Chem 2 Review

Front

What are the reactants in the equation 3Ag₂S + 2Al → 6Ag + Al₂S₃?

Back

3Ag₂S + 2Al

Front

What does the coefficient in a chemical equation represent?

Back

The number of molecules or moles of a substance involved in the reaction.

Front

What does the formula C₆H₁₂O₆ indicate about sugar?

Back

It has 6 carbon, 12 hydrogen, and 6 oxygen atoms.

Front

Classify the change when chocolate syrup is dissolved in milk: A for physical, B for chemical.

Back

A

Front

What is a true statement about physical and chemical changes?

Back

A change in temperature often occurs during a chemical change.

Front

Define a chemical change.

Back

A process where substances combine or break apart to form new substances.

Front

Define a physical change.

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of units of that substance.

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that start a chemical reaction, while products are substances formed as a result of the reaction.

Front

What does it mean if a substance changes state (solid, liquid, gas)?

Back

It is typically a physical change, not a chemical change.