Mole Video and Quiz

What does Avogadro's number represent?

• The number of particles in a gram of a substance

• The volume of a mole of a substance

• The number of particles in a mole of a substance

• The weight of a mole of a substance

Who was the first to theorize that atoms of different elements had distinct relative weights?

• Jean Perrin

• Amedeo Avogadro

• John Dalton

• Albert Einstein

What did Avogadro theorize about gases in 1811?

• Gases weigh the same under equal conditions

• Gases react in whole number ratios by volume

• Gases have the same number of molecules under equal conditions

• Gases can be converted into liquids at a specific temperature

Who reintroduced Avogadro's ideas to the scientific community?

• Dimitri Mendeleev

• Stanislao Cannizzaro

• Jean Perrin

• Albert Einstein

What was the significance of Jean Perrin's experiments in 1909?

• They disproved the existence of atoms

• They confirmed the structure of the periodic table

• They discovered the neutron

• They validated the existence of atoms