Combustion Analysis Quiz

What is the primary goal of combustion analysis?

• To find the density of a compound

• To determine the empirical formula of a compound

• To calculate the speed of a chemical reaction

• To measure the temperature of a reaction

Which elements are always present in a compound undergoing combustion analysis?

• Oxygen and Nitrogen

• Carbon and Hydrogen

• Hydrogen and Oxygen

• Carbon and Nitrogen

What are the products of a combustion reaction?

• CO and H2

• H2 and O2

• O2 and N2

• CO2 and H2O

Why is it important to convert the masses of CO2 and H2O into moles?

• To determine the volume of the products

• To find the empirical formula of the original compound

• To measure the pressure of the reaction

• To calculate the energy released in the reaction

What is the molar mass of CO2 used in the calculations?

• 18.02 g/mol

• 28.02 g/mol

• 44.01 g/mol

• 32.00 g/mol

How do you determine the greatest common factor when finding the empirical formula?

• By subtracting the smallest value

• By adding the values together

• By dividing by the smallest value

• By multiplying the largest value

What is the empirical formula derived from the combustion analysis in the video?

• C5H12

• C3H8

• C2H6

• C4H10

What is the criterion for considering a number close enough to a whole number?

• Within ±0.1 of the whole number

• Within ±0.2 of the whole number

• Within ±0.5 of the whole number

• Within ±1.0 of the whole number

Which of the following could be a possible molecular formula based on the empirical formula C5H12?

• C5H10

• C4H8

• C10H24

• C6H14

What is the significance of the empirical formula in chemistry?

• It provides the structural formula of a compound

• It indicates the molecular weight of a compound

• It represents the simplest ratio of elements in a compound

• It shows the exact number of atoms in a molecule