WorksheetsBalancing Chemical Equations
Total questions: 15
Worksheet time: 31mins
Name
Class
Date
1.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
2.
Which of the following reactions is balanced?
a)
2CH4 + O2 -> CO2 + H2O
b)
CH4 + 2O2 -> CO2 + H2O
c)
CH4 + 2O2 -> CO2 + 2H2O
d)
None of the chemical equations are balanced.
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.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
5.
Which coefficients balance this equation:
NH3 + O2 ----> NO + H2O
NH3 + O2 ----> NO + H2O
a)
2,3,5,6
b)
5,5,4,6
c)
4,6,4,5
d)
4,5,4,6
6.
What is the unit of measurement for the amount of a substance
a)
Volume
b)
Mass
c)
Concentration
d)
Moles
7.
What is true about the molar mass of chlorine gas?
a)
The molar mass is 35.45 g
b)
The molar mass is 70.90 g
c)
The molar mass is equal to 1 mole of chlorine atoms
d)
none of the above.
8.
What is the volume of liquid in this graduated cylinder?
a)
40.0 mL
b)
40.3 mL
c)
43.0 mL
d)
44.0 mL
9.
5,000 mg=____________grams
a)
500 grams
b)
50 grams
c)
5 grams
d)
5,000 grams
10.
4,000 grams=_____________kg
a)
40
b)
400
c)
4
d)
4,000
11.
9 g=______________mg
a)
9 mg
b)
900 mg
c)
90 mg
d)
9,000 mg
12.
How many sig figs are there?
100.00
100.00
a)
1
b)
3
c)
4
d)
5
13.
How many sig figs are there?
100000000
100000000
a)
1
b)
9
c)
10
14.
How many sig figs are there?
0.00400
0.00400
a)
1
b)
3
c)
5
d)
6
15.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
100 %
