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WorksheetsMission 1
Total questions: 15
Worksheet time: 29mins
Name
Class
Date
1.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
2.
Balance this equation
......Zn+.......HCl --> .......ZnCl2 + ......H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
3.
What does the Law of Conservation of Mass state?
(a)
4.
Balance this equation, Al2O3 ---> Al + O2
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2
c)
2Al2O3 ---> 4Al + 3O2
d)
3Al2O3 ---> 2Al + O2
5.
The red numbers in the image below represent (a)
6.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
7.
Balance this equation...
H2 + Cl2 --> HCl
H2 + Cl2 --> HCl
a)
It is balanced
b)
3H2 + Cl2 --> 6H2Cl
c)
H2 + Cl2 --> 2HCl
d)
I don't know! Oh well.
8.
Which is the correct atom count for the reactant side of the chemical equation?
CH4 + 2 O2 -> CO2 + 2 H2O
CH4 + 2 O2 -> CO2 + 2 H2O
a)
C=4
H=4
O=4
H=4
O=4
b)
C=1
H=4
O=2
H=4
O=2
c)
C=1
H=4
O=2
H=4
O=2
d)
C=1
H=4
O=4
H=4
O=4
9.
A coefficient tells you...
a)
the # of atoms in the entire equation
b)
the # of elements in the equation
c)
the # atoms of the element it sits behind
d)
the # of molecules of that substance
10.
In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?
(a)
11.
If a reaction starts with a total 75g of reactants it should produce
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
12.
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
a)
17g
b)
2g
c)
7g
d)
None of the above
13.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
14.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
15.
What are the evidences of chemical reaction?
4 lines
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