It's due to the chemical reaction of the co2 on the ocean water, since there is no salt the density increases
2
Venus has a thick atmosphere. Mercury does not have an atmosphere.
Venus because it's similar to earth by size, mass, and density. but Venus has no oceans or any living life on it.
Venus, Earth and Mars.
There are four inner planets, which starting with the closest to the sun are Mercury, Venus, Earth, and Mars. Of these, Venus and Earth have thick atmospheres, whereas Mercury and Mars don't.
There are two such planets, Mars and Venus. Venus has a much thicker atmosphere than Mars, but both atmospheres are about 95% carbon dioxide.
Venus, Earth, Mars, and Triton (Neptune's largest moon) have carbon dioxide in their atmospheres.
All the planets in our Solar System have atmospheres, except for Mercury, which only has minute traces of gases.
About 9.3 Megapascals
venus
Mars and Venus are both planets that have atmospheres composed mostly of carbon dioxide.
Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune