Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

If the reaction you are considering is:

Mg + 1/2O2 → MgO

The mass of Magnesium metal is the mass from the weighing balance measured at the start of the experiment

Theoretical yield of MgO can be determined based on the reaction stoichiometry. i.e. 1 mole of Mg yields 1 mole of MgO. therefore, from the known moles of Mg (= mass of mg/atomic mass of Mg) the # moles of MgO produced can be calculated.

% yield = (experimental/theoretical)*100

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

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.