UKY CHEM 105 Final Exam Questions
with complete solution 2025/2026
Classify each element with either "element" or "compound": aluminum, silver chloride, potassium, sugar
- correct answer ✔aluminum;element silver chloride;compound potassium;element sugar;compound
intensive property - correct answer ✔a property that depends on the type of matter in a sample, not
the amount of matter
extensive property - correct answer ✔a property that depends on the amount of matter in a sample
A glass of water has a mass of 100. g, a volume of 100. mL, a height of 10. cm and a density of 1.00 g/mL.
Which is the intensive property of the water? - correct answer ✔density
The diameter of an atom is approximately 1 × 10-8 cm. Which one also correctly expresses the size of an
atom? - correct answer ✔1 × 10^-4 μm
What is the volume of 35.4 g of hexane if the density is 0.654 g/mL? - correct answer ✔54.1 mL
What is the answer to the following calculation?: 6.626 * 10^-34/(9.11 * 10^-31) * (275) - correct
answer ✔2.64 * 10^-6
How many zeros are significant in the number 0.0030450? - correct answer ✔2
What is the correct answer (reported to the correct number of significant figures) to the calculation
shown?
(1815 - 1806) × (9.11 × 7.92) = - correct answer ✔600
,A bumblebee flies with a ground speed of 15 m/s. What is this speed in miles per hour?
Report your answer with two significant figures. Do NOT include units in your answer. - correct answer
✔Between 33 and 35
The density of lead is 11.29 g/cm3. What is the mass, in grams, of a 4.50 in3 quantity of lead? - correct
answer ✔833g
If 24 g of carbon react with oxygen to produce 64 g of carbon dioxide, how many grams of oxygen
reacted? - correct answer ✔40 g
Which was not explained by Dalton's atomic theory?: "Mass is conserved during a chemical reaction"
"Atoms from an element differ from those of all other elements" "That many elements exhibit isotopes"
"That atoms combine in small whole number ratios to form molecules" - correct answer ✔"That many
elements exhibit isotopes"
What did Rutherford conclude from the gold-foil experiments by Geiger and Marsden? - correct answer
✔Most of the atom is empty space with a tiny positively charged center called the nucleus.
Select the correct sub-atomic particle (electron,proton, or neutron): Has the least mass, Has a positive
charge, Has a negative charge - correct answer ✔electron;proton;electron
alpha particle symbol - correct answer ✔4/2 He
beta particle symbol - correct answer ✔0/-1 e
Gamma particle symbol - correct answer ✔0/0 y
, The isotope represented by the symbol ^136Xe contains how many protons (p), neutrons (n), and
electrons (e)? - correct answer ✔p = 54, n = 82, e = 54
Copper exists as two isotopes, ^63Cu and ^65Cu. The mass of ^63Cu is 62.9296 u with an abundance of
69.15%. What is the mass of ^65Cu? - correct answer ✔64.93u
The Sn4+ ion has _________ protons and __________ electrons. - correct answer ✔50,46
Iodine has only one stable isotope. Which is the correct symbol for the most common ion of naturally
occurring iodine? - correct answer ✔^127i-
Determine what periodic group each element is part of: Br,Sr,Xe - correct answer ✔Halogen, Alkaline
Earth Metal, Noble Gas
Classify each element as a main group metal, nonmetal, metalloid, transition metal, lanthanide, or
actinide: Nickel, Germanium, Thorium - correct answer ✔Transition metal, metalloid, actinide
Select all the molecular elements. No partial credit will be given: P4, SF4, O2, Al - correct answer ✔P4,
O2
Which is a molecular compound?: TiO, Na2S, K2SO4, CCl4 - correct answer ✔CCl4
Do these atoms all have common ionic charges?: K2+, Ba+, Cl‒, N3‒ - correct answer ✔no
What is the formula for iron(II)carbonate? - correct answer ✔FeCO3
What is the charge of Mn in MnO2? - correct answer ✔+4
with complete solution 2025/2026
Classify each element with either "element" or "compound": aluminum, silver chloride, potassium, sugar
- correct answer ✔aluminum;element silver chloride;compound potassium;element sugar;compound
intensive property - correct answer ✔a property that depends on the type of matter in a sample, not
the amount of matter
extensive property - correct answer ✔a property that depends on the amount of matter in a sample
A glass of water has a mass of 100. g, a volume of 100. mL, a height of 10. cm and a density of 1.00 g/mL.
Which is the intensive property of the water? - correct answer ✔density
The diameter of an atom is approximately 1 × 10-8 cm. Which one also correctly expresses the size of an
atom? - correct answer ✔1 × 10^-4 μm
What is the volume of 35.4 g of hexane if the density is 0.654 g/mL? - correct answer ✔54.1 mL
What is the answer to the following calculation?: 6.626 * 10^-34/(9.11 * 10^-31) * (275) - correct
answer ✔2.64 * 10^-6
How many zeros are significant in the number 0.0030450? - correct answer ✔2
What is the correct answer (reported to the correct number of significant figures) to the calculation
shown?
(1815 - 1806) × (9.11 × 7.92) = - correct answer ✔600
,A bumblebee flies with a ground speed of 15 m/s. What is this speed in miles per hour?
Report your answer with two significant figures. Do NOT include units in your answer. - correct answer
✔Between 33 and 35
The density of lead is 11.29 g/cm3. What is the mass, in grams, of a 4.50 in3 quantity of lead? - correct
answer ✔833g
If 24 g of carbon react with oxygen to produce 64 g of carbon dioxide, how many grams of oxygen
reacted? - correct answer ✔40 g
Which was not explained by Dalton's atomic theory?: "Mass is conserved during a chemical reaction"
"Atoms from an element differ from those of all other elements" "That many elements exhibit isotopes"
"That atoms combine in small whole number ratios to form molecules" - correct answer ✔"That many
elements exhibit isotopes"
What did Rutherford conclude from the gold-foil experiments by Geiger and Marsden? - correct answer
✔Most of the atom is empty space with a tiny positively charged center called the nucleus.
Select the correct sub-atomic particle (electron,proton, or neutron): Has the least mass, Has a positive
charge, Has a negative charge - correct answer ✔electron;proton;electron
alpha particle symbol - correct answer ✔4/2 He
beta particle symbol - correct answer ✔0/-1 e
Gamma particle symbol - correct answer ✔0/0 y
, The isotope represented by the symbol ^136Xe contains how many protons (p), neutrons (n), and
electrons (e)? - correct answer ✔p = 54, n = 82, e = 54
Copper exists as two isotopes, ^63Cu and ^65Cu. The mass of ^63Cu is 62.9296 u with an abundance of
69.15%. What is the mass of ^65Cu? - correct answer ✔64.93u
The Sn4+ ion has _________ protons and __________ electrons. - correct answer ✔50,46
Iodine has only one stable isotope. Which is the correct symbol for the most common ion of naturally
occurring iodine? - correct answer ✔^127i-
Determine what periodic group each element is part of: Br,Sr,Xe - correct answer ✔Halogen, Alkaline
Earth Metal, Noble Gas
Classify each element as a main group metal, nonmetal, metalloid, transition metal, lanthanide, or
actinide: Nickel, Germanium, Thorium - correct answer ✔Transition metal, metalloid, actinide
Select all the molecular elements. No partial credit will be given: P4, SF4, O2, Al - correct answer ✔P4,
O2
Which is a molecular compound?: TiO, Na2S, K2SO4, CCl4 - correct answer ✔CCl4
Do these atoms all have common ionic charges?: K2+, Ba+, Cl‒, N3‒ - correct answer ✔no
What is the formula for iron(II)carbonate? - correct answer ✔FeCO3
What is the charge of Mn in MnO2? - correct answer ✔+4
