Q: Dentists occasionally use metallic mixtures called amalgams for what?


Read this paragraph and choose the correct option from the provided answers:

Dentists occasionally use metallic mixtures called amalgams for fillings. If an amalgam contains zinc, however, water can contaminate the amalgam as it is being manipulated, producing hydrogen gas under basic conditions. As the filling hardens, the gas can be released, causing pain and cracking the tooth. Write a balanced chemical equation for this reaction.

 Choices:

- tools

- anesthesia

- braces

- fillings


A:
fillings