Week 1 Reading Quiz- Stoichiometry

Which of the following is the correct definition of mole ratio?

• A conversion factor that relates the amounts of moles of any two substances involved in a chemical reaction

• A conversion factor that converts from grams of a substance to the number of atoms of that substance in a chemical reaction

• A conversion factor that converts from grams of a substance to the number of particles of that substance in a chemical reaction

• A conversion factor that converts from grams of a substance to the number of molecules of that substance in a chemical reaction

What did Daniel Rutherford find out in 1772?

• Discovered that combustion existed

• Found out that if a mouse was kept under a closed container, it would die due to the lack of air particles

• Discovered oxygen

• Proved that "air" was not an element

Define reaction stoichiometry.

• Involves the mass relationships between reactants and products in a chemical reaction

• The actual procedure of the lab that is followed in the laboratory setting

• The process of converting grams into atoms of the same substance

• The process of converting atoms into grams of the same substance.

What is molar mass?

• Is the mass in grams of one mole of a substance

• Is the mass in pounds of one mole of a substance

• Is the mass in grams of one atom of a substance

• Is the mass in grams of one gram of a substance

Before working on a reaction stoichiometry calculation, first, you must have...

• a balanced chemical equation

• the number of grams for each substance present

• the number of moles for each substance present

• a unbalanced chemical equation