WorksheetsChemical Equations
Total questions: 23
Worksheet time: 2hrs 55mins
Name
Class
Date
1.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
2.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
3.
Element or compound?
H2O
H2O
a)
element
b)
compound
4.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
5.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
6.
Number written below & to the right of a chemical symbol
a)
subscript
b)
reactant
c)
product
d)
coefficient
7.
Number placed in front of a chemical formula
a)
product
b)
coefficient
c)
reactant
d)
subscript
8.
Substances that form as the result of a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
subscripts
9.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
10.
How many oxygen atoms are in the products for the chemical reaction below?
4Fe + 3O2 → 2Fe2O3
a)
2
b)
3
c)
5
d)
6
11.
Does the image correctly represent the Law of Conservation of Mass?
a)
yes
b)
no
12.
Does the image represent the Law of Conservation of
a)
yes
b)
no
13.
What are the products of the chemical reaction pictured?
a)
CH4 and CO2
b)
CH4 and O2
c)
CO2 and 2H2O
d)
O2 and H2O
14.
Consider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
15.
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
16.
Identify the reactant(s) and product(s) of the reaction.
a)
All three are reactants and none are products.
b)
Hydrogen and water are the reactants, and oxygen is the product.
c)
Water and oxygen are the reactants, and hydrogen is the product.
d)
Hydrogen and oxygen are the reactants, and water is the product.
17.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
18.
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.
19.
How many reactants are in A + B ---> C ?
a)
1
b)
2
c)
3
d)
4
20.
How many products are in A + B ---> C
a)
1
b)
2
c)
3
d)
4
21.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
22.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
a)
2MgO
b)
2Mg +O
c)
2Mg + O2
23.
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
100 %
