Stoichiometry

The calculation of quantities in chemical equations is called

• accuracy and precision

• dimensional analysis

• percent composition

• percent yield

• stoichiometry

• 1,3,2,3

• 2,12,4,6

• 4,6,2,3

• 1,6,2,3

• 2,3,1,1

• 4,6,6,2

• 2,3,2,3

• 2,3,3,2

• 1,3,3,1

• 2,3,1,2

• only mass

• only mass and moles

• only mass, moles, and molecules

• only mass, moles, molecules, and volume

• atoms and mass

In every chemical reaction,

• mass and molecules are conserved

• moles and liters are conserved

• mass and atoms are conserved

• mass and liters are conserved

• mass and liters are conserved

• 9 moles of reactants regroup to form 11 moles of product

• 9 grams of reactants regroup to form 11 grams of product

• 9 liters of reactants regroup to form 11 liters of product

• 9 atoms of reactants regroup to form 11 atoms of product

• 22.4 liters of reactants regroup to form 22.4 liters of product

Which of these is an INCORRECT interpretation of this balanced equation?

2S (s) + 3O₂ (g) → 2SO₃ (g)

• 2 atoms S + 3 molecules O₂ → 2 molecules SO₃

• 2 g S + 3 g O₂ → 2g SO₃

• 2 mol S + 3 mol O₂ → 2 mol SO₃

• 2 L S + 3 L O₂ → 2 L SO₃

The combustion of propane (C₃H₈) produces CO₂ and H₂O:

C₃H₈ (g) + 5O₂ (g) → 3CO₂ (g) + 4H₂O

The reaction of 10 mol of O₂ will produce ______ mol of H₂O.

The combustion of propane (C₃H₈) produces CO₂ and H₂O:

C₃H₈ (g) + 5O₂ (g) → 3CO₂ (g) + 4H₂O

When 2.5 moles of O₂ are consumed in their reaction, ____ moles of CO₂ are produced.

• 0.3

• 1.5

• 0.2

• 0.4

• 3.6