WorksheetsUnit 4 Review
Total questions: 20
Worksheet time: 18mins
Name
Class
Date
1.
Glucose (C6H12O6) contains atoms of carbon, hydrogen, and oxygen that are chemically bonded together. What type of matter is glucose?
a)
Glucose is an element
b)
Glucose is a compound
c)
Glucose is a mixture
d)
Glucose is a metal
2.
A pure substance that is made from one type of atom is a(n) ______________ .
a)
Mixture
b)
Atom
c)
Element
d)
Compound
3.
Mixtures
a)
are made of two different types of atoms chemically bonded together
b)
Are only liquids
c)
Cannot be separated
d)
Can be separated using physical properties
4.
The subscript 2 in H2O tells us
a)
There are 2 atoms of oxygen in one molecule of water
b)
There are 2 atoms of hydrogen in one molecule of water
c)
There are 2 molecules of water present
d)
The 2 tells me nothing, you wizard!
5.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
6.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
7.
A change where one or more new substances are created.
a)
Physical Change
b)
Chemical Change
8.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
9.
A mixture is the result of a physical change because...
a)
The parts can be separated
b)
A new substance is made
c)
There is a chemical reaction
d)
One part of the mixture disappears
10.
If reaction starts with 20g of reactants it should produce
a)
a total of 40g of products
b)
a total of 80 g of products
c)
a total of 10g of products
d)
a total of 20g of products
11.
Which of the models of a chemical reaction best represents the Law of Conservation of Mass?
a)
A
b)
B
c)
C
d)
D
12.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
13.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
14.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
15.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
16.
Balance this equation:
2Li + Cl2 -> LiCl
2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
17.
Name the part in red:
H2 + O2 -> H2O
H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
18.
Name the part in red:
H2 + O2 -> H2O
H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Reactant
d)
Subscript
19.
Name the part in red:
H2 + O2 -> H2O
H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Reactant
d)
Subscript
20.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
100 %
