Astudent took a calibrated 200.0 gram mass, weighed it on a laboratory balance, and found it read 186.5 g. what was the student’s percent error?

6.75%

Explanation:

%error = | actual − experimental | / actual × 100%

The actual mass is 200.0 grams.

The measured mass is 186.5 grams.

So the percent error is:

%error = | 200.0 − 186.5 | / 200.0 × 100%

%error = 6.75%

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