Chemical reactions and balancing

The reaction of aluminum with dilute H²So⁴

Can be classified as

• Synthesis

• Decomposition

• Single displacement

• Double displacement

What a metal atom to replace another kind of metallic ions in a solution, the metal atom must be

• Good oxidizing agent

• Higher in the activity series the metal in solution

• Lower in the electro motive chart than the metal in solution

• Equal in the activity to the metal in solution

An endothermic reaction

• Has a ΔH value that’s negative and would feel cold if it occurred in your hand

• Has a ΔH value that’s positive and would feel cold if it occurred in your hand

• Has a ΔH value that’s negative and would feel warm if it occurred in your hand

• Has a value that’s positive and would feel warm if it occurred in your hand

During a phase change the temperature of the substance

• Increases

• Decreases

• Stays the same

• Goes down then up

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not changed

• The total mass of the reactants is greater than the mass of the product

• Mass is neither created or destroyed

• The total mass of the product is greater than the total mass of the reactants

What are the coefficients used to balance the equation below?

__Ag²O—>__Ag+__O²

• 2,1,2

• 2,4,1

• 2,2,2

• 1,1,1

Balance this equation:

MgCl² —> Mg⁴+Cl²

• 4,1,5

• 4,1,4

• It’s already balanced

Which is generalized equation represents a decomposition reaction

• AB—> A+B

• A+B—>AB

• A+BC—> AC+B

• AB+CD—>AD+CB

During an exothermic reaction, what happens to the energy in relation to the surroundings?

• Released to

• ‏ Absorb from

• Mixed with

Having to do with heat

• Decomposition

• Synthesis

• Displacement

• Thermic