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Law Of Conservation Of Mass
Test Description: 8.P.1.4
Instructions: Answer all questions to get your test result.
1) In chemical reactions, the total amount of matter at the end is less than at the beginning.
A
False
B
True
2) Matter/Mass cannot be created or destroyed.
A
Law of Gravity
B
Law of Conservation of Energy
C
Law of Superposition
D
Law of Conservation of Mass
3) A balanced chemical equation supports the law of conservation of mass.
A
True
B
Flase
4) If there are 25 atoms at the beginning of a chemical reaction, there will be _______ atoms at the end
A
25
B
30
C
15
D
20
5) In order to balance a chemical equation, you can change coefficients.
A
True
B
False
6) 2 molecules of H2O have how many total atoms
A
6
B
3
C
5
D
4
7) How many atoms are in one molecule of CO2
A
5
B
3
C
4
D
2
8) If a chemical reaction starts with 200 atoms then it will end with 200 atoms.
A
False
B
True
9) if you start a chemical reaction with 50 pounds of reactants, then you must have 50 pounds at the end.
A
False
B
True
10) How man atoms are in C6H12O6
A
18
B
30
C
12
D
24
*select an answer for all questions
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