Chemical Reactions 6.2

Which is the correct principle that can be applied to ALL chemical reactions?

• conservation of mass
• coefficient principle
• energy loss theory
• reactants are formed from products

The minimum amount of energy needed to initiate a chemical reaction is called-

• product threshold
• activation energy
• principle mass
• absorbent energy

What are the functions of enzymes?

• lower activation energy needed
• raise the amount of energy needed to start a reaction
• increase the product output
• help break and form chemical bonds

Which of these equations is correct? 

• H₃ + O₂ --->   H₂O
• C + H₄ ---> CH₄
• C₂ + H₆ + O₆ ---> C₆H₁₂O₆
• Na₂ + Cl ---> NaCl

Which statement is correct?

• Reactants are to the right of the arrow and products to the left
• reactants are to the left of the arrow and products right
• Arrow points towards the reactants
• depends on the chemical equation

Exothermic reactions...

• Absorb energy
• Release energy
• Release Color
• Absorb Color

Heating up two reactants will make the reaction...

• stay the same
• go slower
• become constant
• go faster

___________________ are the elements are compounds that leave (are formed in) a chemical
reaction.

• Polymers
• Bonds
• Reactants
• Products

What is a chemical formula?

• A mathematical equation based on atomic numbers
• A equation used to find an element's valence
• Uses chemical symbols to represent the atoms of elements and their ratios in a chem. compound

What kind of reaction is shown in the picture

• Endothermic
• Exothermic
• Explosive
• Boring