What is the formula to compute density of a substance?
494602
density of substance is equal to the ratio of mass of the substance to the volume of the substance.\n \ndensity=mass/volume
1150459
Density is mass per volume... so divide the 2 kg by 240 cm3 and you will get your answer.
1126461
This is how you do it.\nYou need to find out the mass of hexane first. Calculate the mass of hexane by subtracting the mass of empty beaker from the mass of beaker with hexane. Once you obtain the mass of hexane, divide it by the volume which is 5ml. You will get your density in units g/ml. I hope this was enough help. E-mail if you need more than this.
149911
Density = Mass / Volume\nIf you know any 2 of the above quantities, you can find the other.
945388
density,volume,weight,number of electron and proton.
110989
Density of hexane - .6548 g/l\nDensity of methanol - .791 g/l\n\nMethanol has a higher density.\n\nUse chemfinder.com to find info on chemicals.
879131
To determine density you also have to know the temperature.  The colder a substance gets, the more dense it becomes (ie. the particles come closer together).  Water is the one odd ball, it becomes most dense at 4 degree C instead of below freezing like most substances.
359119
look at column 7.  all of the densities appear there in grams/cm3.\n\nhttp://www.science.co.il/PTelements.asp
120873
D= M/V\n\nIts a formula used to calulated to density (thinkness) of an object by dividing the Mass of an object by its volume. In this case, you can use the water displacement method that displaces (water) from its orignal volume by adding an object (marble). Using a balancer, measure and record the weight of graduated cylinder(ml), before and after the addition of water. Subtract the weight of the cylinder with water from the cyliner's weight and you will get the mass. You have to pay attention to how much the water displacement after adding the marble. record the volumes before and after (if ness). This will solve for volume. Once this is accomplished, you would have no problem finding the density.
344825
density is mass divided by volume - so if you know the volume and the density, then you multiply them to get the mass  (which is synonomous with weight)
124349
The mass of any substance depends on how much you have of it, it is not a fixed amount.\nYou may be thinking of density perhaps?  The density of a substance is equal to its mass divided by its volume (D=m/v), density is the same for a given substance no matter how much you have.\nIf by chance you are talking about density, probably the most important liquid to know would be water with a density of 1 g/mL at room temperature.
282227
http://www.answers.com/topic/density?method=22\nhttp://www.reference.com/search?q=density
865332
density =mass over volume ( i hate chem)
852232
Pv = nRT\nn = m/M (M Molecular weight)\nPV = (m/M)RT\nP = (m/V)RT/M\nPM/RT = m/v = Density.\nPlug the numbers, watch the units and get the density.\n\nOh a numerical answer, yes, ...42.
42411
Density = Mass / Volume\n\nDensity of a substance is a measure of how much mass is present in a given unit of volume.
67284
well the formula is the square root of 3kT/m  where k is the boltzman constant(1.38066 x 10^-23 J/K) T is in Kelvin so you would have to convert(just add 273 to the temp in Celcius) so your T is 290K and m is the mass. the mass can be found using the density of water(1000 kg/m3) the formula for density is d=m/V and V can be found by using the volume of a sphere, 4/3(pi)r^3 oh, and don't forget to convert the nanometers into meters, then cut the diameter in half for radius.\nusing this information to get you started, you should be able to do it yourself. so you should try it first before reading further :) im sure you were familiar with all of those formulas, you just need to remember to think of things all at once so you can put them together.\n\nok, so we start with the rms velocity formula. first problem is that we need mass. ok, lets solve for mass using density. oh right, we need volume, ok, lets solve for volume then:\nwe need to make the diameter into meters, so thats 1.0 x 10^-8 meters. now we cut this in half to get the radius(r) so that's 5.0 x 10^-9.\nV=(4/3)(pi)r^3\nV=(4/3)(3.14159)(5 x 10^-9)^3\nV=5.236 x 10^-25 m^3\nnow we have volume, so using the density of water(1000 kg/m3), we can solve for mass:\nd=m/V\n1000=m/(5.236 x 10^-25)\nm=5.236 x 10^-22 kg\nok, now we have mass, so we can use our original rms velocity formula and solve for velocity. *sigh* finally.\n\nv(rms)= sqrt[3kT/m]\nv(rms)= sqrt[3(1.38066 x 10^-23)(290)/(5.236 x 10^-22)]\nv(rms)= 22.94 m/s\n\ni would check my math if i were you though, i tend to make stupid calculator errors. the concepts are there though :p
1102336
Density is the mass per unit volume of a substance while specific gravity is an index that describes the ratio  of the substance density to the density of water.