1. Question No. : (TCO 5) Which of the following factors will increase the rate of a
reaction?
Student Ans:
Adding more reactants
Increasing the temperature of the reaction
Adding a catalyst
Neither A, B, nor C will increase the rate of a reaction.
A, B, or C will increase the rate of a reaction.
Inst. Exp: Week 3 Lecture; Increasing the concentration of the reactants, increasing the
temperature of the reaction, & adding catalysts will increase the rate of a
reaction.
1930139412 MultipleChoice 2 True
0 1930139412 MultipleChoice 2
2. Question No. : (TCO 5) What should be the coefficient of hydrogen, H2, in the following
equation in order to make it balanced?
2 Al + 3 H2SO4 ---> Al2(SO4)3 + ? H2
Student
Ans: 5
1
4
2
3
Inst. Exp: Chapter 5; There are 6 hydrogens on the reactant side of the equation from the 3 H 2SO4
molecules. There must be 6 hydrogens on the product side, as well. Therefore, there are
3 H2.
1930139413 MultipleChoice 5 True
0 1930139413 MultipleChoice 5
3. Question No. : (TCO 5) Magnesium reacts with oxygen to form magnesium oxide &
has the following balanced chemical equation: 2 Mg + O 2 --> 2 MgO.
How many mole(s) of oxygen gas (O2) are needed to react with 4.0
moles of Mg?
Student Ans:
2.0 moles
3.0 moles
reaction?
Student Ans:
Adding more reactants
Increasing the temperature of the reaction
Adding a catalyst
Neither A, B, nor C will increase the rate of a reaction.
A, B, or C will increase the rate of a reaction.
Inst. Exp: Week 3 Lecture; Increasing the concentration of the reactants, increasing the
temperature of the reaction, & adding catalysts will increase the rate of a
reaction.
1930139412 MultipleChoice 2 True
0 1930139412 MultipleChoice 2
2. Question No. : (TCO 5) What should be the coefficient of hydrogen, H2, in the following
equation in order to make it balanced?
2 Al + 3 H2SO4 ---> Al2(SO4)3 + ? H2
Student
Ans: 5
1
4
2
3
Inst. Exp: Chapter 5; There are 6 hydrogens on the reactant side of the equation from the 3 H 2SO4
molecules. There must be 6 hydrogens on the product side, as well. Therefore, there are
3 H2.
1930139413 MultipleChoice 5 True
0 1930139413 MultipleChoice 5
3. Question No. : (TCO 5) Magnesium reacts with oxygen to form magnesium oxide &
has the following balanced chemical equation: 2 Mg + O 2 --> 2 MgO.
How many mole(s) of oxygen gas (O2) are needed to react with 4.0
moles of Mg?
Student Ans:
2.0 moles
3.0 moles
