Chemical Equations and Molar Mass Quiz

What is the process of balancing a chemical equation?

• Changing the order of the reactants and products

• Adding or removing atoms

• Adjusting the coefficients of the reactants and products

• Multiplying the reactants and products by a constant

Why is it important to balance chemical equations?

• To make the equation look more balanced.

• To waste time and effort.

• To ensure the law of conservation of mass is obeyed.

• To confuse the reader.

What are the different types of chemical equations?

• Combination, Decomposition, Displacement, Double displacement, Redox

• Addition, Subtraction, Multiplication, Division, Substitution

• Ionic, Covalent, Metallic, Polar, Nonpolar

• Synthesis, Dissociation, Replacement, Single replacement, Oxidation-reduction

How can you classify a chemical equation as a synthesis reaction?

• By the breakdown of a substance into two or more simpler substances.

• By the exchange of ions between two substances.

• By the separation of a substance into two or more simpler substances.

• By the combination of two or more substances to form a single, more complex substance.

What is the molar mass of water (H2O)?

• 22

• 20

• 18

• 16

Calculate the molar mass of carbon dioxide (CO2).

• 44.01 g/mol

• 55.01 g/mol

• 33.01 g/mol

• 22.01 g/mol

What is the molar mass of methane (CH4)?

• 16.05

• 18.02

• 12.01

• 14.03

How do you calculate the molar mass of a compound?

• Multiply the atomic mass of each element in the compound by the number of atoms and sum them up.

• Divide the atomic mass of each element in the compound by the number of atoms and sum them up.

• Calculate the molecular weight of each element in the compound and sum them up.

• Calculate the atomic mass of each element in the compound and sum them up.

Balance the chemical equation: H2 + O2 → H2O.

• H2 + O2 → H2O + O

• H2 + O2 → HO2

• H2 + O2 → H2O2

• 2H2 + O2 → 2H2O

Classify the chemical equation: 2H2O → 2H2 + O2.

• Neutralization reaction

• Decomposition reaction

• Synthesis reaction

• Combustion reaction