Problem: A sample that has a mass of about 25 g is weighed on a balance that has a precision of 0.1 g. How many significant figures should be reported for this measurement?

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We have to describe how many significant figures should be reported for a mass of 25 g when it is weighed on a balance with a precision of 0.1 g.


Any measurement made by an instrument cannot be more precise than the maximum precision of the instrument.

Take example of a scale, that reads in cm units and the number of lines from 1 cm to 2 cm is 10. This means the precision of the scale is 0.1 cm so we cannot measure 0.23 cm using scale.

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Problem Details

A sample that has a mass of about 25 g is weighed on a balance that has a precision of 0.1 g. How many significant figures should be reported for this measurement?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Significant Figures concept. You can view video lessons to learn Significant Figures. Or if you need more Significant Figures practice, you can also practice Significant Figures practice problems.

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Based on our data, we think this problem is relevant for Professor Hands' class at The Community College of Baltimore County.