WorksheetsBalancing chemical equation review, G10
Total questions: 10
Worksheet time: 26mins
Name
Class
Date
1.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
2.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
3.
How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H2
Mg + __HCl ---> MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
4.
Is this balanced?
Al + O2 → 2Al2O3
Al + O2 → 2Al2O3
a)
Yes
b)
No
5.
Which number should go in the blank?
Al(NO3)3 + _ NaOH -> Al(OH)3 + 3 NaNO3
Al(NO3)3 + _ NaOH -> Al(OH)3 + 3 NaNO3
a)
1
b)
2
c)
3
d)
0
6.
Indicate the respective coefficients needed to balance the chemical equation.
N2O5(s) + NO(g) → NO2(g)
(a)
7.
Indicate the respective coefficients needed to balance the chemical equation.
Mg(s) + Cr2(SO4)3(aq) → MgSO4(aq) + Cr(s)
(a)
8.
Indicate the respective coefficients needed to balance the chemical equation.
NaCl(aq) + H2O(l) → NaOH(aq) + H2(g) + Cl2(g)
(a)
9.
Is the following equation balanced?
Al + O2 ---> 2Al2O3
a)
YES
b)
NO
10.
Is the following equation balanced?
4Fe + 3O2 ---> 2Fe2O3
a)
YES
b)
NO
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