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1. New moon, waxing gibbous, Full moon, and waning crescent are the main ones but there are more.
2. The revolution of the Earth is 365.25 days while the revolution of the moon is 28 days. Also, the Earth orbits the sun while the moon orbits the Earth and vaguely orbits the sun due to the orbit of the Earth.
3. Tidal waves, seasons, and the lunar cycle.
4. Moonlight is light that is reflected off the moon's surface that comes from the sun. This "lights" the moon up. Sunlight is light that comes from the sun which is made by a bunch of chemical reactions.
Good luck!
Answer:
Because their Molar masses or their densities are almost the same.
Explanation:
Average molecular mass of the air is 28.97 g/mol.
Molar mass of nitrogen gas (N2) ≈ 2*14.01 = 28.02 g/mol
As we can see that these molar masses is to close.
To collect gas over the air, the gas should be very light, that means that its molar mass should be much less than molar mass of the air.