Significant Digits in Chemistry

I can apply the rules of significant digits to report measurements and calculations accurately.

3:39

We don't generate video — this one is by Professor Dave Explains on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

1. 1

   When using measuring devices, you should only estimate one digit further than the level of precision inherent in the instrument.

2. 2

   Leading zeros are not significant, but zeros in between non-zero digits are significant.

3. 3

   When multiplying or dividing, your answer should have as many sig figs as the value with the least number of sig figs.

“A chemist measures a volume of liquid as 125.0 mL. Later, they add the liquid to another volume of 25 mL. What is the total volume, reported with the correct number of significant figures?”

Sample answer included in the free materials