How does chemistry relate to wearing a mask? How is the Coronavirus pandemic and its prevention related to chemistry?

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

How many neutrons does an element have if its atomic number is 50 and its mass number is 166