22 Adv Chem Unit 7 Review

Which of these is NOT an indicator of a chemical reaction?

• precipitate formation

• heat released

• sound produced

• change in total mass of substances

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.

• Matter can only be lost in a chemical reaction.

• Matter can be gained and lost in a chemical reaction.

• Matter can only be gained in a chemical reaction.

What does the symbol (s) mean?

• solution

• soluble

• solid

• saturated

What is the formula for phosphorus in its natural state (when it is by itself)?

• P

• P₂

• P₄

• P₈

What numbers are used to balance chemical reactions?

• Subscripts

• Coefficients

• Both

• Neither

A precipitate is formed when:

• 2 clear solutions are mixed

• 2 clear solutions are heated

• 2 clear solutions are cooled

• A mixed solution is separated

Combustion of a hydrocarbon will yield

• O₂

• CO₂

• H₂O

• H₂

According to the activity series, the reaction between AgCl and I₂:

• will occur

• will not occur

According to the activity series, the reaction between Al and gaseous water:

• will occur

• will not occur

Which of the following is a combustion reaction?

• 2Ca + O₂ --> 2CaO

• 6H₂O + 6CO₂ --> C₆H₁₂O₆ + 6O₂

• 2NaI + F₂ --> 2NaF + I₂

• MgO + H₂O --> Mg(OH)₂