More Significant Figures in Mixed Operations

More practice with determining significant figures in mixed operations! We will work through 5 problems, starting easy and moving to more difficult problems. We will spend time determining significant figures when adding or subtracting numbers written in scientific notation.
Let me know what other topics you would like videos about and if you have any questions about determining significant figures.
If you need a review on counting significant figures, check out this video below!
• Identifying Significan...

[@desrepeerc206]

This was amazing, great choice of practice problems. They look intimidating at the start, but by the end of the video, I learned a lot! Thank you.

[@meperson]

Very clear explanation and a great video - thank you! One suggestion for another video is to do sig-fig calculation where operations are square/root etc (more advanced). Example of such usage would be calculating diagonal from x/y distances with certain accuracy.

[@uzairhussain4856]

Respected ma'am, Thank you so much from pakistan. Your both videos on dealing with significant arithmetic in mixed operations helped me alot. I just wanted to know, how can we predict the uncertainty in value from no of sigfigs? Also, how should i report measured values so that others can predict the uncertainty from sigfigs in reported value. Have a good time. Lots of love from pakistan.

[@ChemHelpASAP]

Welcome from Pakistan! It's awesome to hear from that part of the world! Significant figures really tie into lab work. In lab you want to be aware of how many significant figures you can report in the measurements you make. Different types of glassware and equipment (like balances) will have a specific error associated with them. For example, most graduated cylinders are only accurate to one decimal place and have an error of ± 0.1 mL. This means you can only report a volume to one decimal place (like 5.2 mL). A volumetric flask will be accurate to two decimal places and will usually have an error of ±0.01 mL. So you would report a volume to two decimal places (like 15.00 mL). This is a true handling of significant figures. In analytical chemistry, we actually take the errors and propagate them through the math. I have a live stream on propagation of error if you are interested! kzbin.info/www/bejne/jKPVi3h5gs2ee5I