Which statement is true according to the kinetic theory?
a. molecules of different gases with the same mass and temperature always have the same average density
b. molecules of different gases with the same mass and temperature always have the same average volume
c. molecules of different gases with the same mass and temperature always have the same pressure.
d. molecules of different gases with the same mass and temperature always have the same molecular mass
e. molecules of different gases with the same mass and temperature always have the same average kinetic energy

Molecules of different gases with the same mass and temperature always have the same average kinetic energy - E.

Molecules of different gases with the same mass and temperature always have the same average kinetic energy.

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in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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