Boyd takes additional measurements of the mass of product formed in a reaction. He uses a balance that has smaller graduations than the first balance he used. What is Boyd most likely trying to change?

A balance with smaller graduations can distinguish smaller changes in mass, so repeated measurements can be more precise. Precision means how closely measurements agree with one another; accuracy means how close a measurement is to the true value. Using finer graduations alone does not necessarily make the measurements closer to the true value, so Boyd is most likely trying to increase precision but not accuracy.

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