Earth. Discuss how the 5 factors influencing temperature patterns effect St. Louis, Missouri (3839' N, 90W; elevation 535 ft) and Singapore (124'N, 10355'E; elevation 16ft...
September 28, 2013 by Lexi

Biology
hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind affects body ...
November 9, 2012 by Cara

chemistry
I am given the following reaction: 2NH3(g) -------> N2(g) + 3H2(g) My question is: 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture has 4.2 mols of ...
May 26, 2008 by ChemTeach

chemistry
I am given the following reaction: 2NH3(g) -------> N2(g) + 3H2(g) My question is: 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture has 4.2 mols of ...
May 26, 2008 by Shivani

Chemistry [Science]
Oh gosh... I need help, with like everything... [Show all work] Aluminum nitrite & ammonium chloride react to form aluminum chloride, nitrogen gas and water. What amount of aluminum chloride is present after 43g of ammonium chloride have reacted completely? I
May 3, 2010 by Nikki

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

physics
An aluminum calorimeter of mass 400g contains 200g of water at a temperature of 18celcius.When a block of nickel at a temperature of 80celcius is dropped into the waterthe final temperature of the mixture becomes 28celcius. Find the mass of the nickel.
April 18, 2015 by Anonymous

calculus2
Iron wreck temperature 30 oC fed into the electric furnace , 20 minutes later the temperature to 150 C . when the casting temperature 1200 o C , how long the iron melting process in an electric furnace in the air at the time when tempelatur 270C .
March 27, 2016 by drJon

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

someones GOTTA help me with this science...!!!
1. Which of the following describes the correct sequence of events during the water cycle? (1 point)precipitation condensation evaporation runoff condensation precipitation runoff evaporation runoff condensation evaporation precipitation evaporation...
January 20, 2014 by TTR+S<3

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

math
The circle graph represents a familys monthly budget. If the monthly budget was 5,000, how much does the family spend on items other than food and housing? The graph has 50% other and 20% food and 30% housing. A.1,000 B.1,500 C.3,500 D.2,500*
March 15, 2016 by Plzzzzzzzzz Help

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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