CHEM 101 Ivy Tech Final Questions and
Answers (2026) | Real Practice Questions |
Verified Answers | A+
• Which of the following is TRUE? -✓✓Stoichiometry allows prediction of
how much of the reactants are necessary to form a given amount of
product. Stoichiometry allows prediction of the amount of products that
form in a chemical reaction based on the amounts of reactants.
Stoichiometry shows the numerical relationship between chemical
quantities in a balanced chemical equation. ALL ARE TRUE
• Diatomic N2 can react with diatomic H2 to form ammonia (NH3). The
balanced chemical equation is: N2 + 3 H2 ⟶ 2 NH3 If 6 moles of H2 totally
reacted with more than enough N2, how many moles of ammonia would be
expected to form? -✓✓4 Moles
• How many grams of the excess reactant remain assuming the reaction
goes to completion and that you start with 15.5 g of Na2S and 12.1 g of
CuSO4? Reaction: Na2S+ CuSO4 ⟶ Na2SO4 + CuS -✓✓9.58
• Calculate the maximum number of grams of NH3 that can be produced by
the reaction of 2.00 g of N2 with 3.00 g of H2. Reaction: N2 (g) + 3H2 (g)
⟶ 2 NH3 (g) -✓✓2.43
• Which is the limiting reactant in the following reaction given that you start
with 42.0 g of CO2 and 99.9 g KOH? Reaction: CO2+ 2 KOH ⟶ K2CO3 +
H2O -✓✓KOH
• How many moles of lithium nitrate are theoretically produced if we start
with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3
Ca(NO3)2 + ⟶ 6LiNO3 + Ca3(PO4)2 -✓✓6.8
• Hydrochloric acid reacts with barium hydroxide according to the equation:
2 HCl (aq) + Ba(OH)2 (aq) ⟶ BaCl2 (aq) + 2 H2O ( l) Δ H= -118 kK
Calculate the heat (in kJ) associated with the complete reaction of 18.2
grams of HCl (aq). -✓✓-29.5
,• Consider the following reaction: 2 Mg + O2 ⟶ 2 MgO Δ Hrxn = -1203 kJ.
Calculate the amount of heat (in kJ) associated with complete reaction of 4
moles of Mg. -✓✓-2406 kJ
• How many grams of NO2 are theoretically produced if we start with 1.2
moles of S and 9.90 moles of HNO3? Reaction: S + 6HNO3 ⟶ H2SO4+ 6
NO3+ 2 H2O -✓✓331
• What is the limiting reactant for the following reaction given we have 3.4
moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 +
2Li3PO4 ⟶ 6LiNO3 + Ca3(PO4)2 -✓✓Ca(NO3)2
• How many moles of water are needed to react with 2.2 moles of Li2O?
Given: Li2O + H2O ⟶ 2 LiOH -✓✓2.2
• How many moles of chlorine gas are needed to make 0.6 moles of
sodium chloride? Given the reaction: 2 Na + Cl2 ⟶ 2NaCl -✓✓0.3
• How many moles of NH3 can be produced by the reaction of 2.00 g of N2
with 3.00 g H2? Reaction: N2 (g) + 3 H2 (g) ⟶ 2 NH3 (g) -✓✓0.143
• The reaction of one mole of nitrogen gas with three moles of hydrogen
gas releases 92 kJ of thermal energy to the surroundings. Which of the
following is TRUE? -✓✓This reaction is exothermic, This reaction has a
negative enthalpy of reaction, Complete reaction of two moles of nitrogen
gas would release 184 kJ of thermal energy in this reaction. *All of the
above are true
• If the theoretical yield of a reactant is 144 grams and the actual yield of
the reaction is 72 grams, the percent yield of the reaction is 200%. -
✓✓False
• Given the following generic equation, 2A +3B ⟶ A2B3 Δ Hrxn = +444 kJ,
if you completely reacted 1 mole of compound A, the amount of heat
absorbed would be 222 kJ. -✓✓True
• The limiting reactant is not necessarily the reactant with the least mass. -
✓✓True
, • Since heat must be supplied to melt ice, the melting of ice is an
endothermic process and so has a positive enthalpy value. -✓✓True
• Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries ⟶ 4 muffins. If
you have 9 cups of flour, 4 eggs, and plenty of blueberries, the theoretical
yield of muffins is 16 -✓✓True
• Which element is represented by the electron configuration 1s22s22p2? -
✓✓C
• If the electron configuration of a ground state sodium atom is
1s22s22p63s1, the electron configuration of the sodium cation (Na+) would
be: -✓✓1s2 2s2 2p2
• An accepted abbreviation format is to write an electron configuration that
includes a noble gas symbol in brackets. If you were writing an electron
configuration for a bromine atom, which elemental symbol would you place
in the bracket? -✓✓Ar
• What is the electron configuration for Kr? -
✓✓1s22s22p63s23p64s23d104p6
• Chlorine and bromine have very similar chemical properties. This is best
explained by the fact that both elements: -✓✓Have the same number of
valence electrons
• The "d" subshell can hold a maximum of ______ electrons. -✓✓10
• How many electrons are in a chlorine atom? -✓✓17
• When filling orbitals of equal energy, electrons fill them singly first with
parallel spins. This is known as: -✓✓Hund's Rule
• When the elements are arranged in order of increasing number of
protons, certain sets of properties recur periodically. -✓✓True
Answers (2026) | Real Practice Questions |
Verified Answers | A+
• Which of the following is TRUE? -✓✓Stoichiometry allows prediction of
how much of the reactants are necessary to form a given amount of
product. Stoichiometry allows prediction of the amount of products that
form in a chemical reaction based on the amounts of reactants.
Stoichiometry shows the numerical relationship between chemical
quantities in a balanced chemical equation. ALL ARE TRUE
• Diatomic N2 can react with diatomic H2 to form ammonia (NH3). The
balanced chemical equation is: N2 + 3 H2 ⟶ 2 NH3 If 6 moles of H2 totally
reacted with more than enough N2, how many moles of ammonia would be
expected to form? -✓✓4 Moles
• How many grams of the excess reactant remain assuming the reaction
goes to completion and that you start with 15.5 g of Na2S and 12.1 g of
CuSO4? Reaction: Na2S+ CuSO4 ⟶ Na2SO4 + CuS -✓✓9.58
• Calculate the maximum number of grams of NH3 that can be produced by
the reaction of 2.00 g of N2 with 3.00 g of H2. Reaction: N2 (g) + 3H2 (g)
⟶ 2 NH3 (g) -✓✓2.43
• Which is the limiting reactant in the following reaction given that you start
with 42.0 g of CO2 and 99.9 g KOH? Reaction: CO2+ 2 KOH ⟶ K2CO3 +
H2O -✓✓KOH
• How many moles of lithium nitrate are theoretically produced if we start
with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3
Ca(NO3)2 + ⟶ 6LiNO3 + Ca3(PO4)2 -✓✓6.8
• Hydrochloric acid reacts with barium hydroxide according to the equation:
2 HCl (aq) + Ba(OH)2 (aq) ⟶ BaCl2 (aq) + 2 H2O ( l) Δ H= -118 kK
Calculate the heat (in kJ) associated with the complete reaction of 18.2
grams of HCl (aq). -✓✓-29.5
,• Consider the following reaction: 2 Mg + O2 ⟶ 2 MgO Δ Hrxn = -1203 kJ.
Calculate the amount of heat (in kJ) associated with complete reaction of 4
moles of Mg. -✓✓-2406 kJ
• How many grams of NO2 are theoretically produced if we start with 1.2
moles of S and 9.90 moles of HNO3? Reaction: S + 6HNO3 ⟶ H2SO4+ 6
NO3+ 2 H2O -✓✓331
• What is the limiting reactant for the following reaction given we have 3.4
moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 +
2Li3PO4 ⟶ 6LiNO3 + Ca3(PO4)2 -✓✓Ca(NO3)2
• How many moles of water are needed to react with 2.2 moles of Li2O?
Given: Li2O + H2O ⟶ 2 LiOH -✓✓2.2
• How many moles of chlorine gas are needed to make 0.6 moles of
sodium chloride? Given the reaction: 2 Na + Cl2 ⟶ 2NaCl -✓✓0.3
• How many moles of NH3 can be produced by the reaction of 2.00 g of N2
with 3.00 g H2? Reaction: N2 (g) + 3 H2 (g) ⟶ 2 NH3 (g) -✓✓0.143
• The reaction of one mole of nitrogen gas with three moles of hydrogen
gas releases 92 kJ of thermal energy to the surroundings. Which of the
following is TRUE? -✓✓This reaction is exothermic, This reaction has a
negative enthalpy of reaction, Complete reaction of two moles of nitrogen
gas would release 184 kJ of thermal energy in this reaction. *All of the
above are true
• If the theoretical yield of a reactant is 144 grams and the actual yield of
the reaction is 72 grams, the percent yield of the reaction is 200%. -
✓✓False
• Given the following generic equation, 2A +3B ⟶ A2B3 Δ Hrxn = +444 kJ,
if you completely reacted 1 mole of compound A, the amount of heat
absorbed would be 222 kJ. -✓✓True
• The limiting reactant is not necessarily the reactant with the least mass. -
✓✓True
, • Since heat must be supplied to melt ice, the melting of ice is an
endothermic process and so has a positive enthalpy value. -✓✓True
• Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries ⟶ 4 muffins. If
you have 9 cups of flour, 4 eggs, and plenty of blueberries, the theoretical
yield of muffins is 16 -✓✓True
• Which element is represented by the electron configuration 1s22s22p2? -
✓✓C
• If the electron configuration of a ground state sodium atom is
1s22s22p63s1, the electron configuration of the sodium cation (Na+) would
be: -✓✓1s2 2s2 2p2
• An accepted abbreviation format is to write an electron configuration that
includes a noble gas symbol in brackets. If you were writing an electron
configuration for a bromine atom, which elemental symbol would you place
in the bracket? -✓✓Ar
• What is the electron configuration for Kr? -
✓✓1s22s22p63s23p64s23d104p6
• Chlorine and bromine have very similar chemical properties. This is best
explained by the fact that both elements: -✓✓Have the same number of
valence electrons
• The "d" subshell can hold a maximum of ______ electrons. -✓✓10
• How many electrons are in a chlorine atom? -✓✓17
• When filling orbitals of equal energy, electrons fill them singly first with
parallel spins. This is known as: -✓✓Hund's Rule
• When the elements are arranged in order of increasing number of
protons, certain sets of properties recur periodically. -✓✓True
