Sunday

April 20, 2014

April 20, 2014

Number of results: 105,997

**chemistry**

Determine the density of each. density = mass/volume. The liquid with a density less than 1.00 (the density of water) will float.
*Saturday, June 25, 2011 at 10:18pm by DrBob222*

**chemistry**

The general gas law equation, PV = nRT, can be modified for density, so that one can calculate density without actually going through n. P*molar mass = density*R*T. Remember T must be in K. Solve for density.
*Wednesday, November 30, 2011 at 3:17pm by DrBob222*

**chemistry**

Density of water: 1.0 g/mL Principle: If an objects density is greater than water density, it will sink in water. If an object's density is lower than water density, it will float in water. Now, what will the liquid do? (I think you can figure it out from what I said above) If...
*Monday, September 1, 2008 at 12:55pm by ~christina~*

**chemistry**

I would look up the density of the solvents. I would assume a density of 1.00 g/cc for water since the problem specifies a dilute solution, then compare the density of the solvent with the density of water. Density greater than water the solvent sinks. Density lower than water...
*Tuesday, September 23, 2008 at 5:25pm by DrBob222*

**chemistry**

density = mass/volume Specific gravity is the same number (but no units) if you assume density of H2O = 1.00 g/mL. If you know the density of H2O at room T (I don't know what you're calling room T) then sp.g. = density substance @ T/density H2O at same T.
*Sunday, September 9, 2012 at 11:25pm by DrBob222*

**Chemistry**

You don't have enough information. You need the density of benzene, the density of CH3CN, and the density of the solution.
*Tuesday, September 2, 2008 at 2:45pm by DrBob222*

**Chemistry**

I would calculate the density (density = mass/volume) and compare to the density of the four possibilities.
*Saturday, November 20, 2010 at 7:34pm by DrBob222*

**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
*Sunday, October 28, 2012 at 4:14pm by Jessa*

**SCIENCE?CHEMISTRY*****

The volumes are the same. Volume in mass divided by density. (mass/density) of mercury = (mass/density) of alcohol Alcohol mass = [(alcohol density)/(mercury density)]*(mecury mass) = (0.900/13.6)*20 = 1.324 g Rouded to two figures, that is 1.32 g
*Friday, May 14, 2010 at 9:49pm by drwls*

**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
*Friday, February 11, 2011 at 1:45am by Brian*

**chemistry**

Specific gravity (S.G.)=Density of acetic acid/density of H2O Solve for density of acetic acid. S.G.* density of H2O=density of acetic acid (0.1040*(0.9956 g/mL)=S.G.
*Friday, February 1, 2013 at 1:55am by Devron*

**Chemistry**

I would subtract the density at 17 from the density at 18, take 0.3 of the difference, and add to the density at 18.
*Sunday, March 13, 2011 at 2:55pm by DrBob222*

**Chemistry**

Density= Mass/vollume Density= 25.75g/25.00ml density =1.030g/ml
*Monday, August 29, 2011 at 2:21am by Alison*

**Chemistry**

Look up the density of water at 20C and the density of water at 25C. They are not the same. Knowing that mass = volume x density, then density = mass/volume. The volume you calculate for the flask will be different and that will cause the density of your determination to be ...
*Tuesday, September 27, 2011 at 3:51pm by DrBob222*

**chemistry**

actually, the specific gravity is the ratio of the density of oil to the density of water. Since the density of water is 1g/ml, the density of a substance is numerically the same as the specific gravity. However, specific gravity is a dimensionless number, while density has ...
*Tuesday, February 19, 2013 at 2:34pm by Steve*

**physics**

Height will be proportional to g, and pressure, and inversely to density. Height=k g * P/density At Earth 2185mm=k g 101.3kPa/density at X 725mm=k *g/4 * PressureX/density Divide the top equation into the bottom.. 725/2185=1/4 * PressureX that gives you pressurex Now for ...
*Tuesday, November 13, 2007 at 7:57pm by bobpursley*

**Chemistry**

PV=nRT n/V= mole density=P/RT mass/Volume=density=molmass*P/RT density= 28*Pressure/RT convert C to K
*Thursday, March 25, 2010 at 10:17am by bobpursley*

**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...
*Tuesday, August 30, 2011 at 3:35pm by ALISON*

**Chemistry**

No, you want to use the density. mass = volume x density. You know the mass of water, you can look up the density at 22 degrees C, which leaves you with volume to calculate. Post your work if you get stuck.
*Friday, September 26, 2008 at 8:02pm by DrBob222*

**Chemistry**

same mass, so new density= old density/2.7 what is old density? You know pressure,volume, temp, find moles PV=nRT convert moles to grams.
*Saturday, October 24, 2009 at 11:06pm by bobpursley*

**Chemistry**

mass = volume x density. Substitute for mass and density; solve for volume. Make sure the units of density (you don't list that) agrees with the unit you want in the answer.
*Sunday, September 23, 2012 at 12:37pm by DrBob222*

**Chemistry**

Are these 10 coins of the same type? density = g/mL = 55g/1 mL = ? but this is not the reported density of Ag; therefore, the coins must not be the same. Is this a made up problem? The density of the heaviest metal in the periodic table is no more than about 20 g/mL or so. The...
*Saturday, June 29, 2013 at 6:52pm by DrBob222*

**chemistry**

It isn't possible to calculate the theoretical molarity of vinegar without know the density. I tried looking up the density of vinegar on the net and found values all the way from 0.96 g/mL to 1.08 g/mL (and some said 5% by mass and other 5% by volume). 5% by mass vinegar ...
*Sunday, June 6, 2010 at 3:42pm by DrBob222*

**chemistry**

The thing you said about the volume of the container didn't make sense. So far, I only have the the density for H2O and Hg. So I couldn't put that the volume of the container was 454/13.6. Density over density?
*Wednesday, April 7, 2010 at 8:06pm by Amy*

**Chemistry**

sp.g. = density alcohol/density H2O with both at the same temperature. If density of water is 1.0 g/mL, then sp.g. alcohol is 0.79 (with no units).
*Tuesday, September 4, 2012 at 1:33am by DrBob222*

**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...
*Thursday, December 28, 2006 at 8:12pm by Alexandria*

**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*

**physics**

a) How far does it have to fall? Assume one meter. Don't forget there is a buoyancy effect. Net downward force is [1.05*density)*V - (density)*V]*g = M*a = (1.05)*density*a "density" is ambient density a = (0.05/1.05) g = 0.47 m/s^2 (1/2) a t^2 = 1 m when t^2 = (1 m)*(4.25 s^2...
*Sunday, May 8, 2011 at 11:28pm by drwls*

**Chemistry**

1. density of air @ 20C = ? mass air = volume x density 2. density ice = ? mass ice = volume ice x density ice. Substitute and solve for volume. If density ice is given in g/cc, remember to convert kg to grams. The answer will be in cc, convert to L. 3. volume bar = length x ...
*Thursday, February 27, 2014 at 6:34pm by DrBob222*

**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 ...
*Friday, March 26, 2010 at 7:41pm by Anonymous*

**Science-Chemistry**

The idea in the first question is to reason through it. What do we know about mass, volume, density? Since mass = volume x density, then volume = mass/density; therefore, the highest density will be the smallest volume and the lowest density will have the largest volume. right...
*Tuesday, April 27, 2010 at 11:59pm by DrBob222*

**Chemistry**

Convert 0.78 inches to ?cm. Then volume of the cube = (?cm)^3. density = mass/volume. You have mass and volume, solve for density. Then mass = volume x density. volume 25.0 cc. density from above.
*Tuesday, September 18, 2012 at 5:48pm by DrBob222*

**Chemistry**

mass/volume=density volume=mass/density. but specific gravity and density are the same when compared to water, so volume=7.75kg/(1kg/liter)=7.75 liters.
*Monday, September 20, 2010 at 9:45pm by bobpursley*

**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.
*Thursday, October 9, 2008 at 4:29pm 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.
*Thursday, October 9, 2008 at 4:37pm by Carly*

**physics**

An object will float if its' density is less than the density of the fluid it is placed in. Density = 5.4g / 2.7cm^3 = 2g/cm^3. Density of water = 0.99g/cm^3. The object will not float , because its' density is greater than the density of water.
*Tuesday, May 17, 2011 at 1:47pm by Henry*

**chemistry**

because the mass and volume lowered. It was not squished to make density increase. Density= m/v
*Monday, December 3, 2007 at 7:31pm by Anonymous*

**chemistry**

volume = mass/density I assume that the units of the density of acetone are g cm^-3.
*Friday, January 21, 2011 at 2:39am by Dr Russ*

**Crime scene chemistry**

Is that density? If so, then you would expect the density of the plastic to decrease.
*Wednesday, March 28, 2012 at 7:50pm by DrBob222*

**chemistry**

volume= mass/density You need units on your density term...
*Tuesday, September 18, 2007 at 4:32pm by bobpursley*

**chemistry**

change specific gravity to density. Volume=mass/density
*Sunday, May 11, 2008 at 10:12pm by bobpursley*

**chemistry**

you use the density formula density=mass/volume and solve
*Monday, August 29, 2011 at 10:37pm by Aidan*

**Chemistry**

Mass = volume x density. The density of mercury is 13.6 g/mL.
*Tuesday, September 21, 2010 at 7:06pm by DrBob222*

**Chemistry**

If the density of a substance is 15.2 g/mL, what is the density in cg/kl?
*Saturday, December 31, 2011 at 3:25pm by Ben*

**Chemistry**

But that one was density of solution, but this problem is density of water so is that different???
*Friday, February 15, 2013 at 6:44pm by K*

**Chemistry**

Ice density: 0.9167 g/cm3 at 0 °C Aluminum density: 2.7 g/mL
*Thursday, February 27, 2014 at 6:12pm by Kelsi*

**chemistry**

Figure the density first: 25.68g/1cm^3 then mass=density(volume)
*Saturday, April 10, 2010 at 3:12am by bobpursley*

**Chemistry II**

correction to the formula of density. density is equal to the ratio mass and volume, that is d=m/v m=d*v
*Sunday, September 27, 2009 at 10:49pm by MarJaldrin*

**Chemistry II**

correction to the formula of density. density is equal to the ratio mass and volume, that is d=m/v m=d*v
*Sunday, September 27, 2009 at 10:49pm by MarJaldrin*

**Chemistry**

It could a number of things only known to your teacher and/or the author of the printed instructions for the lab. It sounds like an experiment to determine the density of a material. When you measure the mass and the volume of an object, you have the data needed to calculate ...
*Wednesday, September 2, 2009 at 4:51pm by GK*

**chemistry**

Answers for copper has a density of 8.92g/cm3 and nickel has a density of 8.90 . which one is denser
*Thursday, November 4, 2010 at 5:17pm by Anonymous*

**college chemistry**

I bet if it didn't have the density, it had the specific gravity. You can use that to determine the density.
*Tuesday, March 19, 2013 at 9:33pm by Devron*

**Chemistry**

P*molar mass = density*RT Solve for density.
*Wednesday, October 27, 2010 at 10:12pm by DrBob222*

**chemistry**

mass = volume x density Substitute and solve for density
*Wednesday, October 12, 2011 at 1:42am by DrBob222*

**Chemistry**

mass = volume x density. Substitute and solve for density.
*Wednesday, December 7, 2011 at 11:29am by DrBob222*

**Chemistry**

Is that a DENSITY of 1.5 g/cc. Use mass = volume x density
*Wednesday, February 15, 2012 at 1:12pm by DrBob222*

**chemistry**

mass = volume x density. Substitute and solve for density.
*Monday, December 10, 2012 at 10:01am by DrBob222*

**Chemistry**

Yes, the density of Pb is much greater than the density of feathers.
*Thursday, August 29, 2013 at 10:54pm by DrBob222*

**chemistry**

What's the density. mass = volume x density. Substitute and calculate.
*Friday, September 13, 2013 at 7:14pm by DrBob222*

**chemistry - density and error (check)**

The units are a little strange, I would expect kg m^-3 or g cm^-3. The density of the earth is ca 5.5 g cm^-3 or 5.5 x10^3 kg m^-3. The error in the density will depend on how you calculated it.
*Monday, January 24, 2011 at 7:43am by Dr Russ*

**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
*Monday, January 24, 2011 at 7:43am by Farah*

**chemistry**

Didn't I do this for you last night? P*molar mass = density*RT Substitute for Ar and conditions and solve for density. Then use the same formula and the density you calculated for Ar, substitute and solve for P for Ne.
*Monday, November 5, 2012 at 11:34pm by DrBob222*

**chemistry**

Surely you mean Al has a density of 2.7 g/cc. mass = volume x density. You have mass and density, substitute and solve for volume. That's the amount that the water level will rise when the chunk of Al is placed in the graduated cylinder.
*Thursday, June 7, 2012 at 6:42pm by DrBob222*

**chemistry conversion**

sorry, just realized i left the density out. The density is 1.049 g/mL. This should help. Thanks.
*Thursday, January 31, 2008 at 5:45pm by stew*

**ChEMISTRY (Help please)**

What are the units for density? While you're at it check that problem again. I can't believe the density is that high in g/mL.
*Tuesday, April 13, 2010 at 8:02pm by DrBob222*

**chemistry**

I use a modified form of the gas equation. P*molar mass = density(in g/L)*R*T Substitute and solve for density.
*Tuesday, November 16, 2010 at 11:09pm by DrBob222*

**chemistry**

mass = volume x density Substitute and solve for the one unknown. The density of water is 1.00 g/mL
*Tuesday, January 31, 2012 at 11:51am by DrBob222*

**Chemistry**

Density = Mass / Volume Multiplying both sides by bolume, Volume x Density = Mass Dividing both sides by density, Volume = Mass / Density V = 24 g / 12 g/mL = ____?
*Sunday, February 15, 2009 at 6:33pm by GK*

**oops--Chemistry**

I made typos galore here. The density is g/mL = density = mass/volume = 745.2g/690 mL = 1.08 g/mL and not the numbers I showed. The density of 1.08 g/mL; however, is correct. The rest of the problem looks ok to me.
*Wednesday, September 11, 2013 at 8:59pm by DrBob222*

**Chemistry**

The gas law equation of PV = nRT can be re-written as P*molar mass = density*R*T Substitute and solve for density.
*Tuesday, November 9, 2010 at 5:06pm by DrBob222*

**Chemistry**

The density of H2O is about 1.00 g/mL. Many organic solvents have a density less than that; hence they float.
*Wednesday, November 16, 2011 at 11:14am by DrBob222*

**AP Chemistry**

You can add the PV = nRT equation to the density and come up with P*molar mass = density*RT
*Sunday, February 16, 2014 at 6:54pm by DrBob222*

**Chemistry**

Compare the density of this car with the density of gold.
*Thursday, September 20, 2007 at 9:06pm by bobpursley*

**CHEMISTRY**

You don't have the density, do you? The density given is that of a liquid.
*Sunday, January 20, 2008 at 6:06pm by DrBob222*

**Chemistry**

neither. mass = volume x density or volume = mass/density. density = specific gravity here.
*Monday, September 20, 2010 at 11:21pm by DrBob222*

**Chemistry Concept**

As you point out, the question is silly. The density of rust is less than the density of iron, so for the same mass, rust has more volume. example: The density of sulfur is 2.07g/cm^3. The density of sulfur dioxide is .0014 g/cm^3. what happened to the volume as sulfur burned...
*Saturday, January 24, 2009 at 3:59am by bobpursley*

**chemistry**

Density = Mass / Volume ...(1) mass = 84.7 g volume = 49.6 cm³ Density = ? g/cm³ Part 2: From (1), we have volume = mass / density Use mass = 7.75g and density calculated above.
*Wednesday, September 22, 2010 at 6:02pm by MathMate*

**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.??
*Monday, September 6, 2010 at 6:19pm by Jack*

**General Chemistry (Chem101)**

density of mixture is .4137*2.0514 + .5863*2.6678 = 2.413g/mL so, the density of the object is the same
*Thursday, September 20, 2012 at 12:22pm by Steve*

**chemistry**

The general gas formula can be modified from PV = nRT to P*molar mass = density*RT Substitute and solve for density.
*Sunday, April 13, 2014 at 11:42pm by DrBob222*

**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 ...
*Friday, April 2, 2010 at 8:09am by Anonymous*

**Chemistry**

for #1, we have to find the density first right? so density is mass/volume, so from there you take 381.676 and divide that by.. and thats where im lost :(
*Wednesday, April 6, 2011 at 11:46pm by Shannon*

**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!
*Monday, June 13, 2011 at 4:16pm by Grace*

**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?
*Wednesday, February 1, 2012 at 2:25pm 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?
*Tuesday, September 3, 2013 at 2:30pm 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?
*Tuesday, September 3, 2013 at 2:45pm by Elizabeth*

**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 ...
*Sunday, September 10, 2006 at 5:57pm by delonte*

**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?
*Sunday, June 28, 2009 at 8:59pm by Bobby*

**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.) ...
*Wednesday, September 13, 2006 at 6:25pm by Jamie*

**Chemistry**

What's the density? mass = volume x density.
*Thursday, September 20, 2012 at 10:38pm by DrBob222*

**Chemistry**

I apologize. Specific gravity has no units; I inadvertently read it as density. My error. Since no temperature is specified, we must assume specific gravity to be the same as density; therefore, density = 1.1088 g/mL. 1.0 kg ethylene glycol = 1,000 grams. mass = volume x ...
*Monday, September 13, 2010 at 10:17pm by DrBob222*

**Physics**

All you need to answer that is the amount submerged in water, and the density of water. According to Archimedes Principle: (Water density) * 0.68 V = (wood density)* V Cancel out the V and use the density of water 1.00 g/cm^3 * 0.68 = wood density
*Tuesday, November 17, 2009 at 12:44am by drwls*

**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 ...
*Sunday, October 8, 2006 at 1:27pm by airkon*

**chemistry**

I don't know how you obtained 6.8 g. The part about the density: The problem asks for VOLUME of ethanol to add to make ?? soln of ??M. mass = volume x density You calculate mass from above, substitute density here of 0.789, and solve for volume (in mL). Then convert to L. Look...
*Friday, February 12, 2010 at 8:22pm by DrBob222*

**science**

Find the Density, which is equal to mass/volume, and use the equation density of the block/ density of water. If the density of the block is lower than water, then it will float, if not then it will sink or be submerged. To calculate the density of the block take the weight ...
*Thursday, January 17, 2013 at 9:15pm by Devron*

**science**

Personally, I don't think using density as a guide for buying cereal is worth the time it takes to estimate the density. Cereal is sold by the weight, not density. It may be true that cereal with a high density makes one feel full where a lower density cereal doesn't. Perhaps ...
*Saturday, January 9, 2010 at 1:11pm by DrBob222*

**Chemistry**

density is mass/volume. So, twice the mass, twice the density. twice the volume, half the density. So, for cylinder 2, we have (1/1.35) / (1/.792) * 2.70 = 1.584
*Sunday, September 1, 2013 at 11:19am by Steve*

**Chemistry**

2NaN3 ==> 2Na + 3N2 Use the density of nitrogen to convert 70 L(needed to fill the air bag) to grams. mass = volume x density
*Saturday, January 9, 2010 at 10:55pm by DrBob222*

**Chemistry**

#1 - no way to know, without some information about the pressure. #2,3 just remember that mass = density * volume Look up the density of ice and aluminum, and you're almost done.
*Thursday, February 27, 2014 at 6:12pm by Steve*

**Chemistry **

2.70 g/mL is the correct value for density. The specific gravity is NOT 0.135 for two reasons: 1. specific gravity is the same as density if the water had a density of 1.00 g/mL. 2. specific gravity has no units.
*Saturday, September 18, 2010 at 8:25pm by DrBob222*

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