WorksheetsLesson 12, 13 and Law of Conservation of Mass Review
Total questions: 33
Worksheet time: 17mins
Name
Class
Date
1.
What is the law of conservation of mass?
a)
The part of the universe being studied
b)
The rest of the universe that interacts with the system
c)
Within a closed system, mass does not change
d)
A system that freely exchanges matter and energy
2.
System
a)
The part of the universe being studied
b)
The rest of the universe that interacts with the system
c)
Within a closed system, mass does not change
d)
A system that freely exchanges matter and energy
3.
Surroundings
a)
The part of the universe being studied
b)
The rest of the universe that interacts with the system
c)
Within a closed system, mass does not change
d)
A system that freely exchanges matter and energy
4.
Molecule
a)
A group of atoms bonded together
b)
Basic unit of a chemical element
c)
Coefficient
d)
Subscript
5.
3Na4
What is the subscript?
What is the subscript?
a)
1
b)
2
c)
3
d)
4
6.
3Na4
What is the coefficient?
What is the coefficient?
a)
1
b)
2
c)
3
d)
4
7.
3H2O3
How many Hydrogen (H) atoms?
How many Hydrogen (H) atoms?
a)
2
b)
3
c)
6
d)
9
8.
A system that only exchanges energy with its surroundings; mass is conserved.
a)
Open System
b)
Closed System
9.
Made up of 1 type of molecule.
a)
Pure substance
b)
Mixture
c)
Solution
d)
Solute
10.
Made up of 2 or more types of molecules.
a)
Pure substance
b)
Mixture
c)
Solution
d)
Solute
11.
Mouthwash
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
12.
Bowl of Lucky Charms
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
13.
Gold
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
14.
Bowl of Skittles
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
15.
Kool-Aid mix and Water
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
16.
Lemonade
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
17.
H2O
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
18.
Fe
a)
Homogeneous Mixture
b)
Hetergeneous Mixture
c)
Pure Substance
19.
all parts of the mixture are visible; particles not distributed evenly
a)
Homogeneous
b)
Hetergeneous
20.
all parts of the mixture are not visible; particles distributed evenly
a)
Homogeneous
b)
Hetergeneous
21.
Solution
a)
Homogeneous Mixture
b)
Heterogeneous Mixture
c)
Pure Substance
22.
Identify the solute:
Chocolate Milk
Chocolate Milk
a)
Milk
b)
Chocolate
c)
Cow
23.
Identify the solvent:
Chocolate Milk
Chocolate Milk
a)
Milk
b)
Chocolate
c)
Cow
24.
To form a new solution with another substance
a)
Insoluble
b)
Dissolve
c)
Soluble
d)
Mixture
25.
Unable to dissolve
a)
Insoluble
b)
Dissolve
c)
Soluble
d)
Mixture
26.
Able to dissolve
a)
Insoluble
b)
Heterogenous Mixtures
c)
Soluble
d)
Mixture
27.
Is NaNo3 endothermic or exothermic?
a)
Endothermic
b)
Exothermic
c)
Neither
28.
At 10oC what is the least soluble substance?
a)
Kl
b)
SO2
c)
KClO3
d)
NH4Cl
29.
Is SO2 endothermic or exothermic?
a)
Endothermic
b)
Exothermic
c)
Neither
30.
Solids that decrease in solubility with an increase in temperature.
a)
Endothermic
b)
Exothermic
c)
Solubility
d)
Saturated Solution
31.
Solids that increase in solubility with an increase in temperature.
a)
Endothermic
b)
Exothermic
c)
Solubility
d)
Saturated Solution
32.
The amount of a solute that will completely dissolve in a given amount of solvent
a)
Endothermic
b)
Exothermic
c)
Solubility
d)
Saturated Solution
33.
A solution in which no more solute can be dissolved in a solvent
a)
Endothermic
b)
Exothermic
c)
Solubility
d)
Saturated Solution
100 %
