Stoichiometry Quiz

What is stoichiometry primarily concerned with?

• The numerical relationships in chemical reactions

• The study of chemical bonds

• The history of chemistry

• The physical properties of elements

In the grilled cheese analogy, what does the ratio of cheese slices to sandwiches represent?

• The taste of the sandwich

• The nutritional value

• A conversion factor

• The cooking time

What is the purpose of a balanced chemical equation in stoichiometry?

• To calculate the speed of a reaction

• To provide a recipe for numerical conversions

• To determine the color of the reactants

• To measure the temperature of a reaction

How many moles of water are produced from 2.72 moles of propane in excess oxygen?

• 5.44 moles

• 10.9 moles

• 8.16 moles

• 12.5 moles

What is the coefficient of oxygen in the balanced equation for the combustion of propane?

• 3

• 4

• 5

• 6

In a mole-to-mole conversion, what is the first step?

• Measure the temperature

• Use the coefficients from the balanced equation

• Convert grams to liters

• Calculate the pressure

What additional step is required in mass-to-mass conversions compared to mole-to-mole conversions?

• Measuring the density

• Determining the color change

• Using molar mass to convert grams to moles

• Calculating the volume

How many grams of carbon dioxide are produced from 77.9 grams of propane?

• 233 grams

• 180 grams

• 150 grams

• 200 grams

What is the molar mass of propane used in the mass-to-mass conversion example?

• 44.1 grams

• 50.0 grams

• 48.0 grams

• 40.0 grams

What is the final step in a mass-to-mass conversion?

• Measure the temperature

• Convert moles back to grams using molar mass

• Determine the volume

• Calculate the pressure