Equation Practice

The Law of Conservation of Mass states:

• Mass is always changing.

• Matter cannot be created or destroy.

• Matter can always be created or destroyed.

• Change is impossible.

The two sides of a chemical equation are called?

• Reactants (left) and Products (right)

• Ingredients (left) and Product (right)

• Cations and Anions

• Reactants (left) and Results (right)

Tags

NGSS.MS-PS1-5

A chemical reaction that involves breaking one compound into multiple pieces is called:

• Synthesis

• Decomposition

• A catalyst

• A breaker

A chemical reaction that takes multiple molecules and combines them to form a single compound is known as:

• Synthesis

• Decomposition

• Legothesis

• A Construct

Is this equation balanced?

• yes
• no
• Not enough information
• Left side is balanced

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

The blue numbers in the image below represent ________

• Charges
• coefficients
• subscripts
• none of the answers are correct

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Decomposition occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.

A synthesis occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.