CHEM 103 FINAL EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
quantitative observations are not: - CORRECT-ANSWERSdescriptive in nature
(T or F) all measurements consist of two parts: numerical values and optional units. - CORRECT-
ANSWERSfalse
(T or F) numerical values reflect the precision of the measurement. - CORRECT-ANSWERStrue
reliability of measurements is based on - CORRECT-ANSWERSprecision, accuracy, and uncertainty
density - CORRECT-ANSWERSis defined as mass/volume
Mercury (Hg) has a density of 13.6 g/cm3. what is the mass for 56 ml of mercury? - CORRECT-
ANSWERS760g
hydrates - CORRECT-ANSWERSare ionic compounds
, CaSO4 + 1/2 H2O is called - CORRECT-ANSWERScalcium sulfate hydrate
percent error is calculated with the following formula: - CORRECT-ANSWERS= (actual - experimental) x
100/experimental
BaCl2 ∙6 H2O is called - CORRECT-ANSWERSbarium chloride hexahydrate
When heating the hydrate to remove the water - CORRECT-ANSWERSThe crucible must be heated until it
is a constant weight
carbonates and bicarbonates - CORRECT-ANSWERSreact to produce carbonic acid that decomposed to
CO2 and H2O
A reaction mixture [2 Mg(s) + O2(g) à 2 MgO(s)] contains 38.6 g Mg and 53.2 g O2. What is the limiting
reactant? - CORRECT-ANSWERSmagnesium
A reaction mixture [2 Mg(s) + O2(g) --> 2 MgO(s)] contains 38.6 g Mg and 53.2 g O2. What is the
theoretical yield of MgO? - CORRECT-ANSWERS64.1 g
CORRECT QUESTIONS AND ANSWERS
2025
quantitative observations are not: - CORRECT-ANSWERSdescriptive in nature
(T or F) all measurements consist of two parts: numerical values and optional units. - CORRECT-
ANSWERSfalse
(T or F) numerical values reflect the precision of the measurement. - CORRECT-ANSWERStrue
reliability of measurements is based on - CORRECT-ANSWERSprecision, accuracy, and uncertainty
density - CORRECT-ANSWERSis defined as mass/volume
Mercury (Hg) has a density of 13.6 g/cm3. what is the mass for 56 ml of mercury? - CORRECT-
ANSWERS760g
hydrates - CORRECT-ANSWERSare ionic compounds
, CaSO4 + 1/2 H2O is called - CORRECT-ANSWERScalcium sulfate hydrate
percent error is calculated with the following formula: - CORRECT-ANSWERS= (actual - experimental) x
100/experimental
BaCl2 ∙6 H2O is called - CORRECT-ANSWERSbarium chloride hexahydrate
When heating the hydrate to remove the water - CORRECT-ANSWERSThe crucible must be heated until it
is a constant weight
carbonates and bicarbonates - CORRECT-ANSWERSreact to produce carbonic acid that decomposed to
CO2 and H2O
A reaction mixture [2 Mg(s) + O2(g) à 2 MgO(s)] contains 38.6 g Mg and 53.2 g O2. What is the limiting
reactant? - CORRECT-ANSWERSmagnesium
A reaction mixture [2 Mg(s) + O2(g) --> 2 MgO(s)] contains 38.6 g Mg and 53.2 g O2. What is the
theoretical yield of MgO? - CORRECT-ANSWERS64.1 g
