QUANTITATIVE CHEMISTRY EXAMINATION QUESTIONS
AND CORRECT ANSWER WITH EXPLANATION GRADED
A+ STUDY GUIDE SOUTHERN NEW HAMPSHIRE
UNIVERSITY
1. Quantitative chemistry deals with:
A. Measurement of amounts of substances
B. Color changes only
C. Shape of molecules only
D. Weather changes
Answer: A
Rationale: It focuses on numerical chemical calculations.
2. Mole is a unit of:
A. Amount of substance
B. Temperature
C. Pressure
D. Volume
Answer: A
Rationale: SI unit for substance amount.
3. Avogadro’s number is:
A. 6.022 × 10²³
B. 3.14
C. 9.81
D. 1.66 × 10⁻²⁷
Answer: A
Rationale: Particles per mole.
4. Molar mass is:
A. Mass of one mole of substance
B. Mass of one atom
C. Volume of gas
D. Density of liquid
Answer: A
Rationale: g/mol measurement.
,5. Relative atomic mass is based on:
A. Carbon-12 scale
B. Oxygen scale
C. Hydrogen scale
D. Nitrogen scale
Answer: A
Rationale: Standard reference isotope.
6. Empirical formula shows:
A. Simplest whole number ratio
B. Actual number of atoms
C. Molecular structure
D. Shape only
Answer: A
Rationale: Simplest composition ratio.
7. Molecular formula shows:
A. Actual number of atoms
B. Simplest ratio only
C. Shape only
D. Color only
Answer: A
Rationale: True molecular composition.
8. Percentage composition refers to:
A. Elemental mass percentage
B. Volume only
C. Pressure only
D. Temperature
Answer: A
Rationale: Mass contribution of elements.
9. Stoichiometry is:
A. Calculation of reactants and products
B. Study of colors
C. Study of gases only
D. Study of liquids only
Answer: A
Rationale: Quantitative reaction relationships.
, 10. Balanced equation ensures:
A. Conservation of atoms
B. Change in mass
C. Loss of energy
D. Color change
Answer: A
Rationale: Atom conservation principle.
11. Limiting reactant is:
A. Reactant that is used up first
B. Excess reactant
C. Catalyst
D. Product
Answer: A
Rationale: Limits product formation.
12. Excess reactant is:
A. Remains after reaction
B. Always used up
C. Product only
D. Catalyst only
Answer: A
Rationale: Not fully consumed.
13. Theoretical yield is:
A. Maximum possible product
B. Actual product
C. Random amount
D. Loss amount
Answer: A
Rationale: Calculated maximum.
14. Actual yield is:
A. Experimentally obtained product
B. Calculated value
C. Constant value
D. Zero value
Answer: A
Rationale: Real experimental result.
AND CORRECT ANSWER WITH EXPLANATION GRADED
A+ STUDY GUIDE SOUTHERN NEW HAMPSHIRE
UNIVERSITY
1. Quantitative chemistry deals with:
A. Measurement of amounts of substances
B. Color changes only
C. Shape of molecules only
D. Weather changes
Answer: A
Rationale: It focuses on numerical chemical calculations.
2. Mole is a unit of:
A. Amount of substance
B. Temperature
C. Pressure
D. Volume
Answer: A
Rationale: SI unit for substance amount.
3. Avogadro’s number is:
A. 6.022 × 10²³
B. 3.14
C. 9.81
D. 1.66 × 10⁻²⁷
Answer: A
Rationale: Particles per mole.
4. Molar mass is:
A. Mass of one mole of substance
B. Mass of one atom
C. Volume of gas
D. Density of liquid
Answer: A
Rationale: g/mol measurement.
,5. Relative atomic mass is based on:
A. Carbon-12 scale
B. Oxygen scale
C. Hydrogen scale
D. Nitrogen scale
Answer: A
Rationale: Standard reference isotope.
6. Empirical formula shows:
A. Simplest whole number ratio
B. Actual number of atoms
C. Molecular structure
D. Shape only
Answer: A
Rationale: Simplest composition ratio.
7. Molecular formula shows:
A. Actual number of atoms
B. Simplest ratio only
C. Shape only
D. Color only
Answer: A
Rationale: True molecular composition.
8. Percentage composition refers to:
A. Elemental mass percentage
B. Volume only
C. Pressure only
D. Temperature
Answer: A
Rationale: Mass contribution of elements.
9. Stoichiometry is:
A. Calculation of reactants and products
B. Study of colors
C. Study of gases only
D. Study of liquids only
Answer: A
Rationale: Quantitative reaction relationships.
, 10. Balanced equation ensures:
A. Conservation of atoms
B. Change in mass
C. Loss of energy
D. Color change
Answer: A
Rationale: Atom conservation principle.
11. Limiting reactant is:
A. Reactant that is used up first
B. Excess reactant
C. Catalyst
D. Product
Answer: A
Rationale: Limits product formation.
12. Excess reactant is:
A. Remains after reaction
B. Always used up
C. Product only
D. Catalyst only
Answer: A
Rationale: Not fully consumed.
13. Theoretical yield is:
A. Maximum possible product
B. Actual product
C. Random amount
D. Loss amount
Answer: A
Rationale: Calculated maximum.
14. Actual yield is:
A. Experimentally obtained product
B. Calculated value
C. Constant value
D. Zero value
Answer: A
Rationale: Real experimental result.
