Sunday
April 20, 2014

Search: density/ethanol

Number of results: 9,158

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.
Sunday, June 27, 2010 at 7:02pm by jimbo

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....
Tuesday, November 29, 2011 at 9:24pm by Shelly

chemistry
Calculate the molarity and mole fraction of a 2.35 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the final volume equals the sum of the volumes of acetone and ethanol.
Tuesday, May 4, 2010 at 2:00pm by bob

chemistry
Calculate the molarity and mole fraction of acetone in a 1.29 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.
Thursday, January 20, 2011 at 8:51pm by sarah

Chemistry
What is the mass/ vol% ethanol in an ethanol water solution with density of 0.875g/ml and containing 65% ethanol by volume? The density of pure ethanol is 0.789g/ml? My calculation 0.875g/ml x 1000ml x 0.65/ 46.06 = 12.34m 12.34/0.789g = 15.6g I am not sure answer. Pls help
Saturday, August 18, 2012 at 10:20pm by Fai

chemistry
You have a solution that contains 340ml of water and 20ml of ethanol. Find the concentration of ethanol in this solution in each of the following units: (density of water is 1.00 g/ml, density of ethanol is 0.789g/ml)
Tuesday, February 18, 2014 at 5:02pm by Anonymous

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?
Monday, November 28, 2011 at 10:32pm by Shelly

Chemistry
At room temperature, ethanol's density is 0.789 g/mL while water's density is 0.997 g/mL. When a few milliliters of ethanol are added to water, the two liquids mix. A student is given a unknown liquid at room temperature and experimentally determines its density to be 0.947 g/...
Wednesday, January 16, 2013 at 1:46am by John

Science
You will require 0.873*0.768 = 0.6705 moles of ethanol. Its molar mass is 46 g/mol, so that is 30.84 g. Divide by the density of ethanol to get the ethanol volume, in ml.
Friday, March 8, 2013 at 12:51am by drwls

science
Given that 6.20 x 10^23 ethanol molecules have a mass of 46.04g calculate the number of ethanol molecules in a film of ethanol that is 3.08 mm by 0.0015 mm. Assume the density of ethanol is 0.790 g/mL please helppp
Tuesday, August 28, 2012 at 3:06pm by anonymous

Chemistry
Use density to convert 125.0 mL ethanol to grams. mass = volume x density q = mass ethanol x deltaHvap = ??
Wednesday, January 19, 2011 at 11:43am by DrBob222

chemistry
An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.
Monday, November 12, 2007 at 10:43am by mark

Chemistry #11
A solution of ethanol (C2H5OH) is prepared by dissolving 35.0 ml of ethanol in enough water to make 120.0 ml of solution. What is the molarity of the ethanol in this solution? 46.07 g= molar mass of ethanol .079 g/ml=density
Monday, October 14, 2013 at 11:15pm by Chelsea

Chemistry
A bottle of wine contains 11.4% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
Sunday, September 23, 2012 at 8:55pm by Erin

Chemistry
Yes, you are right about density and no, I don't get those answers. For that density sentence I punched x instead of / button. density = mass/volume and volume = mass/density. 50 g ethanol has v = 50/0.789 or about 60 mL (but you need to do it more accurately). Water has ...
Tuesday, November 29, 2011 at 9:24pm by DrBob222

AP Chemistry
A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
Sunday, November 14, 2010 at 11:56pm by Anonymous

chemistry
60% (m/m)=60g of ethanol out of 100g in solution. 60g of ethanol*(1 mole/46.07g)= moles of ethanol Density=mass/volume Solving for volume, Volume=mass/density Total volume=100g total solution/0.8937g/ml Molarity=moles/volume in L Molarity of ethanol solution=moles of ethanol/...
Monday, July 29, 2013 at 1:35am by Devron

Chemistry
It would have helped to give the data below. Here is how you do the problem. I assume there is a density. Use the density to calculate the mass. mass -= volume x density. Then for heat used there are two formula to use. Within a phase you use mass x specific heat x (Tfinal-...
Thursday, March 8, 2012 at 6:40pm by DrBob222

CHEMISTRY
An ethanol-water solution is prepared by dissolving 10.00 ml ethanol C2H5OH (density=0.789g/ml) in sufficient water to produce 100.00 ml of solution with a density of 0.982g/ml. What is the concentration of ethanol in this solution? Expressed as ml. a.)%volume b.)%mass c.)%m/v...
Wednesday, November 13, 2013 at 8:00am by ADRIAN

Chemistry
Mass of unknown solution=25.671 Mass ethanol =8.243 Assuming that prior experiments have shown the single-step extraction removes only 72.0 % of the ethanol, the mass of ethanol in your original unknown is 11.45 Mass percent ethanol =44.6 % Given a density of 0.789 g/mL, what ...
Sunday, January 29, 2012 at 10:18pm by Forrest

chem-Bob
What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant. mass*gis the weight of the column density*h*area*g= weight density*h*g= pressure Thanks for your help Bob. The answer i got is...
Sunday, October 17, 2010 at 10:14pm by chris

CHEMISTRY
ETHANOL (C2H5OH) HAS A DENSITY OF 0.80g/ml. IF A 10%(v/v) MIXTURE OF ETHANOL IN WATER WAS PREPARED HOW MANY GRAMS OF ETHANOL WOULD BE IN 100ML OF THE MIXTURE? (ASSUMING MIXED VOLUME IS THE SUM OF THE PARTIAL VOLUME)
Monday, April 25, 2011 at 10:40pm by PLEASE HELP!

Chemistry
You can Google gasoline density and ethanol density to find that information. We don't give answers that we believe the students can readily find for themselves. After you find the densities of gasoline and ethanol, then post them, and BobPursley or another teacher will help ...
Thursday, September 20, 2007 at 9:08pm by Ms. Sue

Chemistry
An aqueous solution of ethanol is 14.1M C2H5OH. The density of the solution is 0.853g/mL. What is molality of ethanol in the solution? What is mass % of ethanol in solution? I got the molality which is -21.7 ethanol, but I can't figure out how to get the mass % from the molality?
Monday, January 14, 2013 at 2:51pm by Robert

Chemistry
How much heat is required to convert 32.5 grams of ethanol at 28 C to the vapor phase at 78 C? Ethanol (C2H5OH) boils at 75 C. Its density is 0.789 g/mL. The enthalpy of vaporization is 38.56 kJ/mol. The specific heat of liquid ethanol is 2.3 J/g-K.
Thursday, February 11, 2010 at 9:24pm by Anonymous

Chemistry
What is the mass of 65.0mL of ethanol? the density of ethanol at room temperature=0.789g/mL
Friday, January 20, 2012 at 8:12pm by Unknown

Chemistry
What is the mass of 65.0mL of ethanol? the density of ethanol at room temperature=0.789g/mL
Friday, January 20, 2012 at 8:12pm by Tiffany

Chemistry
A solution of ethanol (C2H5OH) in water is prepared by dissolving 76.9 mL of ethanol (density 0.79 g/cm^3) in enough water to make .250 L of solution. What is the molarity of ethanol in this solution?
Thursday, May 6, 2010 at 10:31am by Anonymous

Science
Assume you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water). What is the volume of ethanol required to heat 100 mL of water by 10 degrees C? (You will need to look up density of ethanol, specific heat capacity or water, ...
Thursday, March 21, 2013 at 2:08am by Alexandra

chemistry
if i mix 15ml of ethanol and 5ml of water into 20ml vol flask. Mass of flask with solution is 50g and mass of empty flask is 40g. How do i calculate the density of ethanol and density of water separately
Wednesday, February 10, 2010 at 8:30pm by blasting

chemistry
I converted ethanol using it's density, so I got mass=(.7893 kg/L)(3.41 L)=2.691513 g ethanol then plugged it into m=#mols solute/kg mass solvent to solve for # mols of solute which I got to be #mols=(11 m)(2.691513 g ethanol)=29.6066 Now do I take this and multiply it with ...
Tuesday, March 2, 2010 at 11:14pm by Anonymous

Chemistry
a) Convert 125.0 mL ethanol to grams using density and mass = volume x density. Then grams ethanol x heat vaporization (in calories/gram) = heat required. b)time (minutes)= cal heat required x (1 min/1.24 kcal) = ??
Tuesday, September 1, 2009 at 10:41pm by DrBob222

Chemistry II
A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0 mL of solution. What is the molarity of the ethanol in this solution? definition of molarity = #mols/L. mass ethanol = m = volume x density = 61.0 mL ...
Monday, April 16, 2007 at 9:46pm by Jayd

chemistry
I don't believe density has anything to do with it. The density of n-propanol is less than that of water, also (although it is slightly greater than that of ethanol). Thanks for the clarification of the experiment in the follow up. If I read this right, you made standards of ...
Monday, February 10, 2014 at 11:16pm by DrBob222

physics
What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational
Sunday, October 17, 2010 at 9:43pm by chris

chemistry
what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, June 29, 2011 at 10:02am by cindy

chemistry
what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, June 29, 2011 at 1:00pm by cindy

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, July 6, 2011 at 9:10am by Tim

chem
What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
Wednesday, July 6, 2011 at 7:30pm by Carol

chemistry
Ethanol has a density of 0.780 g/mL. What volume would 500. grams of ethanol occupy. Answer with correct number of sig figs
Tuesday, January 31, 2012 at 7:05pm by kr

chemistry
What mass of CO2, a greenhouse gas, is produced per liter of each fuel (assuming complete combustion) I got this data density of ethanol = 0.785 g/mL density of octane = 0.699 g/mL Ethanol) C2 H5 OH + 2O2 -> 2CO2 + 3H2O delta H combustion ethanol = -1234.8 Kj/mol Octane) ...
Thursday, October 13, 2011 at 4:15pm by sari

CHEMISTRY
c. You have 40.0 g ethanol in 40+60 = 100 g soln. You know the density of the solution; volume = mass/density and convert to L. You have moles ethanol from an earlier part. M = moles/L soln. d. pi = MRT
Sunday, March 18, 2012 at 4:50pm by DrBob222

CHEMISTRY
C6H12O6= 2C2H5OH + 2CO2 WITH 1KG OF GLUCOSE, WHAT IS THE MAX AMOUNT OF ETHANOL (INGRAMS OR LITERS) THAT CAN BE OBTAINED BY THE PROCESS. (DENSITY OF ETHANOL= 0.789g/ml.
Sunday, April 17, 2011 at 11:43am by DANA

chemistry
What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
Monday, October 17, 2011 at 12:17am by james

Chemistry
What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
Monday, October 17, 2011 at 1:10am by Sven

chem
A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 240.0 mL of solution. What is the molarity of the ethanol in this solution?
Saturday, November 3, 2007 at 11:31pm by mel

Chemistry
A solution of ethanol (C2H5OH) in water is prepared by dissolving 61.9 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Wednesday, October 27, 2010 at 11:58pm by Andrea

chemistry
A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.4 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Monday, January 3, 2011 at 4:42pm by bob

Chemistry
You need to find the arrow button and use it with equations. --> or ==> or >>>. I think the first thing to do is to convert 12% v/v to grams ethanol. That is 12 mL ethanol/100 mL soln. Scale that up to 712 (I guess we assume ALL of the grape juice is glucose ...
Tuesday, November 13, 2012 at 7:56pm by DrBob222

Chemistry
Ethanol burns to produce 1300.0 kJ/mol and has a heat capacity of 65.6 J/molK. If Dr. Porter has 1.00 L of liquid ethanol (density = 0.789 g/mL), what is the minimum mass of fuel that should be removed and burned to heat the remaining ethanol from 25 C to 90 C? (Assume the ...
Tuesday, November 9, 2010 at 7:34pm by Melissa

chem
mass = volume x density. Use this to calculate the mass of ethanol. mols ethanol = grams/molar mass. M = mols/L = mols ethanol/0.240 L = ??
Saturday, November 3, 2007 at 11:31pm by DrBob222

AP CHEMMMM
A bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent _______% molality ______mol/kg Thanks
Saturday, November 29, 2008 at 10:22pm by Lawrence

college chem
. Jack Daniels Tennessee whiskey is 40.00% ethanol by volume. However, % alcohol by mass is quite different from % by volume. The molality of ethanol in an aqueous solution that is 40.00 % ethanol by volume is 10.88 molal. A) Find the % ethanol by MASS, based on the molality. ...
Tuesday, March 9, 2010 at 11:11pm by josh

chemistry
ethanol is a common laboratory solvent and has a density of 0.789 g/ml what is the mass in grams of 139 mL of ethanol
Monday, September 3, 2012 at 12:22pm by baRRY

chemistry
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass in gram of 123 mL of ethanol?
Tuesday, September 11, 2012 at 4:22pm by Anonymous

Chemistry
Determine the molar concentration of ethanol (C2H6O) in a wine that is 14% ethanol by mass. The density of this wine is 0.93 g/cm^3.
Saturday, October 3, 2009 at 4:50pm by Anonymous

chemistry
Use density of ethanol to convert mL ethanol to grams. Then mol = grams/molar mass. Then M = mols/L solution.
Monday, March 11, 2013 at 7:19am by DrBob222

chemistry
you have 23- grams sample of ethanol with a density of 0.7893g/ml what volume of ethanol do you have?
Monday, September 27, 2010 at 8:08am by trice

science
what is the mass of a 257 mL sample of ethanol (ethyl alcohol) at 20 centigrade ? The density of ethanol at 20centigrade is 0.789 g|mL .
Thursday, August 11, 2011 at 8:48am by Anonymous

chemistry
You have a 22 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have?
Tuesday, September 14, 2010 at 7:42pm by Anonymous

chemistry
You have a 22 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have?
Monday, August 15, 2011 at 7:57pm by patricia

chemistry 2
What is the molality of a solution that has 80 grams of Benzoic Acid dissolved in 400 mL of ethanol. The density of ethanol is .789 grams/moles
Thursday, November 11, 2010 at 9:59pm by MICHELLE

chemistry
What is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175 mL of ethanol? (Density of ethanol is 0.789 g/mL
Tuesday, November 29, 2011 at 3:11am by katie

Chemistry
someone help pls!! percentage of ethanol in the "blood" sample on a v/v basis is 0.0143% v/v. is the "blood" sample analysed over the limit for driving? (legal limit is 80mg alcohol per 100mL blood. assume the density of ethanol is 0.785g/mL and the density of blood is 1.0g/mL...
Sunday, October 21, 2012 at 2:48am by Becky

Science
Ethanol has a density of 0.789 grams per centimeter ubed. How many cubic centimeters of ethanol must be poured into a graduatedcylinder to equal 30.3 grams?
Sunday, October 4, 2009 at 4:43pm by Wanda

chemistry
In an experiment, ethanol standards and an n-propanol standard were to be prepared in water. The ethanol standards were weight% and the n-propanol could be either v/v or weight%. One of the questions for the report asks why it was ok to make the n-propanol a v/v%. I overheard ...
Monday, February 10, 2014 at 11:16pm by solution chemistry

Chemistry
For ethanol, C2H5OH, which is mixed with gasoline to make the fuel gasohol, Hf = -277.63 kJ/mol. Based upon data in Table 6.2, and that the density of ethanol is 0.787 gcm-3, the number of kilojoules released by burning completely 2.40 gallons of ethanol is ? *Table 6.2 ...
Sunday, October 16, 2011 at 5:26pm by A

chemistry
What is the mass percent of a solution if 42.9 grams of aspirin is dissolved into 175 mL of ethanol? (Density of ethanol is 0.789 g/mL) 1. 31.1 % 2. 24.5 % 3. 23.7 % 4. 19.7 %
Tuesday, November 29, 2011 at 3:12am by katie

CHEMISTRY MOLALITY!!!!!
A bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. i don't know how to get molality. please help!!!! Molality is the number of moles of solute ...
Saturday, March 31, 2007 at 10:39pm by Anonymous

chem
C6H12O6(aq)->2 C2H5OH(aq) + 2CO2(g) Fermentation of 744mL grape juice(density=1.0 g/cm^3) is allowed to take place in a bottle witha V of 825mL until 12% by volume is ethanol (C2H5OH). Assuming CO2 is insoluble in H2O what would the pressure be of the CO2 inside the wine ...
Friday, November 16, 2007 at 1:27pm by mel

Science
Ethanol (grain alcohol) has a density of 0.789 grams per centimeter cubed, How many cubic centimeters of ethanol must be poured into a graduated cylinder to equal 30.3 grams?
Tuesday, January 10, 2012 at 4:38pm by Cedquandra

Chemistry
Use density to convert mL ethanol to grams. Use density to convert mL H2O to grams. heat gained by ethanol + heat lost by H2O = 0 [mass ethanol x specific heat ethanol x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0 Substitute and solve for Tfinal.
Thursday, February 9, 2012 at 3:34am by DrBob222

I have posted this so many times..can someone help
You have a 22 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have?
Wednesday, October 11, 2006 at 5:48pm by lisa

Chemistry
Calculate the mass of ethanol (m) used from the volume and the density. Calculate the RMM for ethanol Then use m/RMM to calculate the number of moles (M) of ethanol. I presume the final volume is 0.250 L rather than 250 L. The molarity is then M/0.250 L
Thursday, May 6, 2010 at 10:31am by Dr Russ

Chemistry: Dr. Bob, can you check my work?
I would use the volume of the bottle minus the volume of the ethanol. We're assuming all of the grape juice was glucose and all of it was converted to ethanol. Actually, since the grape juice was only 12% ethanol, I suppose the rest of it is water. The author of the problem ...
Thursday, November 15, 2012 at 12:16am by DrBob222

to dr bob..chemistry
bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent _______% molality ______mol/kg Thanks Responses AP CHEMMMM - DrBob222, Saturday...
Sunday, November 30, 2008 at 11:28am by Lawrence

Chemistry
What volume of ethanol must be diluted with water to prepare 768 mL of 0.873 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
Friday, March 8, 2013 at 12:49am by Agnes

Science
What volume of ethanol must be diluted with water to prepare 768 mL of 0.873 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
Friday, March 8, 2013 at 12:51am by Agnes

Chemistry
Use density = mass x volume to convert 50 g ethanol to volume and to convert 50.0 g H2O to volume. %ethanol v/v = (volume ethanol/total volume)*100 = ?
Monday, November 28, 2011 at 10:32pm by DrBob222

chemistry
I would expect the density to become smaller. density = mass/volume. Upon heating, the volume of ethanol will expand somewhat but the mass will not change. A larger number in the denominator will make the density less.
Thursday, July 8, 2010 at 6:33am by DrBob222

AP CHEMMMM
I suppose you are to assume the density of the ine to be 1.00. I looked up the density of wine on the Internet and found that it varies between about 0.990 to 1.01 so 100 mL would have a mass of 99 to 101 which isn't that far from 100. So 13.1% v/v means 13.1 mL ethanol/100 mL...
Saturday, November 29, 2008 at 10:22pm by DrBob222

chemistry
It would have helped if you wrote the equation. 2C2H5OH + 5O2 ==> 4CO2 + 6H2O 1.25 L H2O has a mass of 1.00 gram. 1.00 g H2O = ?? mols H2O. Convert mols H2O to mols C2H5OH using the coefficients in the balanced equation. Convert mols ethanol to grams ethanol. Using the ...
Friday, October 10, 2008 at 11:19pm by DrBob222

AP Chemistry
12.5% by volume means 12.5 mL ethanol/100 mL of solution. Don't we need the density of the wine in order to calculate the mass of the 100 mL? We can estimate if we assume ethanol and water volumes add (and I KNOW they do not). 12.5 mL ethanol in (12.5 mL ethanol+ 87.5 mL water...
Sunday, November 14, 2010 at 11:56pm by DrBob222

chemistry
The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step . Molar mass of ethanol = 46.07
Monday, July 29, 2013 at 1:35am by kaksha

Chemistry
0.000341 g fluorescein (332.32 g/mol) is dissolved in 255 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)?
Monday, July 16, 2012 at 8:26pm by Anon

science(chem)
I wonder how you weighed the 0.85018 g? With conc H2SO4, you almost are forced to use the density if you want to measure a volume for 1 mL does not have a mass of 1 g. And you are right for ethanol, it isn't so necessary since the density of ethanol is about 0.8 or so if I ...
Wednesday, October 1, 2008 at 10:40pm by DrBob222

Chemistry
Listerine mouthwash has 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash ?! ( the density of ethanol is 0.789 g/mL.) how would yu do this problem ?!?!
Saturday, July 24, 2010 at 12:24am by Nicole

chemistry
Listerine mouthwash is 21.6%ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash? (The density of ethanol is 0.789 g/mL.) Answer in units of grams
Wednesday, September 19, 2012 at 5:05pm by cheri

Chemistry
When doing a simple distillation of ethanol-water, is the vapor pure ethanol or does it also contain water? (knowing that ethanol has lower boiling point than water) If it is not pure ethanol, why is it not possible to separate water & ethanol completely? Thanks in advance.
Wednesday, January 4, 2012 at 9:28pm by Namie

chem
calculate the number of grams of alcohol present in 1.70 L OF 75-Proof gin. The density of ethanol is 0.798 g/ml. Proof--> twice the % by volume of ethanol(C2H5OH) present.
Friday, January 28, 2011 at 4:24pm by help!

AP Chemistry
Listerine mouthwash is 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash? (The density of ethanol is 0.789 g/mL.) Answer in units of grams
Wednesday, September 11, 2013 at 6:16pm by Gabriella

Chemistry
grams ethanol = volume x density. moles ethanol = grams/molar mass. M = moles/0.250 L = ??
Wednesday, October 27, 2010 at 11:58pm by DrBob222

chemistry
1.29 m means 1.29 moles/kg solvent. molar mass acetone about 58 molar mass ethanol about 46 You need to redo all of this since I've estimated some of these numbers. Take enough solution to have 1.29 moles which means you take 1 kg solution. 1.29 x 58 = about 75 grams acetone. ...
Thursday, January 20, 2011 at 8:51pm by DrBob222

Chemistry
You dissolve 20.0 gms of sucrose (sugar) in 200 mL of ethanol 20C (density of ethanol at 20C is 0.789 gm/ml). What is the mass % of the solute?
Monday, December 3, 2012 at 10:33pm by T

chemistry
What is the percent by volume (% v/v) of a solution made by mixing 12 ml of ethanol (C2H5OH) with 48 ml of water? b) Assuming the density of ethanol is 0.789g/ml, what is the molarity of this solution?
Tuesday, March 19, 2013 at 4:52pm by ben

math
what is the mass of 1.00 L of ethanol? Ethanol has a density of 0.798 g/ml. (hint: one liter is 10^3 mL.) A. 0.789 g B. 789 g C. 789 L I think C
Wednesday, November 7, 2012 at 3:47pm by shana

Chemistry #11
What's the mass of 35 mL ethanol. That will be mass = volume x density. Then mols ethanol = grams/molar mass = ? Finally M = mols/L solution.
Monday, October 14, 2013 at 11:15pm by DrBob222

chemistry
Look up the density of ethanol at 15.0oC and 30.5oC. It would make it easier if you found it in lbs/gallon but if not than you must convert. Then mass = volume x density.
Tuesday, October 6, 2009 at 1:21pm by DrBob222

Chemistry
The density of an aqueous solution containing 10% of ethanol (C2H5OH) by mass is 0.984 g/ml. A) Calculate the molality of this solution. B) Calculate its molarity. C) What volume of the solution would contain 0.125 mol of ethanol.
Wednesday, March 17, 2010 at 11:40pm by Hilavidpreet

Chemisty
How do I solve what is the mass of a 32.5 mL sample of ethanol if the density of ethanol is .789 g/mL. I know Mass = Density * Volume. So 32.5 mL * .789g/mL = the mass, but I don't know how to solve that.
Monday, August 26, 2013 at 12:02am by Brenda

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>

Search
Members