Basics of Chemistry

This type of system allows matter to flow freely in and out...

• Closed System
• Open System

A boiling pot with a lid on it to keep in the energy is what type of system?

• Closed System
• Open System

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

_________ are the substances that are produced by rearranging atoms in a chemical reaction.

• Reactants

• Producer

• Reaction

• Products

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

The law of conservation of mass states that ________

• the total mass of reactants is more than the total mass of products

• the mass of a chemical reaction remains constant

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge

The number to the lower side of an element is a 

• Subscript
• Superscript
• Coefficient
• Charge

Which of the following are subscripts in this Chemical Formula: 3Fe₂O₄

• 3,4

• 3,2

• 2,4

• 6