6.2 Chemical Reactions and Enzymes Quiziz

What principle holds true for all chemical reactions?

• conservation of matter
• reactants are formed from products
• energy loss theory
• coefficient prinicple

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

• activation energy

• threshold energy

• absorbent energy

• enzyme threshold

Enzymes can-

• help make more products total

• save energy by lowering activation energy

• prevent excess reactions from occuring

• help balance the limiting reactants

Which statement is true

• reactants are on the righ side of the arrow

• products are on the left side of the arrow

• products combine to form reactants

• reactants combine to form products

Which of the following models best demonstrates a balanced chemical equation? (The different colors of dots represent different atoms).

• F

• G

• H

• J

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C₆H₁₂O₆

• The structural arrangement of the atoms in a glucose molecule
• The color of a glucose molecule
• The size of a glucose molecule
• The number of atoms of each element in a glucose molecule

Tags

NGSS.MS-PS1-1

For an investigation a student poured a blue solution of CuSO₄ into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes.

The student inferred that a chemical reaction occurred. What evidence supports this?

• A dark solid formed on the zinc metal.

• The zinc metal remained silver-colored and shiny

• The CuSO₄ solution turned blue when the zinc metal was added.

• None of these

The reactants are on the left side of the chemical equation.

• True

• False

In a ___________change, a substance changes into a different substance.

• Physical

• Chemical

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same

• that matter can only be changed into new substances by introducing a catalyst

• that matter exists in the same state throughout any chemical change

• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5