The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3

Who is the guy who invented chemistry?

• Dimitri Mendeleev

• Aintoine Lavoisier

• Amedeo Avogadro

The Law of Conservation used to be called  __________ Law.

• Avogadro's 

• Lavoisier's

What element is a vital ingredient for combustion?

• Hydrogen

• Oxygen

• Hydro-generater 

A burning fuse is put on a scale.  Seemingly it loses mass.  If all the particles of a burning fuse were collected inside of a closed system, what will happen to its mass?

• Mass will stay the same.

• Mass will decrease.

• Mass will increase.

Joseph Proust built on Lavoisier's careful measurements showing a chemical compound always contains the same proportions of its elements.  This is called __________.

• The Law of Definite Proportions

• The Law of Conservation

Avogadro determined any gas put in a container of the same size (amount) having the same temperature and pressure would have the same number of atoms or molecules. He figured out how to weigh (mass) molecules as long as they were gaseous.

• True

• False