CHEM 103 FINAL EXAM QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+||UPDATED 2026
Q: What is a characteristic that quantitative observations do NOT
possess? A: ✔️✔️ They are not descriptive or qualitative in nature; instead,
they focus strictly on measurable data and specific quantities.
Q: True or False: Every scientific measurement is made up of two
components: a number and an optional unit. A: ✔️✔️ False. Units are never
optional in scientific measurements; a numerical value without a unit lacks
context and physical meaning.
Q: True or False: The numerical values recorded in a measurement are a
reflection of its precision. A: ✔️✔️ True. The number of significant figures
used directly indicates the level of detail or exactness provided by the
measuring instrument.
Q: Upon what factors is the reliability of a measurement based? A: ✔️✔️
Reliability is determined by three key factors: accuracy (how close it is to the
true value), precision (how consistent the results are), and the degree of
uncertainty involved in the process.
density -ANSWER ✔️✔️is defined as mass/volume
Mercury (Hg) has a density of 13.6 g/cm3. what is the mass for 56 ml of
mercury? -ANSWER ✔️✔️760g
hydrates -ANSWER ✔️✔️are ionic compounds
CaSO4 + 1/2 H2O is called -ANSWER ✔️✔️calcium sulfate hydrate
percent error is calculated with the following formula: -ANSWER ✔️✔️= (actual
- experimental) x 100/experimental
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+||UPDATED 2026
Q: What is a characteristic that quantitative observations do NOT
possess? A: ✔️✔️ They are not descriptive or qualitative in nature; instead,
they focus strictly on measurable data and specific quantities.
Q: True or False: Every scientific measurement is made up of two
components: a number and an optional unit. A: ✔️✔️ False. Units are never
optional in scientific measurements; a numerical value without a unit lacks
context and physical meaning.
Q: True or False: The numerical values recorded in a measurement are a
reflection of its precision. A: ✔️✔️ True. The number of significant figures
used directly indicates the level of detail or exactness provided by the
measuring instrument.
Q: Upon what factors is the reliability of a measurement based? A: ✔️✔️
Reliability is determined by three key factors: accuracy (how close it is to the
true value), precision (how consistent the results are), and the degree of
uncertainty involved in the process.
density -ANSWER ✔️✔️is defined as mass/volume
Mercury (Hg) has a density of 13.6 g/cm3. what is the mass for 56 ml of
mercury? -ANSWER ✔️✔️760g
hydrates -ANSWER ✔️✔️are ionic compounds
CaSO4 + 1/2 H2O is called -ANSWER ✔️✔️calcium sulfate hydrate
percent error is calculated with the following formula: -ANSWER ✔️✔️= (actual
- experimental) x 100/experimental
