Physical Science Spring Final Question Pool

Which of the following is a statement of the law of conservation of mass?

• Mass is created but not destroyed.
• Mass is destroyed but not created.
• Mass is neither created nor destroyed.
• Mass is both created and destroyed, depending on the chemical reaction.

Tags

NGSS.MS-PS1-5

In what type of reaction does one reactant form two or or more products?

• Synthesis
• Decomposition
• Single replacement
• Double replacement

What particle is transferred from one atom to another in a redox reaction?

• Electron
• Neutron
• Proton
• Nucleus

Tags

NGSS.HS-PS1-2

How are reactions related to chemical bonds?

• Bonds in the reactants are broken, and bonds in the products are formed.
• Bonds in the products are broken, and bonds in the reactants are formed.
• Bonds in both the reactants and products are broken.
• Bonds are formed in both the reactants and the products.

Tags

NGSS.MS-PS1-5

What type of reaction always releases energy?

• Endothermic
• Exothermic
• Decomposition
• Oxidation-reduction

Tags

NGSS.HS-PS1-4

In general, an increase in temperature

• increases reaction rate.
• decreases reaction rate.
• does not affect reaction rate.
• acts as a catalyst.

Tags

NGSS.HS-PS1-5

How do I calculate the molar mass of an element?

• Google
• By copying the atomic weight/mass of the element from the periodic table
• By copying the atomic number of the element
• By copying the number of neutrons that element has

How do I calculate the molar mass of a molecule/compound?

• Google
• By copying the atomic weight/mass of the compound from the periodic table
• By multiplying the atomic weight of each element in the molecule/compound by its subscript in the chemical formula, then adding all the products together.
• By adding together the atomic numbers of each element in the molecule/compound

What law are we trying to follow when we balance chemical equations?

• Law of conservation of energy
• Law of conservation of momentum
• Law of conservation of mass
• Law of gravity
• Law of balanced chemical equations

Tags

NGSS.MS-PS1-5

What is the molar mass of elemental fluorine?

• 9 grams per mole
• 18.998 grams per mole
• 2.111 grams per mole
• 170.982 grams per mole