Answer:
Earth's gravity is strong enough to hold onto its atmosphere and keep it from drifting into space.
Continental air masses are characterized by dry air near the surface while maritime air masses are moist .Polar air masses are characterized by cold air near the surface while tropical air masses are warm or hot. Arctic air masses are extremely cold.
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Electrons determine the chemical properties. Protons and neutrons are in the nucleus the number of protons determines the number of electrons of an atom
0.250 L*3M=0.250 L*3mol/L= 0.750 mol
