Thursday

July 24, 2014

July 24, 2014

Number of results: 47,607

**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**

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**

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 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**

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 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 4.2°C is mixed with 35.7 mL of water (density = 1.0 g/mL) initially at 25.3°C 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 6.4°C is mixed with 48.9 mL of water (density = 1.0 g/mL) initially at 29.1°C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
*October 15, 2013 by MK*

**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*

**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**

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**

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 g·mL–1) 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 g·mL–1. Note: For a mercury...
*October 28, 2012 by Garcia*

**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*

**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*

**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**

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*

**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 g·mL–1) 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 g·mL–1.
*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/cm³,the density of ice at -10˚c is 0.917g/cm³. 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*

**Chemistry**

How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc. mass Hg = volume x density Then convert to moles. Then remember there are 6.022E23 atoms for every mole. I still don't get how to do this! HELP ME!!!
*October 27, 2010 by Jessica*

**Chemistry**

The density of pure gold is 19.3 g/centimeter cube. A quantity of what appears to be gold has a mass of 465 grams and a volume of 26.5 mL. Is the substance likely to be pure gold? please tell me how you got your answer. Thanks! density = mass/volume You know mass is 465 grams...
*February 15, 2007 by Sarah*

**chemistry**

Kc = [Na+][Cl-]/[NaCl(s)] The above equation contains the concentration of NaCl in solid NaCl. This concentration is related to the density of solid NaCl and its molar mass. Since the density of NaCl or of any pure solid or pure liquid does not vary with the extent of a ...
*July 21, 2009 by jessica*

**chemistry**

The density of sulfuric acid, is 15.28 lb/gal. What is the density of sulfuric acid in grams per milliliter?
*January 17, 2012 by betty*

**Chemistry**

When 1.O M solution of NaCl at 25 degrees C, is heated to 55 degrees C the: A) density increase and the molarity increases B) density increases and the molarity decreases C) density decreases and the molarity decreases
*February 22, 2011 by Courtney*

**Physical Sciance**

Calculate the density for a rectangular block using the following measurements, Length: 2.70cm, Width:1.10cm, Height: 9.09cm, Mass: 72.17g. Round your answer for density to 2 decimal places. Include the correct unit for density.
*February 26, 2008 by Devin*

**physical chemistry**

how can i get the critical temperature of CO2 given a set of data which consists of surface tension and density at different temperatures. The table looks like this: T(oC) density surface tension 0 0.927 4.50 20 0.772 1.16 I really need some help about this...please...
*July 5, 2008 by kkk*

**science(physics)**

Density is the ratio of mass to volume. Mercury has a density of 1.36 x 10^4 kg/m^3. What is the density of mercury in units of g/cm^3?
*September 5, 2007 by jen*

**Chemistry**

Can someone please help me out here? I've tried several times and i keep getting the wrong answer :( lol A small crucible is filled with 100.00 mL of n-hexadecane (MW (226.44 g/mol), density (0.7703 g/mL)) and 2.10 L of 7-octenyltrichlorosilane (MW (245.65 g/mol), density (1....
*January 21, 2013 by Tawnya*

**Chemistry**

Pentane is a small liquid hydrocarbon, between propane and gasoline in size C5H12. The density of pentane is 0.626g/ml and its enthalpy of combustion is ΔHcomb =-3535kj/mol. Estimate the fuel valve and the fuel density of pentane.
*November 8, 2012 by Brittany*

**chemistry**

The density of sample measurements taken by a tech are: 0.810g/mL, 1.375g/mL, 2.046g/mL. The Actual density is 1.027g/mL. Are these measurements by the tech. precise accurate or neither or both Is the correct answer: Neither??? Thanks,
*October 10, 2011 by Connie*

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