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November 27, 2014

Search: Chemistry - Density

Number of results: 49,842

chemistry
given the density of helium is 0.1785g/cm3 and the density of argon is 1.784g/cm.3 estimate the density of neon
October 28, 2012 by Jessa

Chemistry
If the column of water in the water barometer fore to a height of 35ft, what would the atmospheric pressure be in mm Hg? mmH20X(density of water/density of Hg)= mmHg Density of water=0.99707 Density Hg=13.5340
February 11, 2011 by Brian

Chemistry
The mass of the earth is known to be about 5.98 X10^24kg assume that it is approx. spherical with an average diameter of 1.276X10^7 METERS. from these data calculate the average density of the earth(g/cm^3) could the earth be made mostly of water (density=1.00g/cm^3), abundant...
August 30, 2011 by ALISON

Chemistry
a) The element with the greatest density is osmium, which has a density of 22.6g/cm3. calculate the mass of 32.1 cm3 of osmium. Answer: 22.6g x 32.1 = 725.46 Did I have right answer? b) A team of students determined the density of a sample of wood to be 0.52g/cm3. A handbook ...
April 2, 2010 by Anonymous

Chemistry
The population of San Francisco is 750,000 in an area of 49 square miles. What is the population density in San Francisco? Express your answer in people per acre. ( 1mi(squared) = 640 acres ) 49 sq mi x (640 acres/1 sq mi) =?? acres. (Note that sq mi cancels leaving acres.) ...
September 13, 2006 by Jamie

Dobson
a)The element with the greatest density is osmium, which has a density of 22.6g/cm3. Calculate the mass of 32.1 cm3 of osmium. b)A team of students determined the density of a sample of wood to be 0.52 g/cm3. A handbook of chemistry reported the density of 0.548 g/cm3 for the ...
March 26, 2010 by Anonymous

chemistry
silver has density of 10.5 g/cm3 and gold has a density of 193.g/cm3 which liquid is denser silver and gold are liquids? That's news to me. You're given the ratios for density, which ratio is greater 10.5gm/cm^3 or 193gm/cm^3? It appears gold is over 18 times as dense as ...
September 10, 2006 by delonte

chemistry - density and error (check)
Calculate the density of earth and the density error. i got the answer 5.57*10^3k +/- 9.60 *10^7kg/m is that the correct answer? please help
January 24, 2011 by Farah

Chemistry
Can you convert density to moles? I am given the density of a substance [0.789 g/mL] but I need to know the number of moles for the equation. You cannot convert density to moles, unless you also know the volume and the molecular formula. (density) * Volume = mass = (# of moles...
December 28, 2006 by Alexandria

Math/Chemistry
The density of water i 1.00 g/cm^3. Express this density in lb/ft^3. (1 lb = 454 grams)
September 22, 2008 by Claire

chemistry
Answers for copper has a density of 8.92g/cm3 and nickel has a density of 8.90 . which one is denser
November 4, 2010 by Anonymous

Science (Chemistry)
The Average density of Earth is 5.52g/cm^3. What is its density in a. kg/m^3 b. lb/ft^3. Please help me set up these equations. Thank you!
June 13, 2011 by Grace

chemistry
nonane has a density of 0.79 g/mL and boils at 151 celsius. will it float or sink in water (density of 1.00 g/mL)
July 27, 2011 by melissa

chemistry
Convert a density of 2.74 x 103 g/L into a density with dimensions of kg/mL. please show how would this conversion be done.??
September 6, 2010 by Jack

science (density)
1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.
October 9, 2008 by Carly

science (density)
1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.
October 9, 2008 by Carly

chemistry
a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?
February 1, 2012 by victoria

Chemistry
a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?
September 3, 2013 by Elizabeth

Chemistry
a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?
September 3, 2013 by Elizabeth

chemistry
Water (density = 1.00 g/mL) will float on hexane (density = 0.95 mL).
April 3, 2011 by Anonymous

chemistry
one mole of a gas occupies 27.0 liters, and its density is 1.41g/l at a particular temperature and pressure. what is its molecular weight? What is the density at STP?
June 28, 2009 by Bobby

Chemistry
How can you solve for a derived unit involving density? I dont know what you mean. Density is a derived unit, no mater what the units used are. Do you have an example of what you are doing? Yes. What is the mass of a sample of material that has a volume of 55.1 cm^3 and a ...
January 18, 2007 by Whitney

Chemistry
the current U.S. penny is only 2.5% copper the remaining portion is zinc. Given the density of copper as 8.94 g/cm and the density of zinc is 6.57 g/cm, calculate the density of a penny.
September 11, 2014 by Devante

Chemistry
When a 1.1 gram ice cube is placed into a 10.0 mL graduated cylinder, the level of water inside the graduated cylinder raises 1.20 mL. What is the Density of the ice cube? My Work: Density = 1.1g/10.0 mL + 1.20 mL? my answer came out to be; Density= .0982 g/mL
September 3, 2014 by Alex

chemistry
Making the simplistic assumption that the dissolved NaCl(s) does not affect the volume of the solvent water, determine the constants m and b in the equation Molarity = m⋅density + b that relates the NaCl molarity to the NaCl(aq) density. Take the density of water to be 1...
May 28, 2013 by Anonymous

chemistry
If the atmosphere can support a column of mercury 760 mm high at sea level, what hright of a hypothetical liquid whose density is 1.40 times the density of mercy could be supported?
June 20, 2012 by Dallas

college chemistry
A certain metal crystallizes in a face-centered cubic arrangement and has a density of a density and atomic radius of 12.41 g/cm3 and 134.5 pm, respectively. Which element below is it?
February 23, 2014 by hershi

chemistry
Gallium Arsenide ---------------- The charge carrier density of GaAs at 31o C is 2.25x106 cm-3. What is the charge carrier density (in cm-3) at 175oC? (The bandgap of GaAs is 1.42 eV. ) I am trying with arrhenius relationship but get confused over "charge carrier density"
August 25, 2014 by WIlliam

chemistry
calculate the density of NO3 gas at 0.970mm Hg and 35C Take 1 liter. calculate n in PV=nRT then, density= mass/volume= (n*molmassNO3)/1liter. I STILL DONT UNDERSTAND HOW TO DO IT COULD U PLEASE EXPLAIN What don't you understand about PV = nRT and how that fits your problem. Or...
January 9, 2007 by TIFFANY

Chemistry
Density of a metal cube of dimension 10 inches X 10 inches x 10 inches is 8.05g/cm3. What is its mass? 10inches? isnt that 25 cm? So get the volume in cm^3 by multiplying the three dimensions in cm. Multipy that volume by density. Mass= density*volume
June 10, 2007 by Brooke

Ecology
What are the types of population density measure and how each may be determined? Airkon Population density is a measurement of the number of people in an area. It is an average number. Population density is calculated by dividing the number of people by area. Population ...
October 8, 2006 by airkon

chemistry
water has a density of 1g/cm3 ; if 2 different pieces of the wood are put into water which will float and which will sink ? Wood 'a' has a density of 1.19g cm3 Wood "b" has a density of .67 g/cm3 Explain your answer?
August 19, 2012 by maria

Chemistry;HELP
Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits. Mass m Density = -------------- or D = ------- Volume v Adjust the density formula and solve the problems below: m D = ------- Original ...
January 16, 2013 by Victoria

chemisrty
can anybody give me the density of arsenic oxide at STP is this the correct formula volume = mass/ density thanks Yes, but if you want the density, it is density = mass/volume. The number I have seen floating around on this board is 17.8 g/L but the density of a gas and the ...
February 4, 2007 by bex

chemistry
Density of phosgene gas, COCl2(MM=99) ander a certain condition is 4.5g/L. What is the density if H2S gas(MM=34) under the same conditions?
October 20, 2008 by annemarie

chemistry
Using the idea of atoms write a desciption of the difference between an element with a low density and an element with a hight density ???
August 23, 2012 by Maria

Chemistry
Why did you need to know the density of the bleach solution? Why didn't you measure the density of h2o2 solution as well? Stoichiometry lab problem
October 28, 2012 by HELP PLEASE

Chemistry
Average density of a copper-coated iron BB is 8.00g/mL. If the density for copper is 8.92 g/mL, and the density for iron is 7.43g/mL, what is the percentages of copper and iron in a BB?
September 11, 2008 by Heather

Chemistry
The density of a gas containing chlorine and oxygen has a density of 2.875 g/L at 754.5 mm Hg and 11(degress C). What is the most likely molecular formula of the gas?
March 28, 2011 by Toni Jones

Chemistry
Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?
January 23, 2011 by Anna

Chemistry
Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?
January 23, 2011 by Anna

Chemistry
If the density of a substance is 15.2 g/mL, what is the density in cg/kl?
December 31, 2011 by Ben

Chemistry II
what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm? Ok, I am little confused because I am not sure of where to plug in the density and the atm?
September 2, 2009 by Michelle

chemistry
Find the volume in liters. 6.5kg of a substance with a density of 7.96g/mL Im confused about how it would come out in liters.. if the mass is in kg and the density is in g/mL
March 5, 2011 by tammie

Chemistry HELP! IMLOST
The density of a gas containing chlorine and oxygen has a density of 2.875 g/L at 754.5 mm Hg and 11(degress C). What is the most likely molecular formula of the gas?
March 28, 2011 by Toni Jones

Chemistry 9
a) A 2.56 balloon contains 3.66 g of gas. Find the density b) A 45.3 g sample placed in a graduated cylinder causes the water level to rise from 25.0 mL to 41.8 mL . Find the density
October 22, 2012 by Seastone

chemistry
20mL ethanol(density=o.789g/mol) is dissolved in sufficient water to produce a 200mL solution. the density of the solution is 0.982g/mL. what is the molarity?
March 11, 2013 by mj

Chemistry;HELP
Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits. Mass m Density = -------------- or D = ------ Volume v Adjust the density formula and solve the problems below: m D = ------- Original Formula...
January 16, 2013 by Victoria

Chemistry
A bottle that holds 250 grams of water holds only 175 grams of gasoline. What is the density of the gasoline? Take the density of water to be 1.0 g/ml mass = volume x density. Rearrange to find volume = mass/density volume of the bottle = 250/1.00 = ?? Now that you know the ...
February 15, 2007 by Sarah

Chemistry
length in cm of one side of perfect cube of gold with a density of 18g/cc and mass of 25g? How would i set up this equation? I don't know what length formula I would use, because I know that i am not supposed to just divide the density by the mass, because that would be ...
September 24, 2011 by Bob

Chemistry
A column of mercury in a barometer is 767.3 mm Hg high. Note, that in order for the pressures to be equal, density and height of a column are inversely proportional, therefore, (den1)(h1)=(den2)(h2). The density of mercury is 13.6 g/mL and the density of water is 1.00g/mL. a) ...
April 16, 2014 by Carly

Chemistry I
25.0 mL of ethanol (density = 0.789 g/mL) initially at 4.2C is mixed with 35.7 mL of water (density = 1.0 g/mL) initially at 25.3C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
September 15, 2010 by Robbie

college chemistry
for my lab i used 2.0mL of NaOH solution and it doesnt have a density in (g/mL)... is there still a way to calculate the moles to it? unless there is a density to NaOH
March 19, 2013 by Anonymous

chemistry
If 51.6 mL of ethanol (density = 0.789 g/mL) initially at 6.4C is mixed with 48.9 mL of water (density = 1.0 g/mL) initially at 29.1C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
October 15, 2013 by MK

chemistry
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.5C is mixed with 32.3 mL of water (density = 1.0 g/mL) initially at 25.3C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
September 19, 2014 by Anonymous

chemistry
What is the density of a piece of zinc that has a volume of 8000 cubic cm? density= mass/ volume
September 21, 2014 by joe

H. CHemistry
if the atmosphere can support a column of mercury 760 mm high at sea level, what height of a hypothetical liquid whose density is 1.40 times the density of mercury could supported?
January 30, 2013 by Jenna

General Chemistry
If the pressure is 748 mmHg, and if h= 35mm, what is the pressure of the gas, expressed in atm, If the substance in the tube is oil having a density of 0.788 g/mL? The density of mercury is 13.6 g/mL.
October 26, 2014 by Sim

chemistry
What mass of sucrose should be combined with 491 g of water to make a solution with an osmotic pressure of 8.70 atm at 270 K? (Assume the density of the solution to be equal to the density of the solvent.)
August 5, 2010 by ashley

Chemistry
Hello everybody, I'm having difficulty understanding the rationalization behind the strengths of Bronstend Lowry acids and bases and my textbook isn't too helpful. Can someone please expalin to me: (1) What exactly is effective negative charge density? (2) how does ...
July 16, 2007 by John Peterson

Chemistry
At 20 degrees C ethanol has a density of 0.789 g/ml and H2O has a density of 1.0 g/ml. What is the % by volume of ethanol of a solution made by adding 50g of ethanol with 50g of H2O? Tutor Answer: Use density = mass x volume to convert 50 g ethanol to volume and to convert 50....
November 29, 2011 by Shelly

chemistry
A closed-tube manometer is filled with a nmineal oil whose density is 0.857 g/cm^3. What is the pressure in mm Hg if you measure a height of the mineal oil equal to 79.3 mm? The density of mercury is given as 13.586 g/cm^3.
November 13, 2011 by samn

Chemistry
I have this problem.... Hexane has a density of 0.659 g/ml. How many milliliters (mL) would a student need to pour in order to get 49.5 g of hexane? Am I to solve by using mass = density x volume? And if so, is the answer 32.62mL?
September 16, 2012 by Amanda

chemistry
If you wanted to make a barometer that had a column of liquid about 6 feet tall, what would the density of the liquid have to be? 1 meter = 3.28 ft 1 inch = 2.54 cm Density Hg = 13.6 g/mL 1atm = 760 torr
October 12, 2014 by jhon

Chemistry
I'm stuck on this one problem in Chemistry: A student measures the mass of an object as 2.32 grams and its volume as 34.56mL. The student then calculates the density to be 0.067129629. There are two things wrong with the students value for density. What are they? Now when I ...
September 14, 2007 by Chervonna

Density
Can you identify a metal if you know its density? Explain It depends upon how accurately the density is determined. In some cases, especially where the "unknown" has a density that isn't close to another metal, yes, the density can identify the metal with a high degree of ...
August 29, 2006 by John

chemistry
The organic compound di-n-phthalate is sometimes used as a low-density manometer fluid. Compute the pressure (in torr) of a gas that supports a 517-mm columns di-n-butyl phthalate . The density of mercury is 13.53 g mL-1.
May 2, 2013 by tonia

Chemistry
If you wanted to make a barometer that had a column of liquid about 6ft tall what would the density of the liquid have to be? 1meter=3.28ft 1in=2.54cm Density Hg=13.6g/ml 1atm=760torr
October 12, 2014 by Ana

Chemistry
Lithium is a soft, gray; solid that has the lowest density of any metal. If a rectangular slab of lithium weighs 1.49x10^3 mg and has a volume of 2.76 cm^3, what is the density of lithium in g/cm^3? Please and thank you!
June 25, 2011 by Mary

chemistry
Calculate the molar mass of a gas if 0.805g of this gas has a pressure of 4.00 bars at 305K in a 1 L. What is the gas density at this T and P, and what is the density at STP
September 11, 2009 by john

chemistry
If the density of a substance is 7.87 g/cubic cm, convert this density to g/cubic inches.
February 13, 2008 by Lindsay

Chemistry
The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 gmL1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 555-mm column of di-n-butyl phthalate. The density of mercury is 13.53 gmL1. Note: For a mercury...
October 28, 2012 by Garcia

chem
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a helium-oxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ? Responses chemistry - ...
September 26, 2008 by tomi

Science
What is the mass of 15mL sample of mercury? Look up the density of mercury. mass = volume x density. Make sure the density is in g/mL. If it isn't you will need to convert it. One place to find density of mercury is at www.webelements.com and click on element #80. I don't ...
November 16, 2006 by Crystal

Chemistry
Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems but the answer is ...
June 12, 2013 by xavier

college chemistry
Calculate the pH of a solution prepared by mixing 150.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 37.5 g of an aqueous solution that is 1.3% NaOH by mass (density=1.02 g/mL)
March 24, 2011 by does anyone get this???

Chemistry AP-Density
The density of osmium is 22.57g/cm3. If a 1.00kg rectangular block of osmium has two dimensions of 4.00cmx4.00cm, calculate the third dimension of the block.
August 17, 2010 by Victoria

College Chemistry
Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous solution that is 1.50% NaOH by mass (density= 1.02g/mL).
March 23, 2011 by Anonymous

chemistry
What is the mass/vol % ethanol in an ethanol-water solution with density of 0.875 g/ml and containing 65.0% ethanol by volume? The density of pure ethanol is 0.789 g/ml.
June 27, 2010 by jimbo

Chemistry/physics
i have a density of 1.9x 10 (negative cubed)g/cm cubed.and i have a mass of 50.0 g. do i need to convert my density in order to find my volume?
February 20, 2013 by Armoured sheperd

chemistry
25.6 {\rm mL} of ethanol (density =0.789 {\rm g}/{\rm mL}) initially at 8.0^\circ {\rm C} is mixed with 39.5 {\rm mL} of water (density = 1.0 {\rm g}/{\rm mL}) initially at 23.1^\circ {\rm C} in an insulated beaker. Assuming that no heat is lost, what is the final temperature ...
February 22, 2012 by MD

CHemistry....Please help
How would i calculate the density of Li2S in grams per cubic centimeter? I have to use the equation : density= mass/ volume: But i dont know how to find out the volume using the edge length of the unit cell which is 5.88* 10^2 pm.
January 25, 2009 by Saira

college chemistry
2h2o2(aq) ---> 2h2o(l) + o2(g) if someone puts 0.470 ml of hydrogen peroxide on a cut how many moles of hydrogen peroxide are used? Assume the density of the solution is equal to the density of water.
January 30, 2011 by Help please

chemistry
The ionic radii of Na+ (atomic weight 22.99) and Cl- (atomic weight 35.45) are 1.0 and 1.8 Angstrom, respectively. Treating the ions as hard spheres, calculate the density of NaCl. Compare this with the measured density of 2.17 g/cm3.
September 13, 2014 by john

chemistry
25.6mL of ethanol (density =0.789 g/mL) initially at 5.4∘C is mixed with 30.4mL of water (density = 1.0 g/mL) initially at 20.4∘C in an insulated beaker.Assuming that no heat is lost, what is the final temperature of the mixture?
September 12, 2014 by Lisa

Chemistry
A rock has a mass of 127 g and displaces 32.1 mL of water. What is the density of the rock? density=mass/volume watch units.
February 1, 2007 by Bryan

HELP!! Chemistry
1. Calculate the density of a material that has a mass of 52.497 g and a volume of 18.5 cm3. 2. A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock is 29.7 cm3, and the mass in 139.943 g. What is the density of the rock? 3. ...
October 23, 2013 by _Unknown

chemistry
Calculate the pH of concentrated hydrochloric acid if this solution is 24.8 % HCl by weight and has a density of 1.16 g/mL. a. ) -0.77 b. ) -0.83 c. ) -0.90 d. ) -0.98 e. ) -1.01 i got c) by converting density into concentration (mol/L) and then, multiplying by 0.248. next, i ...
November 2, 2008 by Anonymous

chemistry
Would a substance with a density of 7.89 kg/dm^3 float on a substance that has a density of 14.2 g/ml?
September 23, 2014 by Jim

phy
Calculate the density for a rectangular block using the following measurements. Length: 2.70 cm, Width: 1.10 cm, Height: 9.09 cm, Mass: 72.17 g. Round your answer for density to 2 decimal places. Include the correct unit for density. Show your work
May 18, 2011 by irtaza

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemtp at solution volume of oxygen= .209476*50L=10.5L How do i go from volume of ...
November 8, 2008 by jason

chemistry
Ariel found the density of an unknown solid to be 24.3 g/cm3. Her teacher told her that something must have gone wrong with her measurements because her percent error was 30.0% too high. What was the actual or accepted density of her unknown solid?
September 29, 2012 by Anonymous

chemistry
29.8 ml of ethanol (density = 0.789 g/ ml) initially at 9.9 degree celsius is mixed with 33.8 mL of water (density = 1.0 g/mL) initially at 27.8 degree celcius in an insulated beaker. Assuming that no heat is lost, what is the final temperature of mixture? How do I start this ...
June 22, 2014 by June

chemistry
The density of water at 30.0 C is 0.9956 g/mL. If the specific gravity of acetic acid is 0.1040 at 30.0 C, what is the density of acetic acid at 30.0 C?
February 1, 2013 by chelsy

Chemistry AP-Density
The level of water in a graduated cylinder is at the 100 mL mark. When a platinum crucible floats on the surface of the water, the level reads 157.9 mL. When the crucible is totally immersed in the same cylinder, the level reads 102.70 mL. What is the density of platinum? The ...
August 26, 2010 by Victoria

chemistry
The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 gmL1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 585-mm column of di-n-butyl phthalate. The density of mercury is 13.53 gmL1.
November 27, 2012 by anonymous

chemistry/help
In solid form, what element has the lowest density? Which has the highest density? 1. Hydrogen is the lowest density solid 2.which element has the highest?
June 3, 2012 by chris

chemistry
In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?
June 3, 2012 by chris

chemistry
At 25 degrees celsius, the dimensions of a rectangular block of gold are 4.42 cm by 3.07 cm by 2.63 cm. The mass of the gold is 689g. I found that the density is 19.3g/cm^3 at 25 degrees but how will the density change if the temperature is increased to 125 degrees?
September 30, 2010 by kate

chemistry
at 25˚c the density of water is 0.997g/cm,the density of ice at -10˚c is 0.917g/cm. if a soda can volume is 240 ml is filled then frozen at -10˚c, what volume does solid occupy?
February 1, 2011 by tom

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