Chem 101 | Questions with 100% Verified Answers | Latest
Update 2026/2027
Question: The relative numbers of reactants and products are
represented by:
Answer:
coefficients
Question: The correct order, from slowest to fastest, according to the
rate of reaction of each with sulfuric acid is: _______.
Select the correct answer below:
a 5-pound iron pipe; 5 pounds of iron shavings; 5 pounds of
iron powder; a 5-pound iron cube
a 5-pound iron cube; a 5-pound iron pipe; 5 pounds of iron
shavings; 5 pounds of iron powder
a 5-pound iron cube; 5 pounds of iron shavings; a 5-pound
iron pipe; 5 pounds of iron powder
a 5-pound iron pipe; 5 pounds of iron powder; 5 pounds of
iron shavings; a 5-pound iron cube
Answer:
a 5-pound iron cube; a 5-pound iron pipe; 5 pounds of iron shavings; 5 pounds of iron
powder
Question: A catalyst lowers the activation energy of a reaction by:
Answer:
providing an alternate pathway or mechanism
Question: Which is an example of the state of subdivision of the
reactants affecting the rate of reaction?
Select the correct answer below:
the smaller the piece of wood, the faster it burns
food spoils more quickly on the kitchen counter than in the
fridge
a reaction slows down as it proceeds
calcium reacts with water moderately, sodium reacts with
water explosively
Answer:
the smaller the piece of wood, the faster it burns
, Question: Which is an example of concentration affecting the rate of
reaction?
Select the correct answer below:
Calcium reacts with water moderately while sodium reacts
with water explosively.
Food spoils more quickly on the kitchen counter than in the
fridge.
The smaller the piece of wood, the faster it burns.
A reaction slows down as it proceeds.
Answer:
A reaction slows down as it proceeds.
Question: Which of the following illustrates how the intrinsic chemical
properties of a reactant affect reaction rate? (select all that
apply)
Answer:
Calcium reacts with water at a moderate rate to form hydrogen gas and a base, whereas
sodium reacts in a similar way in mere seconds.
A wooden headboard burns more quickly in a fire than an iron headboard.
Question: Which is an example of the chemical nature of substances
affecting the rate of reaction?
Select the correct answer below:
sodium oxidizes overnight whereas iron takes much longer
large pieces of iron react slowly with acids while finely divided
iron reacts more rapidly
food spoils more quickly on the kitchen counter than in the
fridge
all of the above
Answer:
sodium oxidizes overnight whereas iron takes much longer
Question: Which is an example of the state of subdivision of the
reactants affecting the rate of reaction?
Select the correct answer below:
a reaction proceeds more quickly in the laboratory when
placed over a Bunsen burner
a reaction slows down as it proceeds
calcium reacts with water moderately, sodium reacts with
water explosively
large pieces of iron react slowly with acids while finely divided
iron reacts more rapidly
Answer:
large pieces of iron react slowly with acids while finely divided iron reacts more rapidly
Update 2026/2027
Question: The relative numbers of reactants and products are
represented by:
Answer:
coefficients
Question: The correct order, from slowest to fastest, according to the
rate of reaction of each with sulfuric acid is: _______.
Select the correct answer below:
a 5-pound iron pipe; 5 pounds of iron shavings; 5 pounds of
iron powder; a 5-pound iron cube
a 5-pound iron cube; a 5-pound iron pipe; 5 pounds of iron
shavings; 5 pounds of iron powder
a 5-pound iron cube; 5 pounds of iron shavings; a 5-pound
iron pipe; 5 pounds of iron powder
a 5-pound iron pipe; 5 pounds of iron powder; 5 pounds of
iron shavings; a 5-pound iron cube
Answer:
a 5-pound iron cube; a 5-pound iron pipe; 5 pounds of iron shavings; 5 pounds of iron
powder
Question: A catalyst lowers the activation energy of a reaction by:
Answer:
providing an alternate pathway or mechanism
Question: Which is an example of the state of subdivision of the
reactants affecting the rate of reaction?
Select the correct answer below:
the smaller the piece of wood, the faster it burns
food spoils more quickly on the kitchen counter than in the
fridge
a reaction slows down as it proceeds
calcium reacts with water moderately, sodium reacts with
water explosively
Answer:
the smaller the piece of wood, the faster it burns
, Question: Which is an example of concentration affecting the rate of
reaction?
Select the correct answer below:
Calcium reacts with water moderately while sodium reacts
with water explosively.
Food spoils more quickly on the kitchen counter than in the
fridge.
The smaller the piece of wood, the faster it burns.
A reaction slows down as it proceeds.
Answer:
A reaction slows down as it proceeds.
Question: Which of the following illustrates how the intrinsic chemical
properties of a reactant affect reaction rate? (select all that
apply)
Answer:
Calcium reacts with water at a moderate rate to form hydrogen gas and a base, whereas
sodium reacts in a similar way in mere seconds.
A wooden headboard burns more quickly in a fire than an iron headboard.
Question: Which is an example of the chemical nature of substances
affecting the rate of reaction?
Select the correct answer below:
sodium oxidizes overnight whereas iron takes much longer
large pieces of iron react slowly with acids while finely divided
iron reacts more rapidly
food spoils more quickly on the kitchen counter than in the
fridge
all of the above
Answer:
sodium oxidizes overnight whereas iron takes much longer
Question: Which is an example of the state of subdivision of the
reactants affecting the rate of reaction?
Select the correct answer below:
a reaction proceeds more quickly in the laboratory when
placed over a Bunsen burner
a reaction slows down as it proceeds
calcium reacts with water moderately, sodium reacts with
water explosively
large pieces of iron react slowly with acids while finely divided
iron reacts more rapidly
Answer:
large pieces of iron react slowly with acids while finely divided iron reacts more rapidly
