Compound formula: c₆h₁₂o₆ what is the gram formula weight

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel