WorksheetsIntro to Chemical Reactions
Total questions: 25
Worksheet time: 27mins
Name
Class
Date
1.
indicates substance is a liquid
a)
g
b)
cr
c)
aq
d)
l
2.
An ending substance that is made during a chemical reaction is called
a)
Reactant
b)
Product
c)
Atom
d)
Molecule
3.
The starting substances of a chemical reaction is called
a)
products
b)
substances
c)
reactants
4.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
5.
Describes the number of molecules in a compound and is used to balance a chemical reaction.
a)
coefficient
b)
subscript
c)
superscript
d)
SI unit
6.
Describes the number of atoms in a compound of each element.
a)
coefficient
b)
superscript
c)
subscript
d)
SI unit
7.
How many atoms in 2CaCO3?
a)
5
b)
7
c)
10
d)
12
8.
How many atoms in 3Na(H2O)2?
a)
10
b)
14
c)
21
d)
27
9.
What is a precipitate?
a)
A solid formed from a single replacement reaction
b)
An aqueous compound formed from single replacement reaction
c)
An aqueous compound formed from double replacement reaction
d)
A solid formed from a double replacement reaction
10.
Is Fe2O3 an element or a compound?
a)
compound
b)
element
11.
Is Fe for iron an element or a compound?
a)
compound
b)
element
12.
Which are the products in the reaction shown?
a)
Al2O3
b)
Al
c)
O2
13.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
14.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
15.
How many Hydrogen (H) atoms are in NH3O5?
a)
3
b)
4
c)
5
d)
1
16.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
17.
How many E atoms are there in this silly formula?
2E2Fg3Hi4
2E2Fg3Hi4
a)
4
b)
2
c)
1
d)
3
18.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
19.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
20.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
21.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
22.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
23.
What is the coefficient in the following: 3Cl2
a)
3
b)
2
c)
6
d)
1
24.
The symbol for a substance dissolved in water is
a)
(s)
b)
(l)
c)
(g)
d)
(aq)
25.
What is the arrow in a chemical equation...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
100 %
