Chemistry Spring Final Review

Which conversion factor would you use to find the number of grams in 2.5 moles of O₂?

• 1 mole / 16 grams

• 16 grams / 1 mole

• 1 mole / 32 grams

• 32 grams / 1 mole

Which statement is true of any chemical reaction?

• The mass of the reactants is always greater than the mass of the products.

• The mass of the products is always greater than the mass of the reactants.

• There is no relationship between the mass of the reactants and products.

• The mass of the reactants equals the mass of the products.

When the equation: Fe₂O₃ + H₂ → Fe + H₂O is balanced, what is the coefficient of H₂?

• 6

• 3

• 2

• 1

When the reactant sodium carbonate (Na₂CO₃) is heated; sodium oxide (NaO) and carbon dioxide (CO₂) are produced. What type of reaction is occurring?

• Single Replacement

• Double Replacement

• Decomposition

• Synthesis

A double-replacement reaction takes place when aqueous KI reacts with aqueous PbCl₂. You would expect one of the products of this reaction to be:

• KI

• KPb

• PbI₂

• ICl₂

The reaction type for the following equation is... Mg + 2HCl → H₂ + MgCl₂

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Which of the following reactions is a synthesis reaction?

• NaCl + KI → NaI + KCl

• CH₄ + 2O₂ → CO₂ + 2H₂O

• 2 H₂ + O₂ → 2 H₂O

• 2 NH₃ → N₂ + 3 H₂

In a balanced chemical reaction, what must be the same on both sides?

• The number of atoms of each element

• The sum of the subscripts

• The coefficients of the reactants and the products

• The volume of the gases

When the following equation is balanced and reduced, the coefficients are: AlCl3 + Na2S → Al2S3 + NaCl

When the equation below is balanced, what is the coefficient for Fe? Fe + O2 → Fe2O3

• 1

• 2

• 3

• 4