WorksheetsParts of a Chemical Reaction and LOCM Practice
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
What part of the equation does the #1 represent?
a)
product
b)
produces/yields
c)
solid
d)
reactant
2.
The two (2) is indicating _________.
a)
subscripts
b)
reactants
c)
coefficients
d)
aqueous
3.
The three (3) indicates which part?
a)
reactants
b)
products
c)
equation
d)
formulas
4.
Number seven (7) is indicating ____ of the equation.
a)
reactants
b)
products
c)
equation
d)
formulas
5.
Element or Compound?
H2O
H2O
a)
Element
b)
Compound
6.
Element or Compound?
Au
Au
a)
Element
b)
Compound
7.
Element or Compound?
CF3CO2H
CF3CO2H
a)
Element
b)
Compound
8.
Element or Compound?
As
As
a)
Element
b)
Compound
9.
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
10.
A precipitate is a
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
11.
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
12.
If reaction starts with 20g of reactants it should produce
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
13.
Solve for the unknown mass: 6.1 g + ? g = 9.1 g
a)
15.2
b)
3 g
c)
15.2 g
d)
3
14.
According to the law of conservation of mass, how much zinc was present in the zinc carbonate?
a)
256 g
b)
88 g
c)
104 g
d)
40 g
15.
Does this picture follow the law of conservation of mass? Why?
a)
Yes, because both sides have the same number of the same types of atoms
b)
No, because the matter is changed.
c)
Yes, because the number of atoms is different on both sides.
d)
No, because matter is the same.
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