No, methane is a very light gas and crude oil is certainly not
Yes
Crude Oil is less dense than water.
water weighs more than Crude Oil
Crude oil is a mixture of lots of different organic chemicals, there is alkanes (methane, ethane, propane ... octane ... C18H38) and alkalies, alcohols and lots of different hydrocarbons.
Natural GasCoalOilMethane Clathrates (methane/water ices)
petroleom, gas like methane, vegetable oil ,crude oil ,alcohal,wool,cottn,egg,proyeins,etc.
Butane is a hydrocarbon compound found in natural gas and crude oil. Both natural gas and crude oil are fossil fuels. At sufficient pressure and low temperature, it can be a liquid. So in answer to your question, butane is compound that comes from a fossil fuel, and can be both a liquid and a gas depending on the pressure and temperature. Natural gas is mostly methane and ethane, with small amounts of butane and propane, so it is usually stored as a gas phase. Crude oil has many hydrocarbon compounds heavier than butane, so it remains a liquid. See related link.
You probably mean the "specific gravity" of crude oil. The answer is yes. For example: crude oil with a specific gravity of less than 1.0 and is therefore lighter than water and will float on its surface. "Extra heavy crude oil" has a specific gravity greater than 1.0 and sinks to the bottom of water.
No, oil is lighter than antifreeze.
methane is the first (and most simple) of the homologous series known as alkanes. It can be formed many ways of which some are --> i) catalytic cracking --> in this process large alkanes are broken down into smaller simpler alkanes and alkenes (of which methane is one) ii) biogas/manure --> in the process of fermentation or anaerobic digestion of manure, about 50% to 75% of the gas released is Methane gas iii) fractional distillation of crude oil/petroleum --> methane is obtained in the top fraction in the fractional distillation of crude oil or petroleum.
Crude oil is just plain old oil no not the oil you put in your car that has many more things in it than just oil
Crude oil comes from the reservoir as live crude, containing methane and other lower carbon compounds that are liberated as the pressure is reduced (in the reservoir, in the well, in the separator or storage battery) and the crude is allowed to cool. Dead crude is degassed crude meaning no more gas is likely to be liberated. The volumetric measurement of crude is normally done at "standard conditions" of atmospheric pressure and 60 degrees F, although standards vary.