The connecticut bueller theory assumes that particles of an ideal gas are

are in random, constant, straight-line motion

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all I Ask is for a thank u peac

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.