Pure elemental gases like oxygen and nitrogen have extremely low melting values of about -220 degrees Celsius because pure gases are nonpolar and only covalently linked. The intensity of intermolecular interactions between molecules determines a substance's melting point.
Which gases make up the elements?
The pure gases element group, includes hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), and noble gases At normal pressure and temperature, the following gases are present: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) (STP).
Which four types of gases are important?
A four-gas monitor, which measures the four principal gases oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), and methane (CH4), can safeguard the employees in any setting (CH4).
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