It must be made of matter because anything and everything is made up of atoms. The other three options are made of atoms but they are also matter.
so one liter is about 2. something gallons so at 12.8 km/l you would get about 30 mpg which is insane but yeah
The velocity of the gas is inversely proportional to the square root of the molar mass of the gass. Heavier molecules tend to travel slow compared to light molecules. Among these, He has the lowest molar mass of 4 g/mol hence this element has the greatest velocity among all molecules given.
Answer:
Atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. A chemical bond is a force of attraction between atoms or ions
Explanation:
