a sample of crude oil is boiled for several minutes. What change takes place in its density?
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Using a hypothetical crude oil at a hypothetical boiling point, yes it is likely to increase in density. For example, pentane boils at 36.1 C and has a density of 0.629. Hexadecane boils at 288 C and has a density of 0.775. \n\nHowever, consider that crude oil is a mixture of organic compounds and varies greatly depending on the source. In a few uncommon cases, crude oil is solid at room temperature (I actually have a collection of crude oil) and contains so many longer alkanes that it may not change density on boiling. To answer your question hypothetically, yes it will increase the density, but it might not always, depending on the content of the crude.
43471
As oil temperature rises its viscosity decreases (much faster than its density) and this is what causes an increased flow rate.
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If the water is full of air bubbles, its density is reduced. You loose buoyancy and sink.\n\nWhen there is a natural gas blow out under floating oil platforms, they have been known to go down almost instantly.
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CL #F  \n\nSweet crude oil is traded on the commodities market.
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floating shows that an object is less dense than water.  Think cooking oil spilled into a kitchen sink.  Does it float on top, or does it sink?\n\nLet d=density:\nd(water)=1.00\nd(oil) < 1.00, therefore it will float\n\nBut also, a chunk of iron (I believe) has a density of around 5.00 (of some unit, it's been two years since I've dealt with density questions on a regular basis.  Someone want to patch my answer for me?).  Since it is greater than that of water, it will drop like a rock to the bottom.\n\nd(lead,iron, etc.) > 1.00, therefore it will sink.
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Natural Petrol has a density of 711.22 kg/m3 at 60ºF\n\nVehicle Petro, has a density of 737.22 kg/m3 at 60ºF
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Properties of Fluids \nThe properties outlines below are general properties of fluids which are of interest in engineering. The symbol usually used to represent the property is specified together with some typical values in SI units for common fluids. Values under specific conditions (temperature, pressure etc.) can be readily found in many reference books. The dimensions of each unit is also give in the MLT system (see later in the section on dimensional analysis for more details about dimensions.) \n\nDensity \nThe density of a substance is the quantity of matter contained in a unit volume of the substance. It can be expressed in three different ways. \n\nMass Density \nMass Density, , is defined as the mass of substance per unit volume. \n\nUnits: Kilograms per cubic metre, (or ) \n\nDimensions:  \n\nTypical values: \n\nWater = 1000, Mercury = 13546 Air = 1.23, Paraffin Oil = 800. \n\n(at pressure =1.013and Temperature = 288.15 K.) \n\nSpecific Weight \nSpecific Weight , (sometimes , and sometimes known as specific gravity) is defined as the weight per unit volume. \n\nor \n\nThe force exerted by gravity, g, upon a unit volume of the substance. \n\n\nThe Relationship between g and  can be determined by Newton's 2nd Law, since \n\n\nweight per unit volume = mass per unit volume g\n\n\nUnits: Newton's per cubic metre, (or ) \n\nDimensions:. \n\nTypical values: \n\nWater =9814 , Mercury = 132943 , Air =12.07 , Paraffin Oil =7851  \n\n\nRelative Density \nRelative Density, , is defined as the ratio of mass density of a substance to some standard mass density. \n\nFor solids and liquids this standard mass density is the maximum mass density for water (which occurs at c) at atmospheric pressure. \n\n\n\nUnits: None, since a ratio is a pure number. \n\nDimensions: 1. \n\nTypical values: Water = 1, Mercury = 13.5, Paraffin Oil =0.8. \n\n\nViscosity \nViscosity, m, is the property of a fluid, due to cohesion and interaction between molecules, which offers resistance to sheer deformation. Different fluids deform at different rates under the same shear stress. Fluid with a high viscosity such as syrup, deforms more slowly than fluid with a low viscosity such as water. \n\nAll fluids are viscous, "Newtonian Fluids" obey the linear relationship \n\ngiven by Newton's law of viscosity. , which we saw earlier. \n\nwhere  is the shear stress, \n\nUnits ;  \n\nDimensions. \n\nis the velocity gradient or rate of shear strain, and has \n\nUnits: , \n\nDimensions  \n\n is the "coefficient of dynamic viscosity" - see below. \n\n\nCoefficient of Dynamic Viscosity \nThe Coefficient of Dynamic Viscosity, , is defined as the shear force, per unit area, (or shear stress ), required to drag one layer of fluid with unit velocity past another layer a unit distance away. \n\n \n\nUnits: Newton seconds per square metre, or Kilograms per meter per second,. \n\n(Although note that  is often expressed in Poise, P, where 10 P = 1 .) \n\nTypical values: \n\nWater =1.14  , Air =1.78  , Mercury =1.552 , \nParaffin Oil =1.9 . \n\n\nKinematic Viscosity \nKinematic Viscosity, , is defined as the ratio of dynamic viscosity to mass density. \n\n\n\nUnits: square metres per second,  \n\n(Although note that n is often expressed in Stokes, St, where St = 1 .) \n\nDimensions: . \n\nTypical values: \n\nWater =1.14  , Air =1.46  , Mercury =1.145  , \nParaffin Oil =2.375  .
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Density is a factor that cannot be changed except by physical changes such as phase changes. 1 Liter of water at 5°C will have the same density as 1 Liter of water at 90°C, and because density is g/cm^3, the density of 1, 10, or 100 milliliters(a unit of liquid volume) of water is the same, because water weighs 1 gram per millilter, so 1/1=1density),\n10g/10ml=1, and 100g/100ml=1
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Density = mass / volume\nTo find the volume of an irregular object submerge it in water the amount the water rises is the volume of the object.
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the density of ethanol in liquid state is: 0.789 g/cm3\nim ta winnar! lol
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density of Palm Oil = .925 g/ml\n\n1 kg Palm Oil * (1000 g Palm Oil/ 1 kg Palm Oil) * ( 1 ml / .925 g Palm Oil) * ( 1 L/ 1000 ml) = 1.08 L Palm Oil\n\nanswer = 1.08  L Palm Oil\n\n3 significant figures
280201
Density = mass/volume
647523
density = mass/volume.\n it changes wt respect to temp.\n as temp increases,volume increases and so density decreases. however there may b some exceptions.\n  as an example, if v heat water to high temp but less than it's boiling point, it's volume increases.\n  so, v can say that the density is less than the previous condition.
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Pore some vegetable oil into a glass of water.  Shake it up then let it sit for a minute.  The oil will separate out of the water and you will see two layers.  The oil is a lipid because it isn't polar and can't dissolve in the water.
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fat content\n\n\nthe fattier it is, the more it'll float
963983
There are many ways to do this problem.  The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy.  You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy.  The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".  \n\ngood luck!
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Oil is less dense than water.