To dazzle his students, Mr. Turner collected volumes of ammonia gas and carbon dioxide gas. As the two colorless gases were combined in a closed two-liter bottle with a small amount of ammonium hydroxide, the chemistry students watched in amazement at the growth of white crystals inside the bottle. What happened inside the bottle as the gases were mixed? A) a physical change B) a chemical change C) the solution process D) a mixture was formed

B) a chemical change .

Explanation:

There will be no chemical reaction when the gases ammonia and carbon dioxide are mixed together . But when there is presence of ammonium hydroxide , chemical reaction takes place between carbon dioxide and ammonium hydroxide resulting into the formation of ammonium carbonate  as follows

2NH₄OH + CO₂ =( NH₄)₂CO₃  + H₂O.

The growth of white crystals inside the bottle indicates the presence of ammonium carbonate .

So it is a chemical change .

not too sure thinking it will always be directed towards the centre of the earth. could be wrong not sure

a electromagnetic waves