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February 28, 2015

Search: a metal sample weighing 45.0 g and at a temperature of 99.1

Number of results: 21,153

physics
a metal wire has a resistance of 8 Ohms at a temperature of 20 degrees. if the same wire has a resistance of 8.40 Ohms at 70 degrees. What is the resistance of this wire in Ohms when its temperature is -10 degree celsius
November 13, 2013 by Anton

Chemistry
A sample of iron weighing 15.0 g was heated with potassium chlorate (KClO3) in an evacuated container. The oxygen generated from the decomposition of KClO3 converted some of the Fe to Fe2O3. If the combined mass of Fe and Fe2O3 was 17.9g,calculate the mass of Fe2O3 formed and ...
August 22, 2013 by Francis

Chemistry
The Densities of Liquids and solids O.k. so here is my problem. I will give you the whole problem just incase my mistake is somewhere else, but the volume for the metal and the density for the metal in the end seem to be wrong. (Density of unknown liquid) Mass of empty flask ...
August 22, 2007 by Sara

CHEMISTRY
As you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your friends are arguing over the cause of the sparking, with one stating that the microwaves "herd" electrons into "pointy" areas of the metal object, from which the electrons jump...
October 26, 2014 by KTM

Chemistry
When light having a wavelength of 497 nm strikes a metal coating of an emitter, an elector with kinetic energy of 2.52 x 10^-19 is ejected. What is the threshold frequency for this metal?
March 28, 2011 by Kamila

physics
A flexible metal sheet of length 6.0cm, breadth 5.00cm and the average thickness of 0.883cm has a mass of 23.00g. calculate the density of the metal
October 18, 2012 by betty

maths
from a rectangular piece of metal sheet of length and breadth 1.60 m and 80 cm respectively, 3 circular sheets of 20 cm radius are cut out. what area of metal is left?
March 23, 2013 by parth

physics
Light with a frequency of 4.32 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 5.8 eV. What is the work function (in eV) of the metal?
March 25, 2013 by John

Physics
When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV
April 23, 2013 by Sheila

chemistry
What are properties of metal and non-metal?
June 7, 2010 by Anonymous

chemistry
how do we determine Cmolar ,metal from Cs,metal
November 14, 2013 by Anonymous

math
(TEMPERATURE CHANGE) The rate at which the temperature of an object changes is proportional to the difference between its own temperature and the temperature of the surrounding medium. Express this rate as a function of the temperature of the object
November 12, 2011 by math

statistics
Your samle is normally distributed with a mean age of 57. The standard deviation iin this sample is 5 years.The 2000 census shows your sample is older than a randomly selected national sample. The median agein your sample is?
June 3, 2013 by statistics

chemistry
When a 16.9-g sample of NaOH dissolves in 70.0 g of water in a calorimeter, the temperature rises from 22.4C to 86.6C.
June 16, 2010 by kala

chem
when K temperature increases, the average kinetic energy of the particles in a sample do?
September 14, 2010 by montery

chemistry
At what temperature (oC) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1oC?
October 13, 2010 by kellie

Chemistry
At what temperature (oC) will a gas sample occupy 9.8 L if it originally occupies 14.2 L at 25.9oC?
October 17, 2011 by Sven

Chemistry
A 26.0 g sample of ice at -17.0C is mixed with 124.0 g of water at 81.0C. What is the equilibrium temperature?C.
April 3, 2014 by Eliza

Chemistry
The temperature of a 2.25L sample of gas decreases from 45.0'C to 20.0'C. What is the new volume?
May 17, 2014 by Han

Chemistry
My Chem professor is out for the weekend and I'm confused about what the question is asking or the equations needed... A 10.0-g block of pure nickel (Cp = 0.445 J/g-C) is brought to each of the temperatures below. A sealed beaker containing 15.0 g water at the temperature ...
January 26, 2013 by DeeDee

Analytical Chemistry (Titrations)
About 10ml of concentrated HCl was transferred to a 1-L volumetric flash and diluted to mark with distilled water. When this solution was used to titrate a sample of pure sodium carbonate, Na2Co3, weighing 0.3054 gram, it took 35.09 ml to reach the methyl red end point. The ...
September 23, 2014 by Alex

physics
A simple temperature model for the solar nebula disk is Tdisk(a) = 20 SQRT 100 AU/ a K, (1) where a should be expressed in AU in this equation. (a) Find the temperature in the solar nebula disk at the orbit of Mer- cury, Earth and Jupiter. (b) Where is the ...
November 13, 2014 by kathy

chemistry
What is the specific heat of a metal if 24.8 g absorbs 65.7 cal of energy and the temperature rises from 20.2 degrees celsius to 24.5 degrees celsius?
September 4, 2012 by jenn

physics
A 20 g sample of aluminum at 85 degree is dropped in 500g of water. The resulting temperature of aluminum and water is 25 degree. What is the initial temperature of water?
February 7, 2012 by joan

chemistry
When weighing liquid ethanol, why do you have to place water in the beaker prior to adding the ethanol to that same beaker? We were told to make a to make a 0.40% (wt/vol) stock solution by weighing 400 mg of absolute ethanol into a tared beaker that contained 15 mL of water ...
November 25, 2013 by Anonymous

physics
A metal rod is 40.125 cm long at 20 C and 40.148 cm long at 35 C. calculate the coefficient of linear expansion of the rod for this temperature range.
February 22, 2012 by selena

Chem 2
Need help.... calculate the theorectical yield of the compounds to be prepared in the experiment. The metal ion in both cases is the limiting reagent.Find nuber of moles of Cu(II) in the sample of CuSO4 x 5H2O that you used. The equal the number of moles of [Cu(NH3)4]x H2O ...
April 2, 2012 by Debbie

chemistry
Student A ran all her standards through the AAS at a specified C2H2/air flow rate. Just before she was to run her Cu sample, Student B turned down the flow rae of C2H2, thus lowering the flame temperature. Would students' A results of Cu in their sample be high, low or ...
March 26, 2012 by Jane

math
1. A submarine was suituated 800 feet below sea level. If it ascends 250 feet, what is it new position 2. Metal mercury at room temperature is a liquid. Its melting point is -39C. The freezing point of alcohol is-114C. How much warmer is the melting point of mercury than the...
July 31, 2014 by tsunayoshi

Chemistry 2
calculate the theorectical yield of the compounds to be prepared in the experiment. The metal ion in both cases is the limiting reagent.Find nuber of moles of Cu(II) in the sample of CuSO4 x 5H2O that you used. The equal the number of moles of [Cu(NH3)4]x H2O that could ...
April 7, 2012 by Debbie

AP CHEM (URGENT)!!!!!
How can ionization potential and electron affinity be used to predict whether or not a simple synthesis reaction will occur between a metal and a non-metal.
November 2, 2011 by Valm

Physics PLEASE HELP
When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV
April 24, 2013 by Sheila

Chemistry
(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21C. To heat the water sample to 41C, how much heat must you add to it? kJ (b) Consider the hypothetical reaction, being run in an insulated container that contains 102...
June 7, 2011 by Lance

chemistry
How much heat is necessary to raise the temperature of a 15.0g metal from 15 degrees celsius to 25.0 degrees celsius?
September 27, 2012 by rachel

Math
1)At 1 p.m., Lin records an outside temperature of 14.8F. At 3 p.m... she records the outside temperature and notices the temperature had increased by 22.6 degrees. What was the temperature that she recorded at 3 p.m.? ( no multiple choice) *my answer is 7.8* 2) (x - 16) + 5...
September 16, 2014 by Anonymous

Physics
A paladin howitzer fires a 46.00 kg projectile towards a 1000 kg metal block resting on a frictionless surface. Just before impact, the projectile is traveling with a horizontal velocity of 529 m/s. After the collision, the embedded projectile and the metal block move along ...
February 2, 2015 by Samiboo711

Chemistry
A sample of zinc metal reacts completly with an excess of hydrochloric acid: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) The hydrogen gas produced is collected over water at 25.0 C. The volume of the gas is 78.0 L & the pressure is 0.980 atm. Calculate the amount of zinc metal ...
August 12, 2011 by ChemLover

chemistry
A heater caused the temperature of a 550 g Aluminum block to change from 22 degrees C to 145 degrees C. How many calories were required to heat the metal block?
April 11, 2011 by cam

Chem/Physics
1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray with an energy of 0.16 MeV). An archaeological sample contained wood that had only 72 percent of the 14C found in living trees. What is its age? I got 500years? 2. The ...
October 15, 2008 by Anne

Math
A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4C and the lowest temperature was 7.6C. Write an absolute value equation that can be used to report the highest ...
January 6, 2015 by Alex

Math
A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4C and the lowest temperature was 7.6C. Write an absolute value equation that can be used to report the highest ...
January 11, 2015 by Alex

Chemistry
Can somebody help me with this question? Zinc metal is placed in a solution of copper ions and undergoes an oxidation-reduction reaction. Which direction is the spontaneous reaction? Zn metal goes into solution. Cu(II) ions come out. Zn + Cu+2 ==> Zn+2 + Cuo Zn metal is ...
February 10, 2007 by Lisa

calculus
A box is contructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $5 per square foot and the metal for the sides costs $2 per square foot. Find the dimensions that minimize cost if the box has a volume of 40 cubic feet.
April 14, 2014 by Griffin Bilskie

chemistry
The phosphorus in a completely dried fertilizer sample weighing 0.4498 grams was precipitated as MgNH4PO4*6H2O. The precipitate weight was determined to be 236.8 mg and ignited to Mg2P2O7. The weight of the ignited precipitate was 268.9 mg. Calculate the percent phosphorus. My...
August 31, 2007 by smiley

chemistry
a 60.0 g sample of chromium at 82.0 degrees celsius was place in 80.0 g of water. Assume there is no loss of heat to the environment. What is the final temperature of the water and chromium? The initial water temperature was 24.0 degrees celsius
November 12, 2013 by Anonymous

Chemistry
How do i calculate the amount of heat required to raise the temperature of an 89 sample of water from 40 to 60.
February 20, 2010 by Kesha

Chemistry
Calculate the amount of heat required to raise the temperature of a 54 g sample of water from 5C to 20.C.
September 15, 2010 by Ben

chemistry
Calculate the amount of heat required to raise the temperature of a 25 sample of water from 7 to 25.
September 20, 2010 by Anonymous

chemistry
a 25.0 sample of nitrogen has a volume of 50.0L and a pressure of 630. mmHg. what is the temperature of the gas?
March 29, 2011 by Anonymous

chemistry
at what temperature will a gas sample occupy 6.6L if it originally occupies 14.1L at 14.4 degrees celcius
June 29, 2011 by cindy

chem
If 7.59 moles of an ideal gas has a pressure of 4.41 atm, and a volume of 71.59 L, what is the temperature of the sample?
December 1, 2013 by dinah

chemistry
I did an experiment where i put iron nail with zinc metal wrapped around it in agar solution. the solution turned pink. I have to find the anode: anode reaction: cathode (remember, a metal can be an inactive electrode): cathode reaction (there arent any metal ions present, so...
March 10, 2009 by Anonymous

chemistry
A 50g chunk of metal (c=0.0506 j/gC) is heated to 60C. it is then dropped into a calorimeter(c=1.40 j/gC,m=5.0 g)that contains 100.0g of an unknown liquid. the temperature of the liquid raises from 15C to 20C.What is the c of the calorimeter?
September 23, 2014 by liz

chemistry
1. Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas, measured at 25 C and 0.980 atm, is produced by the decomposition of 62.5 g of sodium azide? 2. A gas sample in a container with a volume V at a ...
December 9, 2010 by Helen

physics
How does the resistance of a piece of metal change if both its length and its diameter are reduced to one half their original values? .. im confused because i dont know what the shape of the metal is...please help!
March 7, 2010 by Anonymous

Chemistry
If 200 g. of an unknown metal oxide, M2O3, upon reaction with chlorine yields 376 g of M2Cl2, then the metal M is: a. Indium b. Aluminum c. Gallium d. Silicon e. boron
May 5, 2011 by Kamila

chemistry
A block of metal is 6.88 cm long, 2.03 cm wide, and 1.85 cm high. It has a mass of 215.1 grams. What is the density of this metal. I've tried adding all the cm up and squaring them, dividing them, multiplying but i can't get the answer
February 6, 2015 by paige

chemistry
3. Based on your answer in question 2, determine the percent error of your calculated specific heat capacity value of your unknown metal using the specific heat capacities of known metals below. Metal Specific Heat Capacity Nickel 0.440 Tin 0.210 Silver 0.237 Magnesium 0.140 ...
April 4, 2013 by lex

chemistry
An engine goes through the following cycle with 2.60 moles sample of a diatomic gas. I. an isothermas expansion from point a to point b. II. a constant pressure compression from point b to point c. III. an adiabatic compression from point c to point a. We are given point a has...
December 7, 2009 by dan

physic
2. Rank the following in the order of how much of a corona discharge they would produce, from highest to least (e.g., if D is highest, then A, C, and B is lowest. enter DACB). Explain your response. a. a large round metal ball hooked to a high voltage battery b. a sharp metal ...
January 21, 2011 by sabrina

science
2. Rank the following in the order of how much of a corona discharge they would produce; from highest to least (e.g., if D is highest, then A, C, and B are lowest. entering DACB). Explain your response. a. a large round metal ball hooked to a high voltage battery b. a sharp ...
June 22, 2011 by i

CRC
A sample of ideal gas is in a sealed container. The pressure of the gas is 675torr , and the temperature is 28\, ^{\circ}C . If the temperature changes to 91\, ^{\circ}C with no change in volume or amount of gas, what is the new pressure, P_2, of the gas inside the container?
April 28, 2013 by Touch

chemistry
A 13.8 g piece of Zn metal was heated to 98.6 oC and then dropped in 45.6 g of water at 25.0 oC. Assuming that no heat is lost to the surroundings, determine the specific heat capacity of Zn if the final temperature of the water was 27.1 oC C=6461.39
April 25, 2013 by Chade

Chemistry
You have a metal tank containing 74.0 moles of nitrogen gas at a pressure of 15.0 atm. If the pressure is measured at a temperature of 25.0 C, then the volume of the tank must be ___ liters
October 23, 2013 by Daud

Math
If a metal bar at a temperature of 20 degree celcius is dropped in boiling water how long will it take for the bar to reach 98 celcius at a rate of 2 degrees per second
February 21, 2014 by Derek

science
a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by the hammer head, how much will its temperature increase?
April 8, 2014 by paige

physics
A sample of anthracite has a moisture content of 5% when mined and an energy density of 35 kJg-1 when completely dried. Assuming that during combustion, the temperature of the water in the un-dried coal is raised from 20.0oC to 100.oC, and then vaporized at 100.oC, estimate ...
March 10, 2010 by k

chemistry
Ideal Mixed Gas Law problems 1. What is the pressure generated by a mixture of 25.6 g SO2 and 12.6 g Ne in a container of 72.45 L and temperature of 131 K? 2. What is the pressure of a mixture of 5.80 moles Kr and 2.71 moles Xe in a container with a volume of 205.6 Liters and ...
February 23, 2015 by Theresa

Chemistry
A metal element (M) forms a hexadentate complex with the ligand ethylenediammine (en). Its formula is M(en)32+. The metal ion and the ligand do not absorb in the visible region of spectrophotometer and a 1.00 cm cuvette, the following absorbances were measured for various ...
August 13, 2012 by John

physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of copper heated at 80 degree...
July 31, 2012 by Anonymous

physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of copper heated at 80 degree...
July 31, 2012 by Anonymous

chemistry
Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011 % Pb by mass. How much of the water (in mL ) contains 165mg of Pb? (Assume a density of 1.0 g/ml.)
December 7, 2010 by Lisa, Help needed!

Chemistry
A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)
July 26, 2014 by Susan

Math (Ms. Sue! Anyone!)
1)At 1 p.m., Lin records an outside temperature of 14.8F. At 3 p.m... she records the outside temperature and notices the temperature had increased by 22.6 degrees. What was the temperature that she recorded at 3 p.m.? ( no multiple choice) *confused on this question* 2) (x...
September 15, 2014 by Anonymous

calculus
A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $4 per square foot and the metal for the sides costs $4 per square foot. Find the dimensions that minimize cost if the box has a volume of 50 cubic feet. ...
November 11, 2011 by saud

Calculus
A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $2 per square foot and the metal for the sides costs $7 per square foot. Find the dimensions that minimize cost if the box has a volume of 30 cubic feet. ...
November 13, 2011 by Kayla

intro chem HELp please
1. Zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5oC. Calculate the enthalpy change when 5 g of zinc metal is heated from 100oC to the point where the entire sample is melted. (The heat of ...
November 5, 2010 by John

math
1)At 1 p.m., Lin records an outside temperature of 14.8F. At 3 p.m... she records the outside temperature and notices the temperature had increased by 22.6 degrees. What was the temperature that she recorded at 3 p.m.? ( no multiple choice) *confused on this question* 2) (x...
September 15, 2014 by Anonymous

Physics
When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV Please someone help me out. Thank you.
April 22, 2013 by Sheila

chemistry Ap
How much heat must be added to 50.0g of aluminum metal at 25 degrees C to raise its temperature to 125 degrees C? I have about 20 of these left so if you can do this and work it out and show me how you did it it would be great so I can use it as a guide for the next 19. Thanks.
February 8, 2008 by mhaidar9108

PHYSICAL SCIENCE
A 1.0 kg metal head of a geology hammer strikes a solid rock with a velocity of 5.0 m/s. Assuming all the energy is retained by the hammer head, how much will its temperature increase?
November 2, 2007 by Sarah

algebra
a metal stays solid a fahrenheit temperature below 1756.7 degrees. determine (in terms of an inequality) Celsius temperatures for which the metals stays solid. use formula F=9/5C +32.
December 3, 2010 by norma

chemistry
The complete combustion of salicylic acid releases 21.90 kJ of energy per gram of salicylic acid. In a particular bomb calorimeter (initially at room temperature), the combustion of 0.1182 g of salicylic acid, in the presence of excess oxygen, causes the temperature of the ...
September 25, 2014 by korko

chemistry
Calculate the mass in grams for a gold sample that absorbs 225 to change its temperature from 16.0 to 36.0.
February 3, 2011 by Heather

chemistry
a sample of iron (35.0g) absorbs 5.50J. of heat. calculate the increase in temperature that occurs
November 3, 2011 by payton

Chemistry
how do i calculate the temperature in Celsius of a 3.50L,0.75 mole sample of ammonia at 1.0 atm of pressure
March 14, 2012 by Jerrad

Chem
You have a 46.0 G sample of H20 at a temperature of -58.0*C. How many joules of energy are needed to heat the ice to 95.3*C?
May 14, 2012 by Joel

chemistry
if a 3.72 gram sample of nitrogen occupies a 2.50 liter container at 1.08 atm, what is the temperature in Celcius?
January 24, 2013 by jessica

chemistry
What is the specific heat of an unknown substance if a 2.53 g sample releases 13.1 cal as its temperature changes from 25.5C to 21.3C?
April 17, 2013 by ching chong

Math
A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4C and the lowest temperature was 7.6C. Write an absolute value equation that can be used to report the highest ...
January 12, 2015 by Alex

chemistry
when aluminum metal reacts with iron (III) oxide to form aluminum oxide and iron metal, 429.6 kJ of heat are given off for each mole of aluminum metal consumed, under constant pressure and standard conditions. What is the correct value for the standard enthalpy of reaction in ...
December 2, 2008 by sylvia

Algebra I
A sample of radioactive material weighing 45 grams has a decay rate of 4.25% each day. The equation y = 45(2.7)0.0425t can be used to find the amount of material that still remains, where t is the number of days that have passed. Approximately what is the amount of material ...
March 22, 2011 by Sarah

Chemistry
If given: A 1.4470g sample of an oxide of gold was reduced with ethane to 1.2900g of gold metal. What is the simple formula of the original gold oxide?
September 18, 2007 by Cat

statistics
What are the sample median and the mode for males? The sample mean mark of the 50 male students is 8.30. If the sample mean for the entire sample is 8.42, what is the sample mean for the 75 female students?
September 12, 2012 by Maria

statistics
What are the sample median and the mode for males? The sample mean mark of the 50 male students is 8.30. If the sample mean for the entire sample is 8.42, what is the sample mean for the 75 female students?
September 12, 2012 by Maria

Physical science
A 1.0kg metal head of a geology hammer strikes a solid rock with a velocity of 5.0m/s. Assuming all the energy is retained by the hammer head, how much will its temperature increase?
November 8, 2010 by Anonymous

Chem
What equation can I use to solve this kind of problem? A metal undergoes electrolytic reduction according to ne- + Mn+ ===> M. What current (in Ampres) must be provided to deposit the metal at a rate of 1.914 mol/hr if n = 3?
March 30, 2008 by Ginger

Chemistry
I've got the specific heat of a metal for three trials. t1= .186 j/gdegrees C t2= .178 j/gdegrees C t3=.128j/gdegrees C the mean of the specific heat is .164 j/gdegrees C we're supposed to find which metal it is from a "CRC" handbook. I've tried and can't find any metal with ...
March 10, 2010 by Abdullah

Chemistry
Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012% Pb by mass. How much of the water in milliliters contains 145 mg of Pb? (Assume that the density of the solution is 1.0g/mL.)
November 30, 2010 by Kelsey G

chemistry
11.31) solve for the new pressure when each of the following temperature changes occurs, with n and V constant: a. a gas sample has a pressure of 1200 torr at 155 celcius. what is the final pressure of the gas after the temperature has droped to 0 celcius? 1200 x12 celcius/0 ...
June 27, 2010 by Jetta

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