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At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids?

aThe particles in the liquid have greater kinetic energy than the particles in the gas.
bThe particles in both substances are able to flow because of weak intermolecular forces.
cThe particles in both substances are able to fill any container because both have indefinite shape and indefinite volume
dWater molecules have a lower boiling temperature than oxygen molecules, so at room temperature they exist as a liquid rather than a gas.

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