`if you had one test tube containing aqueous agno3 and another one containing nh4cl, and you poured them together into a beaker, what would be the formula of the precipitate that forms?

AgCl

Explanation:

The reaction is AgNO3 (aq) + NH4Cl >AgCl(s) + NH4NO3.

Silver chloride is an insoluble salt that will precipitate out of the reaction mixture. It can then the filtered off, washed and dried.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.