which best explains why sawdust burns more quickly than a block of wood of equal mass under the same…

which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions?\nthe molecules move more quickly in the sawdust than in the block of wood.\nthe pressure of oxygen is greater on the sawdust.\nmore molecules in the sawdust can collide with oxygen molecules.\noxygen is more concentrated near the sawdust than the block of wood.

which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions?\nthe molecules move more quickly in the sawdust than in the block of wood.\nthe pressure of oxygen is greater on the sawdust.\nmore molecules in the sawdust can collide with oxygen molecules.\noxygen is more concentrated near the sawdust than the block of wood.

Answer

Brief Explanations:

Combustion is a reaction between a fuel and oxygen. Sawdust has a larger surface - area - to - volume ratio compared to a block of wood. This means more of the sawdust's molecules are exposed and can collide with oxygen molecules, increasing the reaction rate.

Answer:

More molecules in the sawdust can collide with oxygen molecules.