The density of water is greater than the density of ethanol. This is partly a result of how tightly packed the molecules of the substance are.
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No. Oil is less dense than water, so 1 liter of oil will weigh less than 1 liter of water.
The 1000 grammes of ethanol will occupy a greater volume because its specific gravity is lower than that of water. s.g. water = ~1.0 s.g. ethanol = ~ 0.794
Five gallons of paint is heavier than five gallons of water, which is heavier than five gallons of oil, so please be more specific.
A liter is a unit of volume not weight, therefore to determine how much a liter weighs it depends on what you're measuring. A liter of water has a different weight than a liter of sand and so on.
It is easiest to observe the volumes of the two and go from there. One liter of water is most easily observed by most students as exactly half of a two liter of soda. Water and soda have a similar density (mass divided by volume) so they will have a similar mass. Then compare the volume of 1 liter to the volume of a dinosaur. I believe even most baby dinosaurs were larger than a liter. Take into account that most land animals alive will have a density not too far from water (some people float and some sink). The animals that have a density that differs greatly from water will more often than not have a higher density than water and sink. So, because a dinosaur is SIGNIFICANTLY more voluminous than a liter, and we can speculate that they were at least the density of water if not more, its very safe to say that dinosaurs had many times the mass of 1 liter of water.