CHEM 103 Lab Final Exam | Verified Exam Questions and Answers | Latest Updated Study Material 2026

CHEM 103 Lab Final Exam | Verified Exam Questions and Answers |
Latest Updated Study Material 2026
Question:
Are always ionic compounds
Answer:

Hydrates

Question:
CaSO4 **1/2H2O is called
Answer:

Calcium sulfate hemihydrate

Question:
Percent error is calculated with the following formula
Answer:

Percent error = (actual - experimental)/experimental x100

Question:
BaCl2 * 6H2O is called
Answer:

Barium chloride hexahydrate

Question:
When heating the hydrate to remove the water the crucible must
Answer:

Be heated until it is a constant weight

Question:
Carbonates and bicarbonates
Answer:

React with acids to produce carbonic acid that decomposed to CO2 and H2O

, Question:
A reaction mixture [2Mg(s) + O2(g) -> 2MgO(s)] caintains 38.6 g MG and 53.2 g O2. What is the
limiting reactant?
Answer:

Magnesium

Question:
A reaction mixture [2Mg(s) + O2(g) -> 2MgO(s)] caintains 38.6 g MG and 53.2 g O2. What is the
theoretical yield of MgO?
Answer:

64.1 g

Question:
A reaction mixture [2Mg(s) + O2(g) -> 2MgO(s)] caintains 38.6 g MG and 53.2 g O2. The reaction
yielded 56.4 g of product. What is the percent yield of MgO?
Answer:

88.0%

Question:
(True/False) It doesn't matter how much acid is added to the crucible in the lab, as long as it does not
overflow the container
Answer:

True

Question:
When a 0.1451 g sample of an organic liquid was vaporized, the volume of the vapor was found to be
68.35 ml at 100.25 *C and 762.13 mmHg. What is the molar mass of the liquid?
Answer:

64.87 g/mol

Question:
When a 0.1451 g sample of an organic liquid was vaporized, the volume of the vapor was found to be
68.35 ml at 100.25 *C and 762.13 mmHg. If the molar mass was calculated to be 58.06 g/mol, how many
moles are involved?
Answer:

0.002499 moles