11. The ratio of the rates of diffusion of a given element to that of helium is 4. What will be the molecular weight of the element? a. 0.25 b. 4 d. 7 C. 2

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.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )