DrB's PS.8.1.5 Practice Review

2 or more substances react causing the atoms to rearrange into a new substance or “product.”

• chemical reaction
• physical change
• chemical formula
• chemical mixture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these chemical equations is balanced?

• Mg + HCl → H₂ + MgCl₂
• KClO₃ → KCl + O₂
• H₂O + CO₂ → H₂CO₃
• H₂ + O₂ → H₂O

Tags

NGSS.MS-PS1-5

The Law of Conservation of Mass states that

• matter cannot be created or destroyed
• matter cannot be created but can be destroyed.
• matter can be created or destroyed
• matter can be created but cannot be destroyed

Tags

NGSS.MS-PS1-5

Substances that are being reacted or changed in a chemical reaction are called...

• reactants
• products
• chemical formulas
• coefficients

The arrow in a chemical equation is called a...

• yield
• product
• equal
• plus

The small number after the element showing how many of each atom of an element is in a molecule is called a/an

• subscript
• reactant
• coefficient
• product

The coefficient is the large number in a chemical equation that represents the total number of

• specific type of molecule
• reactants
• a specific type of atom in a molecule
• products

Substances that are formed from a chemical reaction are called...

• chemical formula
• coefficient
• reactants
• products

Tags

NGSS.MS-PS1-5

A chemical equation is shown below. glucose + oxygen gas ⟶ carbon dioxide + water What are the products of the reaction?

• carbon dioxide + water
• glucose + carbon dioxide
• water + oxygen gas
• oxygen gas + glucose

In a chemical reaction, the total mass of the product must be equal to

• the total mass of the reactants
• twice the mass of the reactants
• one-half the mass of the reactants
• the mass of the reactants subtracted from one another

Tags

NGSS.MS-PS1-5