A0.200-g sample of unknown metal (X) is dropped into hydrochloric acid and releases 80.3 mL of hydrogen gas at STP. Using the Ideal Gas Law, the number of moles of the unknown ? is yielding a molar mass of?
Referring to the Periodic
Table, the name of the unknown metal is ?
and symbol ?

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.