All liquids have viscosity. The viscosity of crude oil is higher than water due to molecular adhesion forces which are forces that attract the various hydrocarbon compounds to each other. Crude oil has a very large range of viscosities. See related link.
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Motor oil is not soluble in water, as it is a nonpolar substance. Its solubility will depend on the specific type of motor oil and the solvent used. However, motor oil can be soluble in certain organic solvents.
Yes, hexane is generally soluble in motor oil. Hexane is a non-polar solvent while motor oil is a complex mixture of hydrocarbons, so they are likely to mix together.
No, iodine is not soluble in oil. Iodine is a water-soluble compound and will not mix with nonpolar substances like oil.
Yes, it is easily soluble in oil.
Calcium chloride is not soluble in oil. It is a water-soluble compound that dissolves readily in water but does not mix with oil.
yes
Advil (ibuprofen) is a non-polar compound and is more soluble in oil than in water. It has limited solubility in water but is more soluble in organic solvents like oil.
No, soap is not soluble in oil. Soap is hydrophilic, meaning it is soluble in water, but not in oils or other nonpolar substances.
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I think oil will be less soluble in water at elevated temperatures.
Yes, Copper Sulfate is soluble in coconut oil.