AnswersPA-Science 8 Q1Lab: Rate of Chemical Reactions

Lab: Rate of Chemical Reactions — Unit test Answers

0 verified answers
1
Free Preview

[BLANK]

A
synthesis
B
polymerization
C
decomposition
D
oxidation
E
replacement
2
Free Preview

The first chart shows the effect of the normal breakdown of material from reactants to products. The second chart shows the same reaction but with an added modification.

Question illustration
A
Reaction A has an enzyme.
B
Reaction B has an enzyme.
C
Reaction A has an inhibitor.
D
Reaction B has an inhibitor.
3

What is produced during the replacement reaction of Cu(NO3)2 and Zn?

A
ZnNO3 + Cu
B
Zn + Cu(NO3)2
C
ZnCu + 2NO3
D
Zn(NO3)2 + Cu
4

Which statement summarizes the difference between mass and weight?

A
Mass is the downward pull on an object due to gravity, and weight is the amount of matter in an object.
B
Mass is the amount of matter in an object, and weight is the downward pull on an object due to gravity.
C
Mass is measured in newtons, and weight is measured in pounds.
D
Mass is measured in pounds, and weight is measured in newtons.
5

Which best describes what is made of matter?

A
all living things and objects
B
all atoms
C
all solid objects and atoms
D
all living things
6

Uranium is a type of atom. In special circumstances that usually involve high amounts of energy, uranium can be broken. When this occurs, different pieces of the original atom remain, including a substance called plutonium.Which statement most likely describes plutonium?

A
It will still be uranium, just smaller pieces of uranium.
B
It must no longer be a form of matter.
C
It must be a different kind of atom.
D
It will be different than, but have the same properties as, uranium.
7

If a chemical reaction does not reach its activation energy, which will most likely occur?

A
The chemical bonds will remain unchanged.
B
The chemical bonds will break.
C
The chemical bonds will have high kinetic energy.
D
The chemical bonds will already be broken.
8

Shiloh wanted to observe the changes that occurred during an exothermic reaction. He monitored the changes and placed them in a chart. Which statement best describes his data?

Question illustration
A
The activation energy was reached at 10:45 a.m. Without the additional energy, the reaction would have stopped.
B
The activation energy was reached at 11:15 a.m. The previous change was the threshold point for a reaction.
C
The activation energy was reached at 10:15 a.m. The additional energy allowed for a lower activity level.
D
The activation energy was reached was 10:45 a.m. The additional energy did not affect the reaction.
9

Why is matter so diverse in its properties and characteristics?

A
Different combinations of various atoms result in a wide range of matter.
B
When atoms are split, new matter will be created.
C
Matter consists of various atoms that are chemically identical.
D
The size of atoms in matter depends on their temperature.
10

What else is produced during the replacement reaction of magnesium and hydrochloric acid?Mg + 2HCl H2 + ________

Question illustration
A
MgCl2
B
Mg2Cl2
C
Mg2Cl
D
MgCl
11

Which type of reaction is Mg + S → MgS?

A
polymerization
B
synthesis
C
replacement
D
decomposition
12

Mora measures the speed of the particles in a solid mass. She wants to speed up the action. Which action will allow her to do so?

A
adding more mass
B
breaking it apart
C
using an inhibitor
D
lowering the activation energy

Did you find these answers helpful?

More from this Course

Quiz
16 verified answers

Unit Test

Quiz
15 verified answers

Unit Test

Quiz
15 verified answers

Unit Test

Lab: Rate of Chemical Reactions — Unit test…