Question

which of these is a safe lab practice? picking up a hot beaker with your hands. pouring all the leftover chemicals and products down the drain. labeling all chemicals immediately. going to talk to your friend across the room while the bunsen burner is on.

Explanation:

Picking up a hot beaker with hands can cause burns. Pouring leftover chemicals down the drain can pollute water and damage pipes. Leaving a Bunsen burner unattended is a fire - hazard. Labeling chemicals immediately helps in identification and safety, preventing mix - ups and accidents.

Answer:

Labeling all chemicals immediately.