CCA 7C/7D Review

The Law of Conservation of Mass states that:

• The mass of the reactants must equal the mass of the products

• The mass of the reactants must be greater than the mass of the products

• The mass of the reactants must be less than the mass of the products

• The mass of the reactants are unrelated to the mass of the products

New substances formed during a chemical reaction are shown​​​

• On the left side of the equation and are called products

• On the right side of the equation and are called reactants

• On the left side of the equation and are called reactant

• On the right side of the equation and are called products

The yield (→) symbol always points to the:

• Reactants

• Products

• Sale items

• Which way to go

The following equation represents the reaction that took place. Which of the following would be the reactants in the above experiment?

• Hydrogen only

• Oxygen only

• Water and oxygen

• Hydrogen and oxygen

The reaction shown in the image below shows a reaction.

• Balanced

• Unbalanced

• Separated

• Pretty blue reaction

To satisfy the Law of the Conservation of Mass, the mass of the reactant should be:

• 12 g

• 22 g

• 50 g

• 6 g

Balance the following equation:

• CF4 + CBr4 + F₂ Br₂ ->

• A reaction that absorbs heat and feels cold is called a reaction.

• A reaction that gives off heat and feels warm is called a/an reaction.

• During a lab we mixed phenyl red and calcium bicarbonate on one side of the bag and the mixture became warm. What kind of reaction took place?

A reaction that absorbs heat and feels cold is called a reaction.

• Combustion

• Exothermic

• Single Replacement

• Endothermic

A reaction that gives off heat and feels warm is called a/an reaction.

• Decomposition

• Exothermic

• Single replacement

• Endothermic

During a lab phenyl red and calcium bicarbonate on one side of the bag and the mixture became warm. What kind of reaction took place?

• Synthesis

• Exothermic

• Endothermic

• Reduction