WorksheetsChemistry: Chemical Reactions
Total questions: 38
Worksheet time: 21mins
Name
Class
Date
1.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
2.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
3.
The number of Na's in Na₂CO₃
a)
1
b)
2
c)
3
d)
6
4.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
5.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
6.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
7.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
8.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
9.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
10.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
11.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
12.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
13.
How many Hydrogen atoms are in 4H2O?
a)
6
b)
8
c)
2
d)
4
14.
How many Magnesium atoms are in 10MgCl2?
a)
10
b)
5
c)
20
15.
What is C2H8O ?
a)
Element
b)
Letters
c)
Numbers
d)
Compound
16.
A copper penny turning greenish after a few years is an example of ...
a)
Chemical Change
b)
Physical Change
17.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
18.
Which of the following is NOT an example of chemical change?
a)
sour milk
b)
burning wood
c)
breaking a pencil
d)
rust
19.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
20.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
21.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
22.
Is a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
23.
Ripping up paper ...
a)
Chemical Change
b)
Physical Change
24.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
25.
Evidence of Chemical Change.
a)
New Substance
b)
Size change
c)
State change
d)
Mixture
26.
What are the products of the chemical reaction pictured?
a)
CH4 and CO2
b)
CH4 and O2
c)
CO2 and H2O
d)
O2 and H2O
27.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
28.
What is the left part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
29.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
30.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
a)
2MgO
b)
2Mg +O
c)
2Mg + O2
31.
This is used to represent the number of each atom being represented.
a)
A Exponent
b)
The Coefficient
c)
A Molecule
d)
The Subscript
32.
This appears on the left side of a chemical formula, and represents how many molecules there are.
a)
An Atom
b)
The Subscript
c)
A Molecule
d)
The Coefficient
33.
How many TOTAL atoms are on the REACTANT side of this equation?
CH4 + 2O2 → CO2 + 2H2O
CH4 + 2O2 → CO2 + 2H2O
a)
5
b)
7
c)
9
d)
11
34.
What is the density?
a)
2
b)
800
c)
60
d)
20
35.
If the volume is 5 mL, what is the density?
a)
5
b)
25
c)
100
d)
50
36.
What is the formula for Volume?
a)
Mass/Volume
b)
Density x Volume
c)
Mass/Density
37.
What units are used to measure Density?
a)
mL/g
b)
g
c)
g/mL
d)
mL
38.
What is the formula for Volume?
a)
Mass/Volume
b)
Density x Volume
c)
Mass/Density
100 %
