Question

what are the best practices while sharing a lab balance with other students? select one or more: leave a note when you have tared a balance for your glassware. brush off any chemical dust around the balance after each use. alert your ta or instructor about any issues with the balance. place samples directly onto the balance.

Explanation:

• For "Leave a note when you have tared a balance for your glassware": Taring the balance for glassware affects its reading, so leaving a note helps others know the setup, which is a good practice.
• For "Brush off any chemical dust around the balance after each use": Chemical dust can contaminate future samples or damage the balance, so cleaning it is a best practice.
• For "Alert your TA or instructor about any issues with the balance": Reporting issues ensures the balance is maintained and safe for use, which is a good practice.
• For "Place samples directly onto the balance": This is incorrect as samples (especially chemicals) can contaminate the balance or cause inaccurate readings; we should use weighing paper or containers.

Answer:

A. Leave a note when you have tared a balance for your glassware, B. Brush off any chemical dust around the balance after each use, C. Alert your TA or instructor about any issues with the balance