Section C Review Pg.153-179
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Review of Section C Law of Conservation of Matter.
- 1.What is the molar mass of Carbon?
- A.
6 g/mol
- B.
12.01 g/mol
- C.
19.00 g/mol
- D.
1.01 g/mol
- 2.What is the molar mass of CH4 (methane)?
- A.
12.01 g/mol
- B.
13.02 g/mol
- C.
16.05 g/mol
- D.
32.10 g/mol
- 3.What is the molar mass of (NH4)2CO3 (Ammonium carbonate)?
- A.
96.11 g/mol
- B.
82.10 g/mol
- C.
106.11 g/mol
- D.
43.01 g/mol
- 4.What is the molecular mass of Cu3(PO4)2?
- A.
253.49 g/mol
- B.
380.59 g/mol
- C.
110.22 g/mol
- D.
348.59 g/mol
- 5.What is the molecular mass of Aluminum nitrate Al(NO3)3 from this equation: 2Al(s) + 3Fe(NO3)2(aq) à 3Fe(s) + 2Al(NO3)3(aq)
- A.
213.01 g/mol
- B.
335.98 g/mol
- C.
56.99 g/mol
- D.
141.01 g/mol
- 6.What coefficients will balance the following equation H2 + O2 ---> H2O
- A.
2,2,1
- B.
2,1,2
- C.
4,1,2
- D.
2,2,2
- 7.What coefficients will balance the following equation Al + O2 --> Al2O3
- A.
1,3,2
- B.
4,3,2
- C.
2,2,2
- D.
2,1,3
- 8.What coefficients will balance the following equation AgNO3 + NaCl ----> AgCl + NaNO3
- A.
2,2,2,1
- B.
1,1,1,1
- C.
1,2,1,2
- D.
2,1,2,1
- 9.What coefficients will balance the following equation K + H2O -----> KOH + H2
- A.
1,1,1,1
- B.
2,2,2,1
- C.
2,1,2,1
- D.
1,2,1,2
- 10.What coefficients will balance the following equation Hg + O2 ----> HgO
- A.
1,1,1
- B.
2,2,1
- C.
2,1,2
- D.
1,2,2
- 11.A balanced chemical equation shows the proportions of reactants and products necessary for
- A.
The reaction to occur
- B.
Mass to be conserved.
- C.
Energy use to be minimized.
- D.
Electrolysis to occur.
- 12.A chemical equation is balanced by changing or adding
- A.
Chemical symbols
- B.
Subscripts
- C.
Coefficients
- D.
Reactants
- 13.What happens in a chemical reaction?
- A.
Atoms are destroyed
- B.
Atoms are created
- C.
Atoms are rearranged
- D.
Atoms are heated or cooled
- 14.A substance that undergoes a change in a chemical reaction is
- A.
A product
- B.
A chemical
- C.
A reactant
- D.
An enzyme
- 15.What are the percent composition for SF2?
- A.
55 % Sulfur and 45% Fluorine
- B.
45.76% Sulfur and 54.39 % Fluorine
- C.
33% Sulfur and 67% Fluorine
- D.
49.2 % Sulfur and 50.8 % Fluorine
- 16.What is the percent composition of Ethyne? C2H2?
- A.
92.31% Carbon and 7.76% Hydrogen
- B.
82% Carbon and 18% Hydrogen
- C.
82.7% Carbon and 17.3 % Hydrogen
- D.
90% Carbon and 14 % Hydrogen
- 17.What is the percentage of Sulfur in SF2?
- A.
32.06 % Sulfur
- B.
25% Sulfur
- C.
45.15 % Sulfur
- D.
62.67 % Sulfur
- 18.What is the empirical formula for a compound that contains 1.67 mole Carbon and 5.01 Moles of Hydrogen
- A.
CH
- B.
CH2
- C.
C2H3
- D.
CH3
- 19.What is the empirical formula for a compound that contains 37.69% Na and 62.31 % Fluorine?
- A.
NaF3
- B.
Na2F
- C.
NaF
- D.
NaF2
- 20.What is the empirical formula for: 85.60% C and 14.40% H?
- A.
C2H3
- B.
CH2
- C.
CH3
- D.
C2H4
- 21.What does the Law of Conservation of Matter refer to?
- A.
Matter can not be created or destroyed.
- B.
Matter can be created but can not be destroyed.
- C.
Matter can be destroyed but not created.
- 22.What is Matter?
- 23.What side of the equation are the reactants on?
- A.
Right
- B.
Left
- C.
Middle
- D.
Both.
- 24.What are the reactants in the following equation? H2 + O → H2O
- A.
Hydrogen
- B.
Oxygen
- C.
Water
- D.
Hydrogen and Oxygen
- 25.How many atoms of N are in the following molecule? NH3
- A.
1
- B.
2
- C.
3
- D.
0
- 26.How many atoms of Fe are in the following molecule? Fe2O3
- A.
0
- B.
1
- C.
2
- D.
3
- 27.Is the following equation balanced? NH3 + HCl --> NH4Cl (yes or no)
- 28.What are the correct coefficients needed to balance the following equation? ____Al + _____ O2 --> ____ Al2O3
- A.
2,3,4
- B.
1,3,2
- C.
4,3,2
- D.
4,2,3
- 29.What is balanced a chemical equation
- A.
The number of atoms of each element that is the same on both sides.
- B.
The weight of the elements is the same when added
- C.
They sit flat on a table
- D.
Equal all around the liquid
- 30.Scientific law is
- A.
A science law
- B.
Simplified set of rules to follow
- C.
Scientific generalizations of countless observations.
- D.
A little more than a hypothesis
- 31.The first step you should take in balancing a chemical equation is to do an ___________
- 32.________________ is the atomic weights of elements can be used to find the mass of one mole of any substance.
- 33.In Chemistry Knowing the mass of one unit enables us to count by_______________
- 34.The number 6.02 x 10^23 represents ______________________
- 35.The percent of mass by which each material found in an item is called the________________________
- 36.An approach that aims to eliminate pollution in industrial settings is called __________________
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