1.4 - Composition of Mixtures(AP)

What needs to be adjusted to balance a chemical equation?

• Subscripts

• Coefficients

• Chemical identities

• Atomic numbers

What is a common misconception about the mole ratio of H₂ to O₂?

• There are 2 grams of H₂ for every gram of O₂

• The coefficients are the same as the mass ratio

• The mole ratio is 2:1

• The mole ratio is 1:1

What is the molar mass of 1 mole of O₂?

• 16 grams

• 32 grams

• 8 grams

• 64 grams

What are the two elements present in the mixture?

• Aluminum and Hydrogen

• Aluminum and Oxygen

• Oxygen and Nitrogen

• Hydrogen and Nitrogen

What does the document say about the oxygen in the mixture?

• It is only in Al

• It is only in Al2O3

• It is in both Al and Al2O3

• It is not present

What is the first step in converting mass of oxygen in a mixture to moles of Al₂O₃?

• Convert mass of O₂ to moles of O₂

• Convert moles of Al₂O₃ to mass of Al₂O₃

• Convert mass of Al₂O₃ to moles of O₂

• Convert moles of O₂ to mass of O₂

What is the intermediate step mentioned in the conversion process?

• Mass of Al₂O₃

• Moles of O₂

• Mass of O₂

• Moles of Al₂O₃

What is the molar mass of Al₂O₃ used in the calculation?

• 101.9 grams/mole

• 50.9 grams/mole

• 203.8 grams/mole

• 75.5 grams/mole

How many grams of Al₂O₃ are produced from 0.01229 moles of Al₂O₃?

• 1.25 grams

• 2.50 grams

• 0.75 grams

• 1.00 grams

What is the molar ratio of carbon to phosphorus in the compound?

• 4:1

• 6:1

• 3:2

• 1:1