Identify the activity that belongs in the field of chemistry.
a. developing medicines
b. analysis of a compound
c. production of a new plastic
d. all of the above

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse