Unit 5 Practice Test

What is the 'mole ratio' in stoichiometry derived from?

• The periodic table

• The coefficients of a balanced chemical equation

• The temperature of the reaction

• The volume of the reactants

What must be done before performing stoichiometric calculations?

• Heat the reactants

• Identify the given

• Remove all water

• Determine color changes

Which of the following is NOT a type of stoichiometry problem again?

• Mole-to-mole

• Mole-to-mass

• Mass-to-mass

• Color-to-smell

What unit is typically used in 'mass to mole' conversions again?

• Liters

• Grams

• Atoms

• Kilometers

The term mole ratio refers to:

• The weight of one mole of a substance

• The relationship between mass and volume

• The ratio between coefficients in a balanced equation

• The ratio between pressure and volume

In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 4 moles of hydrogen?

• 2 moles

• 4 moles

• 1 mole

• 8 moles

If 2 moles of Na react with Cl₂, how many moles of NaCl are produced again? (2Na + Cl₂ → 2NaCl)

• 1 mole

• 2 moles

• 3 moles

• 0.5 mole

In a stoichiometric calculation, which island would 'grams' fall under?

• Mole island

• Volume island

• Mass island

• Representative particle island

Tags

NGSS.HS-PS1-7

Which of the following is equivalent to one mole again?

• 6.02 × 10²³ particles

• 1 gram of a substance

• 1000 liters of gas

• One molecule of oxygen

In the reaction 2Al + 3Cl₂ → 2AlCl₃, what is the mole ratio of Cl₂ to AlCl₃?

• A. 2:3

• B. 3:2

• C. 1:1

• D. 2:2

Tags

NGSS.HS-PS1-7