A cubic meter of air near saturation may contain 28 grams, or about 1. 6 moles of water molecules at 30 °C, but only 8 grams, or about 0. 44 mole of water molecules per cubic meter of air at 8 °C

Letter a, because when there are unlike charges they will always attract to each other.

It maybe because uranus is made of gas but uranus has a solid core in the middle

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.