A student conducted an experiment on the chemical reaction rates of burning coal. She broke a coal sample of 95.1 g into large lumps and another coal sample of 95.1 g into small lumps. She continually measured the weight of the coal lumps for 400 seconds while they burned. Which statement correctly explains why the small lump coal burned faster?

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

idk what is it? is this a question that you know the answer or u dont